'use strict';

const APP_BASE = (() => {
  const src = document.currentScript?.src || '';
  try { const path = new URL(src, location.href).pathname; return path.endsWith('/app.js') ? path.slice(0, -7).replace(/\/$/, '') : ''; } catch (_) { return ''; }
})();
const withBase = path => `${APP_BASE}${path.startsWith('/') ? path : `/${path}`}`;
const parseDecimal = value => { const normalized = String(value ?? '').trim().replace(',', '.'); const parsed = Number(normalized); return Number.isFinite(parsed) ? parsed : NaN; };

const getCookie = name => {
  const row = document.cookie.split('; ').find(item => item.startsWith(`${name}=`));
  return row ? decodeURIComponent(row.split('=').slice(1).join('=')) : '';
};
const setCookie = (name, value) => {
  document.cookie = `${name}=${encodeURIComponent(value)}; Max-Age=31536000; Path=${APP_BASE || '/'}; SameSite=Lax`;
};

const DEFAULT_LANGUAGE = 'en';
const preferredLanguage = getCookie('gree_controller_language') || DEFAULT_LANGUAGE;
const preferredTheme = ['system', 'light', 'dark'].includes(getCookie('gree_controller_theme')) ? getCookie('gree_controller_theme') : 'system';

const app = {
  devices: [], zones: [], groups: [], schedules: [], automations: [], accessTokens: [], settings: null, system: {}, outdoorTemperature: null,
  token: localStorage.getItem('gree_controller_token') || '', ws: null, wsTimer: null,
  currentView: 'dashboard', loading: false, language: preferredLanguage, theme: preferredTheme, connectionStatus: 'connecting',
  languages: [], translations: {}, locales: {},
  historyTab: 'overview', historyData: {zones:[], devices:[], sensors:[]}, historyCounts: {},
  historyZone: 'all', historyDevice: 'all', historySensor: 'all', historyLoading: false,
  customChartSeries: [], savedCharts: [], zoneControlSeq: {}, zoneTemperatureTimers: {},
  controlPlan: null, controlPlanTimer: null, debugLines: [], debugBacklogLoaded: false, sensorAliases: {},
  simulationScope: 'units', simulationTarget: 'all', standaloneSimulation: false,
};
try { app.savedCharts = JSON.parse(localStorage.getItem('gree_controller_saved_charts') || '[]'); } catch (_) { app.savedCharts = []; }

const $ = (selector, root = document) => root.querySelector(selector);
const $$ = (selector, root = document) => [...root.querySelectorAll(selector)];
const clamp = (value, min, max) => Math.min(max, Math.max(min, value));
const esc = value => String(value ?? '').replace(/[&<>'"]/g, char => ({'&':'&amp;','<':'&lt;','>':'&gt;',"'":'&#39;','"':'&quot;'}[char]));
const locale = () => app.locales[app.language] || app.locales[DEFAULT_LANGUAGE] || 'en-GB';
const tr = (key, params = {}) => {
  const template = app.translations[app.language]?.[key] ?? app.translations[DEFAULT_LANGUAGE]?.[key] ?? key;
  return String(template).replace(/\{([a-zA-Z0-9_]+)\}/g, (_, name) => params[name] ?? `{${name}}`);
};
const fmtTemp = value => value !== null && value !== undefined && value !== '' && Number.isFinite(Number(value)) ? `${Number(value).toFixed(1)}°C` : '--';
const historyNumber = value => value === null || value === undefined || value === '' ? NaN : Number(value);
const modeLabel = mode => tr(`mode.${mode}`) === `mode.${mode}` ? mode : tr(`mode.${mode}`);
const houseModeLabel = mode => mode === 'off' ? tr('house.noControl') : modeLabel(mode);
const fanLabel = value => ({0:'fan.auto',1:'fan.low',2:'fan.mediumLow',3:'fan.medium',4:'fan.mediumHigh',5:'fan.high'}[value] ? tr({0:'fan.auto',1:'fan.low',2:'fan.mediumLow',3:'fan.medium',4:'fan.mediumHigh',5:'fan.high'}[value]) : value);
const dateTime = value => value ? new Intl.DateTimeFormat(locale(), {dateStyle:'short', timeStyle:'short'}).format(new Date(value)) : '—';
const haSensorLabel = entity => app.sensorAliases?.[entity] || app.settings?.home_assistant?.sensor_aliases?.[entity] || entity;

function updateConnectionIndicator(status) {
  app.connectionStatus = status || 'connecting';
  const node = $('#connectionLabel');
  if (!node) return;
  const label = tr(`status.${app.connectionStatus}`);
  node.className = `connection-dot ${app.connectionStatus}`;
  node.setAttribute('aria-label', label);
  node.title = label;
}

function applyTheme() {
  const resolved = app.theme === 'light' || app.theme === 'dark'
    ? app.theme
    : (window.matchMedia('(prefers-color-scheme: light)').matches ? 'light' : 'dark');
  document.documentElement.dataset.theme = resolved;
  const meta = $('#themeColorMeta');
  if (meta) meta.content = resolved === 'light' ? '#f8faf9' : '#151515';
  const select = $('#themeSelect');
  if (select) select.value = app.theme;
  drawCurrentChartIfVisible();
}

function applyTranslations() {
  document.documentElement.lang = app.language;
  $$('[data-i18n]').forEach(node => { node.textContent = tr(node.dataset.i18n); });
  $$('[data-i18n-placeholder]').forEach(node => { node.placeholder = tr(node.dataset.i18nPlaceholder); });
  $$('[data-i18n-title]').forEach(node => { node.title = tr(node.dataset.i18nTitle); });
  $$('[data-i18n-aria]').forEach(node => { node.setAttribute('aria-label', tr(node.dataset.i18nAria)); });
  $$('[data-i18n-content]').forEach(node => { node.setAttribute('content', tr(node.dataset.i18nContent)); });
  $$('[data-day]').forEach(node => { node.textContent = tr(`day.${node.dataset.day}`); });
  $('#languageSelect').value = app.language;
  const themeSelect = $('#themeSelect'); if (themeSelect) { const icons={system:'◐',light:'☀',dark:'☾'}; [...themeSelect.options].forEach(o => { const key=`theme.${o.value}`; o.textContent=`${icons[o.value]||'◐'} ${tr(key)}`; }); themeSelect.value=app.theme; }
  updateConnectionIndicator(app.connectionStatus);
  renderAll();
  if (app.currentView === 'logs') loadLogs();
  if (app.currentView === 'history' && app.zones.length) loadHistory();
}

function setLanguage(language) {
  const available = app.languages.some(item => item.code === language);
  app.language = available ? language : DEFAULT_LANGUAGE;
  setCookie('gree_controller_language', app.language);
  applyTranslations();
}

function renderLanguageOptions() {
  const select = $('#languageSelect');
  if (!select) return;
  select.innerHTML = app.languages.map(item => {
    const label = item.native_name || item.name || item.code.toUpperCase();
    const flag = ({pl:'🇵🇱',en:'🇬🇧'})[item.code] || '🌐'; return `<option value="${esc(item.code)}">${flag} ${esc(label)}</option>`;
  }).join('');
  select.value = app.language;
}

async function loadLanguages() {
  try {
    const response = await fetch(withBase('/lang/index.json'), {cache: 'no-cache'});
    if (!response.ok) throw new Error(`Language index HTTP ${response.status}`);
    const manifest = await response.json();
    const languages = Array.isArray(manifest.languages) ? manifest.languages : [];
    if (!languages.some(item => item.code === DEFAULT_LANGUAGE)) throw new Error('Default English language pack is missing');

    const loaded = await Promise.all(languages.map(async item => {
      const packResponse = await fetch(withBase(item.path || `/lang/${encodeURIComponent(item.code)}.json`), {cache: 'no-cache'});
      if (!packResponse.ok) throw new Error(`Language ${item.code} HTTP ${packResponse.status}`);
      const pack = await packResponse.json();
      return {item, pack};
    }));

    app.languages = loaded.map(({item}) => item);
    app.translations = Object.fromEntries(loaded.map(({item, pack}) => [item.code, pack.translations || {}]));
    app.locales = Object.fromEntries(loaded.map(({item, pack}) => [item.code, pack.meta?.locale || item.locale || item.code]));
    app.language = app.languages.some(item => item.code === preferredLanguage)
      ? preferredLanguage
      : (manifest.default || DEFAULT_LANGUAGE);
    if (!app.languages.some(item => item.code === app.language)) app.language = DEFAULT_LANGUAGE;
    renderLanguageOptions();
  } catch (error) {
    console.error('Unable to load language packs:', error);
    app.languages = [{code: DEFAULT_LANGUAGE, name: 'English', native_name: 'English', locale: 'en-GB'}];
    app.translations = {[DEFAULT_LANGUAGE]: {}};
    app.locales = {[DEFAULT_LANGUAGE]: 'en-GB'};
    app.language = DEFAULT_LANGUAGE;
    renderLanguageOptions();
  }
}

function setTheme(theme) {
  app.theme = ['system', 'light', 'dark'].includes(theme) ? theme : 'system';
  setCookie('gree_controller_theme', app.theme);
  applyTheme();
}

async function api(path, options = {}) {
  const headers = new Headers(options.headers || {});
  headers.set('Accept', 'application/json');
  if (app.token) headers.set('Authorization', `Bearer ${app.token}`);
  let body = options.body;
  if (body !== undefined && body !== null && typeof body !== 'string') {
    headers.set('Content-Type', 'application/json');
    body = JSON.stringify(body);
  }
  const response = await fetch(withBase(path), {...options, headers, body});
  if (response.status === 401) {
    showTokenDialog();
    throw new Error(tr('auth.invalid'));
  }
  if (!response.ok) {
    let message = tr('error.http', {status: response.status});
    try { message = (await response.json()).error || message; } catch (_) {}
    throw new Error(message);
  }
  if (response.status === 204) return null;
  return response.json();
}

function toast(message, error = false) {
  const host = $('#toastStack'); if (!host) return;
  const item = document.createElement('div');
  item.className = `toast-item ${error ? 'error' : 'success'}`;
  item.innerHTML = `<span class="toast-icon">${error ? '!' : '✓'}</span><div class="toast-copy"><strong>${esc(error ? tr('toast.errorTitle') : tr('toast.successTitle'))}</strong><span>${esc(message)}</span></div><button class="toast-close" type="button" aria-label="Close">×</button><i class="toast-progress"></i>`;
  host.appendChild(item);
  requestAnimationFrame(() => item.classList.add('show'));
  const remove = () => { item.classList.remove('show'); item.classList.add('leaving'); setTimeout(() => item.remove(), 220); };
  item.querySelector('.toast-close').addEventListener('click', remove);
  item._timer = setTimeout(remove, error ? 5200 : 3600);
}

function showTokenDialog() {
  const dialog = $('#tokenDialog');
  if (!dialog.open) dialog.showModal();
}

async function loadBootstrap(showMessage = false) {
  if (app.loading) return;
  app.loading = true;
  try {
    const data = await api('/api/bootstrap');
    app.devices = data.devices || [];
    app.zones = data.zones || [];
    app.groups = data.groups || [];
    app.schedules = data.schedules || [];
    app.automations = data.automations || [];
    app.accessTokens = data.access_tokens || [];
    app.settings = data.settings || null;
    app.sensorAliases = {...(app.settings?.home_assistant?.sensor_aliases || {})};
    app.system = data.system || {};
    app.outdoorTemperature = Number.isFinite(Number(data.outdoor_temperature)) ? Number(data.outdoor_temperature) : null;
    renderAll();
    loadControlPlan();
    if (app.settings?.debug?.overlay_enabled) loadDebugBacklog();
    if (showMessage) toast(tr('common.updated'));
    if ($('#tokenDialog').open) $('#tokenDialog').close();
    connectWebSocket();
  } catch (error) {
    if (!String(error.message).toLowerCase().includes('token')) toast(error.message, true);
  } finally {
    app.loading = false;
  }
}

function renderAll() {
  renderSummary();
  renderHouseClimate();
  renderGroups();
  renderControlPlan();
  renderSimulationPage();
  renderDevices();
  renderZones();
  renderSchedules();
  renderAutomations();
  renderAccessTokens();
  fillSelects();
  renderSettings();
  renderNightSettings();
  renderHomeAssistantSettings();
  renderDebugOverlay();
}

function renderSummary() {
  const temperatures = app.devices.map(d => d.current_temperature).filter(Number.isFinite);
  const average = temperatures.length ? temperatures.reduce((a,b) => a+b, 0) / temperatures.length : null;
  const online = app.devices.filter(d => d.online).length;
  const active = app.devices.filter(d => d.power).length;
  const demand = app.zones.filter(z => z.enabled && z.demand).length;
  $('#heroTemperature').innerHTML = `${average === null ? '--' : average.toFixed(1)}<small>°C</small>`;
  const activeSuffix = active ? tr('dashboard.summaryActive', {count: active}) : '';
  $('#summaryText').textContent = app.devices.length
    ? tr('dashboard.summary', {online, total: app.devices.length, active: activeSuffix})
    : tr('dashboard.empty');
  $('#metrics').innerHTML = [
    [tr('dashboard.metricOnline'), `${online}/${app.devices.length}`],
    [tr('dashboard.metricActive'), active],
    [tr('dashboard.metricDemand'), demand],
  ].map(([label,value]) => `<div class="metric"><span>${esc(label)}</span><strong>${esc(value)}</strong></div>`).join('');
}

function renderHouseClimate() {
  const node = $('#houseClimate'); if (!node || !app.settings) return;
  const mode = app.settings.house_mode || 'cool';
  const zonePresets = (app.zones || []).map(zone => zone.manual_preset || 'auto');
  const preset = zonePresets.length && zonePresets.every(value => value === zonePresets[0]) ? zonePresets[0] : null;
  const outdoor = app.outdoorTemperature == null ? tr('common.unavailable') : fmtTemp(app.outdoorTemperature);
  const powerEnabled = app.settings.house_power_enabled !== false;
  const powerOn = $('#housePowerOn'), powerOff = $('#housePowerOff');
  if (powerOn) { powerOn.classList.toggle('active', powerEnabled); powerOn.setAttribute('aria-pressed', String(powerEnabled)); }
  if (powerOff) { powerOff.classList.toggle('active', !powerEnabled); powerOff.setAttribute('aria-pressed', String(!powerEnabled)); }
  node.innerHTML = `<div class="house-climate-head"><div><span class="eyebrow">${esc(tr('house.seasonMode'))}</span><h3>${esc(tr('house.smartThermostat'))}</h3><p>${esc(tr('house.setpointStrategy'))}</p></div><div class="outside-pill"><small>${esc(tr('house.outdoor'))}</small><strong>${esc(outdoor)}</strong></div></div>
    <div class="house-mode-row">
      <button class="${mode==='cool'?'active':''}" data-action="house-mode" data-value="cool" aria-pressed="${mode==='cool'}">${esc(tr('mode.cool'))}</button>
      <button class="${mode==='heat'?'active':''}" data-action="house-mode" data-value="heat" aria-pressed="${mode==='heat'}">${esc(tr('mode.heat'))}</button>
      <button class="${mode==='off'?'active':''}" data-action="house-mode" data-value="off" aria-pressed="${mode==='off'}">${esc(tr('house.noControl'))}</button>
    </div>
    <div class="preset-row house-preset-row">${['auto','comfort','sleep','away'].map(p=>`<button class="${preset===p?'active':''}" data-action="house-preset" data-value="${p}" aria-pressed="${preset===p}">${esc(p==='sleep'?tr('house.sleepAll'):p==='comfort'?tr('house.comfortAll'):p==='away'?tr('house.awayAll'):tr('house.autoAll'))}</button>`).join('')}</div>`;
}

function planEventMarkup(event) {
  const when = event?.at ? new Date(event.at).toLocaleString(locale(), {weekday:'short', hour:'2-digit', minute:'2-digit'}) : '—';
  const target = event?.target_temperature == null ? '' : ` · ${fmtTemp(event.target_temperature)}`;
  return `<li><time>${esc(when)}</time><span>${esc(event?.label || event?.kind || tr('plan.event'))}${esc(target)}</span></li>`;
}

function automationTriggerLabel(item) {
  if (item.trigger_kind === 'time') return tr('automations.triggerAt', {time: item.at_time || '—'});
  const key = item.trigger_kind === 'temperature_above' ? 'automations.triggerAbove' : 'automations.triggerBelow';
  return tr(key, {temperature: fmtTemp(item.threshold)});
}

function planZoneEffectiveEnabled(zone) {
  if (!zone) return undefined;
  return zone.effective_enabled ?? zone.enabled ?? false;
}

function renderControlPlan() {
  const host = $('#controlPlan'); if (!host) return;
  const plan = app.controlPlan;
  if (!plan) {
    host.innerHTML = `<div class="panel plan-loading">${esc(tr('plan.loading'))}</div>`;
    return;
  }

  const allZones = plan.zones || [];
  const houseEvents = (plan.next_events || []).slice(0, 3);
  const house = `<article class="panel plan-card plan-house"><div class="plan-card-head"><div><span class="eyebrow">${esc(tr('plan.house'))}</span><h3>${esc(houseModeLabel(plan.house_mode || 'off'))}</h3></div><span class="badge active">${esc(plan.control_strategy || 'setpoint')}</span></div><p>${esc(tr('plan.houseSummary', {zones:allZones.filter(planZoneEffectiveEnabled).length, demand:allZones.filter(zone=>planZoneEffectiveEnabled(zone) && zone.demand).length}))}</p><ul class="plan-events">${houseEvents.length ? houseEvents.map(planEventMarkup).join('') : `<li class="muted">${esc(tr('plan.noEvents'))}</li>`}</ul></article>`;

  const groupCards = (app.groups || []).map(group => {
    const memberIds = new Set(group.zone_ids || []);
    const members = allZones.filter(zone => memberIds.has(zone.zone_id));
    const state = groupState(group);
    const powerEnabled = group.power_enabled !== false;
    const demand = members.filter(zone => planZoneEffectiveEnabled(zone) && zone.demand).length;
    const mode = state.mode === 'house' ? tr('groups.followHouse') : state.mode === 'mixed' ? tr('groups.mixed') : modeLabel(state.mode);
    const preset = state.preset === 'mixed' ? tr('groups.mixed') : zonePresetLabel(state.preset);
    const events = members.flatMap(zone => (zone.next_events || []).map(event => ({...event, label:`${zone.zone_name}: ${event.label}`})))
      .sort((a,b) => new Date(a.at) - new Date(b.at)).slice(0, 2);
    return `<article class="panel plan-card plan-group ${powerEnabled ? '' : 'disabled'}"><div class="plan-card-head"><div><span class="eyebrow">${esc(tr('groups.group'))}</span><h3>${esc(group.name)}</h3></div><span class="badge ${powerEnabled ? 'active' : ''}">${esc(powerEnabled ? tr('common.on') : tr('common.off'))}</span></div><div class="plan-group-state"><strong>${esc(mode)}</strong><span>·</span><strong>${esc(preset)}</strong></div><p>${esc(tr('plan.groupSummary', {zones:members.length, demand}))}</p><ul class="plan-events">${events.length ? events.map(planEventMarkup).join('') : `<li class="muted">${esc(tr(powerEnabled ? 'plan.noEvents' : 'plan.groupOff'))}</li>`}</ul></article>`;
  }).join('');

  const zoneGroups = new Map();
  (app.groups || []).forEach(group => (group.zone_ids || []).forEach(zoneId => {
    const names = zoneGroups.get(zoneId) || [];
    names.push(group.name);
    zoneGroups.set(zoneId, names);
  }));
  const zones = allZones.map(zone => {
    const events = (zone.next_events || []).slice(0, 2);
    const target = zone.target_temperature == null ? '--' : Number(zone.target_temperature).toFixed(1);
    const groupNames = zoneGroups.get(zone.zone_id) || [];
    const scope = groupNames.length ? `${tr('groups.group')}: ${groupNames.join(' · ')}` : (zone.device_name || tr('common.noDevice'));
    const planState = zoneRuntimeStatusLabel(zone, zone.mode || 'off');
    return `<article class="panel plan-card plan-zone ${planZoneEffectiveEnabled(zone) ? '' : 'disabled'}"><div class="plan-card-head"><div><span class="eyebrow">${esc(scope)}</span><h3>${esc(zone.zone_name)}</h3></div><span class="badge ${zone.device_manual_override ? 'manual-override' : (planZoneEffectiveEnabled(zone) && zone.demand ? 'active' : '')}">${esc(planState)}</span></div><div class="plan-temp"><span>${fmtTemp(zone.current_temperature)}</span><b>→</b><strong>${esc(target)}<small>°C</small></strong></div><p>${esc(houseModeLabel(zone.mode || 'off'))} · ${esc(zonePresetLabel(zone.preset))}${zone.current_schedule_name ? ` · ${esc(zone.current_schedule_name)}` : ''}</p><ul class="plan-events">${events.length ? events.map(planEventMarkup).join('') : `<li class="muted">${esc(tr('plan.noEvents'))}</li>`}</ul></article>`;
  }).join('');

  const rules = (plan.rules || []).filter(rule => rule.enabled);
  const ruleCard = rules.length ? `<article class="panel plan-card plan-rules"><div class="plan-card-head"><div><span class="eyebrow">${esc(tr('plan.rules'))}</span><h3>${esc(tr('plan.ruleCount', {count:rules.length}))}</h3></div></div><ul class="plan-events">${rules.slice(0,3).map(rule=>`<li><time>${esc(automationTriggerLabel(rule))}</time><span>${esc(rule.name)} → ${esc(rule.action_group_name ? `${tr('groups.group')}: ${rule.action_group_name}` : (rule.action_device_name || ''))}</span></li>`).join('')}</ul></article>` : '';
  host.innerHTML = house + groupCards + zones + ruleCard;
}
async function loadControlPlan() {
  try { app.controlPlan = await api('/api/control-plan'); renderControlPlan(); renderSimulationPage(); }
  catch (error) { console.warn('Unable to load control plan:', error); }
}

function simulationTime(value, options = {}) {
  if (!value) return '—';
  const date = new Date(value);
  return date.toLocaleString(locale(), {weekday: options.withDay === false ? undefined : 'short', hour:'2-digit', minute:'2-digit'}).replace(',', '');
}

function simulationNumeric(value) {
  const n = Number(value);
  return Number.isFinite(n) ? n : null;
}

function simulationOutdoorAssist(mode, outdoor, room, target) {
  if (outdoor == null || room == null || target == null) return 0;
  const roomError = Math.abs(room - target);
  const weather = mode === 'heat' ? clamp((5 - outdoor) / 15, 0, 1) : clamp((outdoor - 30) / 10, 0, 1);
  return clamp(weather * clamp(roomError, 0, 2) * 0.5, 0, 1);
}

function simulationRoundDeviceSetpoint(mode, demand, value) {
  const safe = clamp(Number(value) || 0, 16, 30);
  if (mode === 'heat' && demand) return Math.ceil(safe);
  if (mode === 'heat' && !demand) return Math.floor(safe);
  if (mode !== 'heat' && demand) return Math.floor(safe);
  return Math.ceil(safe);
}

function simulationSmartFanSpeed(mode, room, target, outdoor, demand) {
  if (!demand) return 1;
  const error = Math.abs(room - target);
  const extremeWeather = mode === 'heat' ? outdoor != null && outdoor <= 0 : outdoor != null && outdoor >= 32;
  if (error >= 2 || extremeWeather) return 3;
  if (error >= 1) return 2;
  return 0;
}

function simulationStatusInfo(status) {
  const map = {
    disabled: {label: tr('common.disabled'), badge: ''},
    off: {label: tr('house.noControl'), badge: ''},
    waiting: {label: tr('simulation.waitingForData'), badge: ''},
    demand: {label: tr('simulation.stateDemand'), badge: 'active'},
    satisfied: {label: tr('simulation.stateSatisfied'), badge: ''},
  };
  return map[status] || {label: status, badge: ''};
}

function buildZoneSimulation(zone, planZone) {
  const device = app.devices.find(item => item.id === (planZone?.device_id || zone?.device_id));
  const mode = planZone?.mode || zone?.effective_mode || zone?.mode || app.settings?.house_mode || 'off';
  const current = simulationNumeric(planZone?.current_temperature ?? zone?.current_temperature ?? zone?.device_temperature ?? device?.current_temperature);
  const target = mode === 'off' ? null : simulationNumeric(planZone?.target_temperature ?? zone?.effective_setpoint ?? zone?.manual_setpoint ?? zone?.setpoint);
  const outdoor = simulationNumeric(app.outdoorTemperature ?? app.controlPlan?.outdoor_temperature);
  const hysteresis = Math.max(simulationNumeric(zone?.hysteresis) || 0.4, 0.1);
  const half = hysteresis / 2;
  let status = 'waiting';
  let demand = false;
  if (!zone?.enabled || planZoneEffectiveEnabled(planZone) === false) status = 'disabled';
  else if (mode === 'off') status = 'off';
  else if (current == null || target == null) status = 'waiting';
  else {
    if (mode === 'heat') {
      if (current <= target - half) demand = true;
      else if (current >= target + half) demand = false;
      else demand = !!zone?.demand;
    } else {
      if (current >= target + half) demand = true;
      else if (current <= target - half) demand = false;
      else demand = !!zone?.demand;
    }
    status = demand ? 'demand' : 'satisfied';
  }
  const standbyOffset = Math.max(simulationNumeric(zone?.standby_offset_c) || 0.5, 0.5);
  const assist = current == null || target == null ? 0 : simulationOutdoorAssist(mode, outdoor, current, target);
  const activeTarget = current == null || target == null ? null : (mode === 'heat' ? target + assist : target - assist);
  const standbyTarget = target == null ? null : (mode === 'heat' ? target - standbyOffset : target + standbyOffset);
  const desiredDeviceTarget = current == null || target == null ? null : simulationRoundDeviceSetpoint(mode, demand, demand ? activeTarget : standbyTarget);
  const nightActive = !!app.controlPlan?.night_mode_active;
  const nightMaxFan = clamp(Number(app.controlPlan?.night_mode_max_fan_speed || 1), 1, 5);
  let fanSpeed = simulationNumeric(device?.fan_speed);
  if (mode !== 'off') {
    fanSpeed = zone?.smart_fan && current != null && target != null ? simulationSmartFanSpeed(mode, current, target, outdoor, demand) : fanSpeed;
    if (nightActive) {
      if (zone?.smart_fan) fanSpeed = fanSpeed === 0 ? 1 : Math.min(fanSpeed ?? nightMaxFan, nightMaxFan);
      else if (fanSpeed === 0 || fanSpeed == null || fanSpeed > nightMaxFan) fanSpeed = nightMaxFan;
    }
  }
  const quiet = mode === 'off'
    ? tr('simulation.manual')
    : nightActive && app.settings?.night_mode?.force_quiet
      ? tr('simulation.quietIfSupported')
      : (zone?.smart_fan ? (!demand ? tr('simulation.quietIfSupported') : tr('common.off')) : tr('simulation.manual'));
  const nativeSleep = mode !== 'off' && nightActive && app.settings?.night_mode?.use_native_sleep && device?.supports_sleep === true;
  const reasoning = !zone?.enabled || planZoneEffectiveEnabled(planZone) === false
    ? tr('simulation.reasonDisabled')
    : mode === 'off'
      ? tr('simulation.reasonHouseOff')
      : current == null || target == null
        ? tr('simulation.reasonWaiting')
        : demand
          ? tr('simulation.reasonDemand', {mode: modeLabel(mode), target: target.toFixed(1), hysteresis: hysteresis.toFixed(1)})
          : tr('simulation.reasonSatisfied', {target: target.toFixed(1), standby: standbyTarget.toFixed(1)});
  return {device, mode, current, target, demand, status, outdoor, hysteresis, assist, activeTarget, standbyTarget, desiredDeviceTarget, fanSpeed, quiet, nativeSleep, reasoning};
}

function simulationRuleAction(rule) {
  const bits = [];
  if (rule.action?.power != null) bits.push(`${tr('common.power')}: ${rule.action.power ? tr('common.on') : tr('common.off')}`);
  if (rule.action?.mode) bits.push(`${tr('common.mode')}: ${rule.action_group_id && rule.action.mode === 'auto' ? tr('groups.followHouse') : modeLabel(rule.action.mode)}`);
  if (rule.action?.target_temperature != null) bits.push(`${tr('common.temperature')}: ${fmtTemp(rule.action.target_temperature)}`);
  if (rule.action_preset) bits.push(`${tr('groups.profile')}: ${zonePresetLabel(rule.action_preset)}`);
  return bits.length ? bits.join(' · ') : tr('simulation.noActionPreview');
}

function simulationGroupsForZone(zoneId) {
  return app.groups.filter(group => (group.zone_ids || []).includes(zoneId));
}

function renderSimulationScopeControls(plan) {
  const scope = $('#simulationScope');
  const target = $('#simulationTarget');
  if (!scope || !target) return;
  if (!['units','groups'].includes(app.simulationScope)) app.simulationScope = 'units';
  scope.value = app.simulationScope;
  const zones = plan?.zones || [];
  const options = app.simulationScope === 'groups'
    ? [{id:'all', name:tr('simulation.allGroups')}, ...app.groups.map(group => ({id:group.id, name:group.name}))]
    : [{id:'all', name:tr('simulation.allUnits')}, ...zones.map(zone => ({id:zone.zone_id, name:`${zone.zone_name} · ${zone.device_name || tr('common.device')}`}))];
  if (!options.some(option => option.id === app.simulationTarget)) app.simulationTarget = 'all';
  target.innerHTML = options.map(option => `<option value="${esc(option.id)}">${esc(option.name)}</option>`).join('');
  target.value = app.simulationTarget;
}

function simulationFilteredZones(plan) {
  const zones = plan?.zones || [];
  if (app.simulationScope === 'groups') {
    if (app.simulationTarget === 'all') {
      const grouped = new Set(app.groups.flatMap(group => group.zone_ids || []));
      return zones.filter(zone => grouped.has(zone.zone_id));
    }
    const group = app.groups.find(item => item.id === app.simulationTarget);
    const wanted = new Set(group?.zone_ids || []);
    return zones.filter(zone => wanted.has(zone.zone_id));
  }
  return app.simulationTarget === 'all' ? zones : zones.filter(zone => zone.zone_id === app.simulationTarget);
}

function simulationRuleVisible(rule, zones) {
  if (app.simulationTarget === 'all') return true;
  const zoneIds = new Set(zones.map(zone => zone.zone_id));
  const deviceIds = new Set(zones.map(zone => zone.device_id).filter(Boolean));
  if (app.simulationScope === 'groups') {
    if (rule.action_group_id === app.simulationTarget) return true;
    return deviceIds.has(rule.trigger_device_id) || deviceIds.has(rule.action_device_id);
  }
  const directZone = [...zoneIds][0];
  if (simulationGroupsForZone(directZone).some(group => group.id === rule.action_group_id)) return true;
  return deviceIds.has(rule.trigger_device_id) || deviceIds.has(rule.action_device_id);
}

function simulationLaneContext(planZone) {
  if (app.simulationScope !== 'groups') return planZone.device_name || '';
  const groups = simulationGroupsForZone(planZone.zone_id);
  return groups.length ? groups.map(group => group.name).join(' · ') : (planZone.device_name || '');
}

function updateSimulationUrl() {
  if (app.currentView !== 'simulation') return;
  const params = new URLSearchParams();
  if (app.standaloneSimulation) params.set('standalone', '1');
  if (app.simulationScope !== 'units') params.set('scope', app.simulationScope);
  if (app.simulationTarget !== 'all') params.set('target', app.simulationTarget);
  const query = params.toString();
  updateBrowserUrl(`/simulation${query ? `?${query}` : ''}`, true);
}

function renderSimulationPage() {
  const summaryHost = $('#simulationSummary');
  const timelineHost = $('#simulationTimeline');
  const boardHost = $('#simulationFlowBoard');
  const rulesHost = $('#simulationRules');
  if (!summaryHost || !timelineHost || !boardHost || !rulesHost) return;
  const plan = app.controlPlan;
  if (!plan) {
    summaryHost.innerHTML = `<div class="panel plan-loading">${esc(tr('plan.loading'))}</div>`;
    timelineHost.innerHTML = ''; boardHost.innerHTML = ''; rulesHost.innerHTML = '';
    return;
  }

  renderSimulationScopeControls(plan);
  const zones = simulationFilteredZones(plan);
  const enabledZones = zones.filter(zone => zone.enabled);
  const demandingZones = enabledZones.filter(zone => zone.demand);
  const nightOn = !!plan.night_mode_active;
  summaryHost.innerHTML = [
    {label: tr('simulation.houseMode'), value: houseModeLabel(plan.house_mode || 'off'), note: tr('simulation.strategy', {strategy: plan.control_strategy || 'setpoint'})},
    {label: tr('settings.nightMode'), value: nightOn ? tr('common.active') : (app.settings?.night_mode?.enabled ? tr('simulation.scheduled') : tr('common.disabled')), note: `${plan.night_mode_start || '22:00'} → ${plan.night_mode_end || '06:00'} · ${tr('simulation.fanMax')} ${fanLabel(plan.night_mode_max_fan_speed || 1)}`},
    {label: tr('simulation.outdoor'), value: plan.outdoor_temperature == null ? '—' : fmtTemp(plan.outdoor_temperature), note: tr('simulation.generatedAt', {time: dateTime(plan.generated_at)})},
    {label: tr('simulation.activeZones'), value: String(enabledZones.length), note: `${tr('simulation.requestingZones', {count: demandingZones.length})} · ${tr('simulation.rulesLabel')}: ${(plan.rules || []).filter(rule => rule.enabled && simulationRuleVisible(rule, zones)).length}`},
  ].map(card => `<article class="panel simulation-summary-card"><small>${esc(card.label)}</small><strong>${esc(card.value)}</strong><span>${esc(card.note)}</span></article>`).join('');

  const nodeW = 190, nodeH = 106, rowH = 190, topY = 155;
  const x = {sensor:45, thermostat:305, decision:565, unit:825, event:1085};
  const boardW = 1325, boardH = Math.max(390, topY + zones.length * rowH + 35);
  const nodes = [];
  const links = [];
  const pathBetween = (ax, ay, bx, by, cls='') => {
    const bend = Math.max(36, (bx - ax) * .45);
    return `<path class="flow-link ${cls}" d="M ${ax} ${ay} C ${ax+bend} ${ay}, ${bx-bend} ${by}, ${bx} ${by}"/>`;
  };
  const verticalLink = (ax, ay, bx, by, cls='bus') => `<path class="flow-link ${cls}" d="M ${ax} ${ay} C ${ax} ${ay+35}, ${bx} ${by-35}, ${bx} ${by}"/>`;
  const node = ({left, top, kind, eyebrow, title, value, meta='', badge='', badgeClass=''}) => `<article class="flow-node ${kind}" style="left:${left}px;top:${top}px;width:${nodeW}px;min-height:${nodeH}px"><div class="flow-node-top"><span>${esc(eyebrow)}</span>${badge ? `<b class="flow-node-badge ${badgeClass}">${esc(badge)}</b>` : ''}</div><h3>${esc(title)}</h3><strong>${esc(value)}</strong>${meta ? `<p>${esc(meta)}</p>` : ''}<i class="flow-port in"></i><i class="flow-port out"></i></article>`;

  const globalHouseLeft = 305, globalNightLeft = 565, globalTop = 28;
  nodes.push(node({left:globalHouseLeft,top:globalTop,kind:'logic global',eyebrow:tr('simulation.globalInput'),title:tr('simulation.houseMode'),value:houseModeLabel(plan.house_mode || 'off'),meta:tr('simulation.strategy',{strategy:plan.control_strategy || 'setpoint'}),badge:tr('simulation.house')}));
  nodes.push(node({left:globalNightLeft,top:globalTop,kind:`logic global ${nightOn?'night-active':''}`,eyebrow:tr('simulation.globalInput'),title:tr('settings.nightMode'),value:nightOn?tr('common.active'):(app.settings?.night_mode?.enabled?tr('simulation.scheduled'):tr('common.disabled')),meta:`${plan.night_mode_start || '22:00'} → ${plan.night_mode_end || '06:00'} · ${fanLabel(plan.night_mode_max_fan_speed || 1)}`,badge:nightOn?'☾':'○',badgeClass:nightOn?'active':''}));

  zones.forEach((planZone, index) => {
    const zone = app.zones.find(item => item.id === planZone.zone_id);
    const sim = buildZoneSimulation(zone, planZone);
    const status = simulationStatusInfo(sim.status);
    const y = topY + index * rowH;
    const mid = y + nodeH / 2;
    const next = (planZone.next_events || [])[0];
    const source = zoneControlSourceLabel(planZone.control_source);
    const sensorName = planZone.control_source === 'external' || planZone.control_source === 'combined'
      ? haSensorLabel(zone?.ha_entity_id || source)
      : (planZone.device_name || tr('common.device'));
    const fanText = sim.fanSpeed == null ? '—' : fanLabel(sim.fanSpeed);
    const quietText = sim.quiet;
    const command = sim.desiredDeviceTarget == null ? tr('simulation.noCommand') : `${fmtTemp(sim.desiredDeviceTarget)} · ${fanText}`;
    const eventValue = next ? simulationTime(next.at) : tr('simulation.noEventShort');
    const eventMeta = next ? `${next.label}${next.target_temperature == null ? '' : ` · ${fmtTemp(next.target_temperature)}`}` : tr('plan.noEvents');

    nodes.push(`<div class="flow-lane-label" style="top:${y-27}px"><strong>${esc(planZone.zone_name)}</strong><span>${esc(simulationLaneContext(planZone))}</span></div>`);
    nodes.push(node({left:x.sensor,top:y,kind:'input',eyebrow:tr('simulation.stepRoom'),title:sensorName,value:fmtTemp(sim.current),meta:source,badge:'●',badgeClass:sim.current == null?'':'active'}));
    nodes.push(node({left:x.thermostat,top:y,kind:'logic',eyebrow:tr('simulation.thermostat'),title:planZone.zone_name,value:sim.target == null?'—':fmtTemp(sim.target),meta:`${zonePresetLabel(planZone.preset)} · ${tr('simulation.hysteresis',{value:sim.hysteresis.toFixed(1)})}`,badge:houseModeLabel(sim.mode)}));
    nodes.push(node({left:x.decision,top:y,kind:`logic decision ${sim.demand?'demand':'satisfied'}`,eyebrow:tr('simulation.stepDecision'),title:status.label,value:sim.demand?tr('simulation.callForComfort'):tr('simulation.standby'),meta:sim.reasoning,badge:sim.demand?'▶':'✓',badgeClass:status.badge}));
    const sleepMeta = sim.nativeSleep ? ` · ${tr('devices.sleep')}: ${tr('common.on')}` : '';
    nodes.push(node({left:x.unit,top:y,kind:'action',eyebrow:tr('simulation.stepCommand'),title:planZone.device_name || tr('common.device'),value:command,meta:`${tr('devices.quiet')}: ${quietText}${sleepMeta}`,badge:sim.mode==='off'?tr('simulation.manual'):(sim.demand?'RUN':'IDLE'),badgeClass:sim.demand?'active':''}));
    nodes.push(node({left:x.event,top:y,kind:'event',eyebrow:tr('simulation.nextEvent'),title:eventValue,value:next?.preset ? zonePresetLabel(next.preset) : tr('simulation.schedule'),meta:eventMeta,badge:'›'}));

    links.push(pathBetween(x.sensor+nodeW,mid,x.thermostat,mid,'input-link'));
    links.push(pathBetween(x.thermostat+nodeW,mid,x.decision,mid,'logic-link'));
    links.push(pathBetween(x.decision+nodeW,mid,x.unit,mid,sim.demand?'active-link':'logic-link'));
    links.push(pathBetween(x.unit+nodeW,mid,x.event,mid,'action-link'));
    links.push(verticalLink(globalHouseLeft+nodeW/2,globalTop+nodeH,x.thermostat+nodeW/2,y,'bus'));
    if (app.settings?.night_mode?.enabled) links.push(verticalLink(globalNightLeft+nodeW/2,globalTop+nodeH,x.decision+nodeW/2,y,nightOn?'night-link':'bus'));
  });

  boardHost.style.width = `${boardW}px`;
  boardHost.style.height = `${boardH}px`;
  boardHost.innerHTML = `<svg class="flow-links" viewBox="0 0 ${boardW} ${boardH}" width="${boardW}" height="${boardH}" aria-hidden="true">${links.join('')}</svg>${nodes.join('')}`;

  const timelineItems = [];
  if (app.simulationTarget === 'all') (plan.next_events || []).forEach(event => timelineItems.push({scope: tr('simulation.house'), event}));
  zones.forEach(zone => (zone.next_events || []).forEach(event => timelineItems.push({scope: zone.zone_name, event, device: zone.device_name})));
  timelineItems.sort((a, b) => new Date(a.event.at) - new Date(b.event.at));
  const unique = [], seen = new Set();
  for (const item of timelineItems) {
    const key = `${item.scope}|${item.event.at}|${item.event.label}`;
    if (seen.has(key)) continue; seen.add(key); unique.push(item); if (unique.length >= 16) break;
  }
  timelineHost.innerHTML = unique.length ? unique.map(item => {
    const target = item.event.target_temperature == null ? '' : ` · ${fmtTemp(item.event.target_temperature)}`;
    return `<article class="simulation-timeline-item"><time>${esc(simulationTime(item.event.at))}</time><div><strong>${esc(item.scope)}</strong><p>${esc(item.event.label)}${esc(target)}${item.device ? ` · ${esc(item.device)}` : ''}</p></div></article>`;
  }).join('') : `<div class="empty">${esc(tr('plan.noEvents'))}</div>`;

  const activeRules = (plan.rules || []).filter(rule => rule.enabled && simulationRuleVisible(rule, zones));
  rulesHost.innerHTML = activeRules.length ? activeRules.map(rule => `<article class="panel simulation-rule-card"><div class="simulation-rule-head"><div><span class="eyebrow">${esc(tr('common.automation'))}</span><h3>${esc(rule.name)}</h3></div><span class="badge active">${esc(automationTriggerLabel(rule))}</span></div><p>${esc(tr('simulation.ruleOnDevice', {device: rule.action_device_name || tr('common.noDevice')}))}</p><div class="simulation-rule-action">${esc(simulationRuleAction(rule))}</div><div class="simulation-rule-meta"><small>${esc(tr('automations.last'))}: ${esc(dateTime(rule.last_fired_at))}</small><small>${esc(tr('simulation.nextReady'))}: ${esc(dateTime(rule.next_ready_at))}</small></div></article>`).join('') : `<div class="empty">${esc(tr('simulation.noRules'))}</div>`;
}

function scheduleControlPlanLoad() {
  clearTimeout(app.controlPlanTimer);
  app.controlPlanTimer = setTimeout(loadControlPlan, 180);
}

function deviceFeaturePanel(device) {
  const features = [
    ['light', 'supports_light', tr('devices.light')],
    ['xfan', 'supports_xfan', tr('devices.xfan')],
    ['health', 'supports_health', tr('devices.health')],
    ['air', 'supports_air', tr('devices.air')],
    ['sleep', 'supports_sleep', tr('devices.sleep')],
  ].filter(([, support]) => device[support] === true);
  if (!features.length) return `<div class="device-capability-panel"><small>${esc(tr('devices.features'))}</small><span class="muted">${esc(tr('devices.noExtraFeatures'))}</span></div>`;
  return `<div class="device-capability-panel"><small>${esc(tr('devices.features'))}</small><div class="device-capability-buttons">${features.map(([field,,label]) => `<button class="${device[field] ? 'active' : ''}" data-action="toggle" data-field="${field}" data-device="${esc(device.id)}">${esc(label)}</button>`).join('')}</div></div>`;
}

function deviceZoneDisabled(deviceId) {
  return app.zones.some(zone => zone.device_id === deviceId && zone.enabled === false);
}

function deviceCard(device, detailed = false) {
  const modes = ['auto','cool','dry','fan','heat'];
  const fans = [0,1,3,5];
  const hasResponseTime = device.response_time_ms !== null && device.response_time_ms !== undefined && Number.isFinite(Number(device.response_time_ms));
  const responseTime = hasResponseTime ? `${Math.max(0, Math.round(Number(device.response_time_ms)))} ms` : '— ms';
  const protocol = device.simulated ? tr('devices.simulator') : device.protocol_version === 2 ? 'V2 GCM' : device.protocol_version === 1 ? 'V1 ECB' : tr('devices.protocolAuto');
  const networkInfo = `<div class="device-network-info"><small>${esc(device.ip)} · ${esc(responseTime)} · ${esc(protocol)}</small>${device.last_error ? `<small class="device-network-error" title="${esc(device.last_error)}">${esc(device.last_error)}</small>` : ''}</div>`;
  const zoneLocked = !detailed && deviceZoneDisabled(device.id);
  const locked = zoneLocked ? ' disabled' : '';
  const quickClass = detailed ? '' : ' quick-control-card quick-device-control';
  const quickRow = detailed ? '' : ' quick-control-row';
  return `<article class="device-card${quickClass} ${device.power ? '' : 'off'}" data-device-card="${esc(device.id)}">
    <div class="device-head">
      <div class="device-title"><h3>${esc(device.name)}</h3><p><span class="status ${device.online ? 'online' : ''}">${esc(tr(device.online ? 'status.online' : 'status.offline'))}</span> · ${esc(device.model || device.mac)}</p></div>
      <button class="power-button ${device.power ? 'on' : ''}" data-action="power" data-device="${esc(device.id)}" aria-label="${esc(tr('devices.power'))}"${locked}>⏻</button>
    </div>
    <div class="temperature-control">
      <button data-action="temperature" data-delta="-1" data-device="${esc(device.id)}"${locked}>−</button>
      <div class="target-temp">${Number(device.target_temperature).toFixed(1)}<small>°C</small></div>
      <button data-action="temperature" data-delta="1" data-device="${esc(device.id)}"${locked}>+</button>
    </div>
    <div class="current-line">${esc(tr('devices.currentTemperature'))}: <strong>${fmtTemp(device.current_temperature)}</strong>${device.outdoor_temperature == null ? '' : ` · ${esc(tr('devices.outdoor'))} ${fmtTemp(device.outdoor_temperature)}`}</div>
    ${zoneLocked ? `<div class="field-note warning-note">${esc(tr('devices.disabledZoneTechnicalOnly'))}</div>` : ''}
    <div class="mode-row${quickRow}${detailed ? '' : ' quick-control-row-5'}">${modes.map(mode => `<button class="${device.mode === mode ? 'active' : ''}" data-action="mode" data-value="${mode}" data-device="${esc(device.id)}"${locked}>${esc(modeLabel(mode))}</button>`).join('')}</div>
    <div class="fan-row${quickRow}${detailed ? '' : ' quick-control-row-4'}">${fans.map(fan => `<button class="${Number(device.fan_speed) === fan ? 'active' : ''}" data-action="fan" data-value="${fan}" data-device="${esc(device.id)}"${locked}>${esc(fanLabel(fan))}</button>`).join('')}</div>
    <div class="device-toggles${quickRow}${detailed ? '' : ' quick-control-row-3'}">
      <button class="${device.swing_vertical ? 'active' : ''}" data-action="toggle" data-field="swing_vertical" data-device="${esc(device.id)}"${locked}>${esc(tr('devices.swing'))}</button>
      ${device.supports_quiet === false ? '' : `<button class="${device.quiet ? 'active' : ''}" data-action="toggle" data-field="quiet" data-device="${esc(device.id)}"${locked}>${esc(tr('devices.quiet'))}</button>`}
      ${device.supports_turbo === false ? '' : `<button class="${device.turbo ? 'active' : ''}" data-action="toggle" data-field="turbo" data-device="${esc(device.id)}"${locked}>${esc(tr('devices.turbo'))}</button>`}
    </div>
    ${detailed ? deviceFeaturePanel(device) : ''}
    ${detailed ? `<div class="card-footer">${networkInfo}<div class="card-menu"><button data-action="poll" data-device="${esc(device.id)}">${esc(tr('actions.read'))}</button><button data-action="rename-device" data-device="${esc(device.id)}">${esc(tr('devices.nameProtocol'))}</button>${device.simulated ? '' : `<button data-action="bind" data-device="${esc(device.id)}">${esc(tr('actions.bind'))}</button>`}<button class="danger" data-action="delete-device" data-device="${esc(device.id)}">${esc(tr('actions.delete'))}</button></div></div>` : ''}
  </article>`;
}

function renderDevices() {
  const empty = `<div class="empty"><strong>${esc(tr('devices.emptyTitle'))}</strong>${esc(tr('devices.emptyText'))}</div>`;
  $('#dashboardDevices').innerHTML = app.devices.length ? app.devices.map(d => deviceCard(d, false)).join('') : empty;
  $('#deviceList').innerHTML = app.devices.length ? app.devices.map(d => deviceCard(d, true)).join('') : empty;
  const dashboardCount = $('#dashboardDeviceCount');
  if (dashboardCount) dashboardCount.textContent = String(app.devices.length);
}

function zoneStrategyLabel(zone) {
  if (zone.sensor_source === 'combined') return tr('zones.combinedSource');
  if (zone.sensor_source === 'home_assistant') return tr('zones.externalSource');
  return tr('zones.greeSource');
}

function zoneControlSourceLabel(source) {
  return ({
    device: tr('zones.sourceDevice'),
    external: tr('zones.sourceExternal'),
    combined: tr('zones.sourceCombined'),
    device_fallback: tr('zones.sourceFallback'),
    device_discrepancy_fallback: tr('zones.sourceDiscrepancy'),
    unavailable: tr('zones.sourceUnavailable'),
  })[source] || source || tr('zones.sourceUnavailable');
}

function zonePresetLabel(preset) {
  const key = `preset.${preset || 'comfort'}`;
  return tr(key) === key ? (preset || 'comfort') : tr(key);
}

function zoneRuntimeStatusLabel(zone, effectiveMode) {
  if (zone.device_manual_override === true) return tr('zones.manualDeviceControl');
  if (!zone.enabled) return tr('common.disabled');
  if (zone.local_thermostat_power === false) return tr('zones.localThermostatOff');
  if ((effectiveMode || 'off') === 'off') return tr('zones.waiting');
  if (zone.current_temperature == null) return tr('zones.noMeasurement');
  return zone.demand ? tr('zones.requesting') : tr('zones.satisfied');
}

function zoneCard(zone, detailed = true) {
  const device = app.devices.find(d => d.id === zone.device_id);
  const state = zone.enabled ? tr('common.active') : tr('common.disabled');
  const sensorDetails = zone.sensor_source === 'device'
    ? `${tr('zones.greeTemp')}: ${fmtTemp(zone.device_temperature ?? device?.current_temperature)}`
    : `${tr('zones.greeTemp')}: ${fmtTemp(zone.device_temperature)} · ${tr('zones.externalTemp')}: ${fmtTemp(zone.external_temperature)} · ${tr('zones.usedSource')}: ${zoneControlSourceLabel(zone.control_temperature_source)}`;
  const roomTemperature = zone.current_temperature ?? zone.device_temperature ?? device?.current_temperature;
  const target = Number(zone.effective_setpoint ?? zone.setpoint);
  const manual = zone.manual_preset || 'auto';
  const displayPreset = zone.manual_preset || zone.active_preset || 'comfort';
  const mode = zone.inherit_house_mode ? 'house' : zone.mode;
  const effectiveMode = zone.effective_mode || (zone.inherit_house_mode ? (app.settings?.house_mode || 'off') : zone.mode) || 'off';
  const hasManualOverride = zone.manual_preset != null || zone.manual_setpoint != null;
  const deviceManualOverride = zone.device_manual_override === true;
  const localThermostatPower = zone.local_thermostat_power;
  const localThermostatOverride = localThermostatPower === true || localThermostatPower === false;
  const override = deviceManualOverride
    ? (zone.device_manual_override_until
        ? tr('zones.manualDeviceUntil', {time:new Date(zone.device_manual_override_until).toLocaleTimeString(locale(), {hour:'2-digit',minute:'2-digit'})})
        : tr('zones.manualDeviceNoBoundary'))
    : localThermostatOverride
      ? tr(localThermostatPower ? 'zones.localThermostatOn' : 'zones.localThermostatOff')
      : (zone.manual_override_until
          ? `${tr('zones.overrideUntil')} ${new Date(zone.manual_override_until).toLocaleTimeString(locale(), {hour:'2-digit',minute:'2-digit'})}`
          : (hasManualOverride ? tr('zones.manualNoBoundary') : tr('zones.scheduleControl')));
  const manualTakeover = deviceManualOverride
    ? `<div class="manual-override-panel"><div><strong>${esc(tr('zones.manualDeviceControl'))}</strong><p>${esc(tr('zones.manualDeviceDescription'))}</p></div><button type="button" data-action="zone-resume-automation" data-resume="device" data-id="${esc(zone.id)}">${esc(tr('zones.resumeAutomation'))}</button></div>`
    : localThermostatOverride
      ? `<div class="manual-override-panel local-thermostat-panel"><div><strong>${esc(tr('zones.localThermostatControl'))}</strong><p>${esc(tr(localThermostatPower ? 'zones.localThermostatOnDescription' : 'zones.localThermostatOffDescription'))}</p></div><button type="button" data-action="zone-resume-automation" data-resume="local" data-id="${esc(zone.id)}">${esc(tr('zones.resumeAutomation'))}</button></div>`
      : '';
  const localPowerDisabled = !device || device.enabled === false ? ' disabled' : '';
  const localRequestedOn = localThermostatPower === true ? true : (localThermostatPower === false ? false : !!device?.power);
  const localThermostatPowerControl = `<div class="zone-local-thermostat-power"><button type="button" class="zone-unit-power-toggle ${localRequestedOn ? 'active' : ''}" title="${esc(tr('zones.unitPowerLocalHint'))}" data-action="zone-device-power" data-id="${esc(zone.id)}" data-value="${localRequestedOn ? 'false' : 'true'}" aria-pressed="${localRequestedOn ? 'true' : 'false'}"${localPowerDisabled}>${esc(tr(localRequestedOn ? 'zones.turnThermostatOff' : 'zones.turnThermostatOn'))}</button></div>`;

  if (detailed) {
    const groupNames = (app.groups || []).filter(group => (group.zone_ids || []).includes(zone.id)).map(group => group.name);
    const groupText = groupNames.length ? groupNames.join(' · ') : tr('zones.noGroup');
    const policy = zone.inherit_house_mode ? tr('zones.followHouse') : tr(zone.mode === 'heat' ? 'zones.heatOnly' : 'zones.coolOnly');
    return `<article class="list-card zone-config-card ${zone.demand ? 'demanding' : ''} ${zone.enabled ? '' : 'zone-disabled'} ${deviceManualOverride ? 'manual-takeover' : ''}" data-zone-config="${esc(zone.id)}">
      <div class="list-card-head"><div><span class="eyebrow">${esc(tr('zones.configuration'))}</span><h3>${esc(zone.name)}</h3><p>${esc(device?.name || tr('common.noDevice'))} · ${esc(tr('groups.group'))}: ${esc(groupText)}</p></div><span class="badge ${zone.enabled ? 'active' : ''}">${esc(state)}</span></div>
      <div class="zone-config-status">
        <div class="zone-config-temperature"><small>${esc(tr('zones.currentStatus'))}</small><div><span>${fmtTemp(roomTemperature)}</span><b>→</b><strong>${Number.isFinite(target) ? `${target.toFixed(1)}°C` : '—'}</strong></div></div>
        <div class="zone-config-runtime"><span class="badge ${zone.enabled && zone.demand ? 'active' : ''}">${esc(zoneRuntimeStatusLabel(zone, effectiveMode))}</span><span>${esc(houseModeLabel(effectiveMode))} · ${esc(zonePresetLabel(displayPreset))}</span><small>${esc(override)}</small></div>
      </div>
      <div class="zone-config-grid">
        <div><small>${esc(tr('zones.modePolicy'))}</small><strong>${esc(policy)}</strong></div>
        <div><small>${esc(tr('zones.source'))}</small><strong>${esc(zoneStrategyLabel(zone))}</strong></div>
        <div><small>${esc(tr('zones.hysteresis'))}</small><strong>${Number(zone.hysteresis ?? 0.6).toFixed(1)}°C</strong></div>
        <div><small>${esc(tr('zones.smartFan'))}</small><strong>${esc(tr(zone.smart_fan === false ? 'common.off' : 'common.on'))}</strong></div>
      </div>
      <div class="sensor-detail">${esc(sensorDetails)}</div>
      ${manualTakeover}
      <div class="card-footer"><small>${esc(tr('zones.controlOnDashboard'))}</small><div class="card-menu"><button class="primary" data-action="zone-go-control" data-id="${esc(zone.id)}">${esc(tr('zones.controlNow'))}</button><button data-action="edit-zone" data-id="${esc(zone.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-zone" data-id="${esc(zone.id)}">${esc(tr('actions.delete'))}</button></div></div>
    </article>`;
  }

  return `<article class="list-card zone-thermostat quick-control-card quick-thermostat-control ${zone.demand ? 'demanding' : ''} ${zone.enabled ? '' : 'zone-disabled'} ${deviceManualOverride ? 'manual-takeover' : ''}" data-zone-card="${esc(zone.id)}">
    <div class="list-card-head"><div><h3>${esc(zone.name)}</h3><p>${esc(device?.name || tr('common.noDevice'))} · ${esc(zonePresetLabel(displayPreset))}</p></div><button type="button" class="zone-enable-toggle ${zone.enabled ? 'active' : ''}" data-action="zone-enabled" data-id="${esc(zone.id)}" data-value="${zone.enabled ? 'false' : 'true'}" aria-label="${esc(tr(zone.enabled ? 'zones.disable' : 'zones.enable'))}"><span>${zone.enabled ? '✓' : '○'}</span>${esc(state)}</button></div>
    ${localThermostatPowerControl}
    <div class="thermostat-main"><div><small>${esc(tr('zones.measurement'))}</small><strong>${fmtTemp(roomTemperature)}</strong></div><div class="temperature-control compact"><button data-action="zone-temperature" data-id="${esc(zone.id)}" data-delta="-0.5">−</button><div class="target-temp compact">${Number.isFinite(target)?target.toFixed(1):'--'}<small>°C</small></div><button data-action="zone-temperature" data-id="${esc(zone.id)}" data-delta="0.5">+</button></div><div><small>${esc(tr('zones.deviceTarget'))}</small><strong>${fmtTemp(zone.device_setpoint)}</strong></div></div>
    <div class="preset-row quick-control-row quick-control-row-4">
      ${['auto','comfort','sleep','away'].map(preset=>`<button class="${manual===preset?'active':''}" data-action="zone-preset" data-id="${esc(zone.id)}" data-value="${preset}">${esc(preset==='sleep'?tr('zones.sleepNow'):zonePresetLabel(preset))}</button>`).join('')}
    </div>
    <div class="mode-row zone-mode-row quick-control-row quick-control-row-3"><button class="${mode==='house'?'active':''}" data-action="zone-mode" data-id="${esc(zone.id)}" data-value="house">${esc(tr('zones.followHouseShort'))}</button><button class="${mode==='heat'?'active':''}" data-action="zone-mode" data-id="${esc(zone.id)}" data-value="heat">${esc(modeLabel('heat'))}</button><button class="${mode==='cool'?'active':''}" data-action="zone-mode" data-id="${esc(zone.id)}" data-value="cool">${esc(modeLabel('cool'))}</button></div>
    <div class="zone-state-line"><span>${esc(zoneRuntimeStatusLabel(zone, effectiveMode))}</span><span>${esc(override)}</span></div>
    ${manualTakeover}
  </article>`;
}

function renderZones() {
  const empty = `<div class="empty"><strong>${esc(tr('zones.emptyTitle'))}</strong>${esc(tr('zones.emptyText'))}</div>`;
  $('#zoneList').innerHTML = app.zones.length ? app.zones.map(zone => zoneCard(zone, true)).join('') : empty;
  const dashboard = $('#dashboardZones');
  if (dashboard) dashboard.innerHTML = app.zones.length ? app.zones.map(zone => zoneCard(zone, false)).join('') : empty;
  const dashboardCount = $('#dashboardZoneCount');
  if (dashboardCount) dashboardCount.textContent = String(app.zones.length);
}

function groupZones(group) {
  const wanted = new Set(group?.zone_ids || []);
  return app.zones.filter(zone => wanted.has(zone.id));
}

function groupState(group) {
  const zones = groupZones(group);
  const modes = [...new Set(zones.map(zone => zone.inherit_house_mode ? 'house' : (zone.mode || 'cool')))];
  const presets = [...new Set(zones.map(zone => zone.manual_preset || 'auto'))];
  return {
    zones,
    mode: modes.length === 1 ? modes[0] : (modes.length ? 'mixed' : 'house'),
    preset: presets.length === 1 ? presets[0] : (presets.length ? 'mixed' : 'auto'),
  };
}

function groupCard(group, detailed = false) {
  const state = groupState(group);
  const memberNames = state.zones.map(zone => zone.name);
  const memberText = memberNames.length ? memberNames.join(' · ') : tr('groups.noMembers');
  const powerEnabled = group.power_enabled !== false;
  const masterOff = app.settings?.house_power_enabled === false;
  const modeLabelForGroup = value => value === 'house' ? tr('groups.followHouse') : (value === 'mixed' ? tr('groups.mixed') : modeLabel(value));
  const presetLabelForGroup = value => value === 'mixed' ? tr('groups.mixed') : zonePresetLabel(value);
  return `<article class="list-card group-card ${powerEnabled ? '' : 'group-off'}">
    <div class="list-card-head"><div><span class="eyebrow">${esc(tr('groups.group'))}</span><h3>${esc(group.name)}</h3><p>${esc(memberText)}</p></div></div>
    ${detailed ? `<div class="group-state-summary"><div><small>${esc(tr('groups.mode'))}</small><strong>${esc(modeLabelForGroup(state.mode))}</strong></div><div><small>${esc(tr('groups.profile'))}</small><strong>${esc(presetLabelForGroup(state.preset))}</strong></div><div><small>${esc(tr('groups.members'))}</small><strong>${state.zones.length}</strong></div></div>` : ''}
    <div class="group-control-block"><small>${esc(tr('common.power'))}</small><div class="group-button-row"><button class="${powerEnabled ? 'active' : ''}" data-action="group-power" data-id="${esc(group.id)}" data-value="true">${esc(tr('common.on'))}</button><button class="${!powerEnabled ? 'active' : ''}" data-action="group-power" data-id="${esc(group.id)}" data-value="false">${esc(tr('common.off'))}</button></div></div>
    <div class="group-control-block"><small>${esc(tr('groups.mode'))}</small><div class="mode-row group-mode-row">${['house','heat','cool'].map(mode => `<button class="${state.mode === mode ? 'active' : ''}" data-action="group-mode" data-id="${esc(group.id)}" data-value="${mode}">${esc(mode === 'house' ? tr('groups.followHouse') : modeLabel(mode))}</button>`).join('')}</div></div>
    <div class="group-control-block"><small>${esc(tr('groups.profile'))}</small><div class="preset-row group-preset-row">${['auto','comfort','sleep','away'].map(preset => `<button class="${state.preset === preset ? 'active' : ''}" data-action="group-preset" data-id="${esc(group.id)}" data-value="${preset}">${esc(zonePresetLabel(preset))}</button>`).join('')}</div></div>
    ${masterOff ? `<p class="field-note warning-note">${esc(tr('groups.masterOff'))}</p>` : ''}
    ${detailed ? `<div class="card-footer"><small>${esc(tr('groups.memberCount', {count: state.zones.length}))}</small><div class="card-menu"><button data-action="edit-group" data-id="${esc(group.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-group" data-id="${esc(group.id)}">${esc(tr('actions.delete'))}</button></div></div>` : ''}
  </article>`;
}

function renderGroups() {
  const empty = `<div class="empty"><strong>${esc(tr('groups.emptyTitle'))}</strong>${esc(tr('groups.emptyText'))}</div>`;
  const dashboard = $('#dashboardGroups');
  if (dashboard) dashboard.innerHTML = app.groups.length ? app.groups.map(group => groupCard(group, false)).join('') : empty;
  const dashboardCount = $('#dashboardGroupCount');
  if (dashboardCount) dashboardCount.textContent = String(app.groups.length);
  const list = $('#groupList');
  if (list) list.innerHTML = app.groups.length ? app.groups.map(group => groupCard(group, true)).join('') : empty;
}

async function sendGroupControl(id, patch) {
  try {
    const result = await api(`/api/groups/${encodeURIComponent(id)}/control`, {method:'POST', body:patch});
    if (result.group) {
      const index = app.groups.findIndex(group => group.id === result.group.id);
      if (index >= 0) app.groups[index] = result.group; else app.groups.push(result.group);
    }
    (result.zones || []).forEach(zone => {
      const index = app.zones.findIndex(item => item.id === zone.id);
      if (index >= 0) app.zones[index] = zone; else app.zones.push(zone);
    });
    (result.devices || []).forEach(updateDevice);
    if (typeof result.master_power_enabled === 'boolean' && app.settings) app.settings.house_power_enabled = result.master_power_enabled;
    renderAll(); scheduleControlPlanLoad();
    const failed = Array.isArray(result.failed) ? result.failed.length : 0;
    if (failed) toast(tr('groups.partial', {count: failed}), true);
    else toast(tr('groups.controlUpdated'));
  } catch (error) { toast(error.message, true); }
}

function renderGroupZoneChoices(selectedIds = null) {
  const host = $('#groupZoneChoices'); if (!host) return;
  const selected = new Set(selectedIds || []);
  host.innerHTML = app.zones.length ? app.zones.map(zone => {
    const device = app.devices.find(item => item.id === zone.device_id);
    return `<label class="group-zone-choice"><input type="checkbox" name="zone_ids" value="${esc(zone.id)}" ${selected.has(zone.id) ? 'checked' : ''}><span><strong>${esc(zone.name)}</strong><small>${esc(device?.name || tr('common.noDevice'))}</small></span></label>`;
  }).join('') : `<div class="empty compact">${esc(tr('groups.noZones'))}</div>`;
}

function populateGroup(id) {
  const item = app.groups.find(group => group.id === id); if (!item) return;
  const form = $('#groupForm'); form.reset();
  form.elements.id.value = item.id;
  form.elements.name.value = item.name;
  renderGroupZoneChoices(item.zone_ids || []);
  openDialog('groupDialog');
}

function renderSchedules() {
  const dayNames = Array.from({length:7}, (_, index) => tr(`day.${index + 1}`));
  $('#scheduleList').innerHTML = app.schedules.length ? app.schedules.map(item => {
    const zone = app.zones.find(z => z.id === item.zone_id);
    const days = item.weekdays.map(day => dayNames[day-1]).join(', ');
    return `<article class="list-card"><div class="list-card-head"><div><h3>${esc(item.name)}</h3><p>${esc(zone?.name || tr('common.noZone'))} · ${esc(days)}</p></div><span class="badge ${item.enabled ? 'active' : ''}">${esc(item.enabled ? tr('common.enabled') : tr('common.disabled'))}</span></div>
      <div class="card-stats"><div class="card-stat"><small>${esc(tr('common.from'))}</small><strong>${esc(item.start_time)}</strong></div><div class="card-stat"><small>${esc(tr('common.to'))}</small><strong>${esc(item.end_time)}</strong></div><div class="card-stat"><small>${esc(tr('schedules.profile'))}</small><strong>${esc(item.preset === 'custom' ? fmtTemp(item.setpoint) : zonePresetLabel(item.preset))}</strong></div></div>
      <div class="card-footer"><small>${esc(tr('schedules.crossMidnight'))}</small><div class="card-menu"><button data-action="edit-schedule" data-id="${esc(item.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-schedule" data-id="${esc(item.id)}">${esc(tr('actions.delete'))}</button></div></div></article>`;
  }).join('') : `<div class="empty"><strong>${esc(tr('schedules.emptyTitle'))}</strong>${esc(tr('schedules.emptyText'))}</div>`;
}

function renderAutomations() {
  $('#automationList').innerHTML = app.automations.length ? app.automations.map(item => {
    const actionGroup = item.action_group_id ? app.groups.find(group => group.id === item.action_group_id) : null;
    const actionDevice = app.devices.find(device => device.id === item.action_device_id);
    const targetName = actionGroup?.name || actionDevice?.name || tr('common.noDevice');
    const mode = item.action.mode === 'auto' && actionGroup ? tr('groups.followHouse') : (item.action.mode ? modeLabel(item.action.mode) : '—');
    const preset = item.action_preset ? zonePresetLabel(item.action_preset) : '—';
    return `<article class="list-card"><div class="list-card-head"><div><h3>${esc(item.name)}</h3><p>${esc(tr('automations.triggerSummary', {trigger: automationTriggerLabel(item), device: targetName}))}</p></div><span class="badge ${item.enabled ? 'active' : ''}">${esc(item.enabled ? tr('common.active') : tr('common.disabled'))}</span></div>
      <div class="card-stats"><div class="card-stat"><small>${esc(tr('common.power'))}</small><strong>${item.action.power == null ? '—' : item.action.power ? tr('common.on') : tr('common.off')}</strong></div><div class="card-stat"><small>${esc(tr('common.mode'))}</small><strong>${esc(mode)}</strong></div><div class="card-stat"><small>${esc(tr('groups.profile'))}</small><strong>${esc(preset)}</strong></div><div class="card-stat"><small>${esc(tr('automations.last'))}</small><strong>${item.last_fired_at ? new Date(item.last_fired_at).toLocaleTimeString(locale(),{hour:'2-digit',minute:'2-digit'}) : '—'}</strong></div></div>
      <div class="card-footer"><small>${esc(actionGroup ? `${tr('groups.group')}: ${targetName}` : `${tr('common.device')}: ${targetName}`)} · ${esc(tr('common.cooldown'))} ${item.cooldown_seconds}s</small><div class="card-menu"><button data-action="edit-automation" data-id="${esc(item.id)}">${esc(tr('actions.edit'))}</button><button class="danger" data-action="delete-automation" data-id="${esc(item.id)}">${esc(tr('actions.delete'))}</button></div></div></article>`;
  }).join('') : `<div class="empty"><strong>${esc(tr('automations.emptyTitle'))}</strong>${esc(tr('automations.emptyText'))}</div>`;
}

function fillSelects() {
  const deviceOptions = app.devices.map(d => `<option value="${esc(d.id)}">${esc(d.name)}</option>`).join('');
  const zoneOptions = app.zones.map(z => `<option value="${esc(z.id)}">${esc(z.name)}</option>`).join('');
  const groupOptions = app.groups.map(g => `<option value="${esc(g.id)}">${esc(g.name)}</option>`).join('');
  ['#zoneForm [name=device_id]', '#automationForm [name=trigger_device_id]', '#automationForm [name=action_device_id]'].forEach(selector => {
    const select = $(selector); if (!select) return;
    const current = select.value; select.innerHTML = deviceOptions; if ([...select.options].some(o => o.value === current)) select.value = current;
  });
  const automationGroupSelect = $('#automationForm [name=action_group_id]');
  if (automationGroupSelect) { const currentGroup = automationGroupSelect.value; automationGroupSelect.innerHTML = groupOptions; if ([...automationGroupSelect.options].some(o => o.value === currentGroup)) automationGroupSelect.value = currentGroup; }
  const zoneSelect = $('#scheduleForm [name=zone_id]');
  if (zoneSelect) { const currentZone = zoneSelect.value; zoneSelect.innerHTML = zoneOptions; if ([...zoneSelect.options].some(o => o.value === currentZone)) zoneSelect.value = currentZone; }
  const presetZone = $('#schedulePresetZone');
  if (presetZone) { const currentZone = presetZone.value; presetZone.innerHTML = zoneOptions; if ([...presetZone.options].some(o => o.value === currentZone)) presetZone.value = currentZone; }
  const copyZone=$('#copyZoneSource');
  if(copyZone){
    const current=copyZone.value;
    const editingZoneId=$('#zoneForm')?.dataset.editingZoneId || '';
    const sources=app.zones.filter(zone=>zone.id!==editingZoneId);
    copyZone.innerHTML=`<option value="">${esc(tr('zones.copyFrom'))}</option>`+sources.map(z=>`<option value="${esc(z.id)}">${esc(z.name)}</option>`).join('');
    copyZone.value=[...copyZone.options].some(option=>option.value===current)?current:'';
  }
}

function renderAccessTokens() {
  const list = $('#accessTokenList');
  if (!list) return;
  list.innerHTML = app.accessTokens.length ? app.accessTokens.map(item => `
    <div class="token-row">
      <div><strong>${esc(item.name)}</strong><small class="mono">${esc(item.token_prefix)}</small><small>${esc(tr('settings.created'))}: ${esc(dateTime(item.created_at))}</small></div>
      <button type="button" class="danger" data-action="revoke-access-token" data-id="${esc(item.id)}">${esc(tr('actions.revoke'))}</button>
    </div>`).join('') : `<div class="empty compact"><strong>${esc(tr('settings.noTokens'))}</strong>${esc(tr('settings.noTokensHint'))}</div>`;
}

function knownHaEntities() {
  return [...new Set([
    ...Object.keys(app.sensorAliases || {}),
    ...app.zones.map(zone => zone.ha_entity_id).filter(Boolean),
    app.settings?.home_assistant?.default_entity_id,
    app.settings?.home_assistant?.outdoor_entity_id,
    ...app.historyData.sensors.map(row => row.entity_id),
  ].filter(Boolean))].sort();
}

function renderSensorAliases() {
  const host = $('#sensorAliasList'); if (!host) return;
  const entities = knownHaEntities();
  host.innerHTML = entities.length ? entities.map(entity => `<div class="sensor-alias-row"><span class="mono" title="${esc(entity)}">${esc(entity)}</span><input data-sensor-alias="${esc(entity)}" value="${esc(app.sensorAliases?.[entity] || '')}" placeholder="${esc(tr('settings.aliasPlaceholder'))}"><button type="button" class="sensor-alias-clear" data-clear-sensor-alias="${esc(entity)}" title="${esc(tr('actions.clear'))}">×</button></div>`).join('') : `<div class="empty compact">${esc(tr('settings.noSensorAliases'))}</div>`;
}

function renderLogRetention() {
  const select = $('#logRetentionDays'); if (!select || !app.settings) return;
  [...select.options].forEach(option => { option.textContent = `${option.value} ${tr('common.days')}`; });
  const days = String(app.settings.event_log_retention_days || 30);
  if (![...select.options].some(option => option.value === days)) {
    const option = document.createElement('option'); option.value = days; option.textContent = `${days} ${tr('common.days')}`; select.appendChild(option);
  }
  select.value = days;
}

function renderSettings() {
  if (!app.settings) return;
  const form = $('#settingsForm');
  if (!form) return;
  form.controller_id.value = app.settings.controller_id || '';
  form.poll_interval_seconds.value = app.settings.poll_interval_seconds || 15;
  form.zone_interval_seconds.value = app.settings.zone_interval_seconds || 5;
  form.discovery_broadcast.value = app.settings.discovery_broadcast || '255.255.255.255:7000';
  form.discovery_timeout_ms.value = app.settings.discovery_timeout_ms || 3000;
  form.simulator_enabled.checked = !!app.settings.simulator_enabled;
  form.history_retention_days.value = app.settings.history_retention_days || 30;
  form.event_log_retention_days.value = app.settings.event_log_retention_days || 30;
  form.history_compaction_enabled.checked = app.settings.history_compaction_enabled !== false;
  form.suppress_device_beep.checked = !!app.settings.suppress_device_beep;
  form.influx_enabled.checked = !!app.settings.influxdb?.enabled;
  form.influx_version.value = String(app.settings.influxdb?.version || '2');
  form.influx_threshold_days.value = app.settings.influxdb?.history_threshold_days || 30;
  form.influx_url.value = app.settings.influxdb?.url || '';
  form.influx_database.value = app.settings.influxdb?.database || 'gree_controller';
  form.influx_username.value = app.settings.influxdb?.username || '';
  form.influx_password.value = '';
  form.influx_password.placeholder = app.settings.influxdb?.password_configured ? tr('settings.secretSaved') : tr('settings.secretKeep');
  form.influx_org.value = app.settings.influxdb?.org || '';
  form.influx_bucket.value = app.settings.influxdb?.bucket || 'gree_controller';
  form.influx_token.value = '';
  form.influx_token.placeholder = app.settings.influxdb?.token_configured ? tr('settings.secretSaved') : tr('settings.secretKeep');
  form.debug_overlay_enabled.checked = !!app.settings.debug?.overlay_enabled;
  form.debug_gree_frames.checked = !!app.settings.debug?.gree_frames;
  const n=app.settings.notifications||{};
  form.notifications_enabled.checked=!!n.enabled; form.notifications_mode.value=n.mode||'problems'; form.notifications_provider.value=n.provider||'pushover';
  form.pushover_app_token.value=''; form.pushover_user_key.value=''; form.slack_webhook_url.value=''; form.discord_webhook_url.value='';
  form.pushover_app_token.placeholder=n.pushover_configured?'Saved - leave empty to keep':'Application token';
  form.pushover_user_key.placeholder=n.pushover_configured?'Saved - leave empty to keep':'User/group key';
  form.slack_webhook_url.placeholder=n.slack_configured?'Saved - leave empty to keep':'https://hooks.slack.com/services/…';
  form.discord_webhook_url.placeholder=n.discord_configured?'Saved - leave empty to keep':'https://discord.com/api/webhooks/…';
  form.notification_cooldown_seconds.value=n.cooldown_seconds||300; form.notification_failure_threshold.value=n.communication_failure_threshold||3; form.notification_target_timeout.value=n.target_timeout_minutes||60;
  updateNotificationFields();
  updateInfluxFields();
  renderLogRetention();
  $('#systemInfo').innerHTML = `<h3>${esc(tr('settings.systemState'))}</h3><div>${esc(tr('settings.version'))}: <strong>${esc(app.system.version || '—')}</strong></div><div>${esc(tr('settings.uptime'))}: <strong>${esc(formatDuration(app.system.uptime_seconds || 0))}</strong></div><div>${esc(tr('settings.apiAuth'))}: <strong>${esc(app.system.auth_required ? tr('settings.enabled') : tr('settings.disabled'))}</strong></div>`;
}

function renderNightSettings() {
  if (!app.settings) return;
  const form = $('#nightModeForm');
  if (!form) return;
  form.night_mode_enabled.checked = !!app.settings.night_mode?.enabled;
  form.night_mode_start.value = app.settings.night_mode?.start_time || '22:00';
  form.night_mode_end.value = app.settings.night_mode?.end_time || '06:00';
  form.night_mode_max_fan_speed.value = String(app.settings.night_mode?.max_fan_speed || 1);
  form.night_mode_force_quiet.checked = app.settings.night_mode?.force_quiet !== false;
  form.night_mode_native_sleep.checked = app.settings.night_mode?.use_native_sleep !== false;
}

function renderHomeAssistantSettings() {
  if (!app.settings) return;
  const form = $('#homeAssistantForm');
  if (!form) return;
  form.ha_url.value = app.settings.home_assistant?.url || '';
  form.ha_token.value = '';
  form.ha_token.placeholder = app.settings.home_assistant?.token_configured ? tr('settings.haTokenSaved') : tr('settings.haLongLivedToken');
  form.ha_entity_id.value = app.settings.home_assistant?.default_entity_id || '';
  form.ha_outdoor_entity_id.value = app.settings.home_assistant?.outdoor_entity_id || '';
  form.ha_allow_invalid_tls.checked = !!app.settings.home_assistant?.allow_invalid_tls;
  form.outdoor_assist_enabled.checked = !!app.settings.outdoor_assist_enabled;
  renderSensorAliases();
  renderAccessTokens();
}

function updateInfluxFields() {
  const version = $('#settingsForm [name=influx_version]')?.value || '2';
  $$('[data-influx-fields]').forEach(node => { node.hidden = node.dataset.influxFields !== version; });
}

function updateNotificationFields(){ const provider=$('#settingsForm [name=notifications_provider]')?.value||'pushover'; $$('[data-notification-provider]').forEach(n=>n.hidden=n.dataset.notificationProvider!==provider); }

function logCategory(kind=''){ const prefix=String(kind).split('.')[0]; return ['device','zone','automation','settings'].includes(prefix)?prefix:(['home_assistant','influx','notification'].includes(prefix)?'integration':'system'); }
function debugLine(source, kind, message, timestamp = new Date().toISOString(), data = null) {
  app.debugLines.push({source, kind, message, timestamp, data});
  if (app.debugLines.length > 160) app.debugLines.splice(0, app.debugLines.length - 160);
  renderDebugOverlay();
}

function renderDebugOverlay() {
  const overlay = $('#debugOverlay'); if (!overlay) return;
  const enabled = !!app.settings?.debug?.overlay_enabled;
  overlay.hidden = !enabled;
  if (!enabled) return;
  const status = $('#debugOverlayStatus');
  if (status) status.textContent = app.settings?.debug?.gree_frames ? tr('debug.apiAndGree') : tr('debug.apiOnly');
  const host = $('#debugOverlayLines'); if (!host) return;
  host.innerHTML = app.debugLines.length ? app.debugLines.slice(-120).map(line => {
    const details = line.data == null ? '' : ` ${typeof line.data === 'string' ? line.data : JSON.stringify(line.data)}`;
    return `<div class="debug-line"><time>${esc(new Date(line.timestamp).toLocaleTimeString(locale()))}</time><b>${esc(line.source)}</b><span>${esc(line.kind)}: ${esc(line.message || '')}${esc(details)}</span></div>`;
  }).join('') : `<div class="debug-empty">${esc(tr('debug.empty'))}</div>`;
  host.scrollTop = host.scrollHeight;
}

async function loadDebugBacklog() {
  if (app.debugBacklogLoaded || !app.settings?.debug?.overlay_enabled) return;
  try {
    const data = await api('/api/events?limit=60');
    app.debugLines = (data.events || []).reverse().map(item => ({source:'API', kind:item.kind, message:item.message, timestamp:item.timestamp, data:item.metadata})).slice(-120);
    app.debugBacklogLoaded = true;
    renderDebugOverlay();
  } catch (_) {}
}

function formatDuration(seconds) {
  const days = Math.floor(seconds / 86400), hours = Math.floor((seconds % 86400) / 3600), minutes = Math.floor((seconds % 3600) / 60);
  return `${days ? `${days}d ` : ''}${hours}h ${minutes}m`;
}

const VIEW_ROUTES = {dashboard:'/dashboard', devices:'/devices', zones:'/zones', groups:'/groups', schedules:'/schedules', automations:'/automations', simulation:'/simulation', night:'/night-mode', homeassistant:'/home-assistant', settings:'/settings', logs:'/events'};
const HISTORY_TABS = ['overview','zones','devices','sensors','custom'];

function currentHistoryPath() {
  const tab = HISTORY_TABS.includes(app.historyTab) ? app.historyTab : 'overview';
  const params = new URLSearchParams();
  const hours = $('#historyHours')?.value || new URLSearchParams(location.search).get('hours') || '24';
  if (hours !== '24') params.set('hours', hours);
  if (tab === 'zones' && app.historyZone !== 'all') params.set('zone', app.historyZone);
  if (tab === 'devices' && app.historyDevice !== 'all') params.set('device', app.historyDevice);
  if (tab === 'sensors' && app.historySensor !== 'all') params.set('sensor', app.historySensor);
  if (tab === 'custom' && app.customChartSeries.length) params.set('chart', encodeChartSpec(app.customChartSeries));
  const query = params.toString();
  return `/history/${tab}${query ? `?${query}` : ''}`;
}

function updateBrowserUrl(path, replace=false) {
  const target = `${APP_BASE}${path}` || path;
  const current = `${location.pathname}${location.search}`;
  if (current === target) return;
  history[replace ? 'replaceState' : 'pushState']({}, '', target);
}

function showView(name, {push=true, scroll=true}={}) {
  app.currentView = name;
  $$('.view').forEach(view => view.classList.toggle('active', view.dataset.view === name));
  $$('.bottom-nav button').forEach(button => button.classList.toggle('active', button.dataset.nav === name || (button.dataset.nav === 'more' && ['groups','schedules','automations','simulation','night','homeassistant','settings','logs'].includes(name))));
  if (push) updateBrowserUrl(name === 'history' ? currentHistoryPath() : (VIEW_ROUTES[name] || '/dashboard'));
  if (scroll) window.scrollTo({top: 0, behavior: 'smooth'});
  if (name === 'history') { renderHistoryNavigation(); loadHistory(); }
  if (name === 'logs') loadLogs();
}

function showHistoryTab(tab, {push=true, load=true}={}) {
  app.historyTab = HISTORY_TABS.includes(tab) ? tab : 'overview';
  renderHistoryNavigation();
  if (push) updateBrowserUrl(currentHistoryPath());
  if (load) loadHistory();
}

function applyRouteFromLocation() {
  const routePath = APP_BASE && location.pathname.startsWith(APP_BASE) ? location.pathname.slice(APP_BASE.length) : location.pathname;
  const parts = routePath.split('/').filter(Boolean);
  const first = parts[0] || 'dashboard';
  const params = new URLSearchParams(location.search);
  app.standaloneSimulation = first === 'simulation' && params.get('standalone') === '1';
  document.body.classList.toggle('simulation-standalone', app.standaloneSimulation);
  if (first === 'simulation') {
    app.simulationScope = ['units','groups'].includes(params.get('scope')) ? params.get('scope') : 'units';
    app.simulationTarget = params.get('target') || 'all';
  }
  if (first === 'history') {
    app.historyTab = HISTORY_TABS.includes(parts[1]) ? parts[1] : 'overview';
    app.historyZone = params.get('zone') || 'all';
    app.historyDevice = params.get('device') || 'all';
    app.historySensor = params.get('sensor') || 'all';
    const hours = params.get('hours');
    if (hours && ['6','24','168','720','2160','8760'].includes(hours) && $('#historyHours')) $('#historyHours').value = hours;
    if (app.historyTab === 'custom' && params.get('chart')) app.customChartSeries = decodeChartSpec(params.get('chart'));
    showView('history', {push:false, scroll:false});
    return;
  }
  const reverse = Object.entries(VIEW_ROUTES).find(([,path]) => path === `/${first}`);
  showView(reverse?.[0] || 'dashboard', {push:false, scroll:false});
}

async function sendDeviceCommand(id, command) {
  try {
    const device = await api(`/api/devices/${encodeURIComponent(id)}/command`, {method:'POST', body:command});
    updateDevice(device); renderAll();
  } catch (error) { toast(error.message, true); }
}

function updateDevice(device) {
  const index = app.devices.findIndex(item => item.id === device.id);
  if (index >= 0) app.devices[index] = device; else app.devices.push(device);
}

async function sendZoneLocalPower(id, power) {
  try {
    const zone = await api(`/api/zones/${encodeURIComponent(id)}/control`, {method:'POST', body:{power}});
    const index = app.zones.findIndex(item => item.id === zone.id);
    if (index >= 0) app.zones[index] = zone; else app.zones.push(zone);
    renderAll(); scheduleControlPlanLoad(); toast(tr('zones.localPowerUpdated'));
  } catch (error) { toast(error.message, true); }
}

async function sendZoneControl(id, patch) {
  const sequence = (app.zoneControlSeq[id] || 0) + 1;
  app.zoneControlSeq[id] = sequence;
  try {
    const zone = await api(`/api/zones/${encodeURIComponent(id)}/control`, {method:'POST', body:patch});
    if (app.zoneControlSeq[id] !== sequence) return;
    const index = app.zones.findIndex(item => item.id === zone.id);
    if (index >= 0) app.zones[index] = zone; else app.zones.push(zone);
    renderSummary(); renderZones(); scheduleControlPlanLoad();
  } catch (error) {
    if (app.zoneControlSeq[id] === sequence) { await loadBootstrap(); toast(error.message, true); }
  }
}

function queueZoneTemperature(zone, value) {
  const next = Math.round(clamp(value, 8, 30) * 2) / 2;
  zone.manual_setpoint = next;
  zone.setpoint = next;
  zone.effective_setpoint = next;
  renderZones();
  clearTimeout(app.zoneTemperatureTimers[zone.id]);
  app.zoneTemperatureTimers[zone.id] = setTimeout(() => sendZoneControl(zone.id, {setpoint: next}), 160);
}

function showDiscoveryNames(ids) {
  const wanted = new Set(Array.isArray(ids) ? ids : []);
  const devices = app.devices.filter(device => wanted.has(device.id));
  if (!devices.length) return;
  const list = $('#discoveryNamesList');
  list.innerHTML = devices.map(device => `
    <label class="discovery-name-row">
      <span><strong>${esc(device.model || 'GREE')}</strong><small>${esc(device.ip)} · ${esc(device.mac)} · ${device.protocol_version === 2 ? 'V2 GCM' : 'V1 ECB'}</small></span>
      <input data-device-id="${esc(device.id)}" maxlength="80" required value="${esc(device.name)}">
    </label>`).join('');
  openDialog('discoveryNamesDialog');
}

function populateDeviceRename(id) {
  const device = app.devices.find(item => item.id === id); if (!device) return;
  const form = $('#renameDeviceForm'); form.reset();
  form.id.value = device.id; form.name.value = device.name; form.protocol_version.value = String(device.protocol_version ?? 0);
  openDialog('renameDeviceDialog');
}

async function deleteEntity(type, id, labelKey) {
  if (!confirm(tr('confirm.delete', {label: tr(labelKey)}))) return;
  try { await api(`/api/${type}/${encodeURIComponent(id)}`, {method:'DELETE'}); await loadBootstrap(); toast(tr('common.removed')); }
  catch (error) { toast(error.message, true); }
}

function openDialog(id) {
  fillSelects();
  const dialog = document.getElementById(id);
  if (dialog && !dialog.open) dialog.showModal();
}

function updateZoneSensorFields() {
  const form = $('#zoneForm');
  if (!form) return;
  const external = form.sensor_source.value !== 'device';
  $('#externalSensorFields').hidden = !external;
  form.ha_entity_id.required = external;
}

function updateSchedulePresetField() {
  const form = $('#scheduleForm'); if (!form) return;
  $('#scheduleSetpointField').hidden = form.preset.value !== 'custom';
  form.setpoint.required = form.preset.value === 'custom';
}

function updateAutomationTargetFields() {
  const form = $('#automationForm'); if (!form) return;
  const groupTarget = form.action_target_kind.value === 'group';
  $('#automationDeviceTarget').hidden = groupTarget;
  $('#automationGroupTarget').hidden = !groupTarget;
  $('#automationGroupPreset').hidden = !groupTarget;
  $('#automationTargetTemperature').hidden = groupTarget;
  $('#automationGroupHint').hidden = !groupTarget;
  form.action_device_id.required = !groupTarget;
  form.action_group_id.required = groupTarget;
  form.action_target_temperature.disabled = groupTarget;
  if (groupTarget) form.action_target_temperature.value = '';
  [...form.action_mode.options].forEach(option => {
    if (!['dry','fan'].includes(option.value)) return;
    option.disabled = groupTarget;
    option.hidden = groupTarget;
  });
  if (groupTarget && ['dry','fan'].includes(form.action_mode.value)) form.action_mode.value = '';
}

function populateZone(id) {
  const item = app.zones.find(v => v.id === id); if (!item) return;
  const form = $('#zoneForm');
  form.reset();
  form.dataset.editingZoneId = item.id;
  form.elements.id.value = item.id;
  fillSelects();
  Object.entries(item).forEach(([key,value]) => { if (key !== 'id' && form.elements[key] && value != null && typeof value !== 'object') form.elements[key].value = value; });
  form.mode_policy.value = item.inherit_house_mode ? 'house' : (item.mode || 'cool');
  if (Number(item.profile_version || 0) === 0) {
    if ((item.mode || 'cool') === 'heat') form.heat_comfort_setpoint.value = Number(item.setpoint ?? 21);
    else form.cool_comfort_setpoint.value = Number(item.setpoint ?? 23);
  }
  form.external_sensor_weight_percent.value = Math.round(Number(item.external_sensor_weight ?? 0.4) * 100);
  form.max_sensor_difference.value = Number(item.max_sensor_difference ?? 3);
  form.min_adjust_seconds.value = Number(item.min_adjust_seconds ?? 120);
  form.standby_offset_c.value = Number(item.standby_offset_c ?? 2);
  form.smart_fan.checked = item.smart_fan !== false;
  form.enabled.checked = item.enabled; updateZoneSensorFields(); openDialog('zoneDialog');
}

function populateSchedule(id) {
  const item = app.schedules.find(v => v.id === id); if (!item) return;
  const form = $('#scheduleForm'); form.reset(); fillSelects();
  ['id','name','zone_id','start_time','end_time','setpoint','preset'].forEach(key => { if (form.elements[key] && item[key] != null) form.elements[key].value = item[key]; });
  form.enabled.checked = item.enabled;
  $$('[name=weekday]', form).forEach(input => input.checked = item.weekdays.includes(Number(input.value)));
  updateSchedulePresetField(); openDialog('scheduleDialog');
}

function populateAutomation(id) {
  const item = app.automations.find(v => v.id === id); if (!item) return;
  const form = $('#automationForm'); form.reset(); fillSelects();
  ['id','name','trigger_kind','trigger_device_id','threshold','at_time','action_device_id','cooldown_seconds'].forEach(key => { if (form.elements[key] && item[key] != null) form.elements[key].value = item[key]; });
  const groupTarget = !!item.action_group_id;
  form.action_target_kind.value = groupTarget ? 'group' : 'device';
  if (groupTarget) form.action_group_id.value = item.action_group_id;
  form.action_power.value = item.action.power == null ? '' : String(item.action.power);
  form.action_mode.value = item.action.mode || '';
  form.action_preset.value = item.action_preset || '';
  form.action_target_temperature.value = item.action.target_temperature ?? '';
  form.enabled.checked = item.enabled;
  updateAutomationTargetFields();
  openDialog('automationDialog');
}

function encodeChartSpec(series) {
  try {
    const raw = JSON.stringify(series || []);
    return btoa(raw).replace(/\+/g,'-').replace(/\//g,'_').replace(/=+$/,'');
  } catch (_) { return ''; }
}

function decodeChartSpec(encoded) {
  try {
    const padded = String(encoded || '').replace(/-/g,'+').replace(/_/g,'/').padEnd(Math.ceil(String(encoded || '').length / 4) * 4, '=');
    const value = JSON.parse(atob(padded));
    return Array.isArray(value) ? value.filter(item => typeof item === 'string').slice(0, 16) : [];
  } catch (_) { return []; }
}

function historyEntityOptions() {
  const zones = app.zones.map(zone => `<option value="${esc(zone.id)}">${esc(zone.name)}</option>`).join('');
  const devices = app.devices.map(device => `<option value="${esc(device.id)}">${esc(device.name)}</option>`).join('');
  const entities = [...new Set([
    ...app.historyData.sensors.map(row => row.entity_id),
    ...app.zones.map(zone => zone.ha_entity_id).filter(Boolean),
    app.settings?.home_assistant?.outdoor_entity_id,
  ].filter(Boolean))].sort();
  const sensors = entities.map(entity => `<option value="${esc(entity)}">${esc(haSensorLabel(entity))}</option>`).join('');
  return {zones, devices, sensors, entities};
}

function renderHistoryNavigation() {
  $$('#historyTabs [data-history-tab]').forEach(button => button.classList.toggle('active', button.dataset.historyTab === app.historyTab));
  const host = $('#historyContextControls'); if (!host) return;
  const options = historyEntityOptions();
  if (app.historyTab === 'zones') {
    host.innerHTML = `<label><span>${esc(tr('common.zone'))}</span><select id="historyZoneSelect"><option value="all">${esc(tr('history.allZones'))}</option>${options.zones}</select></label>`;
    const select=$('#historyZoneSelect'); if ([...select.options].some(option=>option.value===app.historyZone)) select.value=app.historyZone;
  } else if (app.historyTab === 'devices') {
    host.innerHTML = `<label><span>${esc(tr('common.device'))}</span><select id="historyDeviceSelect"><option value="all">${esc(tr('history.allDevices'))}</option>${options.devices}</select></label>`;
    const select=$('#historyDeviceSelect'); if ([...select.options].some(option=>option.value===app.historyDevice)) select.value=app.historyDevice;
  } else if (app.historyTab === 'sensors') {
    host.innerHTML = `<label><span>${esc(tr('history.haSensor'))}</span><select id="historySensorSelect"><option value="all">${esc(tr('history.allSensors'))}</option>${options.sensors}</select></label>`;
    const select=$('#historySensorSelect'); if ([...select.options].some(option=>option.value===app.historySensor)) select.value=app.historySensor;
  } else if (app.historyTab === 'custom') {
    host.innerHTML = `<span class="history-context-hint">${esc(tr('history.customHint'))}</span>`;
  } else {
    host.innerHTML = `<span class="history-context-hint">${esc(tr('history.overviewHint'))}</span>`;
  }
}

async function loadHistory() {
  if (app.historyLoading) return;
  app.historyLoading = true;
  const hours = $('#historyHours')?.value || '24';
  try {
    const data = await api(`/api/history?scope=overview&hours=${encodeURIComponent(hours)}&limit=20000`);
    app.historyData = {zones:data.zones || [], devices:data.devices || [], sensors:data.sensors || []};
    app.historyCounts = data.counts || {};
    renderHistoryNavigation();
    renderHistoryPage();
    if (app.currentView === 'history') updateBrowserUrl(currentHistoryPath(), true);
  } catch (error) {
    toast(error.message, true);
    renderHistoryPage();
  } finally { app.historyLoading = false; }
}

const HISTORY_COLORS = ['--accent','--info','--warning','--purple','--danger','--teal','--orange','--blue'];

function cssColor(name, fallback) {
  const value = getComputedStyle(document.documentElement).getPropertyValue(name).trim();
  return value || fallback;
}

function timeLabel(ts, hours) {
  const options = Number(hours) > 48 ? {day:'2-digit', month:'2-digit', hour:'2-digit'} : {hour:'2-digit', minute:'2-digit'};
  return new Date(ts).toLocaleString(locale(), options);
}

function prepareCanvas(canvas, height) {
  const rect = canvas.getBoundingClientRect();
  const width = Math.max(720, Math.floor(rect.width || 720));
  const dpr = window.devicePixelRatio || 1;
  canvas.width = width * dpr; canvas.height = height * dpr;
  canvas.style.width = `${width}px`; canvas.style.height = `${height}px`;
  const ctx = canvas.getContext('2d'); ctx.setTransform(dpr,0,0,dpr,0,0);
  ctx.clearRect(0,0,width,height);
  return {ctx,width,height};
}

function drawEmptyChart(canvas, height=340) {
  if (!canvas) return;
  const {ctx,width} = prepareCanvas(canvas,height);
  ctx.fillStyle = cssColor('--muted','#888'); ctx.font = '13px system-ui'; ctx.textAlign='center';
  ctx.fillText(tr('history.noData'), width/2, height/2);
}

function drawLineChart(canvas, series, rows, {height=340, minValue=null, maxValue=null, binaryLabels=false}={}) {
  if (!canvas || !rows.length || !series.length) return drawEmptyChart(canvas, height);
  const sortedRows = [...rows].sort((a,b)=>new Date(a.timestamp)-new Date(b.timestamp));
  const {ctx,width} = prepareCanvas(canvas,height);
  const text=cssColor('--muted','#888'), grid=cssColor('--grid','#333');
  const pad={left:54,right:20,top:20,bottom:42};
  const allValues=[];
  series.forEach(item => sortedRows.forEach(row => { const value=item.value(row); if(Number.isFinite(value)) allValues.push(value); }));
  if (!allValues.length) return drawEmptyChart(canvas,height);
  let min = minValue == null ? Math.floor(Math.min(...allValues)-1) : minValue;
  let max = maxValue == null ? Math.ceil(Math.max(...allValues)+1) : maxValue;
  if (max-min < 2) { min-=1; max+=1; }
  const firstTs = new Date(sortedRows[0].timestamp).getTime();
  const lastTs = new Date(sortedRows[sortedRows.length-1].timestamp).getTime();
  const span = Math.max(1,lastTs-firstTs);
  const x = row => pad.left + (new Date(row.timestamp).getTime()-firstTs)/span*(width-pad.left-pad.right);
  const y = value => pad.top + (max-value)/(max-min)*(height-pad.top-pad.bottom);
  ctx.font='10px system-ui'; ctx.fillStyle=text; ctx.strokeStyle=grid; ctx.lineWidth=1;
  for(let i=0;i<=5;i++){
    const value=min+(max-min)*i/5, py=y(value);
    ctx.beginPath();ctx.moveTo(pad.left,py);ctx.lineTo(width-pad.right,py);ctx.stroke();
    ctx.textAlign='right'; ctx.fillText(binaryLabels ? value.toFixed(0) : `${value.toFixed(1)}°`,pad.left-8,py+3);
  }
  const ticks=5;
  for(let i=0;i<=ticks;i++){
    const idx=Math.min(sortedRows.length-1,Math.round(i*(sortedRows.length-1)/ticks)); const px=x(sortedRows[idx]);
    ctx.textAlign='center'; ctx.fillText(timeLabel(sortedRows[idx].timestamp,$('#historyHours')?.value),px,height-14);
  }
  series.forEach(item => {
    ctx.beginPath(); ctx.strokeStyle=item.color; ctx.lineWidth=item.width||2; ctx.setLineDash(item.dash||[]);
    let started=false, prev=null;
    sortedRows.forEach(row => {
      const value=item.value(row); if(!Number.isFinite(value)) return;
      const px=x(row),py=y(value);
      if(!started||prev===null){ctx.moveTo(px,py);started=true;}
      else if(item.step){ctx.lineTo(px,y(prev));ctx.lineTo(px,py);} else ctx.lineTo(px,py);
      prev=value;
    });
    ctx.stroke(); ctx.setLineDash([]);
  });
}

function renderLegend(host, series) {
  if (!host) return;
  host.innerHTML=series.map(item=>`<span><i class="legend-line" style="--legend-color:${esc(item.color)}"></i>${esc(item.label)}</span>`).join('');
}

function historyChartMarkup(id, title, hint, compact=false) {
  return `<div class="panel chart-panel history-chart-card"><div class="chart-title-row"><div><h3>${esc(title)}</h3><p>${esc(hint || '')}</p></div></div><div class="chart-wrap ${compact?'compact-chart':''}"><canvas id="${esc(id)}" width="1000" height="${compact?300:420}"></canvas></div><div class="legend" id="${esc(id)}Legend"></div></div>`;
}

function historySeriesColor(index) {
  return cssColor(HISTORY_COLORS[index % HISTORY_COLORS.length], `hsl(${(index*67)%360} 68% 55%)`);
}

function renderHistorySummary() {
  const host=$('#historySummary'); if(!host) return;
  const deviceRows=app.historyData.devices, zoneRows=app.historyData.zones, sensorRows=app.historyData.sensors;
  const cards=[
    [tr('history.deviceSamples'), app.historyCounts.devices ?? deviceRows.length, tr('history.greeHistory')],
    [tr('history.zoneSamples'), app.historyCounts.zones ?? zoneRows.length, tr('history.zoneHistory')],
    [tr('history.haSamples'), app.historyCounts.ha ?? sensorRows.length, tr('history.haHistory')],
  ];
  host.innerHTML=cards.map(([label,value,detail])=>`<div class="history-stat"><small>${esc(label)}</small><strong>${esc(value)}</strong><span>${esc(detail)}</span></div>`).join('');
}

function renderOverviewHistory() {
  const host=$('#historyCharts');
  host.innerHTML = historyChartMarkup('overviewIndoorChart',tr('history.allGreeIndoor'),tr('history.allGreeIndoorHint'))
    + historyChartMarkup('overviewOutdoorChart',tr('history.allOutdoor'),tr('history.allOutdoorHint'))
    + historyChartMarkup('overviewZonesChart',tr('history.allZoneControl'),tr('history.allZoneControlHint'));

  const deviceRows=app.historyData.devices;
  const indoorSeries=app.devices.map((device,index)=>({label:device.name,color:historySeriesColor(index),value:row=>!row.zone_id&&!row.entity_id&&row.device_id===device.id?historyNumber(row.indoor_temperature):NaN}));
  drawLineChart($('#overviewIndoorChart'),indoorSeries,deviceRows,{height:360}); renderLegend($('#overviewIndoorChartLegend'),indoorSeries);

  const outdoorDeviceSeries=app.devices.filter(device=>deviceRows.some(row=>row.device_id===device.id&&Number.isFinite(historyNumber(row.outdoor_temperature)))).map((device,index)=>({label:`${device.name} · ${tr('history.greeOutdoor')}`,color:historySeriesColor(index),value:row=>!row.zone_id&&!row.entity_id&&row.device_id===device.id?historyNumber(row.outdoor_temperature):NaN}));
  const outdoorEntities=[...new Set(app.historyData.sensors.filter(row=>row.kind==='outdoor').map(row=>row.entity_id))];
  const outdoorHaSeries=outdoorEntities.map((entity,index)=>({label:`HA · ${haSensorLabel(entity)}`,color:historySeriesColor(index+outdoorDeviceSeries.length),dash:[6,4],value:row=>row.entity_id===entity?historyNumber(row.temperature):NaN}));
  const outdoorRows=[...deviceRows,...app.historyData.sensors.filter(row=>row.kind==='outdoor')];
  const outdoorSeries=[...outdoorDeviceSeries,...outdoorHaSeries];
  drawLineChart($('#overviewOutdoorChart'),outdoorSeries,outdoorRows,{height:320}); renderLegend($('#overviewOutdoorChartLegend'),outdoorSeries);

  const zoneRows=app.historyData.zones;
  const zoneSeries=app.zones.map((zone,index)=>({label:zone.name,color:historySeriesColor(index),value:row=>row.zone_id===zone.id?historyNumber(row.control_temperature):NaN}));
  drawLineChart($('#overviewZonesChart'),zoneSeries,zoneRows,{height:340}); renderLegend($('#overviewZonesChartLegend'),zoneSeries);
}

function renderZoneHistory() {
  const selected=app.historyZone;
  const rows=selected==='all'?app.historyData.zones:app.historyData.zones.filter(row=>row.zone_id===selected);
  const host=$('#historyCharts');
  host.innerHTML=historyChartMarkup('zoneTemperatureChart',tr('history.temperatureOverview'),tr('history.temperatureOverviewHint'))+historyChartMarkup('zoneOperationChart',tr('history.operationOverview'),tr('history.operationOverviewHint'),true);
  if(selected==='all'){
    const series=app.zones.map((zone,index)=>({label:zone.name,color:historySeriesColor(index),value:row=>row.zone_id===zone.id?historyNumber(row.control_temperature):NaN}));
    drawLineChart($('#zoneTemperatureChart'),series,rows,{height:360}); renderLegend($('#zoneTemperatureChartLegend'),series);
    const targets=app.zones.map((zone,index)=>({label:`${zone.name} · ${tr('history.targetShort')}`,color:historySeriesColor(index),dash:[5,4],value:row=>row.zone_id===zone.id?historyNumber(row.target_temperature):NaN}));
    drawLineChart($('#zoneOperationChart'),targets,rows,{height:260}); renderLegend($('#zoneOperationChartLegend'),targets);
    return;
  }
  const temperatureSeries=[
    {label:tr('history.greeSensor'),color:cssColor('--accent','#3ecf8e'),value:row=>historyNumber(row.gree_temperature)},
    {label:tr('history.roomSensor'),color:cssColor('--info','#60a5fa'),value:row=>historyNumber(row.external_temperature)},
    {label:tr('history.controlTemperature'),color:cssColor('--teal','#2dd4bf'),width:2.8,value:row=>historyNumber(row.control_temperature)},
    {label:tr('history.comfortTarget'),color:cssColor('--warning','#f59e0b'),dash:[7,5],value:row=>historyNumber(row.target_temperature)},
    {label:tr('history.deviceSetpoint'),color:cssColor('--purple','#a78bfa'),dash:[3,4],value:row=>historyNumber(row.device_setpoint)},
    {label:tr('history.outdoorTemperature'),color:cssColor('--muted-strong','#9ca3af'),dash:[2,5],value:row=>historyNumber(row.outdoor_temperature)},
  ];
  drawLineChart($('#zoneTemperatureChart'),temperatureSeries,rows,{height:360}); renderLegend($('#zoneTemperatureChartLegend'),temperatureSeries);
  const operationSeries=[
    {label:tr('history.fanSpeed'),color:cssColor('--info','#60a5fa'),step:true,value:row=>historyNumber(row.fan_speed)},
    {label:tr('history.demand'),color:cssColor('--accent','#3ecf8e'),step:true,width:2.4,value:row=>row.demand?4.5:0.5},
    {label:tr('history.power'),color:cssColor('--warning','#f59e0b'),step:true,dash:[5,4],value:row=>row.power?3.5:0.5},
  ];
  drawLineChart($('#zoneOperationChart'),operationSeries,rows,{height:260,minValue:0,maxValue:5,binaryLabels:true}); renderLegend($('#zoneOperationChartLegend'),operationSeries);
}

function renderDeviceHistory() {
  const selected=app.historyDevice;
  const rows=selected==='all'?app.historyData.devices:app.historyData.devices.filter(row=>row.device_id===selected);
  const host=$('#historyCharts');
  host.innerHTML=historyChartMarkup('deviceIndoorChart',tr('history.deviceIndoor'),tr('history.deviceIndoorHint'))+historyChartMarkup('deviceOutdoorChart',tr('history.deviceOutdoor'),tr('history.deviceOutdoorHint'))+historyChartMarkup('deviceTargetChart',tr('history.deviceTargets'),tr('history.deviceTargetsHint'),true);
  const devices=selected==='all'?app.devices:app.devices.filter(device=>device.id===selected);
  const indoor=devices.map((device,index)=>({label:device.name,color:historySeriesColor(index),value:row=>row.device_id===device.id?historyNumber(row.indoor_temperature):NaN}));
  const outdoor=devices.filter(device=>rows.some(row=>row.device_id===device.id&&Number.isFinite(historyNumber(row.outdoor_temperature)))).map((device,index)=>({label:device.name,color:historySeriesColor(index),value:row=>row.device_id===device.id?historyNumber(row.outdoor_temperature):NaN}));
  const targets=devices.map((device,index)=>({label:device.name,color:historySeriesColor(index),dash:[6,4],value:row=>row.device_id===device.id?historyNumber(row.target_temperature):NaN}));
  drawLineChart($('#deviceIndoorChart'),indoor,rows,{height:350}); renderLegend($('#deviceIndoorChartLegend'),indoor);
  drawLineChart($('#deviceOutdoorChart'),outdoor,rows,{height:310}); renderLegend($('#deviceOutdoorChartLegend'),outdoor);
  drawLineChart($('#deviceTargetChart'),targets,rows,{height:260}); renderLegend($('#deviceTargetChartLegend'),targets);
}

function renderSensorHistory() {
  const selected=app.historySensor;
  const rows=selected==='all'?app.historyData.sensors:app.historyData.sensors.filter(row=>row.entity_id===selected);
  const entities=[...new Set(rows.map(row=>row.entity_id))];
  const host=$('#historyCharts');
  host.innerHTML=historyChartMarkup('haSensorsChart',tr('history.haSensors'),tr('history.haSensorsHint'));
  const series=entities.map((entity,index)=>({label:haSensorLabel(entity),color:historySeriesColor(index),dash:rows.some(row=>row.entity_id===entity&&row.kind==='outdoor')?[6,4]:[],value:row=>row.entity_id===entity?historyNumber(row.temperature):NaN}));
  drawLineChart($('#haSensorsChart'),series,rows,{height:370}); renderLegend($('#haSensorsChartLegend'),series);
}

function customSeriesOptions() {
  const items=[];
  app.devices.forEach(device=>{
    items.push([`device|${device.id}|indoor`,`${device.name} · ${tr('history.indoorTemperature')}`]);
    items.push([`device|${device.id}|outdoor`,`${device.name} · ${tr('history.greeOutdoor')}`]);
    items.push([`device|${device.id}|target`,`${device.name} · ${tr('history.deviceTarget')}`]);
  });
  app.zones.forEach(zone=>{
    items.push([`zone|${zone.id}|control`,`${zone.name} · ${tr('history.controlTemperature')}`]);
    items.push([`zone|${zone.id}|gree`,`${zone.name} · ${tr('history.greeSensor')}`]);
    items.push([`zone|${zone.id}|external`,`${zone.name} · ${tr('history.roomSensor')}`]);
    items.push([`zone|${zone.id}|target`,`${zone.name} · ${tr('history.comfortTarget')}`]);
    items.push([`zone|${zone.id}|device_target`,`${zone.name} · ${tr('history.deviceSetpoint')}`]);
    items.push([`zone|${zone.id}|outdoor`,`${zone.name} · ${tr('history.outdoorTemperature')}`]);
  });
  [...new Set(app.historyData.sensors.map(row=>row.entity_id))].forEach(entity=>items.push([`ha|${entity}|temperature`,`HA · ${haSensorLabel(entity)}`]));
  return items;
}

function customSeriesDefinition(key,index=0) {
  const [kind,id,field]=String(key).split('|');
  const color=historySeriesColor(index);
  if(kind==='device'){
    const device=app.devices.find(item=>item.id===id); if(!device) return null;
    const labels={indoor:tr('history.indoorTemperature'),outdoor:tr('history.greeOutdoor'),target:tr('history.deviceTarget')};
    const fields={indoor:'indoor_temperature',outdoor:'outdoor_temperature',target:'target_temperature'};
    return {key,label:`${device.name} · ${labels[field]||field}`,color,dash:field==='target'?[6,4]:[],value:row=>!row.zone_id&&!row.entity_id&&row.device_id===id?historyNumber(row[fields[field]]):NaN};
  }
  if(kind==='zone'){
    const zone=app.zones.find(item=>item.id===id); if(!zone) return null;
    const fields={control:['control_temperature',tr('history.controlTemperature')],gree:['gree_temperature',tr('history.greeSensor')],external:['external_temperature',tr('history.roomSensor')],target:['target_temperature',tr('history.comfortTarget')],device_target:['device_setpoint',tr('history.deviceSetpoint')],outdoor:['outdoor_temperature',tr('history.outdoorTemperature')]};
    const info=fields[field]; if(!info) return null;
    return {key,label:`${zone.name} · ${info[1]}`,color,dash:['target','device_target','outdoor'].includes(field)?[6,4]:[],value:row=>row.zone_id===id?historyNumber(row[info[0]]):NaN};
  }
  if(kind==='ha') return {key,label:`HA · ${haSensorLabel(id)}`,color,dash:[3,4],value:row=>row.entity_id===id?historyNumber(row.temperature):NaN};
  return null;
}

function persistSavedCharts() {
  localStorage.setItem('gree_controller_saved_charts',JSON.stringify(app.savedCharts.slice(0,30)));
}

function renderCustomBuilder() {
  const host=$('#historyCustomBuilder'); if(!host) return;
  if(app.historyTab!=='custom'){host.innerHTML='';host.classList.remove('active');return;}
  host.classList.add('active');
  const options=customSeriesOptions();
  const selected=app.customChartSeries.map((key,index)=>customSeriesDefinition(key,index)).filter(Boolean);
  host.innerHTML=`<div class="panel custom-chart-panel"><div class="chart-title-row"><div><h3>${esc(tr('history.customTitle'))}</h3><p>${esc(tr('history.customDescription'))}</p></div></div>
    <div class="custom-chart-add"><select id="customSeriesSelect">${options.map(([value,label])=>`<option value="${esc(value)}">${esc(label)}</option>`).join('')}</select><button class="secondary" data-history-action="add-series">${esc(tr('history.addSeries'))}</button></div>
    <div class="custom-series-list">${selected.length?selected.map((item,index)=>`<span class="custom-series-chip"><i style="--chip-color:${esc(item.color)}"></i>${esc(item.label)}<button data-history-action="remove-series" data-index="${index}" aria-label="Remove">×</button></span>`).join(''):`<span class="field-note">${esc(tr('history.noCustomSeries'))}</span>`}</div>
    <div class="custom-chart-save"><input id="customChartName" placeholder="${esc(tr('history.chartName'))}"><button class="secondary" data-history-action="save-chart">${esc(tr('actions.save'))}</button><button class="primary" data-history-action="copy-chart-link">${esc(tr('history.copyLink'))}</button></div>
    <div class="saved-chart-list">${app.savedCharts.length?app.savedCharts.map(item=>`<div class="saved-chart-row"><button data-history-action="load-chart" data-id="${esc(item.id)}"><strong>${esc(item.name)}</strong><small>${esc(item.series.length)} ${esc(tr('history.series'))}</small></button><button class="danger" data-history-action="delete-chart" data-id="${esc(item.id)}">×</button></div>`).join(''):`<span class="field-note">${esc(tr('history.noSavedCharts'))}</span>`}</div>
  </div>`;
}

function renderCustomHistory() {
  renderCustomBuilder();
  const host=$('#historyCharts');
  host.innerHTML=historyChartMarkup('customHistoryChart',tr('history.customChart'),tr('history.customChartHint'));
  const series=app.customChartSeries.map((key,index)=>customSeriesDefinition(key,index)).filter(Boolean);
  const rows=[...app.historyData.devices,...app.historyData.zones,...app.historyData.sensors];
  drawLineChart($('#customHistoryChart'),series,rows,{height:390}); renderLegend($('#customHistoryChartLegend'),series);
}

function renderHistoryPage() {
  renderHistorySummary();
  renderCustomBuilder();
  if(app.historyTab==='overview') renderOverviewHistory();
  else if(app.historyTab==='zones') renderZoneHistory();
  else if(app.historyTab==='devices') renderDeviceHistory();
  else if(app.historyTab==='sensors') renderSensorHistory();
  else renderCustomHistory();
}

function drawCurrentChartIfVisible() {
  if (app.currentView === 'history') renderHistoryPage();
}

async function handleHistoryAction(button) {
  const action=button.dataset.historyAction;
  if(action==='add-series'){
    const value=$('#customSeriesSelect')?.value;
    if(value && !app.customChartSeries.includes(value)) app.customChartSeries.push(value);
    renderCustomHistory(); updateBrowserUrl(currentHistoryPath(), true); return;
  }
  if(action==='remove-series'){
    app.customChartSeries.splice(Number(button.dataset.index),1);
    renderCustomHistory(); updateBrowserUrl(currentHistoryPath(), true); return;
  }
  if(action==='save-chart'){
    if(!app.customChartSeries.length) return toast(tr('history.noCustomSeries'), true);
    const name=$('#customChartName')?.value.trim() || tr('history.customChart');
    const item={id:`chart-${Date.now()}`,name,series:[...app.customChartSeries],hours:$('#historyHours')?.value||'24'};
    app.savedCharts.unshift(item); persistSavedCharts(); renderCustomHistory(); toast(tr('history.chartSaved')); return;
  }
  if(action==='load-chart'){
    const item=app.savedCharts.find(entry=>entry.id===button.dataset.id); if(!item) return;
    app.customChartSeries=[...item.series]; if($('#historyHours')&&item.hours) $('#historyHours').value=String(item.hours);
    renderCustomHistory(); updateBrowserUrl(currentHistoryPath()); return;
  }
  if(action==='delete-chart'){
    app.savedCharts=app.savedCharts.filter(entry=>entry.id!==button.dataset.id); persistSavedCharts(); renderCustomHistory(); return;
  }
  if(action==='copy-chart-link'){
    if(!app.customChartSeries.length) return toast(tr('history.noCustomSeries'), true);
    const path=currentHistoryPath(); updateBrowserUrl(path, true); const link=`${location.origin}${APP_BASE}${path}`;
    try { await navigator.clipboard.writeText(link); } catch (_) { const area=document.createElement('textarea'); area.value=link; document.body.appendChild(area); area.select(); document.execCommand('copy'); area.remove(); }
    toast(tr('history.linkCopied')); return;
  }
}

async function loadLogs() {
  renderLogRetention();
  try {
    const data = await api('/api/events?limit=150');
    const level=$('#logLevelFilter')?.value||'all', category=$('#logCategoryFilter')?.value||'all';
    const logs = (data.events || []).filter(item => (level==='all'||item.level===level) && (category==='all'||logCategory(item.kind)===category));
    $('#logList').innerHTML = logs.length
      ? logs.map(item => `<div class="log-row ${esc(item.level)} category-${esc(logCategory(item.kind))}"><time>${esc(new Date(item.timestamp).toLocaleTimeString(locale()))}</time><span class="log-category">${esc(logCategory(item.kind))}</span><span class="kind">${esc(item.kind)}</span><span class="message">${esc(item.message)}</span></div>`).join('')
      : `<div class="empty"><strong>${esc(tr('logs.emptyTitle'))}</strong>${esc(tr('logs.emptyText'))}</div>`;
  } catch (error) { toast(error.message, true); }
}

function connectWebSocket() {
  if (app.ws && [WebSocket.OPEN, WebSocket.CONNECTING].includes(app.ws.readyState)) return;
  clearTimeout(app.wsTimer);
  const protocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
  const query = app.token ? `?token=${encodeURIComponent(app.token)}` : '';
  const ws = new WebSocket(`${protocol}//${location.host}${withBase('/ws')}${query}`); app.ws = ws;
  ws.onopen = () => updateConnectionIndicator('connected');
  ws.onclose = () => { updateConnectionIndicator('disconnected'); app.wsTimer = setTimeout(connectWebSocket, 3000); };
  ws.onerror = () => updateConnectionIndicator('connectionError');
  ws.onmessage = event => {
    try {
      const message = JSON.parse(event.data);
      if (message.event === 'bootstrap') {
        const data=message.data; app.devices=data.devices||[]; app.zones=data.zones||[]; app.groups=data.groups||[]; app.schedules=data.schedules||[]; app.automations=data.automations||[]; app.settings=data.settings||app.settings; app.sensorAliases={...(app.settings?.home_assistant?.sensor_aliases||{})}; app.system=data.system||app.system; app.outdoorTemperature=Number.isFinite(Number(data.outdoor_temperature))?Number(data.outdoor_temperature):app.outdoorTemperature; renderAll(); scheduleControlPlanLoad(); if(app.settings?.debug?.overlay_enabled) loadDebugBacklog(); return;
      }
      const data = message.data || {};
      if (['device.updated','device.created'].includes(message.event)) { updateDevice(data); renderSummary(); renderDevices(); renderGroups(); scheduleControlPlanLoad(); }
      else if (message.event === 'device.deleted') { app.devices=app.devices.filter(v=>v.id!==data.id); renderAll(); scheduleControlPlanLoad(); }
      else if (message.event === 'devices.discovered') { (data.devices||[]).forEach(updateDevice); renderAll(); scheduleControlPlanLoad(); }
      else if (message.event === 'zone.updated') { const i=app.zones.findIndex(v=>v.id===data.id); if(i>=0) app.zones[i]=data; else app.zones.push(data); renderSummary(); renderHouseClimate(); renderZones(); renderGroups(); scheduleControlPlanLoad(); }
      else if (message.event === 'zone.deleted') { app.zones=app.zones.filter(v=>v.id!==data.id); renderAll(); scheduleControlPlanLoad(); }
      else if (['group.updated','group.created'].includes(message.event)) { const i=app.groups.findIndex(v=>v.id===data.id); if(i>=0) app.groups[i]=data; else app.groups.push(data); renderGroups(); fillSelects(); scheduleControlPlanLoad(); }
      else if (message.event === 'group.deleted') { app.groups=app.groups.filter(v=>v.id!==data.id); renderGroups(); fillSelects(); scheduleControlPlanLoad(); }
      else if (message.event === 'settings.updated') { app.settings=data; app.sensorAliases={...(app.settings?.home_assistant?.sensor_aliases||{})}; renderSettings(); renderNightSettings(); renderHomeAssistantSettings(); renderHouseClimate(); renderDebugOverlay(); if(app.settings?.debug?.overlay_enabled) loadDebugBacklog(); scheduleControlPlanLoad(); }
      else if (message.event === 'house.power_changed') { app.settings=app.settings||{}; app.settings.house_power_enabled=data.house_power_enabled !== false; renderHouseClimate(); renderGroups(); scheduleControlPlanLoad(); }
      else if (message.event === 'debug.settings') { app.settings = app.settings || {}; app.settings.debug = data; renderSettings(); renderDebugOverlay(); if(data.overlay_enabled) loadDebugBacklog(); }
      else if (message.event === 'outdoor.updated') { app.outdoorTemperature=Number.isFinite(Number(data.temperature))?Number(data.temperature):null; renderHouseClimate(); scheduleControlPlanLoad(); }
      else if (message.event === 'gree.frame') { if(app.settings?.debug?.overlay_enabled) debugLine('GREE', `${data.direction || '?'} ${data.protocol_version || ''}`, data.device_name || data.device_id || data.target || '', message.timestamp, data.payload); }
      else if (message.event === 'api.request') { if(app.settings?.debug?.overlay_enabled) debugLine('HTTP', `${data.method || '?'} ${data.status || ''}`, `${data.path || ''} · ${data.duration_ms ?? '?'} ms`, message.timestamp); }
      else if (message.event === 'log.created') { if(app.settings?.debug?.overlay_enabled) debugLine('API', data.kind || data.level || 'log', data.message || '', message.timestamp, data.metadata); if(app.currentView === 'logs') loadLogs(); }
      else if (message.event.startsWith('schedule.') || message.event.startsWith('automation.')) scheduleControlPlanLoad();
    } catch (_) {}
  };
}

document.addEventListener('click', async event => {
  const button = event.target.closest('button'); if (!button) return;
  if (button.dataset.nav) {
    if (button.dataset.nav === 'more') openDialog('moreDialog'); else showView(button.dataset.nav);
    return;
  }
  if (button.dataset.go) { const more=$('#moreDialog'); if(more?.open) more.close(); showView(button.dataset.go); return; }
  if (button.dataset.open) {
    const form = document.getElementById(button.dataset.open.replace('Dialog','Form'));
    if (form) form.reset();
    if (button.dataset.open === 'zoneDialog') {
      if (form) { form.dataset.editingZoneId = ''; if (form.elements.id) form.elements.id.value = ''; }
      updateZoneSensorFields();
    }
    if (button.dataset.open === 'groupDialog') {
      if (form?.elements.id) form.elements.id.value = '';
      renderGroupZoneChoices([]);
    }
    if (button.dataset.open === 'automationDialog') updateAutomationTargetFields();
    if (button.dataset.open === 'scheduleDialog') updateSchedulePresetField();
    openDialog(button.dataset.open);
    return;
  }
  if (button.hasAttribute('data-close')) { button.closest('dialog')?.close(); return; }
  if (button.dataset.historyTab) { showHistoryTab(button.dataset.historyTab); return; }
  if (button.dataset.historyAction) { await handleHistoryAction(button); return; }
  if (button.dataset.scheduleTemplate) {
    const zoneId = $('#schedulePresetZone')?.value; if (!zoneId) return toast(tr('schedules.chooseZone'), true);
    if (!confirm(tr('schedules.replaceConfirm'))) return;
    try {
      button.disabled = true;
      await api(`/api/zones/${encodeURIComponent(zoneId)}/schedule-template`, {method:'POST', body:{template:button.dataset.scheduleTemplate}});
      await loadBootstrap(); toast(tr('schedules.templateApplied'));
    } catch (error) { toast(error.message, true); } finally { button.disabled = false; }
    return;
  }
  const action = button.dataset.action; if (!action) return;
  const device = app.devices.find(v => v.id === button.dataset.device);
  if (device && app.currentView !== 'devices' && deviceZoneDisabled(device.id) && ['power','temperature','mode','fan','toggle'].includes(action)) {
    return toast(tr('devices.disabledZoneTechnicalOnly'), true);
  }
  if (action === 'power' && device) return sendDeviceCommand(device.id, {power:!device.power});
  if (action === 'temperature' && device) return sendDeviceCommand(device.id, {target_temperature:clamp(Number(device.target_temperature)+Number(button.dataset.delta),8,30)});
  if (action === 'mode' && device) return sendDeviceCommand(device.id, {mode:button.dataset.value, power:true});
  if (action === 'fan' && device) return sendDeviceCommand(device.id, {fan_speed:Number(button.dataset.value)});
  if (action === 'toggle' && device) return sendDeviceCommand(device.id, {[button.dataset.field]:!device[button.dataset.field]});
  if (action === 'poll' && device) { try { button.disabled=true; updateDevice(await api(`/api/devices/${encodeURIComponent(device.id)}/poll`,{method:'POST'})); renderAll(); toast(tr('devices.readDone')); } catch(e){toast(e.message,true);} finally{button.disabled=false;} return; }
  if (action === 'bind' && device) { try { button.disabled=true; updateDevice(await api(`/api/devices/${encodeURIComponent(device.id)}/bind`,{method:'POST'})); renderAll(); toast(tr('devices.bound')); } catch(e){toast(e.message,true);} finally{button.disabled=false;} return; }
  if (action === 'rename-device' && device) return populateDeviceRename(device.id);
  if (action === 'delete-device') return deleteEntity('devices', button.dataset.device, 'label.device');
  if (action === 'house-mode') {
    try { app.settings = await api('/api/house/control',{method:'POST',body:{mode:button.dataset.value}}); renderHouseClimate(); scheduleControlPlanLoad(); toast(tr('house.modeUpdated')); }
    catch(error){ toast(error.message,true); } return;
  }
  if (action === 'house-power') {
    const power = button.dataset.value === 'true';
    try {
      button.disabled = true;
      const result = await api('/api/house/power',{method:'POST',body:{power}});
      app.settings = result.settings || app.settings;
      app.devices = result.devices || app.devices;
      app.groups = result.groups || app.groups;
      renderAll(); scheduleControlPlanLoad();
      const failed = Array.isArray(result.failed) ? result.failed.length : 0;
      if (failed) toast(tr('house.powerPartial', {count: failed}), true);
      else toast(tr(power ? 'house.powerOnDone' : 'house.powerOffDone'));
    } catch(error) { toast(error.message, true); }
    finally { button.disabled = false; }
    return;
  }
  if (action === 'house-preset') {
    try {
      const result=await api('/api/house/preset',{method:'POST',body:{preset:button.dataset.value}});
      app.settings=result.settings||app.settings; app.zones=result.zones||app.zones; app.devices=result.devices||app.devices;
      renderAll(); scheduleControlPlanLoad();
      const failed=Array.isArray(result.failed)?result.failed.length:0;
      if(failed) toast(tr('house.powerPartial',{count:failed}),true); else toast(tr('house.presetUpdated'));
    }
    catch(error){ toast(error.message,true); } return;
  }
  if (action === 'group-power') return sendGroupControl(button.dataset.id,{power:button.dataset.value==='true'});
  if (action === 'group-mode') return sendGroupControl(button.dataset.id,{mode:button.dataset.value});
  if (action === 'group-preset') return sendGroupControl(button.dataset.id,{preset:button.dataset.value});
  if (action === 'zone-device-power') return sendZoneLocalPower(button.dataset.id, button.dataset.value === 'true');
  if (action === 'zone-temperature') { const zone=app.zones.find(v=>v.id===button.dataset.id); if(zone) { const base=Number(zone.manual_setpoint ?? zone.effective_setpoint ?? zone.setpoint); queueZoneTemperature(zone, base+Number(button.dataset.delta)); } return; }
  if (action === 'zone-mode') return sendZoneControl(button.dataset.id,{mode:button.dataset.value});
  if (action === 'zone-preset') return sendZoneControl(button.dataset.id,{preset:button.dataset.value});
  if (action === 'zone-enabled') return sendZoneControl(button.dataset.id,{enabled:button.dataset.value==='true'});
  if (action === 'zone-resume-automation') {
    const patch = button.dataset.resume === 'local'
      ? {clear_local_thermostat_override:true}
      : {clear_device_manual_override:true};
    return sendZoneControl(button.dataset.id, patch);
  }
  if (action === 'zone-go-control') {
    showView('dashboard', {scroll:false});
    const target = [...document.querySelectorAll('[data-zone-card]')].find(card => card.dataset.zoneCard === button.dataset.id);
    const disclosure = target?.closest('details.dashboard-disclosure');
    if (disclosure) disclosure.open = true;
    requestAnimationFrame(() => target?.scrollIntoView({behavior:'smooth', block:'center'}));
    return;
  }
  if (action === 'debug-clear') { app.debugLines = []; renderDebugOverlay(); return; }
  if (action === 'edit-group') return populateGroup(button.dataset.id);
  if (action === 'delete-group') return deleteEntity('groups', button.dataset.id, 'groups.group');
  if (action === 'edit-zone') return populateZone(button.dataset.id);
  if (action === 'delete-zone') return deleteEntity('zones', button.dataset.id, 'label.zone');
  if (action === 'edit-schedule') return populateSchedule(button.dataset.id);
  if (action === 'delete-schedule') return deleteEntity('schedules', button.dataset.id, 'label.schedule');
  if (action === 'edit-automation') return populateAutomation(button.dataset.id);
  if (action === 'delete-automation') return deleteEntity('automations', button.dataset.id, 'label.automation');
  if (action === 'revoke-access-token') {
    if (!confirm(tr('confirm.revokeToken'))) return;
    try {
      await api(`/api/access-tokens/${encodeURIComponent(button.dataset.id)}`, {method:'DELETE'});
      app.accessTokens = app.accessTokens.filter(item => item.id !== button.dataset.id);
      renderAccessTokens();
      toast(tr('toast.tokenRevoked'));
    } catch (error) { toast(error.message, true); }
    return;
  }
});

$('#refreshButton').addEventListener('click', () => loadBootstrap(true));
$('#discoverButton').addEventListener('click', () => {
  const form=$('#discoverForm'); form.reset();
  form.protocol_version.value='0'; form.passes.value='3'; form.timeout_ms.value=String(Math.max(6000, Number(app.settings?.discovery_timeout_ms || 3000)));
  openDialog('discoverDialog');
});
$('#historyRefresh').addEventListener('click', loadHistory);
$('#historyHours').addEventListener('change', () => { updateBrowserUrl(currentHistoryPath(), true); loadHistory(); });
$('#logsRefresh').addEventListener('click', loadLogs);
$('#languageSelect').addEventListener('change', event => setLanguage(event.target.value));
$('#themeSelect').addEventListener('change', event => setTheme(event.target.value));
$('#logLevelFilter')?.addEventListener('change', loadLogs); $('#logCategoryFilter')?.addEventListener('change', loadLogs);
$('#settingsForm [name=notifications_provider]')?.addEventListener('change', updateNotificationFields);
$('#zoneForm [name=sensor_source]').addEventListener('change', updateZoneSensorFields);
$('#scheduleForm [name=preset]').addEventListener('change', updateSchedulePresetField);
$('#automationForm [name=action_target_kind]')?.addEventListener('change', updateAutomationTargetFields);
$('#simulationScope')?.addEventListener('change', event => { app.simulationScope=event.target.value; app.simulationTarget='all'; renderSimulationPage(); updateSimulationUrl(); });
$('#simulationTarget')?.addEventListener('change', event => { app.simulationTarget=event.target.value || 'all'; renderSimulationPage(); updateSimulationUrl(); });
$('#simulationOpenTab')?.addEventListener('click', () => { const params=new URLSearchParams({standalone:'1'}); if(app.simulationScope!=='units')params.set('scope',app.simulationScope); if(app.simulationTarget!=='all')params.set('target',app.simulationTarget); window.open(`${withBase('/simulation')}?${params.toString()}`, '_blank', 'noopener'); });
$('#simulationFullscreen')?.addEventListener('click', async () => { try { if(document.fullscreenElement) await document.exitFullscreen(); else await document.documentElement.requestFullscreen(); } catch(error) { toast(error.message, true); } });
document.addEventListener('fullscreenchange', () => { const button=$('#simulationFullscreen'); if(button) button.textContent=tr(document.fullscreenElement?'simulation.exitFullscreen':'simulation.fullscreen'); });

$('#testNotifications')?.addEventListener('click', async () => { const f=$('#settingsForm'); const saved=app.settings?.notifications||{}; const body={enabled:true,mode:f.notifications_mode.value,provider:f.notifications_provider.value,pushover_app_token:f.pushover_app_token.value.trim(),pushover_user_key:f.pushover_user_key.value.trim(),slack_webhook_url:f.slack_webhook_url.value.trim(),discord_webhook_url:f.discord_webhook_url.value.trim(),cooldown_seconds:Number(f.notification_cooldown_seconds.value||300),communication_failure_threshold:Number(f.notification_failure_threshold.value||3),target_timeout_minutes:Number(f.notification_target_timeout.value||60)}; try{await api('/api/integrations/notifications/test',{method:'POST',body});toast('Test notification sent');}catch(e){toast(e.message,true);} });

$('#copyZoneSettings')?.addEventListener('click',()=>{
  const f=$('#zoneForm');
  const source=app.zones.find(zone=>zone.id===$('#copyZoneSource')?.value);
  if(!source)return;
  const targetId=f.dataset.editingZoneId || '';
  if(targetId && source.id===targetId){ toast(tr('zones.copyDifferent'),true); return; }

  // Identity and sensor assignment belong to the destination profile and must never
  // be changed by copying thermostat tuning from another profile.
  const protectedValues={
    id:f.elements.id.value,
    name:f.elements.name.value,
    device_id:f.elements.device_id.value,
    sensor_source:f.elements.sensor_source.value,
    ha_entity_id:f.elements.ha_entity_id.value,
    enabled:f.elements.enabled.checked,
  };
  const copyFields=['setpoint','cool_comfort_setpoint','cool_sleep_setpoint','cool_away_setpoint','heat_comfort_setpoint','heat_sleep_setpoint','heat_away_setpoint','hysteresis','min_on_seconds','min_off_seconds','min_adjust_seconds','standby_offset_c','external_sensor_weight_percent','max_sensor_difference'];
  copyFields.forEach(name=>{
    const input=f.elements[name];
    if(!input)return;
    const value=name==='external_sensor_weight_percent'?(source.external_sensor_weight*100):source[name];
    if(value!==undefined&&value!==null)input.value=String(value);
  });
  f.elements.smart_fan.checked=source.smart_fan!==false;
  if(f.elements.mode_policy) f.elements.mode_policy.value=source.inherit_house_mode===false?(source.mode||'cool'):'house';

  f.elements.id.value=protectedValues.id;
  f.elements.name.value=protectedValues.name;
  f.elements.device_id.value=protectedValues.device_id;
  f.elements.sensor_source.value=protectedValues.sensor_source;
  f.elements.ha_entity_id.value=protectedValues.ha_entity_id;
  f.elements.enabled.checked=protectedValues.enabled;
  f.dataset.editingZoneId=targetId;
  updateZoneSensorFields();
  toast(tr('zones.copiedFrom',{name:source.name}));
});

$('#applyAutomationPreset')?.addEventListener('click',()=>{ const f=$('#automationForm'), p=$('#automationPreset')?.value; if(!p)return; const first=app.devices[0]?.id||''; const presets={hot:{name:'High temperature cooling',trigger_kind:'temperature_above',threshold:'28',action_power:'true',action_mode:'cool',action_target_temperature:'23',cooldown_seconds:'900'},cold:{name:'Low temperature heating',trigger_kind:'temperature_below',threshold:'17',action_power:'true',action_mode:'heat',action_target_temperature:'21',cooldown_seconds:'900'},morning:{name:'Morning comfort',trigger_kind:'time',at_time:'07:00',action_power:'true',action_mode:'auto',action_target_temperature:'22',cooldown_seconds:'3600'},nightoff:{name:'Night power off',trigger_kind:'time',at_time:'23:30',action_power:'false',action_mode:'',action_target_temperature:'',cooldown_seconds:'3600'}}; const x=presets[p]; f.action_target_kind.value='device'; updateAutomationTargetFields(); Object.entries(x).forEach(([k,v])=>{if(f[k])f[k].value=v}); if(!f.trigger_device_id.value)f.trigger_device_id.value=first; if(!f.action_device_id.value)f.action_device_id.value=first; });

$('#tokenForm').addEventListener('submit', event => {
  event.preventDefault(); app.token = new FormData(event.currentTarget).get('token').trim();
  localStorage.setItem('gree_controller_token', app.token); if (app.ws) app.ws.close(); loadBootstrap();
});

$('#discoverForm').addEventListener('submit', async event => {
  event.preventDefault(); const form=event.currentTarget, raw=Object.fromEntries(new FormData(form));
  const submit=form.querySelector('button[type=submit]'); submit.disabled=true; submit.textContent=tr('actions.discovering');
  try {
    const result=await api('/api/discovery',{method:'POST',body:{protocol_version:Number(raw.protocol_version),passes:Number(raw.passes),timeout_ms:Number(raw.timeout_ms)}});
    form.closest('dialog').close(); await loadBootstrap(); toast(tr('toast.found',{count:result.count})); showDiscoveryNames(result.new_device_ids || []);
  } catch(error){toast(error.message,true);} finally {submit.disabled=false;submit.textContent=tr('actions.discover');}
});

$('#discoveryNamesForm').addEventListener('submit', async event => {
  event.preventDefault();
  const form = event.currentTarget;
  const inputs = $$('input[data-device-id]', form);
  try {
    const updated = await Promise.all(inputs.map(input => api(`/api/devices/${encodeURIComponent(input.dataset.deviceId)}`, {method:'PATCH', body:{name:input.value.trim()}})));
    updated.forEach(updateDevice);
    form.closest('dialog').close();
    renderAll();
    toast(tr('common.saved'));
  } catch (error) { toast(error.message, true); }
});

$('#renameDeviceForm').addEventListener('submit', async event => {
  event.preventDefault(); const form=event.currentTarget, raw=Object.fromEntries(new FormData(form));
  try {
    const device=await api(`/api/devices/${encodeURIComponent(raw.id)}`,{method:'PATCH',body:{name:raw.name.trim(),protocol_version:Number(raw.protocol_version)}});
    updateDevice(device); form.closest('dialog').close(); renderAll(); toast(tr('common.saved'));
  } catch(error){toast(error.message,true);}
});

$('#deviceForm').addEventListener('submit', async event => {
  event.preventDefault(); const form=event.currentTarget, data=Object.fromEntries(new FormData(form));
  data.port=Number(data.port); data.protocol_version=Number(data.protocol_version); data.simulated=form.simulated.checked;
  try { await api('/api/devices',{method:'POST',body:data}); form.closest('dialog').close(); form.reset(); await loadBootstrap(); toast(tr('devices.added')); }
  catch(error){toast(error.message,true);}
});

$('#zoneForm').addEventListener('submit', async event => {
  event.preventDefault(); const form=event.currentTarget, raw=Object.fromEntries(new FormData(form));
  const id=form.dataset.editingZoneId || raw.id; const body={
    name:raw.name,device_id:raw.device_id,enabled:form.enabled.checked,
    mode:raw.mode_policy==='house'?'cool':raw.mode_policy,inherit_house_mode:raw.mode_policy==='house',setpoint:parseDecimal(raw.setpoint),
    cool_comfort_setpoint:parseDecimal(raw.cool_comfort_setpoint),cool_sleep_setpoint:parseDecimal(raw.cool_sleep_setpoint),cool_away_setpoint:parseDecimal(raw.cool_away_setpoint),
    heat_comfort_setpoint:parseDecimal(raw.heat_comfort_setpoint),heat_sleep_setpoint:parseDecimal(raw.heat_sleep_setpoint),heat_away_setpoint:parseDecimal(raw.heat_away_setpoint),
    hysteresis:parseDecimal(raw.hysteresis),min_on_seconds:Number(raw.min_on_seconds),min_off_seconds:Number(raw.min_off_seconds),
    min_adjust_seconds:Number(raw.min_adjust_seconds),standby_offset_c:parseDecimal(raw.standby_offset_c),smart_fan:form.smart_fan.checked,
    sensor_source:raw.sensor_source,ha_entity_id:raw.ha_entity_id||null,external_sensor_weight:Number(raw.external_sensor_weight_percent)/100,max_sensor_difference:parseDecimal(raw.max_sensor_difference)
  };
  try { await api(id?`/api/zones/${encodeURIComponent(id)}`:'/api/zones',{method:id?'PUT':'POST',body}); form.closest('dialog').close(); form.reset(); await loadBootstrap(); toast(tr('common.saved')); }
  catch(error){toast(error.message,true);}
});

$('#groupForm')?.addEventListener('submit', async event => {
  event.preventDefault();
  const form=event.currentTarget, raw=Object.fromEntries(new FormData(form));
  const id=raw.id || '';
  const zone_ids=$$('input[name=zone_ids]:checked', form).map(input => input.value);
  if (!zone_ids.length) return toast(tr('groups.chooseMember'), true);
  const existing=id ? app.groups.find(group => group.id===id) : null;
  const body={name:raw.name.trim(),zone_ids,power_enabled:existing?.power_enabled !== false};
  try {
    await api(id?`/api/groups/${encodeURIComponent(id)}`:'/api/groups',{method:id?'PUT':'POST',body});
    form.closest('dialog').close(); form.reset(); await loadBootstrap(); toast(tr('common.saved'));
  } catch(error){toast(error.message,true);}
});

$('#scheduleForm').addEventListener('submit', async event => {
  event.preventDefault(); const form=event.currentTarget, raw=Object.fromEntries(new FormData(form));
  const id=raw.id, weekdays=$$('[name=weekday]:checked',form).map(v=>Number(v.value));
  const body={name:raw.name,zone_id:raw.zone_id,enabled:form.enabled.checked,weekdays,start_time:raw.start_time,end_time:raw.end_time,preset:raw.preset,setpoint:parseDecimal(raw.setpoint||23)};
  try { await api(id?`/api/schedules/${encodeURIComponent(id)}`:'/api/schedules',{method:id?'PUT':'POST',body}); form.closest('dialog').close(); form.reset(); await loadBootstrap(); toast(tr('common.saved')); }
  catch(error){toast(error.message,true);}
});

$('#automationForm').addEventListener('submit', async event => {
  event.preventDefault(); const form=event.currentTarget, raw=Object.fromEntries(new FormData(form)); const id=raw.id;
  const groupTarget=raw.action_target_kind==='group';
  const action={}; if(raw.action_power!=='') action.power=raw.action_power==='true'; if(raw.action_mode) action.mode=raw.action_mode; if(!groupTarget && raw.action_target_temperature!=='') action.target_temperature=parseDecimal(raw.action_target_temperature);
  const body={name:raw.name,enabled:form.enabled.checked,trigger_kind:raw.trigger_kind,trigger_device_id:raw.trigger_device_id||null,threshold:raw.threshold===''?null:parseDecimal(raw.threshold),at_time:raw.at_time||null,action_device_id:groupTarget?'':raw.action_device_id,action_group_id:groupTarget?(raw.action_group_id||null):null,action_preset:groupTarget?(raw.action_preset||null):null,action,cooldown_seconds:Number(raw.cooldown_seconds)};
  try { await api(id?`/api/automations/${encodeURIComponent(id)}`:'/api/automations',{method:id?'PUT':'POST',body}); form.closest('dialog').close(); form.reset(); await loadBootstrap(); toast(tr('common.saved')); }
  catch(error){toast(error.message,true);}
});

function currentSettingsBody() {
  const settings = app.settings || {};
  const influx = settings.influxdb || {};
  const ha = settings.home_assistant || {};
  return {
    controller_id: settings.controller_id || 'gree-controller',
    simulator_enabled: !!settings.simulator_enabled,
    poll_interval_seconds: Number(settings.poll_interval_seconds || 15),
    zone_interval_seconds: Number(settings.zone_interval_seconds || 5),
    discovery_timeout_ms: Number(settings.discovery_timeout_ms || 3000),
    discovery_broadcast: settings.discovery_broadcast || '255.255.255.255:7000',
    house_mode: settings.house_mode || 'cool',
    house_power_enabled: settings.house_power_enabled !== false,
    control_strategy: 'setpoint',
    outdoor_assist_enabled: !!settings.outdoor_assist_enabled,
    history_retention_days: Number(settings.history_retention_days || 30),
    history_compaction_enabled: settings.history_compaction_enabled !== false,
    event_log_retention_days: Number(settings.event_log_retention_days || 30),
    suppress_device_beep: !!settings.suppress_device_beep,
    notifications: {
      enabled: !!settings.notifications?.enabled, mode: settings.notifications?.mode || 'problems', provider: settings.notifications?.provider || 'pushover',
      pushover_app_token: '', pushover_user_key: '', slack_webhook_url: '', discord_webhook_url: '',
      cooldown_seconds: Number(settings.notifications?.cooldown_seconds || 300), communication_failure_threshold: Number(settings.notifications?.communication_failure_threshold || 3), target_timeout_minutes: Number(settings.notifications?.target_timeout_minutes || 60),
    },
    night_mode: {
      enabled: !!settings.night_mode?.enabled,
      start_time: settings.night_mode?.start_time || '22:00',
      end_time: settings.night_mode?.end_time || '06:00',
      max_fan_speed: Number(settings.night_mode?.max_fan_speed || 1),
      force_quiet: settings.night_mode?.force_quiet !== false,
      use_native_sleep: settings.night_mode?.use_native_sleep !== false,
    },
    influxdb: {
      enabled: !!influx.enabled,
      version: String(influx.version || '2'),
      url: influx.url || '',
      database: influx.database || 'gree_controller',
      username: influx.username || '',
      password: '',
      org: influx.org || '',
      bucket: influx.bucket || 'gree_controller',
      token: '',
      history_threshold_days: Number(influx.history_threshold_days || 30),
    },
    debug: {
      overlay_enabled: !!settings.debug?.overlay_enabled,
      gree_frames: !!settings.debug?.gree_frames,
    },
    home_assistant: {
      url: ha.url || '',
      token: '',
      default_entity_id: ha.default_entity_id || '',
      outdoor_entity_id: ha.outdoor_entity_id || '',
      allow_invalid_tls: !!ha.allow_invalid_tls,
      sensor_aliases: {...(ha.sensor_aliases || {})},
    },
  };
}

function settingsBodyFromForm(form) {
  const raw = Object.fromEntries(new FormData(form));
  const body = currentSettingsBody();
  body.controller_id = raw.controller_id;
  body.simulator_enabled = form.simulator_enabled.checked;
  body.poll_interval_seconds = Number(raw.poll_interval_seconds);
  body.zone_interval_seconds = Number(raw.zone_interval_seconds);
  body.discovery_timeout_ms = Number(raw.discovery_timeout_ms);
  body.discovery_broadcast = raw.discovery_broadcast;
  body.history_retention_days = Number(raw.history_retention_days);
  body.history_compaction_enabled = form.history_compaction_enabled.checked;
  body.event_log_retention_days = Number(raw.event_log_retention_days);
  body.suppress_device_beep = form.suppress_device_beep.checked;
  body.influxdb = {
    enabled: form.influx_enabled.checked, version: raw.influx_version, url: raw.influx_url,
    database: raw.influx_database, username: raw.influx_username, password: raw.influx_password,
    org: raw.influx_org, bucket: raw.influx_bucket, token: raw.influx_token,
    history_threshold_days: Number(raw.influx_threshold_days),
  };
  body.debug = {overlay_enabled: form.debug_overlay_enabled.checked, gree_frames: form.debug_gree_frames.checked};
  body.notifications = {
    enabled: form.notifications_enabled.checked, mode: raw.notifications_mode, provider: raw.notifications_provider,
    pushover_app_token: raw.pushover_app_token || '', pushover_user_key: raw.pushover_user_key || '',
    slack_webhook_url: raw.slack_webhook_url || '', discord_webhook_url: raw.discord_webhook_url || '',
    cooldown_seconds: Number(raw.notification_cooldown_seconds || 300),
    communication_failure_threshold: Number(raw.notification_failure_threshold || 3),
    target_timeout_minutes: Number(raw.notification_target_timeout || 60),
  };
  return body;
}

function nightSettingsBodyFromForm(form) {
  const raw = Object.fromEntries(new FormData(form));
  const body = currentSettingsBody();
  body.night_mode = {
    enabled: form.night_mode_enabled.checked,
    start_time: raw.night_mode_start,
    end_time: raw.night_mode_end,
    max_fan_speed: Number(raw.night_mode_max_fan_speed),
    force_quiet: form.night_mode_force_quiet.checked,
    use_native_sleep: form.night_mode_native_sleep.checked,
  };
  return body;
}

function homeAssistantSettingsBodyFromForm(form) {
  const raw = Object.fromEntries(new FormData(form));
  const body = currentSettingsBody();
  body.outdoor_assist_enabled = form.outdoor_assist_enabled.checked;
  body.home_assistant = {
    url: raw.ha_url,
    token: raw.ha_token,
    default_entity_id: raw.ha_entity_id,
    outdoor_entity_id: raw.ha_outdoor_entity_id,
    allow_invalid_tls: form.ha_allow_invalid_tls.checked,
    sensor_aliases: {...(app.sensorAliases || {})},
  };
  return body;
}

async function saveRuntimeSettings(body, notify = true) {
  app.settings = await api('/api/settings', {method:'PUT', body});
  app.sensorAliases = {...(app.settings?.home_assistant?.sensor_aliases || {})};
  renderSettings();
  renderNightSettings();
  renderHomeAssistantSettings();
  renderHouseClimate();
  renderDebugOverlay();
  scheduleControlPlanLoad();
  if (app.settings?.debug?.overlay_enabled) loadDebugBacklog();
  if (notify) toast(tr('common.saved'));
  return app.settings;
}

$('#settingsForm').addEventListener('submit', async event => {
  event.preventDefault();
  try { await saveRuntimeSettings(settingsBodyFromForm(event.currentTarget), true); }
  catch(error) { toast(error.message, true); }
});

$('#nightModeForm')?.addEventListener('submit', async event => {
  event.preventDefault();
  try { await saveRuntimeSettings(nightSettingsBodyFromForm(event.currentTarget), true); }
  catch(error) { toast(error.message, true); }
});

$('#homeAssistantForm')?.addEventListener('submit', async event => {
  event.preventDefault();
  try { await saveRuntimeSettings(homeAssistantSettingsBodyFromForm(event.currentTarget), true); }
  catch(error) { toast(error.message, true); }
});

$('#addSensorAlias')?.addEventListener('click', () => {
  const entityInput = $('#sensorAliasEntity'), aliasInput = $('#sensorAliasName');
  const entity = entityInput.value.trim(), alias = aliasInput.value.trim();
  if (!entity || !alias) return toast(tr('settings.aliasRequired'), true);
  app.sensorAliases[entity] = alias;
  entityInput.value = ''; aliasInput.value = '';
  renderSensorAliases(); renderHistoryNavigation();
});

document.addEventListener('input', event => {
  const input = event.target.closest('[data-sensor-alias]'); if (!input) return;
  const entity = input.dataset.sensorAlias, alias = input.value.trim();
  if (alias) app.sensorAliases[entity] = alias; else delete app.sensorAliases[entity];
});

document.addEventListener('click', event => {
  const button = event.target.closest('[data-clear-sensor-alias]'); if (!button) return;
  delete app.sensorAliases[button.dataset.clearSensorAlias];
  renderSensorAliases(); renderHistoryNavigation();
});

$('#saveLogRetention')?.addEventListener('click', async () => {
  const days = Number($('#logRetentionDays')?.value || 30);
  try {
    const result = await api('/api/events/retention', {method:'PUT', body:{days}});
    app.settings.event_log_retention_days = result.days;
    $('#settingsForm').event_log_retention_days.value = result.days;
    renderLogRetention(); await loadLogs(); toast(tr('logs.retentionSaved', {days: result.days}));
  } catch (error) { toast(error.message, true); }
});

$('#createAccessToken').addEventListener('click', async event => {
  const button = event.currentTarget;
  button.disabled = true;
  try {
    const result = await api('/api/access-tokens', {method:'POST', body:{name:'Home Assistant'}});
    if (result.item) app.accessTokens.unshift(result.item);
    renderAccessTokens();
    $('#generatedAccessToken').value = result.token || '';
    openDialog('generatedTokenDialog');
    toast(tr('toast.tokenCreated'));
  } catch (error) { toast(error.message, true); }
  finally { button.disabled = false; }
});

$('#copyAccessToken').addEventListener('click', async () => {
  const input = $('#generatedAccessToken');
  try {
    await navigator.clipboard.writeText(input.value);
    toast(tr('toast.tokenCopied'));
  } catch (_) {
    input.select();
    document.execCommand('copy');
    toast(tr('toast.tokenCopied'));
  }
});

$('#haTest').addEventListener('click', async () => {
  const form=$('#homeAssistantForm');
  try {
    await saveRuntimeSettings(homeAssistantSettingsBodyFromForm(form), false);
    const entity = form.ha_entity_id.value || form.ha_outdoor_entity_id.value || null;
    const result=await api('/api/integrations/home-assistant/test',{method:'POST',body:{entity_id:entity}});
    toast(tr('toast.haTemperature',{temperature:result.temperature_c.toFixed(1)}));
  } catch(error){toast(error.message,true);}
});

$('#simulationRefresh')?.addEventListener('click', async () => {
  try { await loadControlPlan(); toast(tr('common.updated')); }
  catch (error) { toast(error.message, true); }
});

$('#exportSettings').addEventListener('click', async () => {
  try {
    const data = await api('/api/settings/export');
    const blob = new Blob([JSON.stringify(data, null, 2)], {type:'application/json'});
    const link = document.createElement('a');
    link.href = URL.createObjectURL(blob);
    link.download = `gree-controller-settings-${new Date().toISOString().slice(0,10)}.json`;
    document.body.appendChild(link); link.click(); link.remove(); URL.revokeObjectURL(link.href);
    toast(tr('toast.exported'));
  } catch (error) { toast(error.message, true); }
});

$('#importSettings').addEventListener('click', () => $('#importSettingsFile').click());
$('#importSettingsFile').addEventListener('change', async event => {
  const file = event.target.files?.[0]; if (!file) return;
  try {
    if (!confirm(tr('settings.importConfirm'))) return;
    const body = JSON.parse(await file.text());
    await api('/api/settings/import', {method:'POST', body});
    app.debugBacklogLoaded = false;
    await loadBootstrap();
    toast(tr('toast.imported'));
  } catch (error) { toast(error.message, true); }
  finally { event.target.value = ''; }
});

document.addEventListener('change', event => {
  const target=event.target;
  if(target.id==='historyZoneSelect'){app.historyZone=target.value;updateBrowserUrl(currentHistoryPath());renderHistoryPage();}
  else if(target.id==='historyDeviceSelect'){app.historyDevice=target.value;updateBrowserUrl(currentHistoryPath());renderHistoryPage();}
  else if(target.id==='historySensorSelect'){app.historySensor=target.value;updateBrowserUrl(currentHistoryPath());renderHistoryPage();}
  else if(target.name==='influx_version') updateInfluxFields();
});

window.addEventListener('popstate', applyRouteFromLocation);

let historyResizeTimer;
window.addEventListener('resize', () => { if (app.currentView === 'history') { clearTimeout(historyResizeTimer); historyResizeTimer=setTimeout(drawCurrentChartIfVisible,120); } });
window.matchMedia('(prefers-color-scheme: light)').addEventListener('change', () => { if (app.theme === 'system') applyTheme(); });
if ('serviceWorker' in navigator) window.addEventListener('load', () => navigator.serviceWorker.register('/sw.js').catch(()=>{}));

async function startApplication() {
  applyTheme();
  await loadLanguages();
  applyTranslations();
  updateZoneSensorFields();
  updateSchedulePresetField();
  await loadBootstrap();
  applyRouteFromLocation();
  if (location.pathname === '/' || location.pathname === `${APP_BASE}/`) updateBrowserUrl('/dashboard', true);
}

startApplication().catch(error => console.error('Application startup failed:', error));