(function () {
  'use strict';

  const browser = globalThis.browser || globalThis.chrome;

  if (window.__takeid_content_script__) return;
  window.__takeid_content_script__ = true;

  // Cache des items recus du script injecte: [{index, id, code}]
  let dataCache = [];
  let lastCacheTimestamp = 0;

  // ----- Injection de injected.js dans le contexte page -----
  function injectPageScript() {
    try {
      const script = document.createElement('script');
      script.src = browser.runtime.getURL('content/injected.js');
      script.async = false;
      script.onload = function () {
        // Une fois execute, on retire l'element pour ne pas polluer le DOM
        if (script.parentNode) script.parentNode.removeChild(script);
      };
      (document.head || document.documentElement).appendChild(script);
    } catch (e) {
      // swallow
    }
  }
  injectPageScript();

  // ----- Reception des donnees de injected.js -----
  // Note: on ne filtre PAS sur event.source car sur Firefox le content script
  // utilise un Xray wrapper et event.source !== window meme si c'est la meme page.
  window.addEventListener('message', (event) => {
    const data = event.data;
    if (!data || typeof data !== 'object') return;
    if (data.type !== 'TAKEID_DATA') return;
    if (!Array.isArray(data.items)) return;

    // Ne pas ecraser le cache avec une reponse vide (certains appels getDataViewList
    // sont des requetes de count/metadata qui retournent datos=[])
    if (data.items.length === 0) {
      console.log('[TakeID] Ignoring empty getDataViewList response (keeping', dataCache.length, 'items in cache)');
      return;
    }
    dataCache = data.items;
    lastCacheTimestamp = data.timestamp || Date.now();
    console.log('[TakeID] Cache updated:', dataCache.length, 'items');
  });

  // ----- Lecture du DOM : trouver les lignes selectionnees -----
  function normalizeCode(s) {
    if (s === null || s === undefined) return '';
    return String(s).trim();
  }

  function findGridRoot() {
    // Heuristique : chercher un conteneur de grille
    const candidates = [
      '.k-grid',
      '[role="grid"]',
      'table.grid',
      '.smartui-grid',
      'table'
    ];
    for (const sel of candidates) {
      const el = document.querySelector(sel);
      if (el) return el;
    }
    return document;
  }

  function getAllDataRows(root) {
    // Recupere toutes les lignes "data" (potentiellement tr ou divs)
    let rows = root.querySelectorAll('tr[role="row"]');
    if (rows && rows.length) return Array.from(rows);

    rows = root.querySelectorAll('tbody > tr');
    if (rows && rows.length) return Array.from(rows);

    rows = root.querySelectorAll('[role="row"]');
    if (rows && rows.length) return Array.from(rows);

    rows = root.querySelectorAll('.k-grid-content tr');
    if (rows && rows.length) return Array.from(rows);

    return [];
  }

  function isHeaderRow(row) {
    if (!row) return false;
    if (row.matches && (row.matches('thead tr') || row.matches('[role="row"][aria-rowindex="1"]'))) return true;
    // ligne sans cellules <td>, juste des <th>
    if (row.querySelector && row.querySelector('th') && !row.querySelector('td')) return true;
    return false;
  }

  function rowIsSelected(row) {
    if (!row) return false;

    // 1. classes communes
    const selectedClasses = ['selected', 'k-state-selected', 'k-selected', 'is-selected', 'row-selected', 'active'];
    if (row.classList) {
      for (const cls of selectedClasses) {
        if (row.classList.contains(cls)) return true;
      }
    }

    // 2. aria-selected
    if (row.getAttribute && row.getAttribute('aria-selected') === 'true') return true;

    // 3. checkbox cochee a l'interieur de la ligne
    const cb = row.querySelector && row.querySelector('input[type="checkbox"]');
    if (cb && cb.checked) return true;

    return false;
  }

  function extractCodeFromRow(row) {
    if (!row) return null;

    // 1. data-attribute eventuel
    const dataAttrs = ['data-code', 'data-key', 'data-id'];
    for (const a of dataAttrs) {
      const v = row.getAttribute && row.getAttribute(a);
      if (v) return normalizeCode(v);
    }

    // 2. premier lien clickable (souvent la colonne Code dans SmartUI)
    const link = row.querySelector && row.querySelector('a');
    if (link && link.textContent) {
      const t = normalizeCode(link.textContent);
      if (t) return t;
    }

    // 3. premiere cellule "non checkbox"
    const cells = row.querySelectorAll ? row.querySelectorAll('td') : [];
    for (const cell of cells) {
      if (cell.querySelector('input[type="checkbox"]')) continue;
      const t = normalizeCode(cell.textContent);
      if (t) return t;
    }

    return null;
  }

  function indexOfDataRow(row, allRows) {
    // Trouve l'index de la ligne dans la sequence des lignes "data" (hors header)
    const dataRows = allRows.filter((r) => !isHeaderRow(r));
    return dataRows.indexOf(row);
  }

  function getSelectedIds() {
    const root = findGridRoot();
    const allRows = getAllDataRows(root);
    const dataRows = allRows.filter((r) => !isHeaderRow(r));

    const selectedRows = dataRows.filter(rowIsSelected);

    // Strategie A : trouver via le code (lookup dans le cache)
    const cacheByCode = new Map();
    for (const item of dataCache) {
      if (item.code) cacheByCode.set(normalizeCode(item.code), item.id);
    }

    const pairs = [];
    const seen = new Set();

    for (const row of selectedRows) {
      let id = null;
      let resolvedCode = null;

      const code = extractCodeFromRow(row);
      if (code && cacheByCode.has(code)) {
        id = cacheByCode.get(code);
        resolvedCode = code;
      }

      // Strategie B : par index si le code n'a pas matche
      if (!id) {
        const idx = dataRows.indexOf(row);
        if (idx >= 0 && idx < dataCache.length) {
          id = dataCache[idx].id;
          resolvedCode = dataCache[idx].code || code || null;
        }
      }

      if (id && !seen.has(id)) {
        seen.add(id);
        pairs.push({ id, code: resolvedCode });
      }
    }

    return {
      pairs,
      ids: pairs.map((p) => p.id),
      selectedCount: selectedRows.length,
      cacheSize: dataCache.length,
      cacheTimestamp: lastCacheTimestamp
    };
  }

  // ----- Reception des messages du popup -----
  browser.runtime.onMessage.addListener((msg, sender, sendResponse) => {
    if (!msg || typeof msg !== 'object') return false;

    if (msg.type === 'TAKEID_PING') {
      sendResponse({ ok: true, cacheSize: dataCache.length });
      return false;
    }

    if (msg.type === 'GET_SELECTED_IDS') {
      try {
        const result = getSelectedIds();
        sendResponse({ ok: true, ...result });
      } catch (e) {
        sendResponse({ ok: false, error: String(e && e.message ? e.message : e) });
      }
      return false;
    }

    return false;
  });
})();