/* ObsiGate — Search module */
import { api } from './auth.js';
import { state } from './state.js';
import { safeCreateIcons } from './utils.js';
import { showLoading, el, hideProgressBar, showWelcome, highlightSearchText } from './viewer.js';
import { _getEffective } from './config.js';
import { TabManager, showToast } from './ui.js';
import { addTagFilter, buildSearchResultsHeader, shouldDisplayPath, removeTagFilter, TagFilterService } from './sidebar.js';
// ---------------------------------------------------------------------------
// Search History Service (localStorage, LIFO, max 50, dedup)
// ---------------------------------------------------------------------------
export const SearchHistory = {
  _load() {
    try {
      const raw = localStorage.getItem(state.SEARCH_HISTORY_KEY);
      return raw ? JSON.parse(raw) : [];
    } catch {
      return [];
    }
  },
  _save(entries) {
    try {
      localStorage.setItem(state.SEARCH_HISTORY_KEY, JSON.stringify(entries));
    } catch {}
  },
  getAll() {
    return this._load();
  },
  add(query) {
    if (!query || !query.trim()) return;
    const q = query.trim();
    let entries = this._load().filter((e) => e !== q);
    entries.unshift(q);
    if (entries.length > state.MAX_HISTORY_ENTRIES) entries = entries.slice(0, state.MAX_HISTORY_ENTRIES);
    this._save(entries);
  },
  remove(query) {
    const entries = this._load().filter((e) => e !== query);
    this._save(entries);
  },
  clear() {
    this._save([]);
  },
  filter(prefix) {
    if (!prefix) return this.getAll().slice(0, 8);
    const lp = prefix.toLowerCase();
    return this._load()
      .filter((e) => e.toLowerCase().includes(lp))
      .slice(0, 8);
  },
};


// ---------------------------------------------------------------------------
// Query Parser — extracts operators (tag:, #, vault:, title:, path:, ext:)
// ---------------------------------------------------------------------------
export const QueryParser = {
  parse(raw) {
    const result = { tags: [], vault: null, title: null, path: null, ext: null, freeText: "" };
    if (!raw) return result;
    const tokens = this._tokenize(raw);
    const freeTokens = [];
    for (const tok of tokens) {
      const lower = tok.toLowerCase();
      if (lower.startsWith("tag:")) {
        const v = tok.slice(4).replace(/"/g, "").trim().replace(/^#/, "");
        if (v) result.tags.push(v);
      } else if (lower.startsWith("#") && tok.length > 1) {
        result.tags.push(tok.slice(1));
      } else if (lower.startsWith("vault:")) {
        result.vault = tok.slice(6).replace(/"/g, "").trim();
      } else if (lower.startsWith("title:")) {
        result.title = tok.slice(6).replace(/"/g, "").trim();
      } else if (lower.startsWith("path:")) {
        result.path = tok.slice(5).replace(/"/g, "").trim();
      } else if (lower.startsWith("ext:")) {
        result.ext = tok.slice(4).replace(/"/g, "").trim().replace(/^\./, "").toLowerCase();
      } else {
        freeTokens.push(tok);
      }
    }
    result.freeText = freeTokens.join(" ");
    return result;
  },
  _tokenize(raw) {
    const tokens = [];
    let i = 0;
    const n = raw.length;
    while (i < n) {
      while (i < n && raw[i] === " ") i++;
      if (i >= n) break;
      if (raw[i] !== '"') {
        let j = i;
        while (j < n && raw[j] !== " ") {
          if (raw[j] === '"') {
            j++;
            while (j < n && raw[j] !== '"') j++;
            if (j < n) j++;
          } else j++;
        }
        tokens.push(raw.slice(i, j).replace(/"/g, ""));
        i = j;
      } else {
        i++;
        let j = i;
        while (j < n && raw[j] !== '"') j++;
        tokens.push(raw.slice(i, j));
        i = j + 1;
      }
    }
    return tokens;
  },
  /** Detect the current operator context at cursor for autocomplete */
  getContext(raw, cursorPos) {
    const before = raw.slice(0, cursorPos);
    // Check if we're typing a tag: or # value
    const tagMatch = before.match(/(?:tag:|#)([\w-]*)$/i);
    if (tagMatch) return { type: "tag", prefix: tagMatch[1] };
    // Check if typing title:
    const titleMatch = before.match(/title:([\w-]*)$/i);
    if (titleMatch) return { type: "title", prefix: titleMatch[1] };
    // Default: free text
    const words = before.trim().split(/\s+/);
    const lastWord = words[words.length - 1] || "";
    return { type: "text", prefix: lastWord };
  },
};


// ---------------------------------------------------------------------------
// Autocomplete Dropdown Controller
// ---------------------------------------------------------------------------
export const AutocompleteDropdown = {
  _dropdown: null,
  _historySection: null,
  _titlesSection: null,
  _tagsSection: null,
  _historyList: null,
  _titlesList: null,
  _tagsList: null,
  _emptyEl: null,
  _suggestTimer: null,

  init() {
    this._dropdown = document.getElementById("search-dropdown");
    this._historySection = document.getElementById("search-dropdown-history");
    this._titlesSection = document.getElementById("search-dropdown-titles");
    this._tagsSection = document.getElementById("search-dropdown-tags");
    this._historyList = document.getElementById("search-dropdown-history-list");
    this._titlesList = document.getElementById("search-dropdown-titles-list");
    this._tagsList = document.getElementById("search-dropdown-tags-list");
    this._emptyEl = document.getElementById("search-dropdown-empty");

    // Clear history button
    const clearBtn = document.getElementById("search-dropdown-clear-history");
    if (clearBtn) {
      clearBtn.addEventListener("click", (e) => {
        e.stopPropagation();
        SearchHistory.clear();
        this.hide();
      });
    }

    // Close dropdown on outside click
    document.addEventListener("click", (e) => {
      if (this._dropdown && !this._dropdown.contains(e.target) && e.target.id !== "search-input") {
        this.hide();
      }
    });
  },

  show() {
    if (this._dropdown) this._dropdown.hidden = false;
  },

  hide() {
    if (this._dropdown) this._dropdown.hidden = true;
    state.dropdownActiveIndex = -1;
    state.dropdownItems = [];
  },

  isVisible() {
    return this._dropdown && !this._dropdown.hidden;
  },

  /** Populate and show the dropdown with history, title suggestions, and tag suggestions */
  async populate(inputValue, cursorPos) {
    if (this._suppressNext) { this._suppressNext = false; return; }
    // Cancel previous suggestion request
    if (state.suggestAbortController) {
      state.suggestAbortController.abort();
      state.suggestAbortController = null;
    }

    const ctx = QueryParser.getContext(inputValue, cursorPos);
    const vault = document.getElementById("vault-filter").value;

    // History — always show filtered history
    const historyItems = SearchHistory.filter(inputValue).slice(0, 5);
    this._renderHistory(historyItems, inputValue);

    // Title and tag suggestions from API (debounced) — always fetch both
    clearTimeout(this._suggestTimer);
    const prefix = ctx.prefix;
    if (prefix && prefix.length >= 2) {
      // Only show placeholder if lists are empty (avoid flashing on fast typing)
      const hasTitles = this._titlesList.children.length > 0 && !this._titlesList.querySelector(".search-dropdown__item--loading");
      const hasTags = this._tagsList.children.length > 0 && !this._tagsList.querySelector(".search-dropdown__item--loading");
      if (!hasTitles) {
        this._titlesList.innerHTML = '<li class="search-dropdown__item search-dropdown__item--loading">Recherche...</li>';
      }
      if (!hasTags) {
        this._tagsList.innerHTML = '<li class="search-dropdown__item search-dropdown__item--loading">Recherche...</li>';
      }
      this._titlesSection.hidden = false;
      this._tagsSection.hidden = false;
      this.show();
      this._suggestTimer = setTimeout(() => this._fetchSuggestions(prefix, vault), 150);
    } else {
      this._renderTitles([], "");
      this._renderTags([], "");
      this._titlesSection.hidden = true;
      this._tagsSection.hidden = true;
    }

    // Show/hide sections
    this._historySection.hidden = historyItems.length === 0;
    const hasContent = historyItems.length > 0;
    if (hasContent || (prefix && prefix.length >= 2)) {
      this.show();
    } else {
      this.hide();
    }

    this._collectItems();
  },

  async _fetchSuggestions(prefix, vault) {
    state.suggestAbortController = new AbortController();
    // Fetch titles
    try {
      const titlesRes = await api(`/api/suggest?q=${encodeURIComponent(prefix)}&vault=${encodeURIComponent(vault)}&limit=5`, { signal: state.suggestAbortController.signal });
      this._renderTitles(titlesRes.suggestions || [], prefix);
      this._titlesSection.hidden = !(titlesRes.suggestions || []).length;
      if (titlesRes.suggestions?.length) this.show();
    } catch (err) {
      if (err.name === "AbortError") return;
      this._titlesSection.hidden = true;
    }
    // Fetch tags — keep section always visible to confirm it works
    try {
      const tagsRes = await api(`/api/tags/suggest?q=${encodeURIComponent(prefix)}&vault=${encodeURIComponent(vault)}&limit=5`, { signal: state.suggestAbortController.signal });
      const items = tagsRes.suggestions || [];
      if (items.length > 0) {
        this._renderTags(items, prefix);
      } else {
        this._tagsList.innerHTML = '<li class="search-dropdown__item" style="color:var(--text-muted);font-style:italic;padding:8px 12px">Aucun tag</li>';
      }
      this._tagsSection.hidden = false;
      this.show();
    } catch (err) {
      if (err.name === "AbortError") return;
      this._tagsList.innerHTML = '<li class="search-dropdown__item" style="color:var(--text-error);padding:8px 12px">Erreur chargement</li>';
      this._tagsSection.hidden = false;
    }
    this._collectItems();
  },

  _renderHistory(items, query) {
    this._historyList.innerHTML = "";
    items.forEach((entry) => {
      const li = el("li", { class: "search-dropdown__item search-dropdown__item--history", role: "option" });
      const iconEl = el("span", { class: "search-dropdown__icon" });
      iconEl.innerHTML = '<i data-lucide="clock" style="width:14px;height:14px"></i>';
      const textEl = el("span", { class: "search-dropdown__text" });
      textEl.textContent = entry;
      li.appendChild(iconEl);
      li.appendChild(textEl);
      li.addEventListener("click", () => {
        const input = document.getElementById("search-input");
        input.value = entry;
        input.dispatchEvent(new Event("input", { bubbles: true }));
        this.hide();
        _triggerAdvancedSearch(entry);
      });
      this._historyList.appendChild(li);
    });
  },

  _renderTitles(items, prefix) {
    this._titlesList.innerHTML = "";
    items.forEach((item) => {
      const li = el("li", { class: "search-dropdown__item search-dropdown__item--title", role: "option" });
      const iconEl = el("span", { class: "search-dropdown__icon" });
      iconEl.innerHTML = '<i data-lucide="file-text" style="width:14px;height:14px"></i>';
      const textEl = el("span", { class: "search-dropdown__text" });
      if (prefix) {
        this._highlightText(textEl, item.title, prefix);
      } else {
        textEl.textContent = item.title;
      }
      const metaEl = el("span", { class: "search-dropdown__meta" });
      metaEl.textContent = item.vault;
      li.appendChild(iconEl);
      li.appendChild(textEl);
      li.appendChild(metaEl);
      li.addEventListener("click", () => {
        this.hide();
        TabManager.openPreview(item.vault, item.path);
      });
      this._titlesList.appendChild(li);
    });
  },

  _renderTags(items, prefix) {
    this._tagsList.innerHTML = "";
    items.forEach((item) => {
      const li = el("li", { class: "search-dropdown__item search-dropdown__item--tag", role: "option" });
      const iconEl = el("span", { class: "search-dropdown__icon" });
      iconEl.innerHTML = '<i data-lucide="hash" style="width:14px;height:14px"></i>';
      const textEl = el("span", { class: "search-dropdown__text" });
      if (prefix) {
        this._highlightText(textEl, item.tag, prefix);
      } else {
        textEl.textContent = item.tag;
      }
      const badge = el("span", { class: "search-dropdown__badge" });
      badge.textContent = item.count;
      li.appendChild(iconEl);
      li.appendChild(textEl);
      li.appendChild(badge);
      li.addEventListener("click", () => {
        const input = document.getElementById("search-input");
        const current = input.value;
        const cursorPos = input.selectionStart;
        const ctx = QueryParser.getContext(current, cursorPos);
        if (ctx.type === "tag") {
          // Replace the partial tag prefix
          const before = current.slice(0, cursorPos - ctx.prefix.length);
          input.value = before + item.tag + " ";
        } else {
          // Replace the last word with tag: operator
          const words = current.trim().split(/\s+/);
          if (words.length > 0 && ctx.prefix && ctx.prefix.length > 0) {
            words[words.length - 1] = "";  // remove last partial word
          }
          const base = words.filter(w => w).join(" ");
          input.value = (base ? base + " " : "") + "tag:" + item.tag + " ";
        }
        input.dispatchEvent(new Event("input", { bubbles: true }));
        this.hide();
        input.focus();
        _triggerAdvancedSearch(input.value);
      });
      this._tagsList.appendChild(li);
    });
  },

  _highlightText(container, text, query) {
    const lower = text.toLowerCase();
    const needle = query.toLowerCase();
    const pos = lower.indexOf(needle);
    if (pos === -1) {
      container.textContent = text;
      return;
    }
    container.appendChild(document.createTextNode(text.slice(0, pos)));
    const markEl = el("mark", {}, [document.createTextNode(text.slice(pos, pos + query.length))]);
    container.appendChild(markEl);
    container.appendChild(document.createTextNode(text.slice(pos + query.length)));
  },

  _collectItems() {
    state.dropdownItems = Array.from(this._dropdown.querySelectorAll(".search-dropdown__item"));
    state.dropdownActiveIndex = -1;
    state.dropdownItems.forEach((item) => item.classList.remove("active"));
  },

  navigateDown() {
    if (!this.isVisible() || state.dropdownItems.length === 0) return;
    if (state.dropdownActiveIndex >= 0) state.dropdownItems[state.dropdownActiveIndex].classList.remove("active");
    state.dropdownActiveIndex = (state.dropdownActiveIndex + 1) % state.dropdownItems.length;
    state.dropdownItems[state.dropdownActiveIndex].classList.add("active");
    state.dropdownItems[state.dropdownActiveIndex].scrollIntoView({ block: "nearest" });
  },

  navigateUp() {
    if (!this.isVisible() || state.dropdownItems.length === 0) return;
    if (state.dropdownActiveIndex >= 0) state.dropdownItems[state.dropdownActiveIndex].classList.remove("active");
    state.dropdownActiveIndex = state.dropdownActiveIndex <= 0 ? state.dropdownItems.length - 1 : state.dropdownActiveIndex - 1;
    state.dropdownItems[state.dropdownActiveIndex].classList.add("active");
    state.dropdownItems[state.dropdownActiveIndex].scrollIntoView({ block: "nearest" });
  },

  selectActive() {
    if (state.dropdownActiveIndex >= 0 && state.dropdownActiveIndex < state.dropdownItems.length) {
      state.dropdownItems[state.dropdownActiveIndex].click();
      return true;
    }
    return false;
  },
};


// ---------------------------------------------------------------------------
// Search Chips Controller — renders active filter chips from parsed query
// ---------------------------------------------------------------------------
export const SearchChips = {
  _container: null,
  init() {
    this._container = document.getElementById("search-chips");
  },
  update(parsed) {
    if (!this._container) return;
    this._container.innerHTML = "";
    let hasChips = false;
    parsed.tags.forEach((tag) => {
      this._addChip("tag", `tag:${tag}`, tag);
      hasChips = true;
    });
    if (parsed.vault) {
      this._addChip("vault", `vault:${parsed.vault}`, parsed.vault);
      hasChips = true;
    }
    if (parsed.title) {
      this._addChip("title", `title:${parsed.title}`, parsed.title);
      hasChips = true;
    }
    if (parsed.path) {
      this._addChip("path", `path:${parsed.path}`, parsed.path);
      hasChips = true;
    }
    if (parsed.ext) {
      this._addChip("ext", `ext:${parsed.ext}`, parsed.ext);
      hasChips = true;
    }
    this._container.hidden = !hasChips;
  },
  clear() {
    if (!this._container) return;
    this._container.innerHTML = "";
    this._container.hidden = true;
  },
  _addChip(type, fullOperator, displayText) {
    const chip = el("span", { class: `search-chip search-chip--${type}` });
    const label = el("span", { class: "search-chip__label" });
    label.textContent = fullOperator;
    const removeBtn = el("button", { class: "search-chip__remove", title: "Retirer ce filtre", type: "button" });
    removeBtn.innerHTML = '<i data-lucide="x" style="width:10px;height:10px"></i>';
    removeBtn.addEventListener("click", () => {
      // Remove this operator from the input
      const input = document.getElementById("search-input");
      const raw = input.value;
      // Remove the operator text from the query
      const escaped = fullOperator.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
      input.value = raw.replace(new RegExp("\\s*" + escaped + "\\s*", "i"), " ").trim();
      _triggerAdvancedSearch(input.value);
    });
    chip.appendChild(label);
    chip.appendChild(removeBtn);
    this._container.appendChild(chip);
    safeCreateIcons();
  },
};


// ---------------------------------------------------------------------------
// Helper: trigger advanced search from input value
// ---------------------------------------------------------------------------
function _triggerAdvancedSearch(rawQuery) {
  const q = (rawQuery || "").trim();
  const vault = document.getElementById("vault-filter").value;
  const tagFilter = state.selectedTags.length > 0 ? state.selectedTags.join(",") : null;
  state.advancedSearchOffset = 0;
  if (q.length > 0 || tagFilter) {
    SearchHistory.add(q);
    performAdvancedSearch(q, vault, tagFilter);
  } else {
    SearchChips.clear();
    showWelcome();
  }
}


// ---------------------------------------------------------------------------
// Search (enhanced with autocomplete, keyboard nav, global shortcuts)
// ---------------------------------------------------------------------------
// ── Search toggle state ──

export function initSearch() {
  const input = document.getElementById("search-input");
  if (!input) return;
  const caseBtn = document.getElementById("search-case-btn");
  const wordBtn = document.getElementById("search-word-btn");
  const regexBtn = document.getElementById("search-regex-btn");
  const filterBtn = document.getElementById("search-filter-btn");
  const clearBtn = document.getElementById("search-clear-btn");
  const filterRow = document.getElementById("search-filter-row");
  const prevBtn = document.getElementById("search-prev-btn");
  const nextBtn = document.getElementById("search-next-btn");
  const countEl = document.getElementById("search-match-count");

  function _updateToggleUI() {
    caseBtn.classList.toggle("active", state.searchCaseSensitive);
    wordBtn.classList.toggle("active", state.searchWholeWord);
    regexBtn.classList.toggle("active", state.searchRegex);
    filterBtn.classList.toggle("active", state.searchFilterVisible);
  }

  // Toggle buttons
  caseBtn.addEventListener("click", () => { state.searchCaseSensitive = !state.searchCaseSensitive; _updateToggleUI(); _research(); });
  if (wordBtn) wordBtn.addEventListener("click", () => { state.searchWholeWord = !state.searchWholeWord; _updateToggleUI(); _research(); });
  if (regexBtn) regexBtn.addEventListener("click", () => { state.searchRegex = !state.searchRegex; _updateToggleUI(); _research(); });
  if (filterBtn) filterBtn.addEventListener("click", () => { state.searchFilterVisible = !state.searchFilterVisible; if (filterRow) filterRow.style.display = state.searchFilterVisible ? "flex" : "none"; _updateToggleUI(); });

  // ── Result navigation (up/down arrows + Enter) ──
  let _searchResultIdx = -1;
  let _searchResultItems = [];

  function _updateResultHighlight() {
    _searchResultItems.forEach((el, i) => {
      el.classList.toggle("search-result-active", i === _searchResultIdx);
    });
    if (_searchResultIdx >= 0 && _searchResultIdx < _searchResultItems.length) {
      _searchResultItems[_searchResultIdx].scrollIntoView({ block: "nearest", behavior: "smooth" });
    }
    const countEl = document.getElementById("search-match-count");
    if (countEl) countEl.textContent = _searchResultIdx >= 0 ? `${_searchResultIdx + 1}/${_searchResultItems.length}` : `0/${_searchResultItems.length}`;
  }

  function _refreshResultItems() {
    _searchResultItems = Array.from(document.querySelectorAll(".search-result-item"));
    _searchResultIdx = _searchResultItems.length > 0 ? 0 : -1;
    _updateResultHighlight();
  }

  window.navigateSearchResults = function(delta) {
    _searchResultItems = Array.from(document.querySelectorAll(".search-result-item"));
    if (_searchResultItems.length === 0) return;
    _searchResultIdx = Math.max(0, Math.min(_searchResultItems.length - 1, _searchResultIdx + delta));
    _updateResultHighlight();
  };

  if (prevBtn) prevBtn.addEventListener("click", () => navigateSearchResults(-1));
  if (nextBtn) nextBtn.addEventListener("click", () => navigateSearchResults(1));

  function _research() {
    const q = input.value.trim();
    if (q.length >= _getEffective("min_query_length", 2)) {
      clearTimeout(state.searchTimeout);
      state.searchTimeout = setTimeout(() => {
        const vault = document.getElementById("vault-filter").value;
        const tagFilter = state.selectedTags.length > 0 ? state.selectedTags.join(",") : null;
        state.advancedSearchOffset = 0;
        performAdvancedSearch(q, vault, tagFilter);
      }, _getEffective("debounce_ms", 300));
    }
  }

  // Keyboard shortcuts
  document.addEventListener("keydown", (e) => {
    if (e.altKey && !e.ctrlKey && !e.metaKey) {
      if (e.key === "c" || e.key === "C") { e.preventDefault(); caseBtn.click(); }
      else if (e.key === "w" || e.key === "W") { e.preventDefault(); if (wordBtn) wordBtn.click(); }
      else if (e.key === "r" || e.key === "R") { e.preventDefault(); if (regexBtn) regexBtn.click(); }
      else if (e.key === "f" || e.key === "F") { e.preventDefault(); if (filterBtn) filterBtn.click(); input.focus(); }
    }
  });

  // Initialize sub-controllers
  AutocompleteDropdown.init();
  SearchChips.init();

  // Initially hide clear button
  if (clearBtn) clearBtn.style.display = "none";

  // --- Input handler: debounced search + autocomplete dropdown ---
  input.addEventListener("input", () => {
    const hasText = input.value.length > 0;
    clearBtn.style.display = hasText ? "flex" : "none";

    // Show autocomplete dropdown while typing
    AutocompleteDropdown.populate(input.value, input.selectionStart);

    // Debounced search execution
    clearTimeout(state.searchTimeout);
    state.searchTimeout = setTimeout(
      () => {
        const q = input.value.trim();
        const vault = document.getElementById("vault-filter").value;
        const tagFilter = state.selectedTags.length > 0 ? state.selectedTags.join(",") : null;
        state.advancedSearchOffset = 0;
        if (q.length >= _getEffective("min_query_length", state.MIN_SEARCH_LENGTH) || tagFilter) {
          performAdvancedSearch(q, vault, tagFilter);
        } else if (q.length === 0) {
          SearchChips.clear();
          showWelcome();
        }
      },
      _getEffective("debounce_ms", 300),
    );
  });

  // --- Focus handler: show history dropdown ---
  input.addEventListener("focus", () => {
    if (input.value.length === 0) {
      const historyItems = SearchHistory.filter("").slice(0, 5);
      if (historyItems.length > 0) {
        AutocompleteDropdown.populate("", 0);
      }
    }
  });

  // --- Keyboard navigation in dropdown ---
  input.addEventListener("keydown", (e) => {
    if (AutocompleteDropdown.isVisible()) {
      if (e.key === "ArrowDown") {
        e.preventDefault();
        AutocompleteDropdown.navigateDown();
      } else if (e.key === "ArrowUp") {
        e.preventDefault();
        AutocompleteDropdown.navigateUp();
      } else if (e.key === "Enter") {
        // First: check dropdown suggestions (higher priority than search results)
        if (AutocompleteDropdown.isVisible() && AutocompleteDropdown.selectActive()) {
          e.preventDefault();
          return;
        }
        // Second: navigate search results if visible
        const results = document.querySelectorAll(".search-result-item");
        if (results.length > 0 && _searchResultIdx >= 0) {
          const el = results[_searchResultIdx];
          if (el) {
            const vault = el.dataset.vault;
            const path = el.dataset.path;
            if (vault && path) { TabManager.openPreview(vault, path); e.preventDefault(); return; }
          }
        }
        // Third: execute search
        AutocompleteDropdown.hide();
        const q = input.value.trim();
        if (q) {
          SearchHistory.add(q);
          clearTimeout(state.searchTimeout);
          state.advancedSearchOffset = 0;
          const vault = document.getElementById("vault-filter").value;
          const tagFilter = state.selectedTags.length > 0 ? state.selectedTags.join(",") : null;
          performAdvancedSearch(q, vault, tagFilter);
        }
        e.preventDefault();
      } else if (e.key === "ArrowDown" && !AutocompleteDropdown.isVisible()) {
        // Navigate search results when dropdown is closed
        if (window.navigateSearchResults) { window.navigateSearchResults(1); e.preventDefault(); }
      } else if (e.key === "ArrowUp" && !AutocompleteDropdown.isVisible()) {
        if (window.navigateSearchResults) { window.navigateSearchResults(-1); e.preventDefault(); }
      } else if (e.key === "Escape") {
        AutocompleteDropdown.hide();
        e.stopPropagation();
      }
    } else if (e.key === "Enter") {
      if (AutocompleteDropdown.isVisible() && AutocompleteDropdown.selectActive()) {
        e.preventDefault();
        return;
      }
      const q = input.value.trim();
      if (q) {
        SearchHistory.add(q);
        clearTimeout(state.searchTimeout);
        state.advancedSearchOffset = 0;
        const vault = document.getElementById("vault-filter").value;
        const tagFilter = state.selectedTags.length > 0 ? state.selectedTags.join(",") : null;
        performAdvancedSearch(q, vault, tagFilter);
      }
      e.preventDefault();
    }
  });

  clearBtn.addEventListener("click", () => {
    input.value = "";
    if (clearBtn) clearBtn.style.display = "none";
    state.searchCaseSensitive = false;
    state.searchWholeWord = false;
    state.searchRegex = false;
    _updateToggleUI();
    SearchChips.clear();
    AutocompleteDropdown.hide();
    showWelcome();
  });

  // --- Global keyboard shortcuts ---
  document.addEventListener("keydown", (e) => {
    // Ctrl+K or Cmd+K: focus search
    if ((e.ctrlKey || e.metaKey) && e.key === "k") {
      e.preventDefault();
      input.focus();
      input.select();
    }
    // "/" key: focus search (when not in an input/textarea)
    if (e.key === "/" && !_isInputFocused()) {
      e.preventDefault();
      input.focus();
    }
    // Escape: blur search input and close dropdown
    if (e.key === "Escape" && document.activeElement === input) {
      AutocompleteDropdown.hide();
      input.blur();
    }
  });
}

/** Check if user is focused on an input/textarea/contenteditable */
function _isInputFocused() {
  const tag = document.activeElement?.tagName;
  if (tag === "INPUT" || tag === "TEXTAREA" || tag === "SELECT") return true;
  return document.activeElement?.isContentEditable === true;
}

// --- Backward-compatible search (existing /api/search endpoint) ---
export async function performSearch(query, vaultFilter, tagFilter) {
  if (state.searchAbortController) state.searchAbortController.abort();
  state.searchAbortController = new AbortController();
  const searchId = ++state.currentSearchId;
  showLoading();
  let url = `/api/search?q=${encodeURIComponent(query)}&vault=${encodeURIComponent(vaultFilter)}`;
  if (tagFilter) url += `&tag=${encodeURIComponent(tagFilter)}`;
  try {
    const data = await api(url, { signal: state.searchAbortController.signal });
    if (searchId !== state.currentSearchId) return;
    renderSearchResults(data, query, tagFilter);
  } catch (err) {
    if (err.name === "AbortError") return;
    if (searchId !== state.currentSearchId) return;
    showWelcome();
  } finally {
    hideProgressBar();
    if (searchId === state.currentSearchId) state.searchAbortController = null;
  }
}

// --- Advanced search with TF-IDF, facets, pagination ---
export async function performAdvancedSearch(query, vaultFilter, tagFilter, offset, sort) {
  if (state.searchAbortController) state.searchAbortController.abort();
  state.searchAbortController = new AbortController();
  const searchId = ++state.currentSearchId;
  showLoading();

  const ofs = offset !== undefined ? offset : state.advancedSearchOffset;
  const sortBy = sort || state.advancedSearchSort;
  state.advancedSearchLastQuery = query;

  // Update chips from parsed query
  const parsed = QueryParser.parse(query);
  SearchChips.update(parsed);

  const effectiveLimit = _getEffective("results_per_page", state.ADVANCED_SEARCH_LIMIT);
  let url = `/api/search/advanced?q=${encodeURIComponent(query)}&vault=${encodeURIComponent(vaultFilter)}&limit=${effectiveLimit}&offset=${ofs}&sort=${sortBy}`;
  if (tagFilter) url += `&tag=${encodeURIComponent(tagFilter)}`;
  if (state.searchCaseSensitive) url += "&case_sensitive=true";
  if (state.searchWholeWord) url += "&whole_word=true";
  if (state.searchRegex) url += "&regex=true";
  const includeEl = document.getElementById("search-include-input");
  const excludeEl = document.getElementById("search-exclude-input");
  if (includeEl?.value.trim()) url += `&include_paths=${encodeURIComponent(includeEl.value.trim())}`;
  if (excludeEl?.value.trim()) url += `&exclude_paths=${encodeURIComponent(excludeEl.value.trim())}`;

  // Search timeout — abort if server takes too long
  const timeoutId = setTimeout(
    () => {
      if (state.searchAbortController) state.searchAbortController.abort();
    },
    _getEffective("search_timeout_ms", state.SEARCH_TIMEOUT_MS),
  );

  try {
    const data = await api(url, { signal: state.searchAbortController.signal });
    clearTimeout(timeoutId);
    if (searchId !== state.currentSearchId) return;
    state.advancedSearchTotal = data.total;
    state.advancedSearchOffset = ofs;
    renderAdvancedSearchResults(data, query, tagFilter);
  } catch (err) {
    clearTimeout(timeoutId);
    if (err.name === "AbortError") return;
    if (searchId !== state.currentSearchId) return;
    showWelcome();
  } finally {
    hideProgressBar();
    if (searchId === state.currentSearchId) state.searchAbortController = null;
  }
}

// --- Legacy search results renderer (kept for backward compat) ---
export function renderSearchResults(data, query, tagFilter) {
  const area = document.getElementById("content-area");
  area.innerHTML = "";
  const header = buildSearchResultsHeader(data, query, tagFilter);
  area.appendChild(header);
  if (data.results.length === 0) {
    area.appendChild(el("p", { style: "color:var(--text-muted);margin-top:20px" }, [document.createTextNode("Aucun résultat trouvé.")]));
    return;
  }
  const container = el("div", { class: "search-results" });
  data.results.forEach((r) => {
    // Apply client-side filtering for hidden files
    if (!shouldDisplayPath(r.path, r.vault)) {
      return; // Skip this result
    }

    const titleDiv = el("div", { class: "search-result-title" });
    if (query && query.trim()) {
      highlightSearchText(titleDiv, r.title, query, state.searchCaseSensitive);
    } else {
      titleDiv.textContent = r.title;
    }
    const snippetDiv = el("div", { class: "search-result-snippet" });
    if (r.snippet && r.snippet.includes("<mark>")) {
      snippetDiv.innerHTML = r.snippet;
    } else if (query && query.trim() && r.snippet) {
      highlightSearchText(snippetDiv, r.snippet, query, state.searchCaseSensitive);
    } else {
      snippetDiv.textContent = r.snippet || "";
    }
    const item = el("div", { class: "search-result-item", "data-vault": r.vault, "data-path": r.path }, [
      el("span", { class: "search-result-ext" }, [document.createTextNode(r.extension || (r.path || "").split(".").pop() || "")]),
      titleDiv,
      el("div", { class: "search-result-vault" }, [document.createTextNode(r.vault + " / " + r.path)]),
      snippetDiv
    ]);
    if (r.tags && r.tags.length > 0) {
      const tagsDiv = el("div", { class: "search-result-tags" });
      r.tags.forEach((tag) => {
        if (!TagFilterService.isTagFiltered(tag)) {
          const tagEl = el("span", { class: "file-tag" }, [document.createTextNode(`#${tag}`)]);
          tagEl.addEventListener("click", (e) => {
            e.stopPropagation();
            addTagFilter(tag);
          });
          tagsDiv.appendChild(tagEl);
        }
      });
      if (tagsDiv.children.length > 0) item.appendChild(tagsDiv);
    }
    item.addEventListener("click", () => TabManager.openPreview(r.vault, r.path));
    item.addEventListener("dblclick", (e) => { e.preventDefault(); TabManager.openPersistent(r.vault, r.path); });
    container.appendChild(item);
  });
  area.appendChild(container);
}

// --- Advanced search results renderer (facets, highlighted snippets, pagination, sort) ---
export function renderAdvancedSearchResults(data, query, tagFilter) {
  const area = document.getElementById("content-area");
  area.innerHTML = "";

  // Update match counter
  const countEl = document.getElementById("search-match-count");
  if (countEl) countEl.textContent = `${data.total > 0 ? "1" : "0"}/${data.total}`;

  // Header with result count and sort controls
  const header = el("div", { class: "search-results-header" });
  const summaryText = el("span", { class: "search-results-summary-text" });
  const parsed = QueryParser.parse(query);
  const freeText = parsed.freeText;

  if (freeText && tagFilter) {
    summaryText.textContent = `${data.total} résultat(s) pour "${freeText}" avec filtres`;
  } else if (freeText) {
    summaryText.textContent = `${data.total} résultat(s) pour "${freeText}"`;
  } else if (parsed.tags.length > 0 || tagFilter) {
    summaryText.textContent = `${data.total} fichier(s) avec filtres`;
  } else {
    summaryText.textContent = `${data.total} résultat(s)`;
  }
  if (data.query_time_ms !== undefined && data.query_time_ms > 0) {
    const timeBadge = el("span", { class: "search-time-badge" });
    timeBadge.textContent = `(${data.query_time_ms} ms)`;
    summaryText.appendChild(timeBadge);
  }
  header.appendChild(summaryText);

  // Active filter badges
  const filtersRow = el("div", { class: "search-filters-row" });
  if (state.searchCaseSensitive) filtersRow.appendChild(el("span", { class: "search-filter-badge" }, [document.createTextNode("Aa")]));
  if (state.searchWholeWord) filtersRow.appendChild(el("span", { class: "search-filter-badge" }, [document.createTextNode("wd")]));
  if (state.searchRegex) filtersRow.appendChild(el("span", { class: "search-filter-badge" }, [document.createTextNode(".*")]));
  const inclEl = document.getElementById("search-include-input");
  const exclEl = document.getElementById("search-exclude-input");
  if (inclEl?.value.trim()) filtersRow.appendChild(el("span", { class: "search-filter-badge path" }, [document.createTextNode("incl: " + inclEl.value.trim())]));
  if (exclEl?.value.trim()) filtersRow.appendChild(el("span", { class: "search-filter-badge path" }, [document.createTextNode("excl: " + exclEl.value.trim())]));
  if (filtersRow.children.length > 0) header.appendChild(filtersRow);

  // Sort controls
  const sortDiv = el("div", { class: "search-sort" });
  const btnRelevance = el("button", { class: "search-sort__btn" + (state.advancedSearchSort === "relevance" ? " active" : ""), type: "button" });
  btnRelevance.textContent = "Pertinence";
  btnRelevance.addEventListener("click", () => {
    state.advancedSearchSort = "relevance";
    state.advancedSearchOffset = 0;
    const vault = document.getElementById("vault-filter").value;
    performAdvancedSearch(query, vault, tagFilter, 0, "relevance");
  });
  const btnDate = el("button", { class: "search-sort__btn" + (state.advancedSearchSort === "modified" ? " active" : ""), type: "button" });
  btnDate.textContent = "Date";
  btnDate.addEventListener("click", () => {
    state.advancedSearchSort = "modified";
    state.advancedSearchOffset = 0;
    const vault = document.getElementById("vault-filter").value;
    performAdvancedSearch(query, vault, tagFilter, 0, "modified");
  });
  sortDiv.appendChild(btnRelevance);
  sortDiv.appendChild(btnDate);
  header.appendChild(sortDiv);

  // Save search button
  const saveBtn = el("button", { class: "search-save-btn", type: "button", title: "Sauvegarder cette recherche" });
  saveBtn.innerHTML = '<i data-lucide="bookmark-plus" style="width:14px;height:14px"></i> Sauver';
  saveBtn.addEventListener("click", async () => {
    const inclEl = document.getElementById("search-include-input");
    const exclEl = document.getElementById("search-exclude-input");
    try {
      await api("/api/saved-searches", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          query: query,
          vault: document.getElementById("vault-filter")?.value || "all",
          case_sensitive: state.searchCaseSensitive,
          whole_word: state.searchWholeWord,
          regex: state.searchRegex,
          include_paths: inclEl?.value || "",
          exclude_paths: exclEl?.value || "",
        }),
      });
      showToast("Recherche sauvegardée", "success");
    } catch (err) { showToast("Erreur: " + err.message, "error"); }
  });
  header.appendChild(saveBtn);
  area.appendChild(header);

  // Active sidebar tag chips
  if (state.selectedTags.length > 0) {
    const activeTags = el("div", { class: "search-results-active-tags" });
    state.selectedTags.forEach((tag) => {
      const removeBtn = el(
        "button",
        {
          class: "search-results-active-tag-remove",
          title: `Retirer ${tag} du filtre`,
        },
        [document.createTextNode("×")],
      );
      removeBtn.addEventListener("click", (e) => {
        e.stopPropagation();
        removeTagFilter(tag);
      });
      const chip = el("span", { class: "search-results-active-tag" }, [document.createTextNode(`#${tag}`), removeBtn]);
      activeTags.appendChild(chip);
    });
    area.appendChild(activeTags);
  }

  // Facets panel
  if (data.facets && (Object.keys(data.facets.tags || {}).length > 0 || Object.keys(data.facets.vaults || {}).length > 0)) {
    const facetsDiv = el("div", { class: "search-facets" });

    // Vault facets
    const vaultFacets = data.facets.vaults || {};
    if (Object.keys(vaultFacets).length > 1) {
      const group = el("div", { class: "search-facets__group" });
      const label = el("span", { class: "search-facets__label" });
      label.textContent = "Vaults";
      group.appendChild(label);
      for (const [vaultName, count] of Object.entries(vaultFacets)) {
        const item = el("span", { class: "search-facets__item" });
        item.innerHTML = `${vaultName} <span class="facet-count">${count}</span>`;
        item.addEventListener("click", () => {
          const input = document.getElementById("search-input");
          // Add vault: operator
          const current = input.value.replace(/vault:\S+\s*/gi, "").trim();
          input.value = current + " vault:" + vaultName;
          _triggerAdvancedSearch(input.value);
        });
        group.appendChild(item);
      }
      facetsDiv.appendChild(group);
    }

    // Tag facets
    const tagFacets = data.facets.tags || {};
    if (Object.keys(tagFacets).length > 0) {
      const group = el("div", { class: "search-facets__group" });
      const label = el("span", { class: "search-facets__label" });
      label.textContent = "Tags";
      group.appendChild(label);
      const entries = Object.entries(tagFacets).slice(0, 12);
      for (const [tagName, count] of entries) {
        const item = el("span", { class: "search-facets__item" });
        item.innerHTML = `#${tagName} <span class="facet-count">${count}</span>`;
        item.addEventListener("click", () => {
          addTagFilter(tagName);
        });
        group.appendChild(item);
      }
      facetsDiv.appendChild(group);
    }

    area.appendChild(facetsDiv);
  }

  // Empty state
  if (data.results.length === 0) {
    area.appendChild(el("p", { style: "color:var(--text-muted);margin-top:20px" }, [document.createTextNode("Aucun résultat trouvé.")]));
    return;
  }

  // Results list
  const container = el("div", { class: "search-results" });
  data.results.forEach((r) => {
    // Apply client-side filtering for hidden files
    if (!shouldDisplayPath(r.path, r.vault)) {
      return; // Skip this result
    }

    const titleDiv = el("div", { class: "search-result-title" });
    if (freeText) {
      highlightSearchText(titleDiv, r.title, freeText, state.searchCaseSensitive);
    } else {
      titleDiv.textContent = r.title;
    }

    // Snippet — use HTML from backend (already has <mark> tags)
    const snippetDiv = el("div", { class: "search-result-snippet search-result__snippet" });
    if (r.snippet && r.snippet.includes("<mark>")) {
      snippetDiv.innerHTML = r.snippet;
    } else if (freeText && r.snippet) {
      highlightSearchText(snippetDiv, r.snippet, freeText, state.searchCaseSensitive);
    } else {
      snippetDiv.textContent = r.snippet || "";
    }

    // Score badge
    const scoreEl = el("span", { class: "search-result-score", style: "font-size:0.7rem;color:var(--text-muted);margin-left:8px" });
    scoreEl.textContent = `score: ${r.score}`;

    const vaultPath = el("div", { class: "search-result-vault" }, [document.createTextNode(r.vault + " / " + r.path), scoreEl]);

    const item = el("div", { class: "search-result-item", "data-vault": r.vault, "data-path": r.path }, [
      el("span", { class: "search-result-ext" }, [document.createTextNode(r.extension || (r.path || "").split(".").pop() || "")]),
      titleDiv, vaultPath, snippetDiv
    ]);

    if (r.tags && r.tags.length > 0) {
      const tagsDiv = el("div", { class: "search-result-tags" });
      r.tags.forEach((tag) => {
        if (!TagFilterService.isTagFiltered(tag)) {
          const tagEl = el("span", { class: "file-tag" }, [document.createTextNode(`#${tag}`)]);
          tagEl.addEventListener("click", (e) => {
            e.stopPropagation();
            addTagFilter(tag);
          });
          tagsDiv.appendChild(tagEl);
        }
      });
      if (tagsDiv.children.length > 0) item.appendChild(tagsDiv);
    }

    item.addEventListener("click", () => TabManager.openPreview(r.vault, r.path));
    item.addEventListener("dblclick", (e) => { e.preventDefault(); TabManager.openPersistent(r.vault, r.path); });
    container.appendChild(item);
  });
  area.appendChild(container);

  // Pagination
  if (data.total > state.ADVANCED_SEARCH_LIMIT) {
    const paginationDiv = el("div", { class: "search-pagination" });
    const prevBtn = el("button", { class: "search-pagination__btn", type: "button" });
    prevBtn.textContent = "← Précédent";
    prevBtn.disabled = state.advancedSearchOffset === 0;
    prevBtn.addEventListener("click", () => {
      state.advancedSearchOffset = Math.max(0, state.advancedSearchOffset - state.ADVANCED_SEARCH_LIMIT);
      const vault = document.getElementById("vault-filter").value;
      performAdvancedSearch(query, vault, tagFilter, state.advancedSearchOffset);
      document.getElementById("content-area").scrollTop = 0;
    });

    const info = el("span", { class: "search-pagination__info" });
    const from = state.advancedSearchOffset + 1;
    const to = Math.min(state.advancedSearchOffset + state.ADVANCED_SEARCH_LIMIT, data.total);
    info.textContent = `${from}–${to} sur ${data.total}`;

    const nextBtn = el("button", { class: "search-pagination__btn", type: "button" });
    nextBtn.textContent = "Suivant →";
    nextBtn.disabled = state.advancedSearchOffset + state.ADVANCED_SEARCH_LIMIT >= data.total;
    nextBtn.addEventListener("click", () => {
      state.advancedSearchOffset += state.ADVANCED_SEARCH_LIMIT;
      const vault = document.getElementById("vault-filter").value;
      performAdvancedSearch(query, vault, tagFilter, state.advancedSearchOffset);
      document.getElementById("content-area").scrollTop = 0;
    });

    paginationDiv.appendChild(prevBtn);
    paginationDiv.appendChild(info);
    paginationDiv.appendChild(nextBtn);
    area.appendChild(paginationDiv);
  }

  safeCreateIcons();
  // Initialize result navigation (select first result)
  setTimeout(() => { if (window.navigateSearchResults) window.navigateSearchResults(0); }, 50);
}