#!/usr/bin/env node
'use strict';

const assert = require('assert');
const fs = require('fs');
const path = require('path');
const vm = require('vm');

const root = path.resolve(__dirname, '..');
const timers = [];
let timerId = 0;
let apiCalls = [];
let apiResponder = async requestPath => requestPath === '/api/schedules' ? [] : {};
const calls = {};
const hit = name => () => { calls[name] = (calls[name] || 0) + 1; };

class FakeWebSocket {
  static OPEN = 1;
  static CONNECTING = 0;
  static CLOSED = 3;
  static instances = [];
  constructor(url) {
    this.url = url;
    this.readyState = FakeWebSocket.CONNECTING;
    FakeWebSocket.instances.push(this);
  }
}

const app = {
  devices: [], zones: [], groups: [], schedules: [], automations: [], flows: [], accessTokens: [],
  settings: { house_mode: 'cool', debug: { overlay_enabled: false }, home_assistant: {} },
  system: {}, outdoorTemperature: null, controlPlan: null, controlPlanRevision: null,
  controlPlanPushReady: false, controlPlanTimer: null, currentView: 'dashboard',
  sensorAliases: {}, flowSharedInputs: [], flowDraft: null, ws: null, wsTimer: null,
  token: '', debugBacklogLoaded: false,
};

const context = {
  console, JSON, Number, Date, Intl, Promise, app, WebSocket: FakeWebSocket,
  location: { protocol: 'http:', host: 'controller.test' },
  setTimeout: (fn, delay) => {
    const id = ++timerId;
    timers.push({ id, fn, delay, cleared: false });
    return id;
  },
  clearTimeout: id => {
    const timer = timers.find(item => item.id === id);
    if (timer) timer.cleared = true;
  },
  api: async (...args) => {
    apiCalls.push(args);
    return apiResponder(...args);
  },
  withBase: value => value,
  $: () => null,
  isFormDirty: () => false,
  applySettingsSection: (name, data) => { app.settings[name] = data; },
  loadDebugBacklog: hit('loadDebugBacklog'),
  loadBootstrap: async () => { calls.loadBootstrap = (calls.loadBootstrap || 0) + 1; },
  updateConnectionIndicator: status => { calls[`connection:${status}`] = (calls[`connection:${status}`] || 0) + 1; },
  updateDevice: device => {
    const index = app.devices.findIndex(item => item.id === device.id);
    if (index >= 0) app.devices[index] = device; else app.devices.push(device);
  },
  toast: () => {}, tr: key => key, esc: value => String(value), locale: () => 'en-GB',
  logCategory: () => 'test', debugLine: hit('debugLine'),
};

const renderNames = [
  'renderAll', 'renderSummary', 'renderDevices', 'renderGroups', 'renderHouseClimate',
  'renderZones', 'renderFlows', 'renderSchedules', 'renderAutomations', 'renderSettings',
  'renderSimulationModeBanner', 'renderSystemInfo', 'renderLogRetention', 'renderNightSettings',
  'renderHomeAssistantSettings', 'renderDebugOverlay', 'renderFlowEditor', 'renderGreeFrameStats',
  'renderControlPlan', 'renderSimulationPage', 'fillSelects',
];
for (const name of renderNames) context[name] = hit(name);

vm.createContext(context);
vm.runInContext(fs.readFileSync(path.join(root, 'web/js/dashboard.js'), 'utf8'), context, { filename: 'dashboard.js' });
vm.runInContext(fs.readFileSync(path.join(root, 'web/js/bootstrap.js'), 'utf8'), context, { filename: 'bootstrap.js' });
vm.runInContext(fs.readFileSync(path.join(root, 'web/js/realtime.js'), 'utf8'), context, { filename: 'realtime.js' });
// Source files define DOM-heavy renderers. Replace those implementations for this state-machine test.
for (const name of renderNames) context[name] = hit(name);
context.updateDevice = device => {
  const index = app.devices.findIndex(item => item.id === device.id);
  if (index >= 0) app.devices[index] = device; else app.devices.push(device);
};
context.applySettingsSection = (name, data) => { app.settings[name] = data; };
context.loadDebugBacklog = hit('loadDebugBacklog');
context.loadBootstrap = async () => { calls.loadBootstrap = (calls.loadBootstrap || 0) + 1; };
context.isFormDirty = () => false;
context.updateConnectionIndicator = status => { calls[`connection:${status}`] = (calls[`connection:${status}`] || 0) + 1; };
context.withBase = value => value;

async function send(event, data) {
  await context.handleWebSocketMessage({
    data: JSON.stringify({ event, timestamp: new Date().toISOString(), data }),
  });
}


async function testBootstrapReloadQueue() {
  const queuedTimers = [];
  let firstResolve;
  let bootstrapCalls = 0;
  const firstResponse = new Promise(resolve => { firstResolve = resolve; });
  const c = {
    console, Promise, Date,
    app: { loading: false, bootstrapReloadPending: false, controlPlan: null, controlPlanRevision: null, settings: {}, sensorAliases: {}, flowSharedInputs: {}, system: {}, debugBacklogLoaded: false },
    api: async requestPath => {
      assert.equal(requestPath, '/api/bootstrap');
      bootstrapCalls += 1;
      if (bootstrapCalls === 1) return firstResponse;
      return { devices: [], zones: [], groups: [], schedules: [], automations: [], flows: [], access_tokens: [], settings: {}, house: { mode: 'cool' }, system: {}, control_plan: { marker: 'second' }, control_plan_revision: 2 };
    },
    renderAll: () => {}, scheduleControlPlanLoad: () => {}, loadDebugBacklog: () => {}, toast: () => {}, tr: key => key,
    $: () => ({ open: false }), connectWebSocket: () => {},
    setTimeout: (fn, delay) => { queuedTimers.push({ fn, delay }); return queuedTimers.length; },
  };
  vm.createContext(c);
  vm.runInContext(fs.readFileSync(path.join(root, 'web/js/bootstrap.js'), 'utf8'), c, { filename: 'bootstrap.js' });
  const first = c.loadBootstrap();
  assert.equal(c.app.loading, true);
  await c.loadBootstrap();
  assert.equal(c.app.bootstrapReloadPending, true, 'a bootstrap request during loading must be queued');
  firstResolve({ devices: [], zones: [], groups: [], schedules: [], automations: [], flows: [], access_tokens: [], settings: {}, house: { mode: 'cool' }, system: {}, control_plan: { marker: 'first' }, control_plan_revision: 1 });
  await first;
  assert.equal(c.app.outdoorTemperature, null, 'null/missing outdoor temperature must stay unknown, not become 0 C');
  assert.equal(c.app.bootstrapReloadPending, false);
  assert.equal(queuedTimers.length, 1);
  assert.equal(queuedTimers[0].delay, 0);
  queuedTimers[0].fn();
  await new Promise(resolve => setImmediate(resolve));
  assert.equal(bootstrapCalls, 2, 'queued bootstrap reload must run after the first request finishes');
}

async function main() {
  await testBootstrapReloadQueue();
  const apiCallsBeforeBootstrap = apiCalls.length;
  await send('bootstrap', {
    devices: [{ id: 'd1', power: false }],
    zones: [{ id: 'z1', demand: false }],
    groups: [{ id: 'g1', name: 'G1' }],
    schedules: [{ id: 's1', name: 'S1' }],
    automations: [{ id: 'a1', name: 'A1' }],
    flows: [{ id: 'f1', name: 'F1' }],
    access_tokens: [{ id: 't1', name: 'HA', token_prefix: 'abc', created_at: '2026-09-07T08:00:00Z' }],
    settings: {
      application: { simulator_enabled: true },
      gree: { controller_id: 'test-controller' },
      history: { retention_days: 30 }, influxdb: {}, notifications: {}, night: {},
      home_assistant: { sensor_aliases: { 'sensor.bootstrap': 'Bootstrap' }, flow_inputs: [], outdoor_assist_enabled: true },
      debug: { overlay_enabled: false },
    },
    house: { mode: 'heat' }, system: { ok: true }, outdoor_temperature: 10,
    control_plan: { marker: 'p1' }, control_plan_revision: 1,
  });
  assert.equal(apiCalls.length, apiCallsBeforeBootstrap, 'WebSocket bootstrap must not fetch split settings endpoints');
  assert.equal(app.accessTokens[0].id, 't1', 'WebSocket bootstrap must refresh access-token metadata');
  assert.equal(app.settings.controller_id, 'test-controller');
  assert.equal(app.sensorAliases['sensor.bootstrap'], 'Bootstrap');
  assert.equal(app.controlPlan.marker, 'p1');
  assert.equal(app.controlPlanRevision, 1);
  assert.equal(app.controlPlanPushReady, true);

  await send('control_plan.updated', { revision: 2, plan: { marker: 'p2' } });
  await send('control_plan.updated', { revision: 1, plan: { marker: 'stale' } });
  assert.equal(app.controlPlan.marker, 'p2', 'stale control-plan revision must be ignored');

  app.ws = { readyState: FakeWebSocket.OPEN };
  const timerCountWhilePushReady = timers.length;

  await send('device.updated', { id: 'd1', power: true, online: true });
  assert.equal(app.devices[0].power, true);
  await send('device.created', { id: 'd2', power: false });
  assert(app.devices.some(item => item.id === 'd2'));
  await send('devices.discovered', { devices: [{ id: 'd3', power: false }] });
  assert(app.devices.some(item => item.id === 'd3'));
  await send('device.deleted', { id: 'd2' });
  assert(!app.devices.some(item => item.id === 'd2'));

  await send('zone.updated', { id: 'z1', demand: true, current_temperature: 22.1 });
  assert.equal(app.zones[0].demand, true);
  await send('zone.created', { id: 'z2', demand: false });
  assert(app.zones.some(item => item.id === 'z2'));
  await send('zone.deleted', { id: 'z2' });
  assert(!app.zones.some(item => item.id === 'z2'));

  await send('group.updated', { id: 'g1', name: 'G1 updated' });
  assert.equal(app.groups[0].name, 'G1 updated');
  await send('group.created', { id: 'g2', name: 'G2' });
  assert(app.groups.some(item => item.id === 'g2'));
  await send('group.deleted', { id: 'g2' });
  assert(!app.groups.some(item => item.id === 'g2'));

  await send('schedule.updated', { id: 's1', name: 'S1 updated' });
  assert.equal(app.schedules[0].name, 'S1 updated');
  await send('schedule.created', { id: 's2', name: 'S2' });
  assert(app.schedules.some(item => item.id === 's2'));
  await send('schedule.deleted', { id: 's2' });
  assert(!app.schedules.some(item => item.id === 's2'));
  apiResponder = async requestPath => requestPath === '/api/schedules' ? [{ id: 's3', name: 'Template' }] : {};
  await send('schedule.template_applied', { zone_id: 'z1', template: 'family', count: 2 });
  assert.equal(app.schedules[0].id, 's3');

  await send('automation.updated', { id: 'a1', name: 'A1 updated', last_fired_at: '2026-09-04T09:00:00Z' });
  assert.equal(app.automations[0].name, 'A1 updated');
  await send('automation.created', { id: 'a2', name: 'A2' });
  assert(app.automations.some(item => item.id === 'a2'));
  await send('automation.deleted', { id: 'a2' });
  assert(!app.automations.some(item => item.id === 'a2'));

  await send('flow.updated', { id: 'f1', name: 'F1 updated' });
  assert.equal(app.flows[0].name, 'F1 updated');
  await send('flow.created', { id: 'f2', name: 'F2' });
  assert(app.flows.some(item => item.id === 'f2'));
  await send('flow.deleted', { id: 'f2' });
  assert(!app.flows.some(item => item.id === 'f2'));

  await send('settings.application.updated', { poll_interval_seconds: 15 });
  await send('settings.gree.updated', { command_timeout_ms: 1000 });
  await send('settings.history.updated', { retention_days: 30 });
  await send('settings.influxdb.updated', { enabled: false });
  await send('settings.notifications.updated', { enabled: false });
  await send('settings.debug.updated', { overlay_enabled: false });
  await send('settings.night.updated', { enabled: true, start_time: '22:00', end_time: '06:00' });
  await send('settings.home_assistant.updated', { sensor_aliases: { 'sensor.room': 'Room' }, flow_inputs: [] });
  assert.equal(app.settings.night.enabled, true);
  assert.equal(app.sensorAliases['sensor.room'], 'Room');

  await send('house.mode_changed', { mode: 'off' });
  assert.equal(app.settings.house_mode, 'off');
  await send('outdoor.updated', { temperature: 12.3 });
  assert.equal(app.outdoorTemperature, 12.3);

  await send('gree.frame_received', { total: 5, device_id: 'd1', device_count: 3 });
  assert.equal(app.system.gree_received_frames, 5);
  assert.equal(app.system.gree_received_frames_by_device.d1, 3);
  app.settings.debug = { overlay_enabled: true };
  await send('gree.frame', { direction: 'rx', payload: {} });
  await send('api.request', { method: 'GET', status: 200, path: '/api/health', duration_ms: 1 });
  await send('log.created', { level: 'info', kind: 'test', message: 'ok', metadata: {} });

  await send('configuration.imported', { at: new Date().toISOString() });
  assert.equal(calls.loadBootstrap, 1, 'configuration import must full-resync connected UIs');

  // With a valid pushed control plan, ordinary state events must not re-enable HTTP control-plan polling.
  assert.equal(timers.length, timerCountWhilePushReady, 'push-ready live events must not schedule control-plan HTTP fallback');

  // When push is unavailable, state changes must schedule the existing HTTP fallback.
  app.controlPlanPushReady = false;
  app.ws = { readyState: FakeWebSocket.CLOSED };
  const fallbackTimerCount = timers.length;
  await send('zone.updated', { id: 'z1', demand: false });
  assert(timers.length > fallbackTimerCount);
  assert.equal(timers[timers.length - 1].delay, 180);

  // An HTTP fallback started while disconnected must never overwrite a newer pushed revision after reconnect.
  let resolveApi;
  apiResponder = () => new Promise(resolve => { resolveApi = resolve; });
  const pendingHttp = context.loadControlPlan();
  app.ws = { readyState: FakeWebSocket.OPEN };
  await send('control_plan.updated', { revision: 3, plan: { marker: 'p3' } });
  resolveApi({ marker: 'old-http' });
  await pendingHttp;
  assert.equal(app.controlPlan.marker, 'p3');

  // Connection lifecycle still switches to fallback and schedules reconnect.
  app.ws = null;
  app.controlPlanPushReady = true;
  context.connectWebSocket();
  const socket = FakeWebSocket.instances[FakeWebSocket.instances.length - 1];
  assert.equal(socket.url, 'ws://controller.test/ws');
  socket.readyState = FakeWebSocket.OPEN;
  socket.onopen();
  assert.equal(calls['connection:connected'], 1);
  const beforeCloseTimers = timers.length;
  socket.readyState = FakeWebSocket.CLOSED;
  socket.onclose();
  assert.equal(app.controlPlanPushReady, false);
  assert(timers.length >= beforeCloseTimers + 2, 'close must schedule fallback and reconnect');

  console.log(`Live realtime test OK (${apiCalls.length} API fallback/resync calls observed)`);
}

main().catch(error => {
  console.error(error.stack || error);
  process.exit(1);
});