1|/* ObsiGate — UI: theme, sidebar, context menus, tabs, toast, find-in-page */
import { state } from './state.js';
import { openFile } from './viewer.js';
import { safeCreateIcons } from './utils.js';

// ---------------------------------------------------------------------------
// Right Sidebar Manager
// ---------------------------------------------------------------------------

export const RightSidebarManager = {
  init() {
    this.loadState();
    this.initToggle();
    this.initResize();
  },

  loadState() {
    const savedVisible = localStorage.getItem("obsigate-right-sidebar-visible");
    const savedWidth = localStorage.getItem("obsigate-right-sidebar-width");

    if (savedVisible !== null) {
      state.rightSidebarVisible = savedVisible === "true";
    }

    if (savedWidth) {
      state.rightSidebarWidth = parseInt(savedWidth) || 280;
    }

    this.applyState();
  },

  applyState() {
    const sidebar = document.getElementById("right-sidebar");
    const handle = document.getElementById("right-sidebar-resize-handle");
    const tocBtn = document.getElementById("toc-toggle-btn");
    const headerToggleBtn = document.getElementById("right-sidebar-toggle-btn");

    if (!sidebar) return;

    if (state.rightSidebarVisible) {
      sidebar.classList.remove("hidden");
      sidebar.style.width = `${state.rightSidebarWidth}px`;
      if (handle) handle.classList.remove("hidden");
      if (tocBtn) {
        tocBtn.classList.add("active");
        tocBtn.title = "Masquer le sommaire";
      }
      if (headerToggleBtn) {
        headerToggleBtn.title = "Masquer le panneau";
        headerToggleBtn.setAttribute("aria-label", "Masquer le panneau");
      }
    } else {
      sidebar.classList.add("hidden");
      if (handle) handle.classList.add("hidden");
      if (tocBtn) {
        tocBtn.classList.remove("active");
        tocBtn.title = "Afficher le sommaire";
      }
      if (headerToggleBtn) {
        headerToggleBtn.title = "Afficher le panneau";
        headerToggleBtn.setAttribute("aria-label", "Afficher le panneau");
      }
    }

    // Update icons
    safeCreateIcons();
  },

  toggle() {
    state.rightSidebarVisible = !state.rightSidebarVisible;
    localStorage.setItem("obsigate-right-sidebar-visible", state.rightSidebarVisible);
    this.applyState();
  },

  initToggle() {
    const toggleBtn = document.getElementById("right-sidebar-toggle-btn");
    if (toggleBtn) {
      toggleBtn.addEventListener("click", () => this.toggle());
    }
  },

  initResize() {
    const handle = document.getElementById("right-sidebar-resize-handle");
    const sidebar = document.getElementById("right-sidebar");

    if (!handle || !sidebar) return;

    let isResizing = false;
    let startX = 0;
    let startWidth = 0;

    const onMouseDown = (e) => {
      isResizing = true;
      startX = e.clientX;
      startWidth = sidebar.offsetWidth;
      handle.classList.add("active");
      document.body.style.cursor = "ew-resize";
      document.body.style.userSelect = "none";
    };

    const onMouseMove = (e) => {
      if (!isResizing) return;

      const delta = startX - e.clientX;
      let newWidth = startWidth + delta;

      // Constrain width
      newWidth = Math.max(200, Math.min(400, newWidth));

      sidebar.style.width = `${newWidth}px`;
      state.rightSidebarWidth = newWidth;
    };

    const onMouseUp = () => {
      if (!isResizing) return;

      isResizing = false;
      handle.classList.remove("active");
      document.body.style.cursor = "";
      document.body.style.userSelect = "";

      localStorage.setItem("obsigate-right-sidebar-width", state.rightSidebarWidth);
    };

    handle.addEventListener("mousedown", onMouseDown);
    document.addEventListener("mousemove", onMouseMove);
    document.addEventListener("mouseup", onMouseUp);
  },
};

// ---------------------------------------------------------------------------
// Theme
// ---------------------------------------------------------------------------
export function initTheme() {
  const saved = localStorage.getItem("obsigate-theme") || "dark";
  applyTheme(saved);
}

export function applyTheme(theme) {
  document.documentElement.setAttribute("data-theme", theme);
  localStorage.setItem("obsigate-theme", theme);

  // Update theme button icon and label
  const themeBtn = document.getElementById("theme-toggle");
  const themeLabel = document.getElementById("theme-label");
  if (themeBtn && themeLabel) {
    const icon = themeBtn.querySelector("i");
    if (icon) {
      icon.setAttribute("data-lucide", theme === "dark" ? "moon" : "sun");
    }
    themeLabel.textContent = theme === "dark" ? "Sombre" : "Clair";
    safeCreateIcons();
  }

  // Swap highlight.js theme
  const darkSheet = document.getElementById("hljs-theme-dark");
  const lightSheet = document.getElementById("hljs-theme-light");
  if (darkSheet && lightSheet) {
    darkSheet.disabled = theme !== "dark";
    lightSheet.disabled = theme !== "light";
  }
}

export function toggleTheme() {
  const current = document.documentElement.getAttribute("data-theme");
  applyTheme(current === "dark" ? "light" : "dark");
}

export function initHeaderMenu() {
  const menuBtn = document.getElementById("header-menu-btn");
  const menuDropdown = document.getElementById("header-menu-dropdown");

  if (!menuBtn || !menuDropdown) return;

  menuBtn.addEventListener("click", (e) => {
    e.stopPropagation();
    menuBtn.classList.toggle("active");
    menuDropdown.classList.toggle("active");
  });

  // Close menu when clicking outside
  document.addEventListener("click", (e) => {
    if (!menuDropdown.contains(e.target) && e.target !== menuBtn) {
      menuBtn.classList.remove("active");
      menuDropdown.classList.remove("active");
    }
  });

  // Prevent menu from closing when clicking inside
  menuDropdown.addEventListener("click", (e) => {
    e.stopPropagation();
  });
}

function closeHeaderMenu() {
  const menuBtn = document.getElementById("header-menu-btn");
  const menuDropdown = document.getElementById("header-menu-dropdown");
  if (!menuBtn || !menuDropdown) return;
  menuBtn.classList.remove("active");
  menuDropdown.classList.remove("active");
}

// ---------------------------------------------------------------------------
// Custom Dropdowns
// ---------------------------------------------------------------------------
export function initCustomDropdowns() {
  document.querySelectorAll(".custom-dropdown").forEach((dropdown) => {
    const trigger = dropdown.querySelector(".custom-dropdown-trigger");
    const options = dropdown.querySelectorAll(".custom-dropdown-option");
    const hiddenInput = dropdown.querySelector('input[type="hidden"]');
    const selectedText = dropdown.querySelector(".custom-dropdown-selected");
    const menu = dropdown.querySelector(".custom-dropdown-menu");

    if (!trigger) return;

    // Toggle dropdown
    trigger.addEventListener("click", (e) => {
      e.stopPropagation();
      const isOpen = dropdown.classList.contains("open");

      // Close all other dropdowns
      document.querySelectorAll(".custom-dropdown.open").forEach((d) => {
        if (d !== dropdown) d.classList.remove("open");
      });

      dropdown.classList.toggle("open", !isOpen);
      trigger.setAttribute("aria-expanded", !isOpen);

      // Position fixed menu for sidebar dropdowns
      if (!isOpen && dropdown.classList.contains("sidebar-dropdown") && menu) {
        const rect = trigger.getBoundingClientRect();
        menu.style.top = `${rect.bottom + 4}px`;
        menu.style.left = `${rect.left}px`;
        menu.style.width = `${rect.width}px`;
      }
    });

    // Handle option selection
    options.forEach((option) => {
      option.addEventListener("click", (e) => {
        e.stopPropagation();
        const value = option.getAttribute("data-value");
        const text = option.textContent;

        // Update hidden input
        if (hiddenInput) {
          hiddenInput.value = value;
          // Trigger change event
          hiddenInput.dispatchEvent(new Event("change", { bubbles: true }));
        }

        // Update selected text
        if (selectedText) {
          selectedText.textContent = text;
        }

        // Update visual selection
        options.forEach((opt) => opt.classList.remove("selected"));
        option.classList.add("selected");

        // Close dropdown
        dropdown.classList.remove("open");
        trigger.setAttribute("aria-expanded", "false");
      });
    });
  });

  // Close dropdowns when clicking outside
  document.addEventListener("click", () => {
    document.querySelectorAll(".custom-dropdown.open").forEach((dropdown) => {
      dropdown.classList.remove("open");
      const trigger = dropdown.querySelector(".custom-dropdown-trigger");
      if (trigger) trigger.setAttribute("aria-expanded", "false");
    });
  });
}

// Helper to populate custom dropdown options
function populateCustomDropdown(dropdownId, optionsList, defaultValue) {
  const dropdown = document.getElementById(dropdownId);
  if (!dropdown) return;

  const optionsContainer = dropdown.querySelector(".custom-dropdown-menu");
  const hiddenInput = dropdown.querySelector('input[type="hidden"]');
  const selectedText = dropdown.querySelector(".custom-dropdown-selected");

  if (!optionsContainer) return;

  // Clear existing options (keep the first one if it's the default)
  optionsContainer.innerHTML = "";

  // Add new options
  optionsList.forEach((opt) => {
    const li = document.createElement("li");
    li.className = "custom-dropdown-option";
    li.setAttribute("role", "option");
    li.setAttribute("data-value", opt.value);
    li.textContent = opt.text;
    if (opt.value === defaultValue) {
      li.classList.add("selected");
      if (selectedText) selectedText.textContent = opt.text;
      if (hiddenInput) hiddenInput.value = opt.value;
    }
    optionsContainer.appendChild(li);
  });

  // Re-initialize click handlers
  optionsContainer.querySelectorAll(".custom-dropdown-option").forEach((option) => {
    option.addEventListener("click", (e) => {
      e.stopPropagation();
      const value = option.getAttribute("data-value");
      const text = option.textContent;

      if (hiddenInput) {
        hiddenInput.value = value;
        hiddenInput.dispatchEvent(new Event("change", { bubbles: true }));
      }

      if (selectedText) {
        selectedText.textContent = text;
      }

      optionsContainer.querySelectorAll(".custom-dropdown-option").forEach((opt) => opt.classList.remove("selected"));
      option.classList.add("selected");

      dropdown.classList.remove("open");
      const trigger = dropdown.querySelector(".custom-dropdown-trigger");
      if (trigger) trigger.setAttribute("aria-expanded", "false");
    });
  });
}

// ---------------------------------------------------------------------------
// Toast notifications
// ---------------------------------------------------------------------------

/** Display a brief toast message at the bottom of the viewport. */
export function showToast(message, type) {
  console.log("showToast called with:", message, type);
  type = type || "info";
  let container = document.getElementById("toast-container");
  if (!container) {
    container = document.createElement("div");
    container.id = "toast-container";
    container.className = "toast-container";
    container.setAttribute("aria-live", "polite");
    document.body.appendChild(container);
  }
  var toast = document.createElement("div");
  toast.className = "toast toast-" + type;
  toast.textContent = message;
  container.appendChild(toast);
  // Trigger entrance animation
  requestAnimationFrame(function () {
    toast.classList.add("show");
  });
  setTimeout(function () {
    toast.classList.remove("show");
    toast.addEventListener("transitionend", function () {
      toast.remove();
    });
  }, 3500);
}

// ---------------------------------------------------------------------------
// Sidebar toggle (desktop)
// ---------------------------------------------------------------------------
export function initSidebarToggle() {
  const toggleBtn = document.getElementById("sidebar-toggle-btn");
  const sidebar = document.getElementById("sidebar");
  const resizeHandle = document.getElementById("sidebar-resize-handle");

  if (!toggleBtn || !sidebar || !resizeHandle) return;

  // Restore saved state
  const savedState = localStorage.getItem("obsigate-sidebar-hidden");
  if (savedState === "true") {
    sidebar.classList.add("hidden");
    resizeHandle.classList.add("hidden");
    toggleBtn.classList.add("active");
  }

  toggleBtn.addEventListener("click", () => {
    const isHidden = sidebar.classList.toggle("hidden");
    resizeHandle.classList.toggle("hidden", isHidden);
    toggleBtn.classList.toggle("active", isHidden);
    localStorage.setItem("obsigate-sidebar-hidden", isHidden ? "true" : "false");
  });
}

// ---------------------------------------------------------------------------
// Mobile sidebar
// ---------------------------------------------------------------------------
export function initMobile() {
  const hamburger = document.getElementById("hamburger-btn");
  const overlay = document.getElementById("sidebar-overlay");
  const sidebar = document.getElementById("sidebar");

  hamburger.addEventListener("click", () => {
    sidebar.classList.toggle("mobile-open");
    overlay.classList.toggle("active");
  });

  overlay.addEventListener("click", () => {
    sidebar.classList.remove("mobile-open");
    overlay.classList.remove("active");
  });
}

function closeMobileSidebar() {
  const sidebar = document.getElementById("sidebar");
  const overlay = document.getElementById("sidebar-overlay");
  if (sidebar) sidebar.classList.remove("mobile-open");
  if (overlay) overlay.classList.remove("active");
}

// ---------------------------------------------------------------------------
// Resizable sidebar (horizontal)
// ---------------------------------------------------------------------------
export function initSidebarResize() {
  const handle = document.getElementById("sidebar-resize-handle");
  const sidebar = document.getElementById("sidebar");
  if (!handle || !sidebar) return;

  // Restore saved width
  const savedWidth = localStorage.getItem("obsigate-sidebar-width");
  if (savedWidth) {
    sidebar.style.width = savedWidth + "px";
  }

  let startX = 0;
  let startWidth = 0;

  function onMouseMove(e) {
    const newWidth = Math.min(500, Math.max(200, startWidth + (e.clientX - startX)));
    sidebar.style.width = newWidth + "px";
  }

  function onMouseUp() {
    document.body.classList.remove("resizing");
    handle.classList.remove("active");
    document.removeEventListener("mousemove", onMouseMove);
    document.removeEventListener("mouseup", onMouseUp);
    localStorage.setItem("obsigate-sidebar-width", parseInt(sidebar.style.width));
  }

  handle.addEventListener("mousedown", (e) => {
    e.preventDefault();
    startX = e.clientX;
    startWidth = sidebar.getBoundingClientRect().width;
    document.body.classList.add("resizing");
    handle.classList.add("active");
    document.addEventListener("mousemove", onMouseMove);
    document.addEventListener("mouseup", onMouseUp);
  });
}

// ---------------------------------------------------------------------------
// Resizable tag section (vertical)
// ---------------------------------------------------------------------------
export function initTagResize() {
  const handle = document.getElementById("tag-resize-handle");
  const tagSection = document.getElementById("tag-cloud-section");
  if (!handle || !tagSection) return;

  // Restore saved height
  const savedHeight = localStorage.getItem("obsigate-tag-height");
  if (savedHeight) {
    tagSection.style.height = savedHeight + "px";
  }

  let startY = 0;
  let startHeight = 0;

  function onMouseMove(e) {
    // Dragging up increases height, dragging down decreases
    const newHeight = Math.min(400, Math.max(60, startHeight - (e.clientY - startY)));
    tagSection.style.height = newHeight + "px";
  }

  function onMouseUp() {
    document.body.classList.remove("resizing-v");
    handle.classList.remove("active");
    document.removeEventListener("mousemove", onMouseMove);
    document.removeEventListener("mouseup", onMouseUp);
    localStorage.setItem("obsigate-tag-height", parseInt(tagSection.style.height));
  }

  handle.addEventListener("mousedown", (e) => {
    e.preventDefault();
    startY = e.clientY;
   4

... [OUTPUT TRUNCATED - 30698 chars omitted out of 80698 total] ...

<div class="modal-warning">
          <i data-lucide="alert-triangle" class="icon"></i>
          <div>
            <strong>Attention !</strong> Cette action est irréversible.
          </div>
        </div>
        <div class="modal-form-group">
          <label class="modal-label">Fichier à supprimer:</label>
          <div style="font-family: 'JetBrains Mono', monospace; color: var(--text-muted);">${path}</div>
        </div>
      </div>
      <div class="obsigate-modal-footer">
        <button class="modal-btn" id="del-cancel-btn">Annuler</button>
        <button class="modal-btn danger" id="del-confirm-btn">Supprimer définitivement</button>
      </div>
    `;
    
    overlay.appendChild(modal);
    document.body.appendChild(overlay);
    
    setTimeout(() => overlay.classList.add('active'), 10);
    safeCreateIcons();
    
    const confirmBtn = modal.querySelector('#del-confirm-btn');
    const cancelBtn = modal.querySelector('#del-cancel-btn');
    
    const deleteFile = async () => {
      confirmBtn.disabled = true;
      confirmBtn.textContent = 'Suppression...';
      
      try {
        await api(`/api/file/${encodeURIComponent(vault)}?path=${encodeURIComponent(path)}`, {
          method: 'DELETE',
        });
        
        showToast('Fichier supprimé', 'success');
        this._closeModal(overlay);
        await refreshSidebarTreePreservingState();
        
        if (state.currentVault === vault && state.currentPath === path) {
          showWelcome();
        }
      } catch (err) {
        showToast(err.message || 'Erreur lors de la suppression', 'error');
        confirmBtn.disabled = false;
        confirmBtn.textContent = 'Supprimer définitivement';
      }
    };
    
    confirmBtn.addEventListener('click', deleteFile);
    cancelBtn.addEventListener('click', () => this._closeModal(overlay));
  },

  _createModalOverlay() {
    const overlay = document.createElement('div');
    overlay.className = 'obsigate-modal-overlay';
    overlay.addEventListener('click', (e) => {
      if (e.target === overlay) {
        this._closeModal(overlay);
      }
    });
    return overlay;
  },

  _closeModal(overlay) {
    overlay.classList.remove('active');
    setTimeout(() => overlay.remove(), 200);
  }
};

// ---------------------------------------------------------------------------
// Find in Page Manager
// ---------------------------------------------------------------------------
export const FindInPageManager = {
  isOpen: false,
  searchTerm: "",
  matches: [],
  currentIndex: -1,
  options: {
    caseSensitive: false,
    wholeWord: false,
    useRegex: false,
  },
  debounceTimer: null,
  previousFocus: null,

  init() {
    const bar = document.getElementById("find-in-page-bar");
    const input = document.getElementById("find-input");
    const prevBtn = document.getElementById("find-prev");
    const nextBtn = document.getElementById("find-next");
    const closeBtn = document.getElementById("find-close");
    const caseSensitiveBtn = document.getElementById("find-case-sensitive");
    const wholeWordBtn = document.getElementById("find-whole-word");
    const regexBtn = document.getElementById("find-regex");

    if (!bar || !input) return;

    // Keyboard shortcuts
    document.addEventListener("keydown", (e) => {
      // Ctrl+F or Cmd+F to open
      if ((e.ctrlKey || e.metaKey) && e.key === "f") {
        e.preventDefault();
        this.open();
      }
      // Escape to close
      if (e.key === "Escape" && this.isOpen) {
        e.preventDefault();
        this.close();
      }
      // Enter to go to next
      if (e.key === "Enter" && this.isOpen && document.activeElement === input) {
        e.preventDefault();
        if (e.shiftKey) {
          this.goToPrevious();
        } else {
          this.goToNext();
        }
      }
      // F3 for next/previous
      if (e.key === "F3" && this.isOpen) {
        e.preventDefault();
        if (e.shiftKey) {
          this.goToPrevious();
        } else {
          this.goToNext();
        }
      }
    });

    // Input event with debounce
    input.addEventListener("input", (e) => {
      clearTimeout(this.debounceTimer);
      this.debounceTimer = setTimeout(() => {
        this.search(e.target.value);
      }, 250);
    });

    // Navigation buttons
    prevBtn.addEventListener("click", () => this.goToPrevious());
    nextBtn.addEventListener("click", () => this.goToNext());

    // Close button
    closeBtn.addEventListener("click", () => this.close());

    // Option toggles
    caseSensitiveBtn.addEventListener("click", () => {
      this.options.caseSensitive = !this.options.caseSensitive;
      caseSensitiveBtn.setAttribute("aria-pressed", this.options.caseSensitive);
      this.saveState();
      if (this.searchTerm) this.search(this.searchTerm);
    });

    wholeWordBtn.addEventListener("click", () => {
      this.options.wholeWord = !this.options.wholeWord;
      wholeWordBtn.setAttribute("aria-pressed", this.options.wholeWord);
      this.saveState();
      if (this.searchTerm) this.search(this.searchTerm);
    });

    regexBtn.addEventListener("click", () => {
      this.options.useRegex = !this.options.useRegex;
      regexBtn.setAttribute("aria-pressed", this.options.useRegex);
      this.saveState();
      if (this.searchTerm) this.search(this.searchTerm);
    });

    // Load saved state
    this.loadState();
  },

  open() {
    const bar = document.getElementById("find-in-page-bar");
    const input = document.getElementById("find-input");
    if (!bar || !input) return;

    this.previousFocus = document.activeElement;
    this.isOpen = true;
    bar.hidden = false;
    input.focus();
    input.select();
    safeCreateIcons();
  },

  close() {
    const bar = document.getElementById("find-in-page-bar");
    if (!bar) return;

    this.isOpen = false;
    bar.hidden = true;
    this.clearHighlights();
    this.matches = [];
    this.currentIndex = -1;
    this.searchTerm = "";

    // Restore previous focus
    if (this.previousFocus && this.previousFocus.focus) {
      this.previousFocus.focus();
    }
  },

  search(term) {
    this.searchTerm = term;
    this.clearHighlights();
    this.hideError();

    if (!term || term.trim().length === 0) {
      this.updateCounter();
      this.updateNavButtons();
      return;
    }

    const contentArea = document.querySelector(".md-content");
    if (!contentArea) {
      this.updateCounter();
      this.updateNavButtons();
      return;
    }

    try {
      const regex = this.createRegex(term);
      this.matches = [];
      this.findMatches(contentArea, regex);
      this.currentIndex = this.matches.length > 0 ? 0 : -1;
      this.highlightMatches();
      this.updateCounter();
      this.updateNavButtons();

      if (this.matches.length > 0) {
        this.scrollToMatch(0);
      }
    } catch (err) {
      this.showError(err.message);
      this.matches = [];
      this.currentIndex = -1;
      this.updateCounter();
      this.updateNavButtons();
    }
  },

  createRegex(term) {
    let pattern = term;

    if (!this.options.useRegex) {
      // Escape special regex characters
      pattern = term.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
    }

    if (this.options.wholeWord) {
      pattern = "\\b" + pattern + "\\b";
    }

    const flags = this.options.caseSensitive ? "g" : "gi";
    return new RegExp(pattern, flags);
  },

  findMatches(container, regex) {
    const walker = document.createTreeWalker(container, NodeFilter.SHOW_TEXT, {
      acceptNode: (node) => {
        // Skip code blocks, scripts, styles
        const parent = node.parentElement;
        if (!parent) return NodeFilter.FILTER_REJECT;
        const tagName = parent.tagName.toLowerCase();
        if (["code", "pre", "script", "style"].includes(tagName)) {
          return NodeFilter.FILTER_REJECT;
        }
        // Skip empty text nodes
        if (!node.textContent || node.textContent.trim().length === 0) {
          return NodeFilter.FILTER_REJECT;
        }
        return NodeFilter.FILTER_ACCEPT;
      },
    });

    let node;
    while ((node = walker.nextNode())) {
      const text = node.textContent;
      let match;
      regex.lastIndex = 0; // Reset regex

      while ((match = regex.exec(text)) !== null) {
        this.matches.push({
          node: node,
          index: match.index,
          length: match[0].length,
          text: match[0],
        });

        // Prevent infinite loop with zero-width matches
        if (match.index === regex.lastIndex) {
          regex.lastIndex++;
        }
      }
    }
  },

  highlightMatches() {
    const matchesByNode = new Map();

    this.matches.forEach((match, idx) => {
      if (!matchesByNode.has(match.node)) {
        matchesByNode.set(match.node, []);
      }
      matchesByNode.get(match.node).push({ match, idx });
    });

    matchesByNode.forEach((entries, node) => {
      if (!node || !node.parentNode) return;

      const text = node.textContent || "";
      let cursor = 0;
      const fragment = document.createDocumentFragment();

      entries.sort((a, b) => a.match.index - b.match.index);

      entries.forEach(({ match, idx }) => {
        if (match.index > cursor) {
          fragment.appendChild(document.createTextNode(text.substring(cursor, match.index)));
        }

        const matchText = text.substring(match.index, match.index + match.length);
        const mark = document.createElement("mark");
        mark.className = idx === this.currentIndex ? "find-highlight find-highlight-active" : "find-highlight";
        mark.textContent = matchText;
        mark.setAttribute("data-find-index", idx);
        fragment.appendChild(mark);

        match.element = mark;
        cursor = match.index + match.length;
      });

      if (cursor < text.length) {
        fragment.appendChild(document.createTextNode(text.substring(cursor)));
      }

      node.parentNode.replaceChild(fragment, node);
    });
  },

  clearHighlights() {
    const contentArea = document.querySelector(".md-content");
    if (!contentArea) return;

    const marks = contentArea.querySelectorAll("mark.find-highlight");
    marks.forEach((mark) => {
      if (!mark.parentNode) return;
      const text = mark.textContent;
      const textNode = document.createTextNode(text);
      mark.parentNode.replaceChild(textNode, mark);
    });

    // Normalize text nodes to merge adjacent text nodes
    contentArea.normalize();
  },

  goToNext() {
    if (this.matches.length === 0) return;

    // Remove active class from current
    if (this.currentIndex >= 0 && this.matches[this.currentIndex].element) {
      this.matches[this.currentIndex].element.classList.remove("find-highlight-active");
    }

    // Move to next (with wrapping)
    this.currentIndex = (this.currentIndex + 1) % this.matches.length;

    // Add active class to new current
    if (this.matches[this.currentIndex].element) {
      this.matches[this.currentIndex].element.classList.add("find-highlight-active");
    }

    this.scrollToMatch(this.currentIndex);
    this.updateCounter();
  },

  goToPrevious() {
    if (this.matches.length === 0) return;

    // Remove active class from current
    if (this.currentIndex >= 0 && this.matches[this.currentIndex].element) {
      this.matches[this.currentIndex].element.classList.remove("find-highlight-active");
    }

    // Move to previous (with wrapping)
    this.currentIndex = this.currentIndex <= 0 ? this.matches.length - 1 : this.currentIndex - 1;

    // Add active class to new current
    if (this.matches[this.currentIndex].element) {
      this.matches[this.currentIndex].element.classList.add("find-highlight-active");
    }

    this.scrollToMatch(this.currentIndex);
    this.updateCounter();
  },

  scrollToMatch(index) {
    if (index < 0 || index >= this.matches.length) return;

    const match = this.matches[index];
    if (!match.element) return;

    const contentArea = document.getElementById("content-area");
    if (!contentArea) {
      match.element.scrollIntoView({ behavior: "smooth", block: "center" });
      return;
    }

    // Calculate position with offset for header
    const elementTop = match.element.offsetTop;
    const offset = 100; // Offset for header

    contentArea.scrollTo({
      top: elementTop - offset,
      behavior: "smooth",
    });
  },

  updateCounter() {
    const counter = document.getElementById("find-counter");
    if (!counter) return;

    const count = this.matches.length;
    if (count === 0) {
      counter.textContent = "0 occurrence";
    } else if (count === 1) {
      counter.textContent = "1 occurrence";
    } else {
      counter.textContent = `${count} occurrences`;
    }
  },

  updateNavButtons() {
    const prevBtn = document.getElementById("find-prev");
    const nextBtn = document.getElementById("find-next");
    if (!prevBtn || !nextBtn) return;

    const hasMatches = this.matches.length > 0;
    prevBtn.disabled = !hasMatches;
    nextBtn.disabled = !hasMatches;
  },

  showError(message) {
    const errorEl = document.getElementById("find-error");
    if (!errorEl) return;

    errorEl.textContent = message;
    errorEl.hidden = false;
  },

  hideError() {
    const errorEl = document.getElementById("find-error");
    if (!errorEl) return;

    errorEl.hidden = true;
  },

  saveState() {
    try {
      const state = {
        options: this.options,
      };
      localStorage.setItem("obsigate-find-in-page-state", JSON.stringify(state));
    } catch (e) {
      // Ignore localStorage errors
    }
  },

  loadState() {
    try {
      const saved = localStorage.getItem("obsigate-find-in-page-state");
      if (saved) {
        const state = JSON.parse(saved);
        if (state.options) {
          this.options = { ...this.options, ...state.options };

          // Update button states
          const caseSensitiveBtn = document.getElementById("find-case-sensitive");
          const wholeWordBtn = document.getElementById("find-whole-word");
          const regexBtn = document.getElementById("find-regex");

          if (caseSensitiveBtn) caseSensitiveBtn.setAttribute("aria-pressed", this.options.caseSensitive);
          if (wholeWordBtn) wholeWordBtn.setAttribute("aria-pressed", this.options.wholeWord);
          if (regexBtn) regexBtn.setAttribute("aria-pressed", this.options.useRegex);
        }
      }
    } catch (e) {
      // Ignore localStorage errors
    }
  },
};

// ---------------------------------------------------------------------------
// Tab Manager
// ---------------------------------------------------------------------------
export const TabManager = {
  _tabs: [],
  _activeTabId: null,
  _previewTabId: null,  // single-click preview tab (temporary, replaced on next preview)
  _tabCache: {},  // { tabId: { vault, path, title, data, rawSource, sourceView, scrollTop, icon } }
  _tabBar: null,
  _tabList: null,
  _dirtyTabs: new Set(),

  init() {
    this._tabBar = document.getElementById("tab-bar");
    this._tabList = document.getElementById("tab-list");
  },

  /** Open a file as a preview tab (single-click).
   *  Replaces any existing preview tab. If the file is already
   *  open as a persistent tab, just activates it. */
  async openPreview(vault, path) {
    const tabId = `${vault}::${path}`;

    // If already open as persistent tab, just activate it
    const existing = this._tabs.find(t => t.id === tabId && !t.preview);
    if (existing) {
      this.activate(tabId);
      return;
    }

    // Close existing preview tab
    if (this._previewTabId && this._previewTabId !== tabId) {
      this.close(this._previewTabId);
    }

    // If already open as preview, just focus it
    const previewExisting = this._tabs.find(t => t.id === tabId && t.preview);
    if (previewExisting) {
      this.activate(tabId);
      return;
    }

    // Create preview tab
    const name = path.split("/").pop().replace(/\.md$/i, "");
    const icon = getFileIcon(name + ".md");

    this._tabs.push({ id: tabId, vault, path, name, icon, preview: true });
    this._tabCache[tabId] = { vault, path, title: name, data: null, rawSource: null, sourceView: false, scrollTop: 0, icon };
    this._previewTabId = tabId;

    this._renderTabs();
    this.activate(tabId);
  },

  /** Convert a preview tab to a persistent tab (double-click).
   *  If already persistent, opens a new duplicate (same file, different tab). */
  async openPersistent(vault, path) {
    const tabId = `${vault}::${path}`;

    // If it's already a preview tab, convert it to persistent
    const previewTab = this._tabs.find(t => t.id === tabId && t.preview);
    if (previewTab) {
      previewTab.preview = false;
      if (this._previewTabId === tabId) {
        this._previewTabId = null;
      }
      this._renderTabs();
      this.activate(tabId);
      return;
    }

    // If already persistent, just focus it
    const existing = this._tabs.find(t => t.id === tabId && !t.preview);
    if (existing) {
      this.activate(tabId);
      return;
    }

    // Create a new persistent tab
    this.open(vault, path);
  },

  /** Open a file in a tab (or focus existing) */
  async open(vault, path, options = {}) {
    const tabId = `${vault}::${path}`;
    
    // If already open, just focus it
    const existing = this._tabs.find(t => t.id === tabId);
    if (existing) {
      // Convert preview to persistent if needed
      if (existing.preview) {
        existing.preview = false;
        if (this._previewTabId === tabId) this._previewTabId = null;
        this._renderTabs();
      }
      this.activate(tabId);
      return;
    }

    // Create new tab
    const name = path.split("/").pop().replace(/\.md$/i, "");
    const icon = getFileIcon(name + ".md");
    
    this._tabs.push({ id: tabId, vault, path, name, icon });
    this._tabCache[tabId] = { vault, path, title: name, data: null, rawSource: null, sourceView: false, scrollTop: 0, icon };
    
    this._renderTabs();
    this.activate(tabId);
  },

  /** Activate a specific tab */
  async activate(tabId) {
    if (this._activeTabId === tabId && this._tabs.length > 0) return;
    
    // Save current tab state
    if (this._activeTabId && this._tabCache[this._activeTabId]) {
      this._saveCurrentTabState();
    }

    this._activeTabId = tabId;
    this._renderTabs();
    
    // Load tab content
    const cache = this._tabCache[tabId];
    if (!cache) return;

    // Update global state
    state.currentVault = cache.vault;
    state.currentPath = cache.path;
    syncActiveFileTreeItem(cache.vault, cache.path);

    const area = document.getElementById("content-area");
    
    if (cache.data) {
      // Use cached data
      this._restoreTabContent(cache, area);
    } else {
      // Fetch file content
      area.innerHTML = '<div style="padding:40px;text-align:center;color:var(--text-muted)">Chargement...</div>';
      try {
        const data = await api(`/api/file/${encodeURIComponent(cache.vault)}?path=${encodeURIComponent(cache.path)}`);
        cache.data = data;
        cache.title = data.title;
        renderFile(cache.data);
        
        // Restore source view if needed
        if (cache.sourceView) {
          await this._toggleSourceView(cache, area);
        }
        if (cache.scrollTop) {
          area.scrollTop = cache.scrollTop;
        }
      } catch (err) {
        area.innerHTML = `<div style="padding:40px;text-align:center;color:var(--text-error)">Erreur: ${escapeHtml(err.message)}</div>`;
      }
    }
    
    // Update URL hash
    if (history.pushState) {
      history.pushState(null, "", `#/file/${encodeURIComponent(cache.vault)}/${encodeURIComponent(cache.path)}`);
    }
    
    // Hide dashboard
    const dashboard = document.getElementById("dashboard-home");
    if (dashboard) dashboard.style.display = "none";
  },

  /** Close a tab */
  close(tabId) {
    const idx = this._tabs.findIndex(t => t.id === tabId);
    if (idx === -1) return;

    this._tabs.splice(idx, 1);
    delete this._tabCache[tabId];
    this._dirtyTabs.delete(tabId);

    if (this._tabs.length === 0) {
      this._activeTabId = null;
      this._showDashboard();
      this._tabBar.hidden = true;
    } else if (this._activeTabId === tabId) {
      // Activate adjacent tab
      const newIdx = Math.min(idx, this._tabs.length - 1);
      this.activate(this._tabs[newIdx].id);
    }

    this._renderTabs();
  },

  /** Close all tabs */
  closeAll() {
    this._tabs = [];
    this._tabCache = {};
    this._dirtyTabs.clear();
    this._activeTabId = null;
    this._showDashboard();
    this._tabBar.hidden = true;
  },

  /** Close tabs to the right */
  closeRight(tabId) {
    const idx = this._tabs.findIndex(t => t.id === tabId);
    if (idx === -1) return;
    const toClose = this._tabs.slice(idx + 1);
    for (const tab of toClose) {
      delete this._tabCache[tab.id];
      this._dirtyTabs.delete(tab.id);
    }
    this._tabs = this._tabs.slice(0, idx + 1);
    if (!this._tabs.find(t => t.id === this._activeTabId)) {
      this.activate(tabId);
    }
    this._renderTabs();
  },

  /** Close other tabs */
  closeOthers(tabId) {
    const tab = this._tabs.find(t => t.id === tabId);
    if (!tab) return;
    for (const t of this._tabs) {
      if (t.id !== tabId) {
        delete this._tabCache[t.id];
        this._dirtyTabs.delete(t.id);
      }
    }
    this._tabs = [tab];
    this.activate(tabId);
    this._renderTabs();
  },

  /** Reorder tabs by drag and drop */
  moveTab(fromIdx, toIdx) {
    if (fromIdx === toIdx || fromIdx < 0 || toIdx < 0) return;
    const tab = this._tabs.splice(fromIdx, 1)[0];
    this._tabs.splice(toIdx, 0, tab);
    this._renderTabs();
  },

  /** Save current tab state before switching */
  _saveCurrentTabState() {
    const cache = this._tabCache[this._activeTabId];
    if (!cache) return;
    
    const area = document.getElementById("content-area");
    const rendered = document.getElementById("file-rendered-content");
    
    cache.scrollTop = area.scrollTop;
    cache.sourceView = rendered ? rendered.style.display === "none" : false;
  },

  /** Restore tab content from cache */
  _restoreTabContent(cache, area) {
    renderFile(cache.data);
    if (cache.sourceView) {
      this._restoreSourceView(cache, area);
    }
    if (cache.scrollTop) {
      area.scrollTop = cache.scrollTop;
    }
  },

  async _toggleSourceView(cache, area) {
    const rendered = document.getElementById("file-rendered-content");
    const raw = document.getElementById("file-raw-content");
    if (!rendered || !raw) return;
    
    if (!cache.rawSource) {
      const rawData = await api(`/api/file/${encodeURIComponent(cache.vault)}/raw?path=${encodeURIComponent(cache.path)}`);
      cache.rawSource = rawData.raw;
    }
    raw.textContent = cache.rawSource;
    rendered.style.display = "none";
    raw.style.display = "block";
  },

  _restoreSourceView(cache, area) {
    requestAnimationFrame(() => {
      const rendered = document.getElementById("file-rendered-content");
      const raw = document.getElementById("file-raw-content");
      if (rendered && raw && cache.rawSource) {
        raw.textContent = cache.rawSource;
        rendered.style.display = "none";
        raw.style.display = "block";
      }
    });
  },

  _showDashboard() {
    const area = document.getElementById("content-area");
    // Save dashboard DOM before clearing (it may have been removed from DOM by renderFile)
    let dashboard = document.getElementById("dashboard-home");
    if (!dashboard) {
      // Dashboard was destroyed — rebuild via showWelcome
      area.innerHTML = "";
      showWelcome();
      return;
    }
    area.innerHTML = "";
    dashboard.style.display = "";
    area.appendChild(dashboard);
    // Refresh widgets after restoring
    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 (history.pushState) {
      history.pushState(null, "", "#");
    }
  },

  /** Render the tab bar */