// Photos tab: now-displaying, album picker, and the upcoming grid
// (rendering/drag logic in queue.js). window.FRAME_API is set by the
// template.

function renderControlBanner(control) {
  const banner = document.getElementById('control-banner');
  if (!banner) return;
  if (!control || control.you) {
    banner.style.display = 'none';
    return;
  }
  banner.style.display = 'flex';
  document.getElementById('control-holder').textContent = control.controller
    ? `${control.controller} currently has control of this frame.`
    : 'Nobody has control of this frame yet.';
}

async function takeControl() {
  try {
    const resp = await fetch(`${window.FRAME_API}/take-control`, { method: 'POST' });
    if (!resp.ok) throw new Error(await apiError(resp));
    showStatus(true, 'You have control now.');
    loadQueue();
  } catch (e) {
    showStatus(false, e.message);
  }
}

async function loadQueue() {
  if (dragState) {
    return; // don't yank the grid out from under an in-progress drag
  }
  const currentEl = document.getElementById('current-thumb');
  try {
    const resp = await fetch(`${window.FRAME_API}/queue`);
    if (!resp.ok) {
      currentEl.innerHTML =
        '<p class="sub">Not available yet -- the owner needs to connect Immich (Settings) and pick an album.</p>';
      renderUpcoming([]);
      return;
    }
    const data = await resp.json();
    currentEl.innerHTML = '';
    if (data.current) {
      const wrap = document.createElement('div');
      wrap.className = 'thumb-wrap';

      const img = document.createElement('img');
      img.className = 'thumb';
      img.src = data.current.thumbnail_url;
      img.alt = '';
      wrap.appendChild(img);

      const removeBtn = document.createElement('button');
      removeBtn.type = 'button';
      removeBtn.className = 'remove-btn';
      removeBtn.title = 'Remove from rotation';
      removeBtn.textContent = '×';
      removeBtn.addEventListener('click', () => removeAsset(data.current.id));
      wrap.appendChild(removeBtn);

      currentEl.appendChild(wrap);
    } else {
      currentEl.innerHTML = '<p class="sub">Nothing displayed yet.</p>';
    }
    renderControlBanner(data.control);
    renderUpcoming(data.upcoming);
  } catch (e) {
    currentEl.innerHTML = '<p class="sub">Could not load.</p>';
  }
}

async function savePhotoSettings() {
  const body = new URLSearchParams({
    album_id: document.getElementById('album_id').value || '',
    queue_target_len: document.getElementById('queue_target_len').value,
  });
  const resp = await fetch(`${window.FRAME_API}/config`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    body,
  });
  if (!resp.ok) {
    throw new Error(await apiError(resp));
  }
}

document.getElementById('load-albums').addEventListener('click', async () => {
  try {
    const resp = await fetch(`${window.FRAME_API}/albums`);
    if (!resp.ok) {
      throw new Error(await apiError(resp));
    }
    const albums = await resp.json();

    const select = document.getElementById('album_id');
    select.innerHTML = '';
    for (const a of albums) {
      const opt = document.createElement('option');
      opt.value = a.id;
      opt.textContent = `${a.name} (${a.count})`;
      select.appendChild(opt);
    }
    showStatus(true, `Loaded ${albums.length} album(s) -- pick one and click Save.`);
  } catch (e) {
    showStatus(false, e.message);
  }
});

document.getElementById('photos-form').addEventListener('submit', async (e) => {
  e.preventDefault();
  try {
    await savePhotoSettings();
    showStatus(true, 'Saved.');
    loadQueue();
  } catch (e) {
    showStatus(false, e.message);
  }
});

document.getElementById('take-control').addEventListener('click', takeControl);

loadQueue();
// Slow poll: picks up real changes (new photo displayed, queue edited
// from elsewhere) without a manual refresh. Skipped mid-drag.
setInterval(loadQueue, 10000);