// === Frambe - Frontend Application ===
(function () {
  'use strict';
  var config = {}, assets = [], currentIndex = -1, activeLayer = 'a', slideshowTimer = null;
  var overlayVisible = true, overlayTimeout = null, selectedSource = null, selectedAlbumId = null;
  var selectedPersonId = null, isRunning = false, refreshTimer = null, urlDriven = false;

  var $setupScreen = document.getElementById('setup-screen'), $slideshowScreen = document.getElementById('slideshow-screen');
  var $connectionStatus = document.getElementById('connection-status'), $setupContent = document.getElementById('setup-content');
  var $setupError = document.getElementById('setup-error'), $errorDetail = document.getElementById('error-detail');
  var $albumsList = document.getElementById('albums-list'), $btnStart = document.getElementById('btn-start');
  var $layerA = document.getElementById('photo-layer-a'), $layerB = document.getElementById('photo-layer-b');
  var $bgBlur = document.getElementById('bg-blur'), $clock = document.getElementById('clock');
  var $dateDisplay = document.getElementById('date-display'), $exifInfo = document.getElementById('exif-info');
  var $progressFill = document.getElementById('progress-fill'), $overlay = document.getElementById('overlay');
  var $btnSettings = document.getElementById('btn-settings'), $progressBar = document.getElementById('progress-bar');

  function getUrlParams() {
    var p = {}, s = window.location.search.substring(1); if (!s) return p;
    var pairs = s.split('&');
    for (var i = 0; i < pairs.length; i++) { var kv = pairs[i].split('='); p[decodeURIComponent(kv[0])] = decodeURIComponent(kv[1] || ''); }
    return p;
  }

  // --- Auto-launch helper: sets source and immediately starts slideshow ---
  async function autoLaunch(source, albumId, personId) {
    urlDriven = true;
    selectedSource = source;
    selectedAlbumId = albumId || null;
    selectedPersonId = personId || null;
    console.log('Frambe: auto-launching source=' + source + (albumId ? ' album=' + albumId : '') + (personId ? ' person=' + personId : ''));
    await doStartSlideshow();
  }

  async function init() {
    document.body.classList.add('setup-mode');
    try {
      config = await (await fetch('/api/config')).json();
      if (!config.connected) { showError('API key not configured. Set IMMICH_API_KEY in your environment.'); return; }
      var si = await (await fetch('/api/server-info')).json();
      if (!si.ok) { showError('Cannot reach Immich server: ' + si.error); return; }
      $connectionStatus.textContent = 'Connected to Immich v' + si.version.major + '.' + si.version.minor + '.' + si.version.patch;
      $connectionStatus.classList.add('connected');

      // Check URL parameters for direct launch (zero-touch)
      var params = getUrlParams();
      if (params.album) { await autoLaunch('album', params.album, null); return; }
      if (params.person) { await autoLaunch('person', null, params.person); return; }
      if ('favorites' in params) { await autoLaunch('favorites', null, null); return; }
      if ('random' in params) { await autoLaunch('random', null, null); return; }

      // Check env-based auto-start
      if (config.albumId) { await autoLaunch('album', config.albumId, null); return; }
      if (config.showFavoritesOnly) { await autoLaunch('favorites', null, null); return; }

      // No auto-start — show setup screen with album picker
      await loadAlbums();
    } catch (err) { showError('Failed to initialize: ' + err.message); }
  }

  function showError(msg) { $setupContent.style.display = 'none'; $setupError.style.display = 'block'; $errorDetail.textContent = msg; }

  async function loadAlbums() {
    try {
      var albums = await (await fetch('/api/albums')).json();
      if (!albums.length) { $albumsList.innerHTML = '<p class="loading-text">No albums found</p>'; return; }
      var html = '';
      for (var i = 0; i < albums.length; i++) {
        var a = albums[i], thu = a.albumThumbnailAssetId ? '/api/assets/' + a.albumThumbnailAssetId + '/thumbnail?size=thumbnail' : '';
        html += '<div class="album-item" data-id="' + a.id + '" onclick="selectAlbum(\'' + a.id + '\', this)">';
        html += thu ? '<img class="album-thumb" src="' + thu + '" alt="" loading="lazy">' : '<div class="album-thumb" style="display:flex;align-items:center;justify-content:center;font-size:1.2rem">📁</div>';
        html += '<div class="album-info"><div class="album-name">' + escapeHtml(a.albumName) + '</div><div class="album-count">' + a.assetCount + ' photos</div></div></div>';
      }
      $albumsList.innerHTML = html;
    } catch (e) { $albumsList.innerHTML = '<p class="loading-text">Failed to load albums</p>'; }
  }

  window.selectSource = function (src) {
    selectedSource = src; selectedAlbumId = null; selectedPersonId = null;
    document.getElementById('btn-all-photos').classList.toggle('selected', src === 'random');
    document.getElementById('btn-favorites').classList.toggle('selected', src === 'favorites');
    var items = document.querySelectorAll('.album-item');
    for (var i = 0; i < items.length; i++) items[i].classList.remove('selected');
    $btnStart.disabled = false;
  };
  window.selectAlbum = function (id, el) {
    selectedSource = 'album'; selectedAlbumId = id; selectedPersonId = null;
    document.getElementById('btn-all-photos').classList.remove('selected');
    document.getElementById('btn-favorites').classList.remove('selected');
    var items = document.querySelectorAll('.album-item');
    for (var i = 0; i < items.length; i++) items[i].classList.remove('selected');
    el.classList.add('selected'); $btnStart.disabled = false;
  };

  async function loadAssets() {
    var res;
    if (selectedSource === 'album' && selectedAlbumId) {
      res = await fetch('/api/albums/' + selectedAlbumId);
      if (!res.ok) throw new Error('Album fetch failed: ' + res.status);
      var al = await res.json();
      assets = al.assets || [];
    } else if (selectedSource === 'person' && selectedPersonId) {
      res = await fetch('/api/people/' + selectedPersonId);
      if (!res.ok) throw new Error('Person fetch failed: ' + res.status);
      assets = await res.json();
    } else if (selectedSource === 'favorites') {
      res = await fetch('/api/assets/favorites');
      if (!res.ok) throw new Error('Favorites fetch failed: ' + res.status);
      assets = await res.json();
    } else {
      res = await fetch('/api/assets/random?count=100');
      if (!res.ok) throw new Error('Random fetch failed: ' + res.status);
      assets = await res.json();
    }
    if (config.shuffle) shuffleArray(assets);
    console.log('Frambe: loaded ' + assets.length + ' photo(s) from ' + selectedSource);
  }

  function startRefreshTimer() {
    if (refreshTimer) clearInterval(refreshTimer);
    refreshTimer = setInterval(async function () {
      try {
        var oldIds = {}; for (var i = 0; i < assets.length; i++) oldIds[assets[i].id] = true;
        var nw, r;
        if (selectedSource === 'album' && selectedAlbumId) { r = await (await fetch('/api/albums/' + selectedAlbumId)).json(); nw = r.assets || []; }
        else if (selectedSource === 'person' && selectedPersonId) { nw = await (await fetch('/api/people/' + selectedPersonId)).json(); }
        else if (selectedSource === 'favorites') { nw = await (await fetch('/api/assets/favorites')).json(); }
        else return;
        var added = 0;
        for (var j = 0; j < nw.length; j++) { if (!oldIds[nw[j].id]) { assets.push(nw[j]); added++; } }
        if (added > 0) console.log('Frambe: added ' + added + ' new photo(s)');
      } catch (e) { console.warn('Frambe: refresh failed', e.message); }
    }, (config.refreshInterval || 300) * 1000);
  }

  // --- Core slideshow start (used by both button click and auto-launch) ---
  async function doStartSlideshow() {
    if (!selectedSource) return;
    $btnStart.disabled = true; $btnStart.innerHTML = '<span class="spinner"></span> Loading…';
    try {
      await loadAssets();
      if (!assets.length) {
        $btnStart.textContent = 'No photos found';
        setTimeout(function () { $btnStart.textContent = '▶ Start Slideshow'; $btnStart.disabled = false; }, 2000);
        return;
      }
      // Switch to slideshow view
      $setupScreen.style.display = 'none';
      $slideshowScreen.style.display = 'block';
      document.body.classList.remove('setup-mode');
      isRunning = true;
      var t = (config.transitionDuration || 2) * 1000;
      $layerA.style.transition = 'opacity ' + t + 'ms ease';
      $layerB.style.transition = 'opacity ' + t + 'ms ease';
      $bgBlur.style.transition = 'opacity ' + (t * 0.75) + 'ms ease';
      if (!config.showClock) $clock.style.display = 'none';
      if (!config.showDate) $dateDisplay.style.display = 'none';
      if (!config.showExif) $exifInfo.style.display = 'none';
      if (!config.showProgress) $progressBar.style.display = 'none';
      if (!config.backgroundBlur) $bgBlur.style.display = 'none';
      updateClock(); setInterval(updateClock, 1000);
      currentIndex = -1;
      showNextPhoto();
      scheduleOverlayHide();
      startRefreshTimer();
    } catch (err) {
      console.error('Frambe: slideshow start failed', err);
      $btnStart.textContent = 'Error: ' + err.message;
      setTimeout(function () { $btnStart.textContent = '▶ Start Slideshow'; $btnStart.disabled = false; }, 3000);
    }
  }

  // Exposed for the button onclick
  window.startSlideshow = function () { doStartSlideshow(); };

  window.exitSlideshow = function () {
    if (urlDriven) { window.location.href = window.location.pathname; return; }
    isRunning = false; clearTimeout(slideshowTimer); if (refreshTimer) clearInterval(refreshTimer);
    $slideshowScreen.style.display = 'none'; $setupScreen.style.display = 'flex'; document.body.classList.add('setup-mode');
    $btnStart.textContent = '▶ Start Slideshow'; $btnStart.disabled = false;
    $layerA.style.backgroundImage = ''; $layerB.style.backgroundImage = ''; $bgBlur.style.backgroundImage = '';
    $layerA.classList.add('active'); $layerB.classList.remove('active'); $bgBlur.classList.remove('visible'); activeLayer = 'a';
  };

  function showNextPhoto() { currentIndex++; if (currentIndex >= assets.length) { if (config.shuffle) shuffleArray(assets); currentIndex = 0; } showPhoto(currentIndex); }
  function showPrevPhoto() { currentIndex--; if (currentIndex < 0) currentIndex = assets.length - 1; showPhoto(currentIndex); }
  function showPhoto(idx) {
    if (!assets[idx]) return; clearTimeout(slideshowTimer);
    var a = assets[idx], url = '/api/assets/' + a.id + '/thumbnail?size=preview';
    var img = new Image(); img.onload = function () { displayImage(url, a); }; img.onerror = function () { setTimeout(showNextPhoto, 500); }; img.src = url;
    preloadNext(idx + 1);
  }
  function displayImage(url, asset) {
    var fit = config.imageFit || 'contain', inc, out;
    if (activeLayer === 'a') { inc = $layerB; out = $layerA; activeLayer = 'b'; } else { inc = $layerA; out = $layerB; activeLayer = 'a'; }
    inc.style.backgroundImage = 'url(' + url + ')'; inc.style.backgroundSize = fit;
    inc.classList.add('active'); out.classList.remove('active');
    if (config.backgroundBlur) { $bgBlur.style.backgroundImage = 'url(' + url + ')'; $bgBlur.classList.add('visible'); }
    updateExifInfo(asset); startProgress();
    slideshowTimer = setTimeout(showNextPhoto, (config.slideshowInterval || 30) * 1000);
  }
  function preloadNext(i) { if (i >= assets.length) i = 0; if (!assets[i]) return; var img = new Image(); img.src = '/api/assets/' + assets[i].id + '/thumbnail?size=preview'; }
  function updateExifInfo(a) {
    if (!config.showExif || !a.exifInfo) { $exifInfo.textContent = ''; return; }
    var p = [], e = a.exifInfo, loc = [e.city, e.state, e.country].filter(Boolean).join(', ');
    if (loc) p.push('📍 ' + loc);
    if (e.dateTimeOriginal) p.push(formatDate(new Date(e.dateTimeOriginal)));
    else if (a.fileCreatedAt) p.push(formatDate(new Date(a.fileCreatedAt)));
    if (e.make || e.model) p.push('📷 ' + [e.make, e.model].filter(Boolean).join(' '));
    $exifInfo.textContent = p.join('  •  ');
  }
  function startProgress() {
    if (!config.showProgress) return;
    $progressFill.style.transition = 'none'; $progressFill.style.width = '0%'; $progressFill.offsetWidth;
    $progressFill.style.transition = 'width ' + ((config.slideshowInterval || 30) * 1000) + 'ms linear'; $progressFill.style.width = '100%';
  }
  function updateClock() {
    var n = new Date();
    if (config.showClock) $clock.textContent = padZero(n.getHours()) + ':' + padZero(n.getMinutes());
    if (config.showDate) $dateDisplay.textContent = n.toLocaleDateString(undefined, { weekday: 'long', day: 'numeric', month: 'long', year: 'numeric' });
  }
  window.toggleOverlay = function () { overlayVisible = !overlayVisible; if (overlayVisible) { $overlay.classList.remove('hidden'); $btnSettings.classList.add('visible'); scheduleOverlayHide(); } else { $overlay.classList.add('hidden'); $btnSettings.classList.remove('visible'); } };
  function scheduleOverlayHide() { clearTimeout(overlayTimeout); overlayTimeout = setTimeout(function () { $overlay.classList.add('hidden'); $btnSettings.classList.remove('visible'); overlayVisible = false; }, 8000); }
  window.nextPhoto = function () { showNextPhoto(); if (overlayVisible) scheduleOverlayHide(); };
  window.prevPhoto = function () { showPrevPhoto(); if (overlayVisible) scheduleOverlayHide(); };
  document.addEventListener('keydown', function (e) { if (!isRunning) return; switch (e.key) { case 'ArrowRight': case ' ': e.preventDefault(); nextPhoto(); break; case 'ArrowLeft': e.preventDefault(); prevPhoto(); break; case 'Escape': exitSlideshow(); break; case 'f': toggleFullscreen(); break; case 'i': toggleOverlay(); break; } });
  function toggleFullscreen() { if (!document.fullscreenElement && !document.webkitFullscreenElement) { var el = document.documentElement; if (el.requestFullscreen) el.requestFullscreen(); else if (el.webkitRequestFullscreen) el.webkitRequestFullscreen(); } else { if (document.exitFullscreen) document.exitFullscreen(); else if (document.webkitExitFullscreen) document.webkitExitFullscreen(); } }
  function shuffleArray(arr) { for (var i = arr.length - 1; i > 0; i--) { var j = Math.floor(Math.random() * (i + 1)); var t = arr[i]; arr[i] = arr[j]; arr[j] = t; } }
  function padZero(n) { return n < 10 ? '0' + n : '' + n; }
  function formatDate(d) { var m = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']; return d.getDate() + ' ' + m[d.getMonth()] + ' ' + d.getFullYear(); }
  function escapeHtml(s) { var d = document.createElement('div'); d.appendChild(document.createTextNode(s)); return d.innerHTML; }
  async function requestWakeLock() { try { if ('wakeLock' in navigator) await navigator.wakeLock.request('screen'); } catch (e) {} }
  document.addEventListener('visibilitychange', function () { if (document.visibilityState === 'visible' && isRunning) requestWakeLock(); });
  function preventSleep() { try { var v = document.createElement('video'); v.setAttribute('playsinline',''); v.setAttribute('muted',''); v.setAttribute('loop',''); v.style.cssText = 'position:absolute;width:1px;height:1px;opacity:0.01'; v.src = 'data:video/mp4;base64,AAAAIGZ0eXBpc29tAAACAGlzb21pc28yYXZjMW1wNDEAAAAIZnJlZQAAAAhtZGF0AAAA1m1vb3YAAABsbXZoZAAAAAAAAAAAAAAAAAAAA+gAAAAAAAEAAAEAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAAYdHJhawAAAFx0a2hkAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAJBtZGlhAAAAIG1kaGQAAAAAAAAAAAAAAAAAADIAAAAAAAAhhdmMxAAAAAAAAAAAAAAAAAAAAAAAA'; document.body.appendChild(v); v.play().catch(function(){}); } catch(e){} }
  init(); requestWakeLock(); preventSleep();
})();