/*
 * Copyright (C) 2026 Mateusz Gruszczyński @linuxiarz.pl
 * Source-Available Code / Dual-Licensed.
 * 
 * Free for non-commercial and evaluation use under terms of BSL/GPLv3.
 * Commercial or production use requires a valid paid license.
 * See LICENSE file in repository root for details.
 */

import { installGlobalDiagnostics, logInfo } from "@rustpad/logger";
installGlobalDiagnostics();

import { api } from "@rustpad/api";
import { copyText } from "@rustpad/clipboard";
import { lineFromHash, lineLink } from "@rustpad/line-links";
import { alignPreviewLineNumbers, renderMarkdown, setMarkdownFiles } from "@rustpad/markdown";
import { toast } from "@rustpad/toast";
import { getTheme } from "@rustpad/theme";
import { loadHighlight, loadMediaPlayer, loadMermaid } from "@rustpad/vendor-libs";

const token = location.pathname.split("/").filter(Boolean)[1];
const content = document.querySelector("#public-content");
const lineNumbersToggle = document.querySelector("#public-line-numbers-toggle");
const fullWidthToggle = document.querySelector("#public-full-width-toggle");
const fullWidthStorageKey = "rustpad:public-full-width";
const passwordDialog = document.querySelector("#public-password-dialog"), passwordForm = document.querySelector("#public-password-form"), passwordInput = document.querySelector("#public-password"), passwordError = document.querySelector("#public-password-error");
let pagePassword = "";
let mermaidRenderVersion = 0;
let publicAnchorSettleCleanup = null;
function pageHeaders() { return pagePassword ? { "X-RustPad-Page-Password": pagePassword } : {}; }
async function renderMermaid() {
  const renderVersion = ++mermaidRenderVersion;
  const nodes = [...content.querySelectorAll(".mermaid")];
  if (!nodes.length) return;
  try {
    const mermaid = await loadMermaid();
    mermaid.initialize({ startOnLoad: false, theme: getTheme() === "dark" ? "dark" : "default", securityLevel: "strict" });
    await mermaid.run({ nodes });
  } catch {
    if (renderVersion !== mermaidRenderVersion) return;
    nodes.forEach(node => {
      if (!node.isConnected || !content.contains(node) || !node.parentNode) return;
      const message = document.createElement("p");
      message.className = "error mermaid-error";
      message.textContent = "Failed to load Mermaid.";
      node.parentNode.insertBefore(message, node);
    });
  }
}
async function renderCodeHighlight() { const blocks = content.querySelectorAll('pre code[class^="language-"]'); if (!blocks.length) return; try { const hljs = await loadHighlight(); blocks.forEach(block => { const lines = block.querySelectorAll(".code-line"); if (!lines.length) { hljs.highlightElement(block); return; } const language = [...block.classList].find(name => name.startsWith("language-"))?.slice(9); lines.forEach(line => { try { line.innerHTML = hljs.highlight(line.textContent, { language, ignoreIllegals: true }).value; } catch { line.innerHTML = hljs.highlightAuto(line.textContent).value; } }); block.classList.add("hljs"); }); } catch { } }
async function renderMediaPlayers() { const nodes = content.querySelectorAll("[data-rustpad-player]"); if (!nodes.length) return; try { const { hydrateMediaPlayers } = await loadMediaPlayer(); hydrateMediaPlayers(content); } catch { } }
function lockPublicContent(allowTaskUpdates) {
  content.querySelectorAll('[contenteditable]').forEach(node => node.removeAttribute('contenteditable'));
  content.querySelectorAll('.preview-editable').forEach(node => node.classList.remove('preview-editable'));
  content.querySelectorAll('.task-checkbox').forEach(box => { box.disabled = !allowTaskUpdates; box.title = allowTaskUpdates ? 'Update this task' : 'Task updates are disabled by the owner'; });
}
function publicAnchorTarget(hash) {
  const rawId = String(hash || "").replace(/^#/, "");
  if (!rawId) return null;
  let id;
  try { id = decodeURIComponent(rawId); } catch { id = rawId; }
  const target = document.getElementById(id);
  if (target && content.contains(target)) return target;
  const line = lineFromHash(hash);
  return line ? content.querySelector(`.preview-source-line[data-source-line="${line}"]`) : null;
}
function markPublicAnchor(target) {
  content.querySelectorAll(".is-public-link-target").forEach(node => node.classList.remove("is-public-link-target"));
  target?.classList.add("is-public-link-target");
}
function scrollToPublicAnchor(hash, behavior = "auto") {
  const target = publicAnchorTarget(hash);
  if (!target) return false;
  for (let details = target.closest("details"); details; details = details.parentElement?.closest("details")) details.open = true;
  markPublicAnchor(target);
  target.scrollIntoView({ behavior, block: "start" });
  return true;
}
function settleInitialPublicAnchor(hash) {
  publicAnchorSettleCleanup?.();
  publicAnchorSettleCleanup = null;
  if (!hash) return;

  let stopped = false;
  let frame = 0;
  let observer = null;
  const cleanups = [];
  const cleanup = () => {
    if (stopped) return;
    stopped = true;
    cancelAnimationFrame(frame);
    observer?.disconnect();
    cleanups.splice(0).forEach(remove => remove());
    if (publicAnchorSettleCleanup === cleanup) publicAnchorSettleCleanup = null;
  };
  const correct = () => {
    frame = 0;
    if (stopped || location.hash !== hash) return;
    scrollToPublicAnchor(hash);
  };
  const scheduleCorrection = () => {
    if (stopped || frame) return;
    frame = requestAnimationFrame(correct);
  };
  const stopOnUserInput = () => cleanup();

  ["wheel", "touchstart", "pointerdown", "keydown"].forEach(type => {
    window.addEventListener(type, stopOnUserInput, { capture: true, passive: true });
    cleanups.push(() => window.removeEventListener(type, stopOnUserInput, true));
  });

  content.querySelectorAll("img, video, iframe").forEach(asset => {
    ["load", "error", "loadedmetadata"].forEach(type => {
      asset.addEventListener(type, scheduleCorrection, { once: true });
      cleanups.push(() => asset.removeEventListener(type, scheduleCorrection));
    });
  });

  if (document.readyState !== "complete") {
    window.addEventListener("load", scheduleCorrection, { once: true });
    cleanups.push(() => window.removeEventListener("load", scheduleCorrection));
  }
  document.fonts?.ready?.then(scheduleCorrection).catch(() => {});

  if (typeof ResizeObserver === "function") {
    observer = new ResizeObserver(scheduleCorrection);
    observer.observe(content);
  }

  publicAnchorSettleCleanup = cleanup;
  scheduleCorrection();
  requestAnimationFrame(() => requestAnimationFrame(scheduleCorrection));
  const timeout = window.setTimeout(cleanup, 6000);
  cleanups.push(() => clearTimeout(timeout));
}
function isBlankPublicSourceLine(target) {
  if (!target.matches("div.preview-source-line")) return false;
  return ![...target.childNodes].some(node => {
    if (node.nodeType === Node.TEXT_NODE) return Boolean(node.textContent?.trim());
    if (!(node instanceof Element)) return false;
    return !node.matches("br, .public-permalink");
  });
}
function installPublicPermalinks() {
  content.querySelectorAll(".preview-source-line[data-source-line]").forEach(target => {
    if (target.matches("hr") || isBlankPublicSourceLine(target) || target.querySelector(":scope > .public-permalink")) return;
    const line = Number(target.dataset.sourceLine);
    if (!Number.isSafeInteger(line) || line < 1) return;
    const heading = target.matches("h1[id], h2[id], h3[id], h4[id], h5[id], h6[id]");
    const anchor = document.createElement("a");
    anchor.className = "public-permalink";
    anchor.href = heading ? `#${encodeURIComponent(target.id)}` : `#L${line}`;
    anchor.dataset.line = String(line);
    anchor.dataset.linkKind = heading ? "heading" : "line";
    anchor.textContent = String(line);
    anchor.setAttribute("aria-label", heading ? `Copy link to heading on line ${line}` : `Copy link to line ${line}`);
    anchor.title = heading ? `Copy link to this heading (line ${line})` : `Copy link to line ${line}`;
    target.append(anchor);
  });
}
function setFullWidth(enabled, { persist = true } = {}) {
  const active = Boolean(enabled);
  document.body.classList.toggle("public-full-width", active);
  fullWidthToggle.checked = active;
  if (persist) {
    try { localStorage.setItem(fullWidthStorageKey, active ? "1" : "0"); } catch { }
  }
  requestAnimationFrame(() => alignPreviewLineNumbers(content));
}
function restoreFullWidth() {
  let enabled = false;
  try { enabled = localStorage.getItem(fullWidthStorageKey) === "1"; } catch { }
  setFullWidth(enabled, { persist: false });
}
async function initialize() {
  try {
    const page = await api(`/api/public/${encodeURIComponent(token)}`, { headers: pageHeaders() });
    if (passwordDialog.open) passwordDialog.close();
    passwordError.textContent = "";
    document.querySelector("#public-title").textContent = page.title;
    document.querySelector("#public-meta").textContent = `Updated: ${new Date(page.updated_at).toLocaleString("en-US")}${page.allow_task_updates ? " · tasks can be updated" : ""}`;
    document.title = `${page.title} · RustPad`;
    setMarkdownFiles(page.files || []);
    content.innerHTML = renderMarkdown(page.content);
    lockPublicContent(page.allow_task_updates);
    await Promise.all([renderMermaid(), renderCodeHighlight(), renderMediaPlayers()]);
    installPublicPermalinks();
    alignPreviewLineNumbers(content);
    settleInitialPublicAnchor(location.hash);
  } catch (error) {
    publicAnchorSettleCleanup?.();
    if (error.status === 401 || error.status === 403) {
      passwordError.textContent = error.status === 403 ? "Sign in with an authorized account or enter the resource password." : "Enter the correct password.";
      if (!passwordDialog.open) passwordDialog.showModal();
      passwordInput.focus();
      return;
    }
    content.replaceChildren();
    const message = document.createElement("p");
    message.className = "error";
    message.textContent = String(error.message);
    content.append(message);
  }
}
content.addEventListener("click", async event => {
  const link = event.target.closest('a[href^="#"]');
  if (!link || !content.contains(link)) return;
  const hash = link.getAttribute("href");
  event.preventDefault();
  if (!hash || hash === "#" || !scrollToPublicAnchor(hash, "smooth")) return;
  history.replaceState(null, "", `${location.pathname}${location.search}${hash}`);
  if (!link.classList.contains("public-permalink")) return;
  try {
    const href = link.dataset.linkKind === "heading" ? new URL(hash, location.href).href : lineLink(location.href, Number(link.dataset.line));
    await copyText(href);
    link.classList.add("is-copied");
    setTimeout(() => link.classList.remove("is-copied"), 900);
    toast(link.dataset.linkKind === "heading" ? "Heading link copied" : `Link to line ${link.dataset.line} copied`);
  } catch (error) { toast(error.message); }
});
window.addEventListener("hashchange", () => { publicAnchorSettleCleanup?.(); scrollToPublicAnchor(location.hash, "smooth"); });
content.addEventListener("change", async event => { const box = event.target.closest(".task-checkbox"); if (!box || box.disabled) return; const previous = !box.checked; box.disabled = true; try { const page = await api(`/api/public/${encodeURIComponent(token)}/tasks`, { method: "POST", headers: pageHeaders(), body: JSON.stringify({ source_line: Number(box.dataset.sourceLine), checked: box.checked }) }); document.querySelector("#public-meta").textContent = `Updated: ${new Date(page.updated_at).toLocaleString("en-US")} · tasks can be updated`; toast("Task saved"); } catch (error) { box.checked = previous; toast(error.message); } finally { box.disabled = false; } });
lineNumbersToggle.addEventListener("change", () => { document.body.classList.toggle("hide-preview-line-numbers", !lineNumbersToggle.checked); });
fullWidthToggle.addEventListener("change", () => setFullWidth(fullWidthToggle.checked));
window.addEventListener("resize", () => requestAnimationFrame(() => alignPreviewLineNumbers(content)));
passwordForm.addEventListener("submit", async event => { event.preventDefault(); pagePassword = passwordInput.value; await initialize(); });
passwordDialog.addEventListener("cancel", event => event.preventDefault());
document.querySelector("#copy-public-link").addEventListener("click", async () => { try { await copyText(location.href); toast("Link copied"); } catch (error) { toast(error.message); } });
initialize();