// Paid shorts: a full-screen vertical feed over the video-ad inventory. You must
// watch each short's required time (server-clock enforced, no seek) to earn,
// then advance to the next. Reuses /api/my/videos + /api/my/videowatch.
(function () {
  const $ = id => document.getElementById(id);
  const st = { token: null, secs: 0, maxSeen: 0, credited: false, done: false, skips: 0 };
  function j(url, body) {
    return fetch(url, body
      ? { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) }
      : undefined).then(r => r.json());
  }
  async function load() {
    st.token = null; st.maxSeen = 0; st.credited = false; st.done = false;
    $('shOver').hidden = true; $('shCta').hidden = true; $('shNext').hidden = true;
    let r = null;
    // signed-out visitors get the sign-in note without a 401 round trip
    let me = null; try { me = await j('/api/me'); } catch (e) {}
    if (me && me.signedIn && me.email) { try { r = await j('/api/my/videos?orientation=portrait'); } catch (e) {} }
    if (!r || r.error) { $('shVideo').hidden = true; $('shMsg').hidden = false; $('shMsg').textContent = 'Sign in on the dashboard to watch shorts and earn.'; return; }
    $('shStat').textContent = 'today: ' + (r.status.count || 0) + ' / ' + r.status.cap;
    if (!r.ad) {
      $('shVideo').hidden = true; $('shMsg').hidden = false;
      $('shMsg').textContent = r.status.left <= 0 ? 'That\'s today\'s shorts. Come back tomorrow.' : 'No shorts in rotation right now. Check back soon.';
      return;
    }
    st.token = r.token; st.secs = r.ad.watchSecs; st.adId = r.ad.id;
    const v = $('shVideo');
    $('shMsg').hidden = true; v.hidden = false;
    v.src = r.ad.videoUrl; v.currentTime = 0;
    // safety net: this reel is portrait-only. If a landscape video slips through, skip to the next.
    v.onloadedmetadata = () => {
      if (v.videoWidth && v.videoHeight && v.videoWidth > v.videoHeight) {
        if (st.skips++ < 4) { load(); return; }
        v.hidden = true; $('shMsg').hidden = false; $('shMsg').textContent = 'No shorts in rotation right now. Check back soon.';
      } else { st.skips = 0; }
    };
    $('shTitle').textContent = r.ad.title || '';
    $('shCta').href = r.ad.ctaUrl; $('shCta').textContent = r.ad.ctaLabel || 'Learn more';
    $('shOver').hidden = false; $('shCta').hidden = false;
    v.onseeking = () => { if (v.currentTime > st.maxSeen + 0.5) v.currentTime = st.maxSeen; };
    v.ontimeupdate = () => {
      if (v.currentTime > st.maxSeen) st.maxSeen = v.currentTime;
      const left = Math.max(0, Math.ceil(st.secs - st.maxSeen));
      $('shTimer').textContent = left > 0 ? 'Watch ' + left + 's more to earn' : 'Earned — swipe to the next';
      if (!st.done && st.maxSeen >= st.secs) { st.done = true; credit(); }
    };
    v.play().catch(() => {});
  }
  async function credit() {
    if (st.credited) return; st.credited = true;
    try {
      const r = await j('/api/my/videowatch', { token: st.token });
      if (r.credited) { $('shStat').textContent = 'today: ' + (r.status.count || 0) + ' / ' + (r.status.cap || 0) + ' · +' + r.credited; }
    } catch (e) {}
    $('shNext').hidden = false;
  }
  $('shNext').addEventListener('click', load);
  $('shReport').addEventListener('click', e => {
    e.preventDefault(); if (!st.adId) return;
    const reason = (prompt('Report this short: broken, inappropriate, spam, scam, or other', 'inappropriate') || '').trim().toLowerCase();
    if (!reason) return;
    fetch('/api/report-ad', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ campaignId: st.adId, reason }) })
      .then(() => { $('shReport').textContent = '✓ reported — thanks'; }).catch(() => {});
  });
  // presence enforcement: pause when the tab/window loses focus, resume on return
  document.addEventListener('visibilitychange', () => {
    const v = $('shVideo'); if (!v || !v.src) return;
    if (document.hidden) v.pause(); else if (!st.done) v.play().catch(() => {});
  });
  window.addEventListener('blur', () => { const v = $('shVideo'); if (v && v.src) v.pause(); });
  window.addEventListener('focus', () => { const v = $('shVideo'); if (v && v.src && !st.done) v.play().catch(() => {}); });
  // tap the video to pause/resume
  $('shVideo').addEventListener('click', () => { const v = $('shVideo'); if (v.paused) v.play(); else v.pause(); });
  load();
})();