// Photos widget dialog: now-displaying, album picker, order/display-mode
// settings, and the upcoming grid (rendering/drag logic in queue.js).
// Not a page-load script -- frame_layout.js fetches this widget's dialog
// HTML fragment, injects it into the shared <dialog>, points
// window.FRAME_API at this specific widget (/api/frames/{id}/widgets/
// {widget_id}), then calls initPhotosDialog(). closePhotosDialog() stops
// the poll interval when the dialog closes, same "expects window.
// FRAME_API + a global loadQueue()" contract queue.js has always had.

let photosPollTimer = null;
let photoLocked = false;
let photoHasCurrent = false;

function renderLockButton() {
  const btn = document.getElementById('lock-photo-btn');
  if (!btn) return;
  btn.textContent = photoLocked ? 'Unlock this photo' : 'Lock this photo';
  btn.classList.toggle('active', photoLocked);
  btn.disabled = !photoHasCurrent && !photoLocked; // nothing displayed yet to lock
}

async function toggleLock() {
  const next = !photoLocked;
  try {
    const resp = await fetch(`${window.FRAME_API}/lock`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ locked: next }),
    });
    if (!resp.ok) throw new Error(await apiError(resp));
    photoLocked = next;
    renderLockButton();
    showStatus(true, photoLocked ? 'Locked -- this photo will stay put.' : 'Unlocked.');
  } 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');
  if (!currentEl) return; // dialog closed mid-flight
  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([]);
      photoHasCurrent = false;
      renderLockButton();
      return;
    }
    const data = await resp.json();
    photoLocked = !!data.locked;
    photoHasCurrent = !!data.current;
    renderLockButton();
    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>';
    }
    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,
    order: document.getElementById('order').value,
    display_mode: document.getElementById('display_mode').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));
  }
}

function initPhotosDialog() {
  document.getElementById('load-albums').addEventListener('click', async () => {
    try {
      // /albums is frame-level (routers/api_frames.py) -- it lists the
      // frame owner's whole Immich library, not something scoped to
      // this one photo widget -- so it uses window.FRAME_BASE_API (the
      // stable frame-level base), not window.FRAME_API (repointed to
      // this widget's own API base while the dialog is open).
      const resp = await fetch(`${window.FRAME_BASE_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('lock-photo-btn').addEventListener('click', toggleLock);

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

function closePhotosDialog() {
  clearInterval(photosPollTimer);
  photosPollTimer = null;
}