// MusicRoom - Init module
// Application initialization sequence

(function() {
  const M = window.MusicRoom;
  
  // Check for /listen/<trackId> URL
  function checkDirectTrackLink() {
    const match = location.pathname.match(/^\/listen\/(.+)$/);
    if (match) {
      const trackId = decodeURIComponent(match[1]);
      console.log("[Init] Direct track link detected:", trackId);
      return trackId;
    }
    return null;
  }
  
  // Play a specific track in local/desync mode
  M.playDirectTrack = async function(trackId) {
    // Find track in library
    const track = M.library?.find(t => t.id === trackId);
    if (!track) {
      M.showToast("Track not found", "error");
      // Clear the URL
      history.replaceState(null, "", "/");
      return;
    }
    
    // Desync from server
    M.wantSync = false;
    M.synced = false;
    if (M.ws) {
      M.ws.close();
      M.ws = null;
    }
    
    // Set up and play track
    M.currentTrackId = trackId;
    M.serverTrackDuration = track.duration;
    M.setTrackTitle(track.title || track.filename);
    M.loadingSegments.clear();
    
    const cachedUrl = await M.loadTrackBlob(trackId);
    M.audio.src = cachedUrl || M.getTrackUrl(trackId);
    M.audio.currentTime = 0;
    M.localTimestamp = 0;
    M.audio.play().catch(() => {
      M.showToast("Click to start playback");
    });
    
    M.updateUI();
    M.showToast(`Playing: ${track.title || track.filename}`);
    
    // Clear the URL to normal
    history.replaceState(null, "", "/");
  };
  
  // Fetch server status/config
  async function loadServerStatus() {
    try {
      const res = await fetch("/api/status");
      M.serverStatus = await res.json();
      console.log("Server status:", M.serverStatus);
    } catch (e) {
      console.warn("Failed to load server status");
      M.serverStatus = null;
    }
  }
  
  // Initialize track storage
  async function initStorage() {
    await TrackStorage.init();
    await M.updateCacheStatus();
    console.log(`TrackStorage: ${M.cachedTracks.size} tracks cached`);
  }
  
  // Setup panel tab switching
  function initPanelTabs() {
    const tabs = document.querySelectorAll(".panel-tab");
    tabs.forEach(tab => {
      tab.onclick = () => {
        const tabId = tab.dataset.tab;
        const panel = tab.closest("#library-panel, #queue-panel");
        if (!panel) return;
        
        // Update active tab
        panel.querySelectorAll(".panel-tab").forEach(t => t.classList.remove("active"));
        tab.classList.add("active");
        
        // Update active view
        panel.querySelectorAll(".panel-view").forEach(v => v.classList.remove("active"));
        const view = panel.querySelector(`#${tabId}-view`);
        if (view) view.classList.add("active");
      };
    });
  }
  
  // Setup history panel handlers
  document.addEventListener("DOMContentLoaded", () => {
    const btnHistory = M.$("#btn-history");
    const btnClose = M.$("#btn-close-history");
    
    if (btnHistory) {
      btnHistory.onclick = () => M.toggleToastHistory();
    }
    if (btnClose) {
      btnClose.onclick = () => M.toggleToastHistory();
    }
    
    initPanelTabs();
    
    // Initialize playlists
    if (M.playlists?.init) {
      M.playlists.init();
    }
  });
  
  // Update UI based on server status
  function updateFeatureVisibility() {
    const fetchBtn = M.$("#btn-fetch-url");
    if (fetchBtn) {
      const ytdlpEnabled = M.serverStatus?.ytdlp?.enabled && M.serverStatus?.ytdlp?.available;
      fetchBtn.style.display = ytdlpEnabled ? "" : "none";
    }
  }
  
  // Initialize the application
  const directTrackId = checkDirectTrackLink();
  
  Promise.all([initStorage(), loadServerStatus()]).then(async () => {
    updateFeatureVisibility();
    await M.loadLibrary();
    await M.loadCurrentUser();
    if (M.currentUser) {
      M.loadChannels();
      // Load playlists after auth
      if (M.playlists?.load) {
        M.playlists.load();
      }
    }
    
    // Handle direct track link after everything is loaded
    if (directTrackId) {
      // Small delay to ensure UI is ready
      setTimeout(() => M.playDirectTrack(directTrackId), 500);
    }
  });
})();