/* ObsiGate — Viewer module */
import { api, AuthManager } from './auth.js';
import { state } from './state.js';
import { escapeHtml, safeCreateIcons, safeHighlight, getFileIcon, openEditor, copyToClipboard, activateInlineEditor, detachInlineEditor } from './utils.js';
import { isInlineEditorActive, queryEditor } from './editor-inline.js';
import { TabManager, closeMobileSidebar, ContextMenuManager, RightSidebarManager, showToast, buildFrontmatterCard } from './ui.js';
import { syncActiveFileTreeItem, searchByTag, TagFilterService, refreshSidebarTreePreservingState, focusPathInSidebar } from './sidebar.js';
import { AutocompleteDropdown, performAdvancedSearch } from './search.js';
import { initDashboardTabs } from './sync.js';
import { renderMermaidBlocks } from './mermaid-viewer.js';
import { renderExcalidraw } from './excalidraw-viewer.js';
import { DashboardStatsWidget, DashboardRecentWidget, DashboardBookmarkWidget, DashboardSharedWidget, DashboardConflictsWidget } from './dashboard.js';
import { openShareDialog } from './config.js';
import { cacheViewedFile, getCachedFile } from './offline.js';
import { t } from './i18n.js';
import { onFileRender } from './plugins.js';
import { NowPlaying } from './now-playing.js';

// ── Multi-format export ────────────────────────────────────────────────────
// Downloads a file export (HTML / MD bundle / ePub) via the authenticated
// export endpoints, showing a loading toast while the request is in flight.
async function downloadExport(vault, path, format, fallbackName) {
  showToast(t("viewer.export_start"), "info");
  const url = `/api/export/${format}?vault=${encodeURIComponent(vault)}&path=${encodeURIComponent(path)}`;
  try {
    const headers = AuthManager.getAuthHeaders() || {};
    const res = await fetch(url, { credentials: "include", headers });
    if (!res.ok) {
      let detail = "";
      try { detail = (await res.json()).detail || ""; } catch (_) { /* ignore */ }
      throw new Error(detail || "HTTP " + res.status);
    }
    const blob = await res.blob();
    const a = document.createElement("a");
    a.href = URL.createObjectURL(blob);
    a.download = fallbackName;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    setTimeout(() => URL.revokeObjectURL(a.href), 1000);
    showToast(t("viewer.export_done"), "success");
  } catch (err) {
    console.error("Export error:", err);
    showToast(t("viewer.export_error") + " " + err.message, "error");
  }
}

// Close any open export dropdown when clicking elsewhere.
document.addEventListener("click", function (e) {
  if (e.target && e.target.closest && e.target.closest(".export-dropdown")) return;
  document.querySelectorAll(".export-menu").forEach(function (m) { m.style.display = "none"; });
});

// Pane-aware content area helper — delegates to PaneManager when split
function getContentArea() {
  // Override set by PaneTabManager._renderFileInPane for cross-module rendering
  if (window._activePaneContentArea) return window._activePaneContentArea;
  if (window.PaneManager && window.PaneManager.isSplit() && window.getActiveContentArea) {
    return window.getActiveContentArea();
  }
  return document.getElementById('content-area');
}
// ---------------------------------------------------------------------------
// Outline/TOC Manager
// ---------------------------------------------------------------------------

const OutlineManager = {
  /**
   * Slugify text to create valid IDs
   */
  slugify(text) {
    return (
      text
        .toLowerCase()
        .normalize("NFD")
        .replace(/[\u0300-\u036f]/g, "")
        .replace(/[^\p{L}\p{N}\s-]/gu, "")
        .replace(/\s+/g, "-")
        .replace(/-+/g, "-")
        .trim() || "heading"
    );
  },

  /**
   * Parse headings from markdown content
   */
  parseHeadings() {
    const contentArea = document.querySelector(".md-content");
    if (!contentArea) return [];

    const headings = [];
    const h2s = contentArea.querySelectorAll("h2");
    const h3s = contentArea.querySelectorAll("h3");
    const allHeadings = [...h2s, ...h3s].sort((a, b) => {
      return a.compareDocumentPosition(b) & Node.DOCUMENT_POSITION_FOLLOWING ? -1 : 1;
    });

    const usedIds = new Map();

    allHeadings.forEach((heading) => {
      const text = heading.textContent.trim();
      if (!text) return;

      const level = parseInt(heading.tagName[1]);
      let id = this.slugify(text);

      // Handle duplicate IDs
      if (usedIds.has(id)) {
        const count = usedIds.get(id) + 1;
        usedIds.set(id, count);
        id = `${id}-${count}`;
      } else {
        usedIds.set(id, 1);
      }

      // Inject ID into heading if not present
      if (!heading.id) {
        heading.id = id;
      } else {
        id = heading.id;
      }

      headings.push({
        id,
        level,
        text,
        element: heading,
      });
    });

    return headings;
  },

  /**
   * Render outline list
   */
  renderOutline(headings) {
    const outlineList = document.getElementById("outline-list");
    const outlineEmpty = document.getElementById("outline-empty");

    if (!outlineList) return;

    outlineList.innerHTML = "";

    if (!headings || headings.length === 0) {
      outlineList.hidden = true;
      if (outlineEmpty) {
        outlineEmpty.hidden = false;
        safeCreateIcons();
      }
      return;
    }

    outlineList.hidden = false;
    if (outlineEmpty) outlineEmpty.hidden = true;

    headings.forEach((heading) => {
      const item = el(
        "a",
        {
          class: `outline-item level-${heading.level}`,
          href: `#${heading.id}`,
          "data-heading-id": heading.id,
          role: "link",
        },
        [document.createTextNode(heading.text)],
      );

      item.addEventListener("click", (e) => {
        e.preventDefault();
        this.scrollToHeading(heading.id);
      });

      outlineList.appendChild(item);
    });

    state.headingsCache = headings;
  },

  /**
   * Scroll to heading with smooth behavior
   */
  scrollToHeading(headingId) {
    const heading = document.getElementById(headingId);
    if (!heading) return;

    const contentArea = getContentArea();
    if (!contentArea) return;

    // Calculate offset for fixed header (if any)
    const headerHeight = 80;
    const headingTop = heading.offsetTop;

    contentArea.scrollTo({
      top: headingTop - headerHeight,
      behavior: "smooth",
    });

    // Update active state immediately
    this.setActiveHeading(headingId);
  },

  /**
   * Set active heading in outline
   */
  setActiveHeading(headingId) {
    if (state.activeHeadingId === headingId) return;

    state.activeHeadingId = headingId;

    const items = document.querySelectorAll(".outline-item");
    items.forEach((item) => {
      if (item.getAttribute("data-heading-id") === headingId) {
        item.classList.add("active");
        item.setAttribute("aria-current", "location");
        // Scroll outline item into view
        item.scrollIntoView({ block: "nearest", behavior: "smooth" });
      } else {
        item.classList.remove("active");
        item.removeAttribute("aria-current");
      }
    });
  },

  /**
   * Initialize outline for current document
   */
  init() {
    const headings = this.parseHeadings();
    this.renderOutline(headings);
    ScrollSpyManager.init(headings);
    ReadingProgressManager.init();
  },

  /**
   * Cleanup
   */
  destroy() {
    ScrollSpyManager.destroy();
    ReadingProgressManager.destroy();
    state.headingsCache = [];
    state.activeHeadingId = null;
  },
};


// ---------------------------------------------------------------------------
// Scroll Spy Manager
// ---------------------------------------------------------------------------

const ScrollSpyManager = {
  observer: null,
  headings: [],

  init(headings) {
    this.destroy();
    this.headings = headings;

    if (!headings || headings.length === 0) return;

    const contentArea = getContentArea();
    if (!contentArea) return;

    const options = {
      root: contentArea,
      rootMargin: "-20% 0px -70% 0px",
      threshold: [0, 0.3, 0.5, 1.0],
    };

    this.observer = new IntersectionObserver((entries) => {
      // Find the most visible heading
      let mostVisible = null;
      let maxRatio = 0;

      entries.forEach((entry) => {
        if (entry.isIntersecting && entry.intersectionRatio > maxRatio) {
          maxRatio = entry.intersectionRatio;
          mostVisible = entry.target;
        }
      });

      if (mostVisible && mostVisible.id) {
        OutlineManager.setActiveHeading(mostVisible.id);
      }
    }, options);

    // Observe all headings
    headings.forEach((heading) => {
      if (heading.element) {
        this.observer.observe(heading.element);
      }
    });
  },

  destroy() {
    if (this.observer) {
      this.observer.disconnect();
      this.observer = null;
    }
    this.headings = [];
  },
};


// ---------------------------------------------------------------------------
// Reading Progress Manager
// ---------------------------------------------------------------------------

const ReadingProgressManager = {
  scrollHandler: null,

  init() {
    this.destroy();

    const contentArea = getContentArea();
    if (!contentArea) return;

    this.scrollHandler = this.throttle(() => {
      this.updateProgress();
    }, 100);

    contentArea.addEventListener("scroll", this.scrollHandler);
    this.updateProgress();
  },

  updateProgress() {
    const contentArea = getContentArea();
    const progressFill = document.getElementById("reading-progress-fill");
    const progressText = document.getElementById("reading-progress-text");

    if (!contentArea || !progressFill || !progressText) return;

    const scrollTop = contentArea.scrollTop;
    const scrollHeight = contentArea.scrollHeight;
    const clientHeight = contentArea.clientHeight;

    const maxScroll = scrollHeight - clientHeight;
    const percentage = maxScroll > 0 ? Math.round((scrollTop / maxScroll) * 100) : 0;

    progressFill.style.width = `${percentage}%`;
    progressText.textContent = `${percentage}%`;
  },

  throttle(func, delay) {
    let lastCall = 0;
    return function (...args) {
      const now = Date.now();
      if (now - lastCall >= delay) {
        lastCall = now;
        func.apply(this, args);
      }
    };
  },

  destroy() {
    const contentArea = getContentArea();
    if (contentArea && this.scrollHandler) {
      contentArea.removeEventListener("scroll", this.scrollHandler);
    }
    this.scrollHandler = null;

    // Reset progress
    const progressFill = document.getElementById("reading-progress-fill");
    const progressText = document.getElementById("reading-progress-text");
    if (progressFill) progressFill.style.width = "0%";
    if (progressText) progressText.textContent = "0%";
  },
};


// ---------------------------------------------------------------------------
// File viewer
// ---------------------------------------------------------------------------
export async function openFile(vaultName, filePath) {
  state.currentVault = vaultName;
  state.currentPath = filePath;
  state.showingSource = false;
  state.cachedRawSource = null;

  // Highlight active
  syncActiveFileTreeItem(vaultName, filePath);

  // Show loading state while fetching
  const area = getContentArea();
  area.innerHTML = '<div class="loading-indicator"><div class="loading-spinner"></div><div>Chargement...</div></div>';

  try {
    const url = `/api/file/${encodeURIComponent(vaultName)}?path=${encodeURIComponent(filePath)}`;
    const data = await api(url);
    // Cache the file for offline use
    if (data && !data.unsupported && data.content) {
      cacheViewedFile(vaultName, filePath, data.content, data.modified);
    }
    renderFile(data);
  } catch (err) {
    // Try IndexedDB fallback
    console.log('[Viewer] Network failed, trying offline cache:', err);
    const cached = await getCachedFile(vaultName, filePath);
    if (cached && cached.content) {
      const fakeData = {
        vault: vaultName,
        path: filePath,
        title: filePath.split('/').pop().replace(/\.md$/, ''),
        content: cached.content,
        html: null,
        raw_size: cached.content.length,
        modified: cached.modified || '',
        tags: [],
        offline: true
      };
      renderFile(fakeData);
      showToast(t('viewer.loaded_from_cache'), 'info');
    } else {
      area.innerHTML = '<div class="welcome"><p style="color:var(--text-muted)">Impossible de charger le fichier — vous etes hors-ligne et ce fichier n\'est pas en cache.</p></div>';
    }
  }
}

async function renderBacklinksPanel(vault, path, container) {
  try {
    const data = await api(`/api/file/${encodeURIComponent(vault)}/backlinks?path=${encodeURIComponent(path)}`);
    if (!data.backlinks || data.backlinks.length === 0) return;

    const panel = el("div", { class: "backlinks-panel" });
    const header = el("div", { class: "backlinks-header" }, [
      icon("link", 14),
      document.createTextNode(` ${data.total} lien(s) entrant(s)`),
    ]);
    panel.appendChild(header);

    const list = el("div", { class: "backlinks-list" });
    data.backlinks.forEach((bl) => {
      const item = el("div", { class: "backlink-item" });
      const vaultBadge = el("span", { class: "backlink-vault" }, [document.createTextNode(bl.vault)]);
      const titleEl = el("span", { class: "backlink-title" }, [document.createTextNode(bl.title || bl.path.split("/").pop().replace(/\.md$/i, ""))]);
      item.appendChild(icon(getFileIcon(bl.path), 12));
      item.appendChild(vaultBadge);
      item.appendChild(titleEl);
      item.addEventListener("click", () => TabManager.openPreview(bl.vault, bl.path));
      item.addEventListener("dblclick", (e) => { e.preventDefault(); TabManager.openPersistent(bl.vault, bl.path); });
      list.appendChild(item);
    });
    panel.appendChild(list);
    container.appendChild(panel);
  } catch (err) {
    // Silently ignore — backlinks are optional
    console.debug("Backlinks fetch failed:", err);
  }
}

// ── Pretty print (mode lecture enrichi pour fichiers texte non-markdown) ──
// Detecte le langage depuis le HTML deja rendu par le backend (classe
// language-xxx), formate le JSON, puis genere un bloc avec gouttiere de
// numeros de ligne. La coloration est appliquee ensuite via highlight.js.
function detectPrettyLang(data) {
  if (data.is_json || data.extension === ".json") return "json";
  const m = /class="language-([\w-]+)/.exec(data.html || "");
  return m ? m[1] : "plaintext";
}

function buildPrettyHtml(data, raw) {
  let text = raw;
  const lang = detectPrettyLang(data);
  if (lang === "json") {
    try { text = JSON.stringify(JSON.parse(raw), null, 2); } catch (_) { /* JSON invalide: on affiche brut */ }
  }
  const lines = text.split("\n");
  const gutter = lines.map((_, i) => `<span>${i + 1}</span>`).join("");
  return `<div class="pretty-view"><div class="pp-gutter" aria-hidden="true">${gutter}</div><pre class="pp-pre"><code class="language-${lang}">${escapeHtml(text)}</code></pre></div>`;
}

// Colorateur générique de secours: utilisé quand highlight.js ne produit
// aucun token (langage plaintext — .txt/.log —, langue absente du bundle,
// ou CDN hljs indisponible). Réutilise les classes hljs existantes (le
// thème CDN colore string/comment/number/attr) + classes .pp-* maison
// pour les niveaux de log qui n'ont pas d'équivalent sémantique hljs.
const PP_TOKEN_RE = /("[^"\n]*"?|'[^'\n]*'?|`[^`\n]*`?)|(^\s*(?:#|\/\/|;)\s.*$|\s+(?:#|\/\/)\s.*$)|\b(\d+(?:\.\d+)?)\b|\b(ERROR|FATAL|CRITICAL|SEVERE|WARN(?:ING)?|INFO|DEBUG|TRACE|NOTICE)\b|^(\s*[\w.\-\/ ]+)=(?=\S)|\b(true|false|null|None|TRUE|FALSE|NULL)\b/gm;

function ppClassFor(m) {
  if (m[1] !== undefined) return "hljs-string";
  if (m[2] !== undefined) return "hljs-comment";
  if (m[3] !== undefined) return "hljs-number";
  if (m[4] !== undefined) {
    const lvl = m[4];
    if (/ERROR|FATAL|CRITICAL|SEVERE/.test(lvl)) return "pp-level pp-err";
    if (/WARN/.test(lvl)) return "pp-level pp-warn";
    if (/INFO|NOTICE/.test(lvl)) return "pp-level pp-info";
    return "pp-level pp-debug";
  }
  if (m[5] !== undefined) return "hljs-attr";
  if (m[6] !== undefined) return "hljs-literal";
  return null;
}

function fallbackTokenize(text) {
  let out = "";
  let last = 0;
  PP_TOKEN_RE.lastIndex = 0;
  let m;
  while ((m = PP_TOKEN_RE.exec(text)) !== null) {
    if (m.index > last) out += escapeHtml(text.slice(last, m.index));
    const cls = ppClassFor(m);
    out += cls ? `<span class="${cls}">${escapeHtml(m[0])}</span>` : escapeHtml(m[0]);
    last = m.index + (m[0].length || 1);
    if (m[0].length === 0) PP_TOKEN_RE.lastIndex++; // garde anti-boucle infinie
  }
  out += escapeHtml(text.slice(last));
  return out;
}

// Applique la coloration: hljs (avec aliases de languages) si des tokens
// sortent, sinon fallback regex generique.
function applyPrettyHighlight(codeEl, lang, text) {
  safeHighlight(codeEl); // gerne les alias language-xxx inconnus de hljs
  const tokens = codeEl.querySelectorAll('[class^="hljs-"]').length;
  if (!tokens && text.trim()) {
    codeEl.innerHTML = fallbackTokenize(text);
    codeEl.classList.add("hljs");
  }
}

/**
 * Jump the inline PDF viewer to a specific page.
 *
 * The browser's built-in PDF viewer lives in an ``about:blank`` content window
 * (so ``contentWindow.location.hash`` never reaches the document) **and** it
 * ignores a same-document fragment navigation: changing only ``#page=N`` on the
 * iframe ``src`` does not move the page. A changing query parameter forces a
 * real reload, and the ``#page=N`` fragment is then honoured at load — the only
 * reliable way to target a page with the native viewer.
 *
 * @param {HTMLElement} area - Content area containing the ``.pdf-iframe``.
 * @param {string|number} page - 1-based page number from the PDF outline.
 */
export function navigatePdfToPage(area, page) {
  const iframe = area && area.querySelector('.pdf-iframe');
  if (!iframe || page === null || page === undefined || page === '') return;
  const base = iframe.getAttribute('data-pdf-url') || iframe.src.split('#')[0];
  iframe.setAttribute('data-pdf-url', base);
  const sep = base.includes('?') ? '&' : '?';
  iframe.src = `${base}${sep}_pdfpage=${Date.now()}#page=${page}`;
}

// ---------------------------------------------------------------------------
// Image viewer (roadmap #108-D)
// ---------------------------------------------------------------------------
const IMAGE_EXTS = new Set([".png", ".jpg", ".jpeg", ".gif", ".svg", ".webp", ".bmp", ".ico"]);
const IMAGE_ZOOM_MIN = 0.1;
const IMAGE_ZOOM_MAX = 8;
let _imageViewerCleanup = null;
// BUG-072 — lightbox / metadata-panel state, reset as soon as a non-image file
// is rendered. #111 — image→image navigation now happens **in place**, so the
// viewer (and these states) is no longer destroyed between siblings.
const _imageViewerState = { lightbox: false, meta: false };

/** Clamp a zoom factor into the supported [0.1, 8] range. */
export function clampImageZoom(value) {
  if (!Number.isFinite(value)) return 1;
  return Math.min(IMAGE_ZOOM_MAX, Math.max(IMAGE_ZOOM_MIN, value));
}

/** True when *p* has a viewable image extension. */
export function isImagePath(p) {
  const lower = (p || "").toLowerCase();
  const dot = lower.lastIndexOf(".");
  return dot !== -1 && IMAGE_EXTS.has(lower.slice(dot));
}

/** Build the byte-serving URL used by <img> / thumbnails. */
export function buildImageUrl(vault, path) {
  return `/api/image/${encodeURIComponent(vault)}?path=${encodeURIComponent(path)}`;
}

function buildThumbUrl(vault, path, size) {
  return `/api/media/${encodeURIComponent(vault)}/thumb?path=${encodeURIComponent(path)}&size=${size}`;
}

// #111 — directory listing cache. Opening / switching to another image must not
// hammer `/api/browse` (the filmstrip and the sibling list share one listing).
const _imageDirCache = new Map();
const IMAGE_DIR_CACHE_TTL = 15000;

/** List the viewable image siblings of *dir*, memoised for a short TTL. */
async function listImageSiblings(vault, dir) {
  const key = `${vault}\u0000${dir}`;
  const cached = _imageDirCache.get(key);
  if (cached && Date.now() - cached.ts < IMAGE_DIR_CACHE_TTL) return cached.items;
  const res = await api(`/api/browse/${encodeURIComponent(vault)}?path=${encodeURIComponent(dir)}`);
  const items = (res.items || []).filter((it) => it.type === "file" && isImagePath(it.path));
  _imageDirCache.set(key, { items, ts: Date.now() });
  return items;
}

const IMAGE_MIME = {
  ".png": "image/png",
  ".jpg": "image/jpeg",
  ".jpeg": "image/jpeg",
  ".gif": "image/gif",
  ".svg": "image/svg+xml",
  ".webp": "image/webp",
  ".bmp": "image/bmp",
  ".ico": "image/x-icon",
};

/** Best-effort MIME type for an image path (metadata panel). */
function imageMimeFor(path) {
  const lower = (path || "").toLowerCase();
  const dot = lower.lastIndexOf(".");
  return dot === -1 ? "" : IMAGE_MIME[lower.slice(dot)] || "";
}

function formatBytes(n) {
  if (!n && n !== 0) return "";
  if (n < 1024) return `${n} o`;
  if (n < 1048576) return `${(n / 1024).toFixed(1)} Ko`;
  return `${(n / 1048576).toFixed(1)} Mo`;
}

/**
 * Render a full image viewer: centered image, wheel zoom (0.1×–8×), drag pan,
 * double-click reset, ←/→ navigation between siblings, thumbnail filmstrip,
 * collapsible metadata panel and a full-viewport lightbox.
 */
export function renderImageViewer(area, data) {
  const vault = data.vault;
  // #111 — mutable current-image state: navigating swaps these in place instead
  // of re-rendering the whole viewer (which used to refetch the file + listing).
  let currentPath = data.path;
  let currentTitle = data.title || (currentPath || "").split("/").pop();
  let imgUrl = buildImageUrl(vault, currentPath);
  let currentMeta = {
    image_mime: data.image_mime || imageMimeFor(currentPath),
    size_bytes: data.size_bytes,
    modified: data.modified,
  };

  area.innerHTML = "";
  const container = el("div", { class: "image-viewer-container", tabindex: "0" });

  // ── Toolbar ────────────────────────────────────────────────────────────
  const toolbar = el("div", { class: "image-toolbar" });
  const titleEl = el("span", { class: "image-title", title: currentPath }, [
    document.createTextNode(currentTitle),
  ]);
  toolbar.appendChild(titleEl);
  toolbar.appendChild(el("div", { class: "image-toolbar-spacer" }));

  const counter = el("span", { class: "image-counter", hidden: true }, [document.createTextNode("")]);
  toolbar.appendChild(counter);
  const zoomBadge = el("span", { class: "image-zoom-badge" }, [document.createTextNode("100%")]);
  toolbar.appendChild(zoomBadge);

  const mkBtn = (iconName, label, cls) => {
    const b = el("button", { class: `btn-action${cls ? " " + cls : ""}`, type: "button", title: label, "aria-label": label }, [icon(iconName, 14)]);
    return b;
  };

  const zoomOutBtn = mkBtn("zoom-out", t("viewer.image_zoom_out"));
  const zoomInBtn = mkBtn("zoom-in", t("viewer.image_zoom_in"));
  const zoomResetBtn = mkBtn("rotate-ccw", t("viewer.image_zoom_reset"));
  const prevBtn = mkBtn("chevron-left", t("viewer.image_prev"));
  const nextBtn = mkBtn("chevron-right", t("viewer.image_next"));
  const originalBtn = mkBtn("external-link", t("viewer.image_open_original"));
  const downloadBtn = mkBtn("download", t("viewer.download"));
  const metaBtn = mkBtn("info", t("viewer.image_metadata"), "image-btn-metadata");
  const lightboxBtn = mkBtn("maximize", t("viewer.image_fullscreen"), "image-btn-lightbox");
  [prevBtn, nextBtn, zoomOutBtn, zoomInBtn, zoomResetBtn, metaBtn, originalBtn, downloadBtn, lightboxBtn]
    .forEach((b) => toolbar.appendChild(b));
  container.appendChild(toolbar);

  // ── Body: image stage + metadata sidebar (right) ───────────────────────
  const body = el("div", { class: "image-viewer-body" });
  const stage = el("div", { class: "image-stage" });
  const img = el("img", { class: "image-main", src: imgUrl, alt: currentTitle, draggable: "false" });
  stage.appendChild(img);

  // ── Overlay arrows along the frame edges (#111) ────────────────────────
  const prevArrow = el("button", {
    class: "image-nav-arrow image-nav-arrow-prev",
    type: "button",
    title: t("viewer.image_prev"),
    "aria-label": t("viewer.image_prev"),
    hidden: true,
  }, [icon("chevron-left", 32)]);
  const nextArrow = el("button", {
    class: "image-nav-arrow image-nav-arrow-next",
    type: "button",
    title: t("viewer.image_next"),
    "aria-label": t("viewer.image_next"),
    hidden: true,
  }, [icon("chevron-right", 32)]);
  stage.appendChild(prevArrow);
  stage.appendChild(nextArrow);
  body.appendChild(stage);

  // ── Metadata sidebar (kept open across ←/→ navigation) ─────────────────
  const metaPanel = el("div", { class: "image-meta-panel" });
  metaPanel.hidden = !_imageViewerState.meta;
  body.appendChild(metaPanel);
  container.appendChild(body);

  // ── Thumbnail filmstrip (navigation) ───────────────────────────────────
  // #112 — the film scrolls with the mouse wheel and two translucent edge
  // arrows; the scrollable strip is wrapped so the arrows stay fixed.
  const navWrap = el("div", { class: "image-nav", hidden: true });
  const strip = el("div", { class: "image-nav-strip" });
  const stripPrev = el("button", {
    class: "image-strip-arrow image-strip-arrow-prev",
    type: "button",
    title: t("viewer.image_strip_prev"),
    "aria-label": t("viewer.image_strip_prev"),
  }, [icon("chevron-left", 20)]);
  const stripNext = el("button", {
    class: "image-strip-arrow image-strip-arrow-next",
    type: "button",
    title: t("viewer.image_strip_next"),
    "aria-label": t("viewer.image_strip_next"),
  }, [icon("chevron-right", 20)]);
  navWrap.appendChild(strip);
  navWrap.appendChild(stripPrev);
  navWrap.appendChild(stripNext);
  container.appendChild(navWrap);

  let scale = 1;
  let tx = 0;
  let ty = 0;

  const applyTransform = () => {
    img.style.transform = `translate(${tx}px, ${ty}px) scale(${scale})`;
    zoomBadge.textContent = `${Math.round(scale * 100)}%`;
  };
  const resetView = () => { scale = 1; tx = 0; ty = 0; applyTransform(); };
  const setZoom = (next) => {
    scale = clampImageZoom(next);
    if (scale === 1) { tx = 0; ty = 0; }
    applyTransform();
  };

  const renderMeta = () => {
    const rows = [
      [t("viewer.image_type"), currentMeta.image_mime || ""],
      [t("viewer.image_dimensions"), img.naturalWidth ? `${img.naturalWidth} × ${img.naturalHeight}` : ""],
      [t("viewer.metadata_size"), formatBytes(currentMeta.size_bytes)],
      [t("viewer.metadata_path"), currentPath],
    ];
    if (currentMeta.modified) rows.push([t("viewer.metadata_modified"), currentMeta.modified]);
    metaPanel.innerHTML = "";
    const dl = el("dl", {});
    rows.forEach(([k, v]) => {
      dl.appendChild(el("dt", {}, [document.createTextNode(k)]));
      dl.appendChild(el("dd", {}, [document.createTextNode(v || "—")]));
    });
    metaPanel.appendChild(dl);
  };

  // ── Sibling navigation (in place, #111) ────────────────────────────────
  let siblings = [];
  let currentIndex = -1;
  let thumbs = [];
  const preloaded = new Set();

  const preload = (i) => {
    if (!siblings.length) return;
    const it = siblings[(i % siblings.length + siblings.length) % siblings.length];
    if (!it || preloaded.has(it.path)) return;
    preloaded.add(it.path);
    const pre = new Image();
    pre.src = buildImageUrl(vault, it.path);
  };

  const updateStripActive = () => {
    thumbs.forEach((thumb, i) => thumb.classList.toggle("active", i === currentIndex));
    const active = thumbs[currentIndex];
    if (!active) return;
    // Scroll the filmstrip only (never the document) to reveal the active thumb.
    const left = active.offsetLeft;
    const right = left + active.offsetWidth;
    if (left < strip.scrollLeft) strip.scrollLeft = Math.max(0, left - 8);
    else if (right > strip.scrollLeft + strip.clientWidth) strip.scrollLeft = right - strip.clientWidth + 8;
  };

  const updateArrows = () => {
    const multi = siblings.length > 1;
    prevArrow.hidden = nextArrow.hidden = prevBtn.disabled = nextBtn.disabled = !multi;
    prevArrow.disabled = nextArrow.disabled = !multi;
    counter.hidden = !multi;
    counter.textContent = multi ? `${currentIndex + 1} / ${siblings.length}` : "";
  };

  /** Swap to the sibling at *index* without rebuilding the viewer. */
  const showSibling = (index) => {
    const item = siblings[index];
    if (!item || item.path === currentPath) return;
    currentIndex = index;
    currentPath = item.path;
    currentTitle = item.name;
    imgUrl = buildImageUrl(vault, currentPath);
    currentMeta = {
      image_mime: imageMimeFor(currentPath),
      size_bytes: item.size,
      modified: null,
    };
    scale = 1; tx = 0; ty = 0;
    applyTransform();
    img.style.display = "";
    const errEl = stage.querySelector(".image-error");
    if (errEl) errEl.remove();
    img.alt = currentTitle;
    img.src = imgUrl;
    titleEl.textContent = currentTitle;
    titleEl.title = currentPath;
    updateStripActive();
    updateArrows();
    state.currentVault = vault;
    state.currentPath = currentPath;
    try { syncActiveFileTreeItem(vault, currentPath); } catch (_) { /* best-effort */ }
    preload(index - 1);
    preload(index + 1);
    if (!metaPanel.hidden) renderMeta();
  };

  const go = (delta) => {
    if (siblings.length < 2 || currentIndex < 0) return;
    showSibling((currentIndex + delta + siblings.length) % siblings.length);
  };

  const renderStrip = () => {
    if (siblings.length < 2) { navWrap.hidden = true; return; }
    navWrap.hidden = false;
    strip.innerHTML = "";
    thumbs = siblings.map((s, i) => {
      const thumb = el("img", {
        class: `image-thumb${i === currentIndex ? " active" : ""}`,
        src: buildThumbUrl(vault, s.path, 96),
        alt: s.name,
        title: s.name,
        loading: "lazy",
        decoding: "async",
      });
      thumb.addEventListener("click", () => showSibling(i));
      strip.appendChild(thumb);
      return thumb;
    });
    updateStripActive();
  };

  // #112 — scroll the film with the wheel (vertical → horizontal) and the
  // two overlay arrows; the active image never changes, only the strip view.
  const scrollStrip = (dir) => {
    strip.scrollBy({ left: dir * Math.max(140, strip.clientWidth * 0.8), behavior: "smooth" });
  };
  stripPrev.addEventListener("click", () => scrollStrip(-1));
  stripNext.addEventListener("click", () => scrollStrip(1));
  strip.addEventListener("wheel", (e) => {
    if (strip.scrollWidth <= strip.clientWidth) return;
    const delta = Math.abs(e.deltaY) > Math.abs(e.deltaX) ? e.deltaY : e.deltaX;
    strip.scrollLeft += delta;
    e.preventDefault();
  }, { passive: false });

  (async () => {
    try {
      const dir = currentPath.includes("/") ? currentPath.slice(0, currentPath.lastIndexOf("/")) : "";
      siblings = await listImageSiblings(vault, dir);
      currentIndex = siblings.findIndex((it) => it.path === currentPath);
      renderStrip();
      updateArrows();
      preload(currentIndex - 1);
      preload(currentIndex + 1);
    } catch (_) { /* navigation is best-effort */ }
  })();

  // ── Interactions ───────────────────────────────────────────────────────
  stage.addEventListener("wheel", (e) => {
    e.preventDefault();
    const factor = e.deltaY < 0 ? 1.15 : 1 / 1.15;
    setZoom(scale * factor);
  }, { passive: false });

  const isArrow = (e) => !!(e.target && e.target.closest && e.target.closest(".image-nav-arrow"));

  let dragging = false;
  let startX = 0;
  let startY = 0;
  let startTx = 0;
  let startTy = 0;
  stage.addEventListener("pointerdown", (e) => {
    if (e.button !== 0 || isArrow(e)) return;
    dragging = true;
    startX = e.clientX; startY = e.clientY; startTx = tx; startTy = ty;
    stage.classList.add("panning");
    if (stage.setPointerCapture) stage.setPointerCapture(e.pointerId);
  });
  stage.addEventListener("pointermove", (e) => {
    if (!dragging) return;
    tx = startTx + (e.clientX - startX);
    ty = startTy + (e.clientY - startY);
    applyTransform();
  });
  const endDrag = (e) => {
    dragging = false;
    stage.classList.remove("panning");
    if (stage.releasePointerCapture && e.pointerId != null) {
      try { stage.releasePointerCapture(e.pointerId); } catch (_) { /* already released */ }
    }
  };
  stage.addEventListener("pointerup", endDrag);
  stage.addEventListener("pointercancel", endDrag);
  stage.addEventListener("dblclick", (e) => { if (!isArrow(e)) resetView(); });

  const stopArrowPointer = (e) => e.stopPropagation();
  prevArrow.addEventListener("pointerdown", stopArrowPointer);
  nextArrow.addEventListener("pointerdown", stopArrowPointer);
  prevArrow.addEventListener("dblclick", stopArrowPointer);
  nextArrow.addEventListener("dblclick", stopArrowPointer);
  prevArrow.addEventListener("click", (e) => { e.stopPropagation(); go(-1); });
  nextArrow.addEventListener("click", (e) => { e.stopPropagation(); go(1); });

  zoomInBtn.addEventListener("click", () => setZoom(scale * 1.25));
  zoomOutBtn.addEventListener("click", () => setZoom(scale / 1.25));
  zoomResetBtn.addEventListener("click", resetView);
  prevBtn.addEventListener("click", () => go(-1));
  nextBtn.addEventListener("click", () => go(1));
  originalBtn.addEventListener("click", () => window.open(imgUrl, "_blank"));
  downloadBtn.addEventListener("click", () => {
    const dlUrl = `/api/file/${encodeURIComponent(vault)}/download?path=${encodeURIComponent(currentPath)}`;
    window.open(dlUrl, "_blank");
  });
  metaBtn.setAttribute("aria-pressed", _imageViewerState.meta ? "true" : "false");
  metaBtn.addEventListener("click", () => {
    _imageViewerState.meta = !_imageViewerState.meta;
    metaPanel.hidden = !_imageViewerState.meta;
    metaBtn.setAttribute("aria-pressed", _imageViewerState.meta ? "true" : "false");
    if (_imageViewerState.meta) renderMeta();
  });
  const syncLightbox = () => {
    container.classList.toggle("lightbox", _imageViewerState.lightbox);
    lightboxBtn.setAttribute("aria-pressed", _imageViewerState.lightbox ? "true" : "false");
  };
  syncLightbox();
  lightboxBtn.addEventListener("click", () => {
    _imageViewerState.lightbox = !_imageViewerState.lightbox;
    syncLightbox();
  });

  img.addEventListener("load", () => {
    img.style.display = "";
    const errEl = stage.querySelector(".image-error");
    if (errEl) errEl.remove();
    if (!metaPanel.hidden) renderMeta();
  });
  img.addEventListener("error", () => {
    img.style.display = "none";
    if (!stage.querySelector(".image-error")) {
      stage.appendChild(el("div", { class: "image-error" }, [document.createTextNode(t("viewer.image_error"))]));
    }
  });

  const onKey = (e) => {
    if (e.key === "ArrowLeft") { e.preventDefault(); go(-1); }
    else if (e.key === "ArrowRight") { e.preventDefault(); go(1); }
    else if (e.key === "+" || e.key === "=") { e.preventDefault(); setZoom(scale * 1.25); }
    else if (e.key === "-") { e.preventDefault(); setZoom(scale / 1.25); }
    else if (e.key === "0") { e.preventDefault(); resetView(); }
    else if (e.key === "Escape") {
      _imageViewerState.lightbox = false;
      syncLightbox();
    }
  };
  document.addEventListener("keydown", onKey);
  _imageViewerCleanup = () => document.removeEventListener("keydown", onKey);

  area.appendChild(container);
  safeCreateIcons();
  applyTransform();
  if (_imageViewerState.meta) renderMeta();
  try { container.focus({ preventScroll: true }); } catch (_) { /* non-fatal */ }
}

// #110 — Audio/video are handled by the global Now Playing controller
// (frontend/js/now-playing.js): a single shared media element is teleported
// between this inline view and a body-level dock, so playback survives tab,
// pane and page navigation. The inline branches below just hand over the
// surface; the legacy "stop on re-render" cleanup no longer applies.
export { formatMediaDuration, buildMediaUrl, renderFallback as renderMediaFallback } from "./now-playing.js";

/** Audio viewer (roadmap #109-B, made persistent by #110). */
export function renderAudioViewer(area, data) {
  NowPlaying.attachInline(area, data);
}

/** Video viewer (roadmap #109-C, made persistent by #110). */
export function renderVideoViewer(area, data) {
  NowPlaying.attachInline(area, data);
}


// ── Excel .xlsx — sheet tabs + editable cells ─────────────────────────────
// Cells are contenteditable; edits are collected per sheet and sent to
// PUT /api/file/{vault}/xlsx/save. Formula cells show their text and are
// never recalculated here.
//
// #153 A1/A4 — the read response carries `xlsx_lossy_features` (parts openpyxl
// drops on save): a banner lists them and the first save asks for an explicit
// confirmation before retrying with `force: true`. A value starting with "=" or
// "@" is stored as text unless the user turns the formula toggle on, so a typed
// `=cmd|…` cannot execute when the file is later opened in Excel.
export function renderXlsxViewer(area, data) {
  const sheets = data.xlsx_sheets || [];
  const lossy = data.xlsx_lossy_features || [];
  // Session-scoped state: once the lossy write is confirmed, the rest of the
  // session saves without asking again (never persisted — a confirmation is
  // per workbook, not a global preference).
  let lossyConfirmed = false;
  let allowFormula = false;
  const tabs = sheets.length > 1
    ? `<div class="xlsx-tabs">${sheets.map((s, i) =>
        `<button class="xlsx-tab${i === 0 ? " active" : ""}" data-sheet="${i}">${escapeHtml(s.name)}</button>`
      ).join("")}</div>`
    : "";
  const panels = sheets.map((s, i) =>
    `<div class="xlsx-panel" data-sheet="${i}"${i === 0 ? "" : ' style="display:none"'}>${s.html}</div>`
  ).join("");
  const lossWarning = lossy.length
    ? `<div class="xlsx-warning" role="note">
         <i data-lucide="alert-triangle" class="xlsx-warning-icon"></i>
         <div class="xlsx-warning-body">
           <strong>${escapeHtml(t("xlsx.lossy_title"))}</strong>
           <span class="xlsx-warning-list">${lossy
             .map((f) => `<span class="xlsx-warning-tag">${escapeHtml(t("xlsx.feature_" + f))}</span>`)
             .join("")}</span>
           <span class="xlsx-warning-hint">${escapeHtml(t("xlsx.lossy_hint"))}</span>
         </div>
       </div>`
    : "";

  area.innerHTML = `
    <div class="xlsx-viewer">
      <div class="xlsx-toolbar">
        ${tabs}
        <span class="xlsx-toolbar-actions">
          <button class="btn-action xlsx-formula-toggle" id="xlsx-formula-btn" type="button"
                  aria-pressed="false" title="${escapeHtml(t("xlsx.formula_toggle_title"))}">f(x)</button>
          <button class="btn-action" id="xlsx-save-btn" disabled>${t("common.save")}</button>
          <button class="btn-action" id="xlsx-download-btn">
            <i data-lucide="download" style="width:14px;height:14px"></i> ${t("viewer.download")}
          </button>
        </span>
      </div>
      ${lossWarning}
      <div class="xlsx-panels">${panels}</div>
    </div>`;

  const saveBtn = area.querySelector("#xlsx-save-btn");
  const panelEls = [...area.querySelectorAll(".xlsx-panel")];
  const dirtyCount = () => area.querySelectorAll("td.xlsx-dirty").length;
  const refreshSaveState = () => { saveBtn.disabled = dirtyCount() === 0; };

  // Editable cells: Enter blurs, Escape reverts, paste stays single-line.
  area.querySelectorAll(".xlsx-table td").forEach((td) => {
    td.contentEditable = "true";
    td.spellcheck = false;
    td.dataset.orig = td.textContent;
    td.addEventListener("input", () => {
      td.classList.add("xlsx-dirty");
      refreshSaveState();
    });
    td.addEventListener("keydown", (e) => {
      if (e.key === "Enter") { e.preventDefault(); td.blur(); }
      if (e.key === "Escape") {
        td.textContent = td.dataset.orig;
        td.classList.remove("xlsx-dirty");
        refreshSaveState();
      }
    });
    td.addEventListener("paste", (e) => {
      e.preventDefault();
      const text = (e.clipboardData || window.clipboardData).getData("text").replace(/\r?\n/g, " ");
      document.execCommand("insertText", false, text);
    });
  });

  area.querySelectorAll(".xlsx-tab").forEach((tab) => {
    tab.addEventListener("click", () => {
      const idx = tab.dataset.sheet;
      area.querySelectorAll(".xlsx-tab").forEach((x) => x.classList.toggle("active", x === tab));
      panelEls.forEach((p) => { p.style.display = p.dataset.sheet === idx ? "" : "none"; });
    });
  });

  // Formula toggle (#153 A4) — opt-in for this viewing session only.
  const formulaBtn = area.querySelector("#xlsx-formula-btn");
  formulaBtn.addEventListener("click", () => {
    allowFormula = !allowFormula;
    formulaBtn.setAttribute("aria-pressed", String(allowFormula));
    formulaBtn.classList.toggle("active", allowFormula);
  });

  const putSheet = (job, force) => api(
    `/api/file/${encodeURIComponent(data.vault)}/xlsx/save?path=${encodeURIComponent(data.path)}`,
    {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ ...job, allow_formula: allowFormula, force }),
    },
  );

  saveBtn.addEventListener("click", async () => {
    // One PUT per sheet (dirty cells can span tabs before a save).
    const jobs = panelEls
      .map((panel) => {
        const cells = {};
        panel.querySelectorAll("td.xlsx-dirty").forEach((td) => { cells[td.dataset.cell] = td.textContent; });
        return { sheet: sheets[Number(panel.dataset.sheet)].name, cells };
      })
      .filter((job) => Object.keys(job.cells).length);
    if (!jobs.length) return;
    saveBtn.disabled = true;
    try {
      for (const job of jobs) {
        // 409 xlsx_lossy_content → confirm once, then retry with force: true.
        // (Also covers a workbook that became lossy while it was open.)
        let force = lossyConfirmed;
        for (;;) {
          try {
            await putSheet(job, force);
            break;
          } catch (err) {
            if (err && err.code === "xlsx_lossy_content" && !lossyConfirmed) {
              const features = (err.details && err.details.features) || lossy;
              const labels = features.map((f) => t("xlsx.feature_" + f)).join(", ");
              if (!confirm(t("xlsx.lossy_confirm", { features: labels }))) throw err;
              lossyConfirmed = true;
              force = true;
              continue;
            }
            throw err;
          }
        }
      }
      area.querySelectorAll("td.xlsx-dirty").forEach((td) => {
        td.classList.remove("xlsx-dirty");
        td.dataset.orig = td.textContent;
      });
      refreshSaveState();
      showToast(t("editor.saved"), "success");
    } catch (err) {
      refreshSaveState();
      // A refused confirmation is a decision, not a failure: neutral toast.
      if (err && err.code === "xlsx_lossy_content") {
        showToast(t("xlsx.lossy_cancelled"), "info");
      } else {
        showToast(`${t("editor.save_error")}: ${err.message || err}`, "error");
      }
    }
  });

  area.querySelector("#xlsx-download-btn").addEventListener("click", () => {
    window.open(`/api/file/${encodeURIComponent(data.vault)}/download?path=${encodeURIComponent(data.path)}`, "_blank");
  });

  safeCreateIcons();
}

export function renderFile(data) {
  // #93 — An inline edition session (#editor-container mounted in the content
  // area) is destroyed by this very re-render: release it first so the editor
  // state (CodeMirror view, Forge iframe, Yjs session) is torn down cleanly
  // instead of being wiped mid-session by a tab switch / sidebar click.
  if (isInlineEditorActive()) detachInlineEditor();
  // #108 — release the image viewer's document-level shortcuts before swapping
  // the content area (otherwise they leak on every re-render).
  if (_imageViewerCleanup) { _imageViewerCleanup(); _imageViewerCleanup = null; }
  // BUG-072 / #111 — any render that is not an image viewer starts from a clean
  // viewer. Image→image navigation now happens in place (see renderImageViewer),
  // so the viewer is never rebuilt between siblings.
  if (!data.is_image) {
    _imageViewerState.lightbox = false;
    _imageViewerState.meta = false;
  }
  const area = getContentArea();
  // #110 — if this render is about to replace the surface that currently hosts
  // the shared media element, hand it back to the persistent dock first.
  NowPlaying.handleRender(area, data);

  // Handle PDF files — render in iframe with TOC sidebar
  if (data.is_pdf) {
    const pdfUrl = `/api/file/${encodeURIComponent(data.vault)}/pdf/stream?path=${encodeURIComponent(data.path)}`;
    const pages = data.pdf_metadata && data.pdf_metadata.pages ? data.pdf_metadata.pages : '?';
    const toc = data.pdf_toc || [];

    let tocHtml = '';
    if (toc.length > 0) {
      tocHtml = '<div class="pdf-toc"><h3>Table des matières</h3><ul>';
      for (const item of toc) {
        const indent = (item.level - 1) * 16;
        tocHtml += `<li style="padding-left:${indent}px"><a href="#" data-page="${item.page}">${escapeHtml(item.title)}</a> <span class="toc-page">p.${item.page}</span></li>`;
      }
      tocHtml += '</ul></div>';
    }

    area.innerHTML = `
      <div class="pdf-viewer-container">
        <div class="pdf-toolbar">
          <span class="pdf-info">PDF — ${pages} pages</span>
          <button class="btn-action" data-pdf-url="${pdfUrl}">
            <i data-lucide="external-link" style="width:14px;height:14px"></i> Plein écran
          </button>
          <button class="btn-action" data-download-url="/api/file/${encodeURIComponent(data.vault)}/download?path=${encodeURIComponent(data.path)}">
            <i data-lucide="download" style="width:14px;height:14px"></i> Télécharger
          </button>
        </div>
        <div class="pdf-body">
          ${tocHtml}
          <iframe src="${pdfUrl}" data-pdf-url="${pdfUrl}" class="pdf-iframe" title="${escapeHtml(data.title)}"></iframe>
        </div>
      </div>`;
    area.querySelectorAll('.pdf-toolbar .btn-action').forEach((btn) => {
      btn.addEventListener('click', () => {
        window.open(btn.dataset.pdfUrl || btn.dataset.downloadUrl, '_blank');
      });
    });
    area.querySelectorAll('.pdf-toc a[data-page]').forEach((link) => {
      link.addEventListener('click', (e) => {
        e.preventDefault();
        navigatePdfToPage(area, link.getAttribute('data-page'));
      });
    });
    lucide.createIcons();
    return;
  }

  // Handle Excel .xlsx — editable table view (display / edit / download)
  if (data.is_xlsx) {
    renderXlsxViewer(area, data);
    return;
  }

  // Handle Excalidraw — render in iframe editor
  if (data.is_excalidraw) {
    renderExcalidraw(area, data, data.vault, data.path);
    return;
  }

  // Handle images — dedicated zoom/pan viewer (roadmap #108-D)
  if (data.is_image) {
    renderImageViewer(area, data);
    return;
  }

  // Handle audio / video — native HTML5 players (roadmap #109)
  if (data.is_audio) {
    renderAudioViewer(area, data);
    return;
  }
  if (data.is_video) {
    renderVideoViewer(area, data);
    return;
  }

  // Handle unsupported (binary) files
  if (data.unsupported) {
    const sizeStr = data.size_bytes
      ? data.size_bytes < 1024 ? `${data.size_bytes} o`
      : data.size_bytes < 1048576 ? `${(data.size_bytes / 1024).toFixed(1)} Ko`
      : `${(data.size_bytes / 1048576).toFixed(1)} Mo`
      : "";
    area.innerHTML = `
      <div class="unsupported-file">
        <i data-lucide="file" style="width:48px;height:48px"></i>
        <div class="filename">${escapeHtml(data.path.split("/").pop())}</div>
        <div>${data.media_too_large ? escapeHtml(t("viewer.media_too_large")) : "Ce fichier est binaire et ne peut pas être affiché."}</div>
        ${sizeStr ? `<div style="font-size:0.85rem;margin-top:4px">Taille : ${sizeStr}</div>` : ""}
        <button class="btn-action" id="unsupported-download-btn">
          <i data-lucide="download" style="width:14px;height:14px"></i> Télécharger
        </button>
      </div>`;
    lucide.createIcons();
    document.getElementById("unsupported-download-btn").addEventListener("click", () => {
      const dlUrl = `/api/file/${encodeURIComponent(data.vault)}/download?path=${encodeURIComponent(data.path)}`;
      window.open(dlUrl, "_blank");
    });
    return;
  }

  // Breadcrumb
  const parts = data.path.split("/");
  const breadcrumbEls = [];
  breadcrumbEls.push(
    makeBreadcrumbSpan(data.vault, () => {
      focusPathInSidebar(data.vault, "", { alignToTop: "center" });
    }),
  );
  let accumulated = "";
  parts.forEach((part, i) => {
    breadcrumbEls.push(el("span", { class: "sep" }, [document.createTextNode(" / ")]));
    accumulated += (accumulated ? "/" : "") + part;
    const p = accumulated;
    if (i < parts.length - 1) {
      breadcrumbEls.push(
        makeBreadcrumbSpan(part, () => {
          focusPathInSidebar(data.vault, p, { alignToTop: "center" });
        }),
      );
    } else {
      breadcrumbEls.push(
        makeBreadcrumbSpan(part.replace(/\.md$/i, ""), () => {
          focusPathInSidebar(data.vault, data.path, { alignToTop: "center" });
        }),
      );
    }
  });

  const breadcrumb = el("div", { class: "breadcrumb" }, breadcrumbEls);

  // Tags
  const tagsDiv = el("div", { class: "file-tags" });
  (data.tags || []).forEach((tag) => {
    if (!TagFilterService.isTagFiltered(tag)) {
      const t = el("span", { class: "file-tag" }, [document.createTextNode(`#${tag}`)]);
      t.addEventListener("click", () => searchByTag(tag));
      tagsDiv.appendChild(t);
    }
  });

  // Action buttons
  // Cache local au rendu courant: state.cachedRawSource global est fiable
  // uniquement quand openFile() initialise le fichier (il le réinitialise).
  // Or le contenu d'un onglet peut être rendu via renderFile() direct sans
  // passer par openFile() — un cache partagé transporterait le contenu du
  // fichier précédent (bug pretty print sur fichiers successifs).
  let localRaw = null;
  const getRaw = async () => {
    if (localRaw != null) return localRaw;
    if (state.currentVault === data.vault && state.currentPath === data.path && state.cachedRawSource) {
      localRaw = state.cachedRawSource;
      return localRaw;
    }
    const rawUrl = `/api/file/${encodeURIComponent(data.vault)}/raw?path=${encodeURIComponent(data.path)}`;
    const rawData = await api(rawUrl);
    localRaw = rawData.raw;
    return localRaw;
  };
  const copyBtn = el("button", { class: "btn-action", title: "Copier la source" }, [icon("copy", 14), document.createTextNode("Copier")]);
  copyBtn.addEventListener("click", async () => {
    try {
      const rawSrc = await getRaw();
      if (navigator.clipboard) {
        await navigator.clipboard.writeText(rawSrc);
      } else {
        // Fallback for non-secure contexts
        const ta = document.createElement("textarea");
        ta.value = rawSrc;
        ta.style.position = "fixed"; ta.style.opacity = "0";
        document.body.appendChild(ta); ta.select();
        document.execCommand("copy");
        document.body.removeChild(ta);
      }
      copyBtn.lastChild.textContent = t('viewer.copied');
      setTimeout(() => (copyBtn.lastChild.textContent = t('viewer.copy')), 1500);
    } catch (err) {
      console.error("Copy error:", err);
      showToast(t("viewer.copy_error"), "error");
    }
  });

  const sourceBtn = el("button", { class: "btn-action", title: "Voir la source" }, [icon("code", 14), document.createTextNode("Source")]);

  // Download raw file button (extension shown; .md label for markdown)
  const mdBtn = el("button", { class: "btn-action", title: t("viewer.download_file") || t("viewer.download_md") }, [icon("file-text", 14), document.createTextNode(data.extension || ".md")]);
  mdBtn.addEventListener("click", () => {
    const dlUrl = `/api/file/${encodeURIComponent(data.vault)}/download?path=${encodeURIComponent(data.path)}`;
    const a = document.createElement("a");
    a.href = dlUrl;
    a.download = data.path.split("/").pop();
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
  });

  // PDF download button
  const pdfBtn = el("button", { class: "btn-action", title: t("viewer.download_pdf") }, [icon("file", 14), document.createTextNode("PDF")]);
  pdfBtn.addEventListener("click", () => {
    const pdfUrl = `/api/file/${encodeURIComponent(data.vault)}/pdf?path=${encodeURIComponent(data.path)}`;
    window.open(pdfUrl, "_blank");
  });

  // Export dropdown button (HTML / MD bundle / ePub)
  const exportWrap = el("div", { class: "export-dropdown", style: "position:relative;display:inline-block" });
  const exportBtn = el("button", { class: "btn-action", title: t("viewer.export_title") }, [icon("download", 14), document.createTextNode(t("viewer.export"))]);
  const exportMenu = el("div", { class: "export-menu", style: "display:none;position:absolute;right:0;top:100%;z-index:1000;min-width:200px;padding:4px;background:var(--bg,#fff);border:1px solid #ccc;border-radius:6px;box-shadow:0 6px 16px rgba(0,0,0,.18)" });
  const exportOptions = [
    { format: "html", icon: "file-code", label: t("viewer.export_html"), ext: ".html" },
    { format: "md-bundle", icon: "archive", label: t("viewer.export_md_bundle"), ext: ".zip" },
    { format: "epub", icon: "book-open", label: t("viewer.export_epub"), ext: ".epub" },
  ];
  exportOptions.forEach((opt) => {
    const item = el("button", { class: "export-menu-item", style: "display:flex;align-items:center;gap:8px;width:100%;padding:8px 10px;border:none;background:none;cursor:pointer;border-radius:4px;text-align:left;font-size:13px" }, [
      icon(opt.icon, 14),
      document.createTextNode(opt.label),
    ]);
    item.addEventListener("mouseenter", () => { item.style.background = "rgba(128,128,128,.15)"; });
    item.addEventListener("mouseleave", () => { item.style.background = "none"; });
    item.addEventListener("click", () => {
      exportMenu.style.display = "none";
      const baseName = data.path.split("/").pop().replace(/\.[^.]+$/, "") || "document";
      downloadExport(data.vault, data.path, opt.format, baseName + opt.ext);
    });
    exportMenu.appendChild(item);
  });
  exportBtn.addEventListener("click", (e) => {
    e.stopPropagation();
    exportMenu.style.display = exportMenu.style.display === "block" ? "none" : "block";
  });
  exportWrap.appendChild(exportBtn);
  exportWrap.appendChild(exportMenu);

  const editBtn = el("button", { class: "btn-action", title: "Editer" }, [icon("edit", 14), document.createTextNode("Editer")]);
  editBtn.addEventListener("click", () => {
    openEditor(data.vault, data.path);
  });

  const forgeBtn = el("button", { class: "btn-action btn-forge", title: t("viewer.forge_title") }, [icon("hammer", 14), document.createTextNode("Forge")]);
  forgeBtn.addEventListener("click", () => {
    var modal = document.getElementById("editor-modal");
    var bodyEl = document.getElementById("editor-body");
    // Set editor state so parent buttons work
    state.editorVault = data.vault;
    state.editorPath = data.path;
    // #93 — Forge replaces the document read view when this file is the one
    // currently displayed; otherwise it falls back to the overlay.
    var inline = activateInlineEditor(data.vault, data.path);
    if (!inline) {
      // A stale inline session (another document) must release the area first.
      detachInlineEditor();
      state.editorVault = data.vault;
      state.editorPath = data.path;
    }
    // Update header: show "Forge" brand + filename (the header travels with the
    // container in inline mode — query it wherever it lives, #93)
    var brand = queryEditor(".editor-brand");
    var titleInp = document.getElementById("editor-title-input");
    var fileInp = document.getElementById("editor-filename-input");
    if (brand) brand.textContent = t("viewer.forge_brand");
    if (titleInp) { titleInp.value = data.title || ''; titleInp.placeholder = t('forge.title_placeholder'); }
    if (fileInp) fileInp.value = data.path.split('/').pop();
    bodyEl.innerHTML = "";
    bodyEl.style.overflow = "hidden";
    var iframe = document.createElement("iframe");
    iframe.id = "forge-iframe";
    iframe.src = "/editor-poc?vault=" + encodeURIComponent(data.vault) + "&path=" + encodeURIComponent(data.path) + "&_ts=" + Date.now();
    // #101 — allow the Forge editor's own Fullscreen button to work.
    iframe.setAttribute("allow", "fullscreen");
    iframe.setAttribute("allowfullscreen", "");
    // Inline: the iframe fills the content area; overlay: the original 82vh.
    iframe.style.cssText = "width:100%;height:" + (inline ? "100%" : "82vh") + ";border:none;display:block;";
    bodyEl.appendChild(iframe);
    modal.classList.add("active");
    safeCreateIcons();
  });

  const openNewWindowBtn = el("button", { class: "btn-action", title: t("forge.popout") }, [icon("external-link", 14), document.createTextNode(t("forge.popout_label"))]);
  openNewWindowBtn.addEventListener("click", () => {
    const theme = document.documentElement.getAttribute('data-theme') || 'dark';
    const popoutUrl = `/popout/${encodeURIComponent(data.vault)}/${encodeURIComponent(data.path)}?theme=${theme}`;
    window.open(popoutUrl, `popout_${data.vault}_${data.path.replace(/[^a-zA-Z0-9]/g, "_")}`, "width=1000,height=700,menubar=no,toolbar=no,location=no,status=no,resizable=yes,scrollbars=no");
  });

  const tocBtn = el("button", { class: "btn-action", id: "toc-toggle-btn", title: "Afficher/Masquer le sommaire" }, [icon("list", 14), document.createTextNode("TOC")]);
  tocBtn.addEventListener("click", () => {
    RightSidebarManager.toggle();
  });

  // Share button — check if already shared
  const shareBtn = el("button", { class: "btn-action btn-share", title: "Partager ce document" }, [icon("share-2", 14), document.createTextNode("Partager")]);
  // Check if already shared and color the button
  (async () => {
    try {
      const shares = await api("/api/shares");
      if (shares.some(s => s.vault === data.vault && s.path === data.path)) {
        shareBtn.classList.add("shared");
        shareBtn.title = t('viewer.shared_doc_title');
      }
    } catch (e) { /* ignore */ }
  })();
  shareBtn.addEventListener("click", () => openShareDialog(data.vault, data.path));

  // Bookmark button — check if already bookmarked
  const bookmarkBtn = el("button", { class: "btn-action btn-bookmark", title: t("viewer.bookmark_toggle") }, [icon("bookmark-plus", 14), document.createTextNode("Bookmark")]);
  // Check bookmark status and color the button
  (async () => {
    try {
      const bms = await api("/api/bookmarks");
      if (Array.isArray(bms) && bms.some(b => b.vault === data.vault && b.path === data.path)) {
        bookmarkBtn.classList.add("active");
        bookmarkBtn.title = t("viewer.bookmark_remove");
      }
    } catch (e) { /* ignore */ }
  })();
  bookmarkBtn.addEventListener("click", async () => {
    try {
      const res = await api("/api/bookmarks/toggle", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ vault: data.vault, path: data.path, title: data.title }) });
      bookmarkBtn.classList.toggle("active", res.bookmarked);
      bookmarkBtn.title = res.bookmarked ? t("viewer.bookmark_remove") : t("viewer.bookmark_add");
      showToast(res.bookmarked ? "Ajouté aux bookmarks" : "Retiré des bookmarks", "success");
      if (typeof DashboardBookmarkWidget !== "undefined") DashboardBookmarkWidget.load();
    } catch (err) { showToast("Erreur: " + err.message, "error"); }
  });

  // Frontmatter — Accent Card
  let fmSection = null;
  if (data.frontmatter && Object.keys(data.frontmatter).length > 0) {
    fmSection = buildFrontmatterCard(data.frontmatter);
  }

  // Content container (rendered HTML)
  const mdDiv = el("div", { class: "md-content", id: "file-rendered-content" });
  mdDiv.innerHTML = data.html;

  // Raw source container (hidden initially)
  const rawDiv = el("div", { class: "raw-source-view", id: "file-raw-content", style: "display:none" });

  // Source button toggle logic
  sourceBtn.addEventListener("click", async () => {
    const rendered = document.getElementById("file-rendered-content");
    const raw = document.getElementById("file-raw-content");
    if (!rendered || !raw) return;

    state.showingSource = !state.showingSource;
    if (state.showingSource) {
      sourceBtn.classList.add("active");
      raw.textContent = await getRaw();
      rendered.style.display = "none";
      raw.style.display = "block";
    } else {
      sourceBtn.classList.remove("active");
      rendered.style.display = "block";
      raw.style.display = "none";
    }
  });

  // Pretty print — mode lecture enrichi (numeros de ligne + coloration)
  // pour les fichiers texte non-markdown (code, JSON, configs, logs...)
  let prettyBtn = null;
  const isTextViewerFile = !data.is_markdown && !data.is_csv && !data.unsupported && !data.is_pdf && !data.is_image && !data.is_excalidraw;
  if (isTextViewerFile) {
    prettyBtn = el("button", { class: "btn-action", title: t("viewer.pretty_title") || "Mode formaté avec couleurs et numéros de ligne" }, [icon("sparkles", 14), document.createTextNode(t("viewer.pretty") || "Pretty")]);
    prettyBtn.addEventListener("click", async () => {
      const on = !prettyBtn.classList.contains("active");
      if (on) {
        let rawText = "";
        try {
          rawText = await getRaw();
        } catch (_) {
          rawText = mdDiv.textContent || "";
        }
        mdDiv.innerHTML = buildPrettyHtml(data, rawText);
        const codeEl = mdDiv.querySelector("code");
        applyPrettyHighlight(codeEl, detectPrettyLang(data), rawText);
        prettyBtn.classList.add("active");
      } else {
        mdDiv.innerHTML = data.html;
        mdDiv.querySelectorAll("pre code").forEach((block) => safeHighlight(block));
        prettyBtn.classList.remove("active");
      }
    });
  }

  // Separateur visuel entre les groupes d'actions (#90)
  const actionSep = () => el("span", { class: "action-sep" });
  // Ordre des boutons par groupes fonctionnels (#90) :
  // markdown :    [TOC][pop-out][Bookmark] | [Editer][Source][.md][Forge] | [Copier][PDF][Export] | [Partager]
  // texte autre : [pop-out][Bookmark] | [Editer][Source][.ext][Pretty] | [Copier] | [Partager]
  // Boutons non applicables au type de fichier (TOC hors markdown, Pretty hors
  // texte, PDF/Export hors markdown, ...) restent ancres a leur groupe ;
  // spacer de groupe vide retire.
  const navBtns = [];
  if (data.is_markdown) navBtns.push(tocBtn);
  navBtns.push(openNewWindowBtn, bookmarkBtn);
  const editBtns = [];
  if (!data.unsupported) editBtns.push(editBtn);
  editBtns.push(sourceBtn);
  if (!data.is_image) editBtns.push(mdBtn);
  if (data.is_markdown) editBtns.push(forgeBtn);
  if (prettyBtn) editBtns.push(prettyBtn);
  const exportBtns = [copyBtn];
  if (data.is_markdown) exportBtns.push(pdfBtn, exportWrap);
  const shareBtns = [shareBtn];
  const fileActions = [];
  [navBtns, editBtns, exportBtns, shareBtns].forEach((group) => {
    if (group.length === 0) return;
    if (fileActions.length > 0) fileActions.push(actionSep());
    group.forEach((b) => fileActions.push(b));
  });

  // Assemble
  area.innerHTML = "";
  area.appendChild(breadcrumb);
  area.appendChild(el("div", { class: "file-header" }, [el("div", { class: "file-title" }, [document.createTextNode(data.title)]), tagsDiv]));
  // #115 — the action bar is a direct child of the scroll container (wrapped in
  // `.file-toolbar`) so it can stay pinned while long documents scroll; nested
  // inside `.file-header` it would stop sticking as soon as the header left the
  // viewport.
  area.appendChild(el("div", { class: "file-toolbar" }, [el("div", { class: "file-actions" }, fileActions)]));
  if (fmSection) area.appendChild(fmSection);
  area.appendChild(mdDiv);
  area.appendChild(rawDiv);

  // Backlinks panel
  if (data.is_markdown) {
    renderBacklinksPanel(data.vault, data.path, area);
  }

  // Highlight code blocks
  area.querySelectorAll("pre code").forEach((block) => {
    safeHighlight(block);
  });

  // Add copy buttons to code blocks
  area.querySelectorAll("pre").forEach((pre) => {
    if (pre.parentElement?.classList.contains("code-block-wrapper")) return;
    const wrapper = el("div", { class: "code-block-wrapper" }, []);
    wrapper.style.position = "relative";
    pre.replaceWith(wrapper);
    wrapper.appendChild(pre);

    const btn = el("button", { class: "copy-code-btn", title: "Copier le code" }, [document.createTextNode("Copier")]);
    btn.addEventListener("click", (e) => {
      e.stopPropagation();
      const code = pre.querySelector("code")?.textContent || pre.textContent;
      const copied = copyToClipboard(code);
      if (copied) {
        btn.textContent = "✓ Copié";
        btn.classList.add("copied");
        if (typeof showToast === "function") showToast("Code copié dans le presse-papiers", "success");
        setTimeout(() => { btn.textContent = "Copier"; btn.classList.remove("copied"); }, 2000);
      } else {
        if (typeof showToast === "function") showToast("Erreur lors de la copie", "error");
      }
    });
    wrapper.appendChild(btn);
  });

  // Render Mermaid diagrams
  renderMermaidBlocks(area);

  // Wire up wikilinks
  area.querySelectorAll(".wikilink").forEach((link) => {
    link.addEventListener("click", (e) => {
      e.preventDefault();
      const v = link.getAttribute("data-vault");
      const p = link.getAttribute("data-path");
      if (v && p) TabManager.openPreview(v, p);
    });
  });

  safeCreateIcons();
  area.scrollTop = 0;

  // Initialize outline/TOC for this document
  OutlineManager.init();

  // Plugin hooks: onFileRender — allow plugins to transform the rendered
  // content or append custom widgets beneath it. Async + non-blocking so a
  // slow/failed plugin never delays the normal file render.
  if (data.content && data.is_markdown) {
    onFileRender(data.vault, data.content, data.path).then((fr) => {
      if (!fr) return;
      if (typeof fr.replace === 'string' && fr.replace !== data.content) {
        const rendered = document.getElementById('file-rendered-content');
        if (rendered) rendered.innerHTML = fr.replace;
      }
      if (Array.isArray(fr.append) && fr.append.length > 0) {
        const out = el('div', { class: 'plugin-render-output' });
        fr.append.forEach((html) => {
          const w = el('div', { class: 'plugin-widget' });
          w.innerHTML = html;
          out.appendChild(w);
        });
        area.appendChild(out);
        safeCreateIcons();
      }
    }).catch(() => { /* plugins must never break rendering */ });
  }
}


// ---------------------------------------------------------------------------
// Helpers (escapeHtml imported from utils.js)
// ---------------------------------------------------------------------------
export function el(tag, attrs, children) {
  const e = document.createElement(tag);
  if (attrs) {
    Object.entries(attrs).forEach(([k, v]) => {
      // Skip boolean false for standard HTML boolean attributes to avoid setAttribute("checked", "false") bug
      if (v === false && (k === "checked" || k === "disabled" || k === "hidden" || k === "required" || k === "readonly")) {
        return;
      }
      e.setAttribute(k, v);
    });
  }
  if (children) {
    children.forEach((c) => {
      if (c) e.appendChild(c);
    });
  }
  return e;
}

export function icon(name, size) {
  const i = document.createElement("i");
  i.setAttribute("data-lucide", name);
  i.style.width = size + "px";
  i.style.height = size + "px";
  i.classList.add("icon");
  return i;
}

export function smallBadge(count) {
  const s = document.createElement("span");
  s.className = "badge-small";
  s.style.cssText = "font-size:0.68rem;color:var(--text-muted);margin-left:4px";
  s.textContent = `(${count})`;
  return s;
}

function getContextMenuPositionFromElement(target) {
  const rect = target.getBoundingClientRect();
  return {
    x: Math.min(rect.right - 8, window.innerWidth - 16),
    y: Math.min(rect.top + rect.height / 2, window.innerHeight - 16),
  };
}

export function attachTreeItemActionButton(itemEl, vault, path, type, isReadonly) {
  const button = document.createElement("button");
  button.type = "button";
  button.className = "tree-item-action-btn";
  button.setAttribute("aria-label", "Afficher le menu d’actions");
  button.setAttribute("title", "Actions");
  const iconEl = icon("more-vertical", 16);
  button.appendChild(iconEl);
  button.addEventListener("click", (e) => {
    e.preventDefault();
    e.stopPropagation();
    const pos = getContextMenuPositionFromElement(button);
    ContextMenuManager.show(pos.x, pos.y, vault, path, type, isReadonly);
  });
  itemEl.appendChild(button);
  // Ensure Lucide icons are rendered for the button
  setTimeout(() => {
    safeCreateIcons();
  }, 0);
}

export function attachTreeItemLongPress(itemEl, getMenuData) {
  let pressTimer = null;
  let pressHandled = false;
  let startX = 0;
  let startY = 0;
  const longPressDelay = 550;
  const moveThreshold = 10;

  const clearPressTimer = () => {
    if (pressTimer) {
      clearTimeout(pressTimer);
      pressTimer = null;
    }
  };

  itemEl.addEventListener("touchstart", (e) => {
    if (!e.touches || e.touches.length !== 1) return;
    pressHandled = false;
    startX = e.touches[0].clientX;
    startY = e.touches[0].clientY;
    clearPressTimer();
    pressTimer = setTimeout(() => {
      const data = getMenuData();
      if (!data) return;
      pressHandled = true;
      ContextMenuManager.show(startX, startY, data.vault, data.path, data.type, data.isReadonly);
    }, longPressDelay);
  }, { passive: true });

  itemEl.addEventListener("touchmove", (e) => {
    if (!e.touches || e.touches.length !== 1) return;
    const dx = Math.abs(e.touches[0].clientX - startX);
    const dy = Math.abs(e.touches[0].clientY - startY);
    if (dx > moveThreshold || dy > moveThreshold) {
      clearPressTimer();
    }
  }, { passive: true });

  itemEl.addEventListener("touchend", () => {
    clearPressTimer();
  }, { passive: true });

  itemEl.addEventListener("touchcancel", () => {
    clearPressTimer();
  }, { passive: true });

  itemEl.addEventListener("click", (e) => {
    if (pressHandled) {
      e.preventDefault();
      e.stopPropagation();
      setTimeout(() => {
        pressHandled = false;
      }, 0);
    }
  }, true);
}

export function getVaultIcon(vaultName, size = 16) {
  const v = state.allVaults.find((val) => val.name === vaultName);
  const type = v ? v.type : "VAULT";

  if (type === "DIR") {
    const i = icon("folder", size);
    i.style.color = "#eab308"; // yellow tint
    return i;
  } else {
    const purple = "#8b5cf6";
    const svgNS = "http://www.w3.org/2000/svg";
    const svg = document.createElementNS(svgNS, "svg");
    svg.setAttribute("xmlns", svgNS);
    svg.setAttribute("width", size);
    svg.setAttribute("height", size);
    svg.setAttribute("viewBox", "0 0 24 24");
    svg.setAttribute("fill", "none");
    svg.setAttribute("stroke", purple);
    svg.setAttribute("stroke-width", "2");
    svg.setAttribute("stroke-linecap", "round");
    svg.setAttribute("stroke-linejoin", "round");
    svg.classList.add("icon");

    const path1 = document.createElementNS(svgNS, "path");
    path1.setAttribute("d", "M6 3h12l4 6-10 12L2 9z");
    const path2 = document.createElementNS(svgNS, "path");
    path2.setAttribute("d", "M11 3 8 9l4 12");
    const path3 = document.createElementNS(svgNS, "path");
    path3.setAttribute("d", "M12 21l4-12-3-6");
    const path4 = document.createElementNS(svgNS, "path");
    path4.setAttribute("d", "M2 9h20");

    svg.appendChild(path1);
    svg.appendChild(path2);
    svg.appendChild(path3);
    svg.appendChild(path4);
    return svg;
  }
}

function makeBreadcrumbSpan(text, onClick) {
  const s = document.createElement("span");
  s.textContent = text;
  if (onClick) {
    s.addEventListener("click", async (event) => {
      event.preventDefault();
      if (s.dataset.busy === "true") return;
      s.dataset.busy = "true";
      s.style.pointerEvents = "none";
      try {
        await onClick(event);
      } finally {
        s.dataset.busy = "false";
        s.style.pointerEvents = "";
      }
    });
  }
  return s;
}

export function appendHighlightedText(container, text, query, caseSensitive) {
  container.textContent = "";
  if (!query) {
    container.appendChild(document.createTextNode(text));
    return;
  }

  const source = caseSensitive ? text : text.toLowerCase();
  const needle = caseSensitive ? query : query.toLowerCase();
  let start = 0;
  let index = source.indexOf(needle, start);

  if (index === -1) {
    container.appendChild(document.createTextNode(text));
    return;
  }

  while (index !== -1) {
    if (index > start) {
      container.appendChild(document.createTextNode(text.slice(start, index)));
    }
    const mark = el("mark", { class: "filter-highlight" }, [document.createTextNode(text.slice(index, index + query.length))]);
    container.appendChild(mark);
    start = index + query.length;
    index = source.indexOf(needle, start);
  }

  if (start < text.length) {
    container.appendChild(document.createTextNode(text.slice(start)));
  }
}

export function highlightSearchText(container, text, query, caseSensitive) {
  container.textContent = "";
  if (!query || !text) {
    container.appendChild(document.createTextNode(text || ""));
    return;
  }

  const source = caseSensitive ? text : text.toLowerCase();
  const needle = caseSensitive ? query : query.toLowerCase();
  let start = 0;
  let index = source.indexOf(needle, start);

  if (index === -1) {
    container.appendChild(document.createTextNode(text));
    return;
  }

  while (index !== -1) {
    if (index > start) {
      container.appendChild(document.createTextNode(text.slice(start, index)));
    }
    const mark = el("mark", { class: "search-highlight" }, [document.createTextNode(text.slice(index, index + query.length))]);
    container.appendChild(mark);
    start = index + query.length;
    index = source.indexOf(needle, start);
  }

  if (start < text.length) {
    container.appendChild(document.createTextNode(text.slice(start)));
  }
}

export function showWelcome() {
  hideProgressBar();

  // Restore or rebuild the dashboard with tabbed sections
  const area = getContentArea();
  // #110 — keep playing media alive if the dashboard replaces its surface.
  NowPlaying.handleRender(area, null);
  const home = document.getElementById("dashboard-home");

  if (area && !home) {
    area.innerHTML = `
      <div id="dashboard-home" class="dashboard-home" role="region" aria-label="Tableau de bord">
        <!-- Dashboard Tabs -->
        <div class="dashboard-tabs">
          <button class="dashboard-tab active" data-tab="stats" data-i18n="dashboard.stats">
            <i data-lucide="bar-chart-3" style="width:14px;height:14px"></i> ${t('dashboard.stats')}
          </button>
          <button class="dashboard-tab" data-tab="bookmarks" data-i18n="dashboard.bookmarks">
            <i data-lucide="bookmark" style="width:14px;height:14px"></i> ${t('dashboard.bookmarks')}
          </button>
          <button class="dashboard-tab" data-tab="recent" data-i18n="dashboard.tab_recent">
            <i data-lucide="clock" style="width:14px;height:14px"></i> ${t('dashboard.tab_recent')}
          </button>
          <button class="dashboard-tab" data-tab="shared" data-i18n="dashboard.tab_shared">
            <i data-lucide="share-2" style="width:14px;height:14px"></i> ${t('dashboard.tab_shared')}
          </button>
        </div>

        <!-- Stats Panel -->
        <div id="dashboard-panel-stats" class="dashboard-panel active">
          <div id="dashboard-stats-grid" class="dashboard-stats-grid">
            <div class="dashboard-stats-loading" data-i18n="common.loading">${t('common.loading')}</div>
          </div>
          <div id="dashboard-conflicts-container" style="margin-top:16px"></div>
        </div>

        <!-- Bookmarks Panel -->
        <div id="dashboard-panel-bookmarks" class="dashboard-panel">
          <div id="dashboard-bookmarks-grid" class="dashboard-recent-grid"></div>
          <div id="dashboard-bookmarks-empty" class="dashboard-recent-empty">
            <i data-lucide="pin"></i>
            <span data-i18n="dashboard.no_bookmarks">${t('dashboard.no_bookmarks')}</span>
            <p data-i18n="dashboard.pin_hint">${t('dashboard.pin_hint')}</p>
          </div>
        </div>

        <!-- Recent Panel -->
        <div id="dashboard-panel-recent" class="dashboard-panel">
          <div class="dashboard-header">
            <div class="dashboard-title-row">
              <span id="dashboard-count" class="dashboard-badge"></span>
            </div>
          </div>
          <div id="dashboard-recent-grid" class="dashboard-recent-grid"></div>
          <div id="dashboard-loading" class="dashboard-loading">
            <div class="skeleton-card"></div><div class="skeleton-card"></div><div class="skeleton-card"></div>
            <div class="skeleton-card"></div><div class="skeleton-card"></div><div class="skeleton-card"></div>
          </div>
          <div id="dashboard-recent-empty" class="dashboard-recent-empty hidden">
            <i data-lucide="inbox"></i>
            <span data-i18n="dashboard.no_recent">${t('dashboard.no_recent')}</span>
            <p data-i18n="dashboard.recent_hint">${t('dashboard.recent_hint')}</p>
          </div>
        </div>

        <!-- Shared Panel -->
        <div id="dashboard-panel-shared" class="dashboard-panel">
          <div id="dashboard-shared-grid" class="dashboard-recent-grid"></div>
          <div id="dashboard-shared-empty" class="dashboard-recent-empty">
            <i data-lucide="share-2"></i>
            <span data-i18n="dashboard.no_shares">${t('dashboard.no_shares')}</span>
            <p data-i18n="dashboard.shared_hint">${t('dashboard.shared_hint')}</p>
          </div>
        </div>
      </div>`;

    // Re-initialize widgets and dashboard tabs
    if (typeof DashboardRecentWidget !== "undefined") {
      DashboardRecentWidget.init();
    }
    initDashboardTabs();
    safeCreateIcons();
  } else if (home) {
    // Dashboard already exists, show it with default tab
    home.style.display = "";
    // Reset tabs to default
    document.querySelectorAll(".dashboard-tab").forEach(t => t.classList.remove("active"));
    document.querySelectorAll(".dashboard-panel").forEach(p => p.classList.remove("active"));
    const defaultTab = document.querySelector('.dashboard-tab[data-tab="stats"]');
    const defaultPanel = document.getElementById("dashboard-panel-stats");
    if (defaultTab) defaultTab.classList.add("active");
    if (defaultPanel) defaultPanel.classList.add("active");
  }

  // Load all widgets (they handle missing elements gracefully)
  if (typeof DashboardStatsWidget !== "undefined") {
    DashboardStatsWidget.load();
  }
  if (typeof DashboardConflictsWidget !== "undefined") {
    DashboardConflictsWidget.load();
  }
  if (typeof DashboardRecentWidget !== "undefined") {
    DashboardRecentWidget.load(state.selectedContextVault);
  }
  if (typeof DashboardBookmarkWidget !== "undefined") {
    DashboardBookmarkWidget.load(state.selectedContextVault);
  }
  if (typeof DashboardSharedWidget !== "undefined") {
    DashboardSharedWidget.load();
  }

  // Load saved searches sidebar
  loadSavedSearches();
}

export async function loadSavedSearches() {
  const list = document.getElementById("saved-searches-list");
  const empty = document.getElementById("saved-searches-empty");
  if (!list) return;
  try {
    const searches = await api("/api/saved-searches");
    // Initialise la barre de filtres même quand la liste est vide
    // (sinon les pills n'ont pas de listener au clic).
    _initSavedFilter();
    if (!searches.length) {
      list.innerHTML = "";
      if (empty) empty.style.display = "";
      return;
    }
    if (empty) empty.style.display = "none";
    list.innerHTML = searches.map(s => {
      // Detect directory-based saved search (empty query + include_paths)
      var isDirSearch = (!s.query || s.query.trim() === '') && s.include_paths;
      var displayQuery = isDirSearch ? (s.include_paths || 'Dossier') : escapeHtml(s.query);
      // Icon: folder-search for directories, search for regular queries
      var typeIcon = isDirSearch
        ? '<i data-lucide="folder-search" style="width:14px;height:14px;color:var(--accent)" class="saved-search-type-icon"></i>'
        : '<i data-lucide="search" style="width:14px;height:14px;color:var(--text-muted)" class="saved-search-type-icon"></i>';
      const badges = [];
      if (s.case_sensitive) badges.push('<span class="search-filter-badge">Aa</span>');
      if (s.whole_word) badges.push('<span class="search-filter-badge">wd</span>');
      if (s.regex) badges.push('<span class="search-filter-badge">.*</span>');
      const pathFilters = [];
      if (s.include_paths) pathFilters.push(`<span class="saved-search-path" title="Inclure: ${escapeHtml(s.include_paths)}">📥 ${escapeHtml(s.include_paths)}</span>`);
      if (s.exclude_paths) pathFilters.push(`<span class="saved-search-path" title="Exclure: ${escapeHtml(s.exclude_paths)}">📤 ${escapeHtml(s.exclude_paths)}</span>`);
      const vaultStr = s.vault && s.vault !== "all" ? `<span class="saved-search-vault">📁 ${escapeHtml(s.vault)}</span>` : "";
      return `
      <div class="saved-search-item${isDirSearch ? ' saved-search-dir' : ''}" data-type="${isDirSearch ? 'directory' : 'search'}">
        <div class="saved-search-query">${displayQuery}</div>
        <div class="saved-search-meta">
          <span class="saved-search-badges">${badges.join("")} ${vaultStr}</span>
          ${typeIcon}
        </div>
        ${pathFilters.length ? '<div class="saved-search-filters">' + pathFilters.join(" ") + '</div>' : ""}
        <button class="saved-search-delete" data-id="${s.id}" title="Supprimer">✕</button>
      </div>
    `}).join("");
    // Apply saved filter
    _applySavedFilter();
    // Set up filter bar (once)
    _initSavedFilter();
    list.querySelectorAll(".saved-search-item").forEach(item => {
      item.addEventListener("click", (e) => {
        if (e.target.classList.contains("saved-search-delete")) return;
        const idx = Array.from(list.children).indexOf(item);
        const s = searches[idx];
        if (!s) return;
        // Apply the saved search
        const input = document.getElementById("search-input");
        if (input) input.value = s.query;
        state.searchCaseSensitive = s.case_sensitive || false;
        state.searchWholeWord = s.whole_word || false;
        state.searchRegex = s.regex || false;
        if (typeof _updateToggleUI === "function") _updateToggleUI();
        if (s.include_paths) {
          const incl = document.getElementById("search-include-input");
          if (incl) incl.value = s.include_paths;
        }
        if (s.exclude_paths) {
          const excl = document.getElementById("search-exclude-input");
          if (excl) excl.value = s.exclude_paths;
        }
        // Execute the search — suppress dropdown from appearing
        AutocompleteDropdown.hide();
        AutocompleteDropdown._suppressNext = true;
        const vault = s.vault || "all";
        if (input) { input.dispatchEvent(new Event("input")); }
        clearTimeout(state.searchTimeout);
        state.advancedSearchOffset = 0;
        performAdvancedSearch(s.query, vault, null);
      });
    });
    list.querySelectorAll(".saved-search-delete").forEach(b => b.addEventListener("click", async (e) => {
      e.stopPropagation();
      await api(`/api/saved-searches/${b.dataset.id}`, { method: "DELETE" });
      loadSavedSearches();
    }));
    safeCreateIcons();
  } catch (err) { /* silently ignore */ }
}

export function showLoading() {
  const area = getContentArea();
  area.innerHTML = `
    <div class="loading-indicator">
      <div class="loading-spinner"></div>
      <div>Recherche en cours...</div>
    </div>`;
  showProgressBar();
}

export function showProgressBar() {
  const bar = document.getElementById("search-progress-bar");
  if (bar) bar.classList.add("active");
}

export function hideProgressBar() {
  const bar = document.getElementById("search-progress-bar");
  if (bar) bar.classList.remove("active");
}

function goHome() {
  const searchInput = document.getElementById("search-input");
  if (searchInput) searchInput.value = "";

  document.querySelectorAll(".tree-item.active").forEach((el) => el.classList.remove("active"));

  state.currentVault = null;
  state.currentPath = null;
  state.showingSource = false;
  state.cachedRawSource = null;

  closeMobileSidebar();
  showWelcome();
}


// ---------------------------------------------------------------------------
// SSE Client — IndexUpdateManager
// ---------------------------------------------------------------------------
const IndexUpdateManager = (() => {
  let eventSource = null;
  let reconnectTimer = null;
  let reconnectDelay = 1000;
  const MAX_RECONNECT_DELAY = 30000;
  let recentEvents = [];
  const MAX_RECENT_EVENTS = 20;
  let connectionState = "disconnected"; // disconnected | connecting | connected

  function connect() {
    if (eventSource) {
      eventSource.close();
    }
    connectionState = "connecting";
    _updateBadge();

    eventSource = new EventSource("/api/events");

    eventSource.addEventListener("connected", (e) => {
      connectionState = "connected";
      reconnectDelay = 1000;
      _updateBadge();
    });

    eventSource.addEventListener("index_updated", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("index_updated", data);
        _onIndexUpdated(data);
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.addEventListener("index_reloaded", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("index_reloaded", data);
        _onIndexReloaded(data);
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.addEventListener("vault_added", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("vault_added", data);
        showToast(`Vault "${data.vault}" ajouté (${data.stats.file_count} fichiers)`, "info");
        loadVaults();
        loadTags();
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.addEventListener("vault_removed", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("vault_removed", data);
        showToast(`Vault "${data.vault}" supprimé`, "info");
        loadVaults();
        loadTags();
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.addEventListener("index_start", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("index_start", data);
        connectionState = "syncing";
        _updateBadge();
        showToast(`Indexation démarrée (${data.total_vaults} vaults)`, "info");
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.addEventListener("index_progress", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("index_progress", data);
        connectionState = "syncing";
        _updateBadge();
        loadVaults();
        loadTags();
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.addEventListener("index_complete", (e) => {
      try {
        const data = JSON.parse(e.data);
        _addEvent("index_complete", data);
        connectionState = "connected";
        _updateBadge();
        showToast(`Indexation terminée (${data.total_files} fichiers)`, "success");
        loadVaults();
        loadTags();
      } catch (err) {
        console.error("SSE parse error:", err);
      }
    });

    eventSource.onerror = () => {
      connectionState = "disconnected";
      _updateBadge();
      eventSource.close();
      eventSource = null;
      _scheduleReconnect();
    };
  }

  function _scheduleReconnect() {
    if (reconnectTimer) clearTimeout(reconnectTimer);
    reconnectTimer = setTimeout(() => {
      reconnectDelay = Math.min(reconnectDelay * 2, MAX_RECONNECT_DELAY);
      connect();
    }, reconnectDelay);
  }

  function _addEvent(type, data) {
    recentEvents.unshift({
      type,
      data,
      timestamp: new Date().toISOString(),
    });
    if (recentEvents.length > MAX_RECENT_EVENTS) {
      recentEvents = recentEvents.slice(0, MAX_RECENT_EVENTS);
    }
  }

  async function _onIndexUpdated(data) {
    // Brief syncing state
    connectionState = "syncing";
    _updateBadge();

    const n = data.total_changes || 0;
    const vaults = (data.vaults || []).join(", ");
    // Toast removed: silent auto-indexing — no notification needed

    // Refresh sidebar and tags if affected vault matches current context
    const affectsCurrentVault = state.selectedContextVault === "all" || (data.vaults || []).includes(state.selectedContextVault);
    if (affectsCurrentVault) {
      try {
        await Promise.all([refreshSidebarTreePreservingState(), refreshTagsForContext()]);
        // Refresh current file if it was updated
        if (state.currentVault && state.currentPath) {
          const changed = (data.changes || []).some((c) => c.vault === state.currentVault && c.path === state.currentPath);
          if (changed) {
            openFile(state.currentVault, state.currentPath);
          }
        }
      } catch (err) {
        console.error("Error refreshing after index update:", err);
      }
    }

    // Refresh recent tab if it is active
    if (state.activeSidebarTab === "recent") {
      const vaultFilter = document.getElementById("recent-vault-filter");
      loadRecentFiles(vaultFilter ? vaultFilter.value || null : null);
    }

    setTimeout(() => {
      connectionState = "connected";
      _updateBadge();
    }, 1500);
  }

  async function _onIndexReloaded(data) {
    connectionState = "syncing";
    _updateBadge();
    showToast(t("sync.index_reloaded"), "info");
    try {
      await Promise.all([loadVaults(), loadTags()]);
    } catch (err) {
      console.error("Error refreshing after full reload:", err);
    }
    setTimeout(() => {
      connectionState = "connected";
      _updateBadge();
    }, 1500);
  }

  function _updateBadge() {
    const badge = document.getElementById("sync-badge");
    if (!badge) return;
    badge.className = "sync-badge sync-badge--" + connectionState;
    const labels = {
      disconnected: "Déconnecté",
      connecting: "Connexion...",
      connected: "Synchronisé",
      syncing: t("viewer.syncing"),
    };
    badge.title = labels[connectionState] || connectionState;
  }

  function disconnect() {
    if (eventSource) {
      eventSource.close();
      eventSource = null;
    }
    if (reconnectTimer) {
      clearTimeout(reconnectTimer);
      reconnectTimer = null;
    }
    connectionState = "disconnected";
    _updateBadge();
  }

  function getState() {
    return connectionState;
  }

  function getRecentEvents() {
    return recentEvents;
  }

  return { connect, disconnect, getState, getRecentEvents };
})();

function initSyncStatus() {
  const badge = document.getElementById("sync-badge");
  if (!badge) return;

  badge.addEventListener("click", (e) => {
    e.stopPropagation();
    toggleSyncPanel();
  });

  IndexUpdateManager.connect();
}

function toggleSyncPanel() {
  let panel = document.getElementById("sync-panel");
  if (panel) {
    panel.remove();
    return;
  }
  // Auto reconnect if disconnected when user opens the panel
  if (IndexUpdateManager.getState() === "disconnected") {
    IndexUpdateManager.connect();
  }
  panel = document.createElement("div");
  panel.id = "sync-panel";
  panel.className = "sync-panel";
  _renderSyncPanel(panel);
  document.body.appendChild(panel);

  // Close on outside click
  setTimeout(() => {
    document.addEventListener("click", _closeSyncPanelOutside, { once: true });
  }, 0);
}

function _closeSyncPanelOutside(e) {
  const panel = document.getElementById("sync-panel");
  if (panel && !panel.contains(e.target) && e.target.id !== "sync-badge") {
    panel.remove();
  }
}

function _renderSyncPanel(panel) {
  const state = IndexUpdateManager.getState();
  const events = IndexUpdateManager.getRecentEvents();

  const stateLabels = {
    disconnected: "Déconnecté",
    connecting: "Connexion...",
    connected: "Connecté",
    syncing: "Synchronisation...",
  };

  let html = `<div class="sync-panel__header">
    <span class="sync-panel__title">Synchronisation</span>
    <span class="sync-panel__state sync-panel__state--${state}">${stateLabels[state] || state}</span>
  </div>`;

  if (events.length === 0) {
    html += `<div class="sync-panel__empty">Aucun événement récent</div>`;
  } else {
    html += `<div class="sync-panel__events">`;
    events.slice(0, 10).forEach((ev) => {
      const time = new Date(ev.timestamp).toLocaleTimeString();
      const typeLabels = {
        index_updated: t("viewer.index_updated"),
        index_reloaded: "Rechargement",
        vault_added: t("sync.vault_added_label"),
        vault_removed: t("sync.vault_removed_label"),
        index_start: t("viewer.index_start"),
        index_progress: t("sync.vault_indexed_label"),
        index_complete: "Indexation tech.",
      };
      const label = typeLabels[ev.type] || ev.type;
      let detail = ev.data.vaults ? ev.data.vaults.join(", ") : ev.data.vault || "";
      if (ev.type === "index_start") detail = `${ev.data.total_vaults} vaults à traiter`;
      if (ev.type === "index_progress") detail = `${ev.data.vault} (${ev.data.files} fichiers)`;
      if (ev.type === "index_complete" && ev.data.total_files !== undefined) detail = `${ev.data.total_files} fichiers total`;
      html += `<div class="sync-panel__event">
        <span class="sync-panel__event-type">${label}</span>
        <span class="sync-panel__event-detail">${detail}</span>
        <span class="sync-panel__event-time">${time}</span>
      </div>`;
    });
    html += `</div>`;
  }
}

// ── Saved searches filter ──
var _savedFilterType = 'all';
var _savedFilterInitDone = false;
var _savedQuery = '';

function _savedNorm(value) {
  return String(value || '')
    .normalize('NFD')
    .replace(/[\u0300-\u036f]/g, '')
    .toLowerCase();
}

function _initSavedFilter() {
  if (_savedFilterInitDone) return;
  var bar = document.getElementById('saved-filter-bar');
  if (!bar) return;
  bar.querySelectorAll('.saved-filter-pill').forEach(function(btn) {
    btn.addEventListener('click', function() {
      bar.querySelectorAll('.saved-filter-pill').forEach(function(b) { b.classList.remove('active'); });
      btn.classList.add('active');
      _savedFilterType = btn.dataset.filter;
      _applySavedFilter();
    });
  });
  _savedFilterInitDone = true;
}

/** #99 — Filter the saved-searches list by the global sidebar filter input. */
export function filterSavedSearches(query) {
  _savedQuery = (query || '').trim();
  _applySavedFilter();
}

function _applySavedFilter() {
  var items = document.querySelectorAll('.saved-search-item');
  var list = document.getElementById('saved-searches-list');
  var q = _savedNorm(_savedQuery);
  var hasVisible = false;
  items.forEach(function(item) {
    var type = item.dataset.type;
    var typeOk = _savedFilterType === 'all' || type === _savedFilterType;
    var textOk = !q || _savedNorm(item.textContent).includes(q);
    var show = typeOk && textOk;
    item.style.display = show ? '' : 'none';
    if (show) hasVisible = true;
  });
  // Remove a previous "no match" hint before deciding whether to add one.
  if (list) {
    var prev = list.querySelector('.sidebar-filter-empty');
    if (prev) prev.remove();
  }
  // Show/hide empty state
  var empty = document.getElementById('saved-searches-empty');
  if (empty) empty.style.display = hasVisible ? 'none' : '';
  // Explain an empty result caused by the global search rather than by an
  // actually empty saved-searches list.
  if (!hasVisible && q && list && items.length) {
    var hint = document.createElement('div');
    hint.className = 'sidebar-filter-empty';
    hint.textContent = t('sidebar.no_results');
    list.appendChild(hint);
  }
}