// Injected into the MyAbacus page (content script world, needs util.js + parse.js).
// Walks the "Gestion des temps" card day by day with the ‹ › buttons and stores results
// in browser.storage.local as it goes, so the popup can be closed meanwhile.
var AbacusCrawl = (() => {
  const SEL = {
    left: '[movie-id="leftButton"]',
    right: '[movie-id="rightButton"]',
    nav: '.proj-date-navigation',
    from: '[id^="id_history_from_"]',
    to: '[id^="id_history_to_"]',
    total: '.total-label .va-label-text',
  };
  const DATE_RE = /(\d{1,2})\.(\d{1,2})\.(\d{4})/;
  const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

  // Vaadin renders inside shadow roots: plain document.querySelector can't see them.
  // Firefox content scripts also get closed roots through openOrClosedShadowRoot.
  const shadowOf = (el) => el.openOrClosedShadowRoot || el.shadowRoot || null;

  function allRoots(root = document, out = []) {
    out.push(root);
    const walker = document.createTreeWalker(root, NodeFilter.SHOW_ELEMENT);
    for (let n = walker.currentNode; n; n = walker.nextNode()) {
      const sr = n.nodeType === 1 && shadowOf(n);
      if (sr) allRoots(sr, out);
    }
    return out;
  }

  function deepFind(sel) {
    for (const r of allRoots()) {
      const el = r.querySelector(sel);
      if (el) return el;
    }
    return null;
  }

  function findRightButton() {
    return deepFind(SEL.right) || deepFind('.fa-angle-right')?.closest('vaadin-button, button') || null;
  }

  // Root node (document or shadow root) holding the card; re-located if Vaadin re-renders it
  let card = null;
  function root() {
    if (!card || !card.btn.isConnected) {
      const btn = findRightButton();
      card = btn ? { btn, node: btn.getRootNode() } : null;
    }
    return card?.node || null;
  }
  const q = (sel) => root()?.querySelector(sel) || null;
  const qa = (sel) => [...(root()?.querySelectorAll(sel) || [])];

  const present = () => !!root();

  function readDate() {
    const nav = q(SEL.nav) || card?.btn.parentElement;
    if (!nav) return null;
    // sr-only "Date actuelle 02.10.2026", else the date picker input
    const m = DATE_RE.exec(nav.textContent) || DATE_RE.exec(nav.querySelector('input')?.value || '');
    return m ? `${m[3]}-${m[2].padStart(2, '0')}-${m[1].padStart(2, '0')}` : null;
  }

  // Native <input slot="input"> inside the vaadin-text-field (custom element props aren't visible from here)
  const fieldValue = (tf) => ((tf.tagName === 'INPUT' ? tf : tf.querySelector('input'))?.value || '').trim();
  const suffix = (tf) => tf.id.replace(/^id_history_(from|to)_/, '');

  function readDay() {
    const tos = new Map(qa(SEL.to).map((tf) => [suffix(tf), fieldValue(tf)]));
    const intervals = [], open = [];
    for (const tf of qa(SEL.from)) {
      const s = U.toMin(fieldValue(tf)), e = U.toMin(tos.get(suffix(tf)) || '');
      if (s == null) continue;
      if (e == null) open.push(U.fmtTime(s));
      else if (e > s) intervals.push({ start: s, end: e });
    }
    const totalText = q(SEL.total)?.textContent.trim() || '';
    return { date: readDate(), intervals: AbacusParse.union(intervals), open, total: U.toMin(totalText) };
  }

  // What this frame sees, to explain a "not found"
  function diagnose() {
    const roots = allRoots();
    return {
      url: location.href,
      shadowRoots: roots.length - 1,
      angleRight: roots.some((r) => r.querySelector('.fa-angle-right')),
      title: roots.some((r) => /Gestion des temps/.test(r.textContent || '')),
    };
  }

  // Wait until the date changed and the card content stopped moving
  async function waitLoaded(prevDate, timeout = 15000) {
    const t0 = Date.now();
    while (readDate() === prevDate) {
      if (Date.now() - t0 > timeout) throw new Error(`MyAbacus did not move away from ${U.fmtDate(prevDate)}`);
      await sleep(100);
    }
    let last = '', stable = 0;
    while (stable < 3 && Date.now() - t0 < timeout) {
      await sleep(150);
      const snap = JSON.stringify(readDay());
      stable = snap === last ? stable + 1 : 0;
      last = snap;
    }
  }

  async function step(dir) {
    const prev = readDate();
    const btn = dir < 0 ? (q(SEL.left) || deepFind('.fa-angle-left')?.closest('vaadin-button, button')) : findRightButton();
    btn.click();
    await waitLoaded(prev);
  }

  function toLines(days) {
    return days.map((d) => {
      const iv = d.intervals.map((i) => `${U.fmtTime(i.start)}-${U.fmtTime(i.end)}`).join(' ');
      const sum = AbacusParse.sumIntervals(d.intervals);
      const notes = [];
      if (d.open.length) notes.push(`clocked in at ${d.open.join(', ')} without leaving`);
      if (d.total != null && d.intervals.length && d.total !== sum) notes.push(`Abacus total says ${U.fmtDur(d.total)}`);
      const note = notes.length ? `  # ${notes.join('; ')}` : '';
      if (iv) return `${U.fmtDate(d.date)} ${iv}${note}`;
      if (d.total) return `${U.fmtDate(d.date)} ${U.fmtDur(d.total)}${note}`;
      return `# ${U.fmtDate(d.date)} nothing${note}`;
    }).join('\n');
  }

  async function run(from, to) {
    if (window.__abacusCrawling) return { error: 'already running' };
    if (!present()) return { skipped: true, ...diagnose() }; // other frame
    window.__abacusCrawling = true;
    const progress = (p) => browser.storage.local.set({ crawl: { ...p, at: new Date().toISOString() } });
    const days = [];
    try {
      await browser.storage.local.remove('crawlStop');
      let cur = readDate();
      if (!cur) throw new Error('Cannot read the current date in the card');
      const maxSteps = 400;
      let n = 0;
      // Move to `from` (two one-way loops: never oscillates if a day can't be shown)
      for (const dir of [-1, 1]) {
        while (dir < 0 ? cur > from : cur < from) {
          if (++n > maxSteps) throw new Error('Too many steps');
          await progress({ status: 'running', message: `Navigating to ${U.fmtDate(from)} (at ${U.fmtDate(cur)})` });
          await step(dir);
          cur = readDate();
        }
      }
      // Read each day up to `to`
      for (;;) {
        const { crawlStop } = await browser.storage.local.get('crawlStop');
        if (crawlStop) throw new Error('Stopped');
        days.push(readDay());
        await progress({ status: 'running', message: `Read ${U.fmtDate(cur)} (${days.length} day(s))` });
        if (cur >= to || ++n > maxSteps) break;
        await step(1);
        cur = readDate();
      }
      const text = toLines(days);
      const parsed = AbacusParse.fromText(text).days;
      await browser.storage.local.set({
        daysText: text,
        extractInfo: { at: new Date().toISOString(), url: location.href, count: parsed.length, raw: days.map((d) => JSON.stringify(d)) },
      });
      await progress({ status: 'done', message: `Done: ${parsed.length} worked day(s) between ${U.fmtDate(from)} and ${U.fmtDate(to)}` });
      return { days };
    } catch (e) {
      if (days.length) await browser.storage.local.set({ daysText: toLines(days) + `\n# stopped: ${e.message}` });
      await progress({ status: 'error', message: e.message });
      return { error: e.message };
    } finally {
      window.__abacusCrawling = false;
    }
  }

  return { run, readDay, readDate, present, diagnose };
})();