'use client';
import React, { createContext, useContext, useEffect, useState, ReactNode } from 'react';
import { getNavidromeAPI, Album, Artist, Song, Playlist, AlbumInfo, ArtistInfo } from '@/lib/navidrome';
import { useCallback } from 'react';

interface NavidromeContextType {
  // API instance
  api: ReturnType<typeof getNavidromeAPI>;
  
  // Data
  albums: Album[];
  artists: Artist[];
  playlists: Playlist[];
  
  // Loading states
  isLoading: boolean;
  albumsLoading: boolean;
  artistsLoading: boolean;
  playlistsLoading: boolean;
  
  // Connection state
  isConnected: boolean;
  
  // Error states
  error: string | null;
  
  // Methods
  searchMusic: (query: string) => Promise<{ artists: Artist[]; albums: Album[]; songs: Song[] }>;
  search2: (query: string) => Promise<{ artists: Artist[]; albums: Album[]; songs: Song[] }>;
  getAlbum: (albumId: string) => Promise<{ album: Album; songs: Song[] }>;
  getArtist: (artistId: string) => Promise<{ artist: Artist; albums: Album[] }>;
  getArtistInfo2: (artistId: string) => Promise<ArtistInfo>;
  getAlbumInfo2: (albumId: string) => Promise<AlbumInfo>;
  getPlaylist: (playlistId: string) => Promise<{ playlist: Playlist; songs: Song[] }>;
  getAllSongs: () => Promise<Song[]>;
  refreshData: () => Promise<void>;
  createPlaylist: (name: string, songIds?: string[]) => Promise<Playlist>;
  updatePlaylist: (playlistId: string, name?: string, comment?: string, songIds?: string[]) => Promise<void>;
  deletePlaylist: (playlistId: string) => Promise<void>;
  starItem: (id: string, type: 'song' | 'album' | 'artist') => Promise<void>;
  unstarItem: (id: string, type: 'song' | 'album' | 'artist') => Promise<void>;
  scrobble: (songId: string) => Promise<void>;
}

const NavidromeContext = createContext<NavidromeContextType | undefined>(undefined);

interface NavidromeProviderProps {
  children: ReactNode;
}

export const NavidromeProvider: React.FC<NavidromeProviderProps> = ({ children }) => {
  const [albums, setAlbums] = useState<Album[]>([]);
  const [artists, setArtists] = useState<Artist[]>([]);
  const [playlists, setPlaylists] = useState<Playlist[]>([]);
  
  const [albumsLoading, setAlbumsLoading] = useState(false);
  const [artistsLoading, setArtistsLoading] = useState(false);
  const [playlistsLoading, setPlaylistsLoading] = useState(false);
  
  const [error, setError] = useState<string | null>(null);
  const [isConnected, setIsConnected] = useState(false);

  const isLoading = albumsLoading || artistsLoading || playlistsLoading;

  const api = getNavidromeAPI();

  const loadAlbums = useCallback(async () => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      setAlbumsLoading(false);
      return;
    }
    
    setAlbumsLoading(true);
    setError(null);
    try {
      const recentAlbums = await api.getAlbums('recent', 50);
      const newestAlbums = await api.getAlbums('newest', 50);
      
      // Combine and deduplicate albums
      const allAlbums = [...recentAlbums, ...newestAlbums];
      const uniqueAlbums = allAlbums.filter((album, index, self) =>
        index === self.findIndex(a => a.id === album.id)
      );
      
      setAlbums(uniqueAlbums);
    } catch (err) {
      console.error('Failed to load albums:', err);
      setError('Failed to load albums');
    } finally {
      setAlbumsLoading(false);
    }
  }, [api]);

  const loadArtists = useCallback(async () => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      setArtistsLoading(false);
      return;
    }
    
    setArtistsLoading(true);
    setError(null);
    try {
      const artistList = await api.getArtists();
      setArtists(artistList);
    } catch (err) {
      console.error('Failed to load artists:', err);
      setError('Failed to load artists');
    } finally {
      setArtistsLoading(false);
    }
  }, [api]);

  const loadPlaylists = useCallback(async () => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      setPlaylistsLoading(false);
      return;
    }
    
    setPlaylistsLoading(true);
    setError(null);
    try {
      const playlistList = await api.getPlaylists();
      setPlaylists(playlistList);
    } catch (err) {
      console.error('Failed to load playlists:', err);
      setError('Failed to load playlists');
    } finally {
      setPlaylistsLoading(false);
    }
  }, [api]);

  const refreshData = useCallback(async () => {
    await Promise.all([loadAlbums(), loadArtists(), loadPlaylists()]);
  }, [loadAlbums, loadArtists, loadPlaylists]);

  const searchMusic = async (query: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      return { artists: [], albums: [], songs: [] };
    }
    
    setError(null);
    try {
      return await api.search(query);
    } catch (err) {
      console.error('Search failed:', err);
      setError('Search failed');
      return { artists: [], albums: [], songs: [] };
    }
  };

  const search2 = async (query: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      return { artists: [], albums: [], songs: [] };
    }
    
    setError(null);
    try {
      return await api.search2(query);
    } catch (err) {
      console.error('Search2 failed:', err);
      setError('Search failed');
      return { artists: [], albums: [], songs: [] };
    }
  };

  const getAlbum = async (albumId: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      return await api.getAlbum(albumId);
    } catch (err) {
      console.error('Failed to get album:', err);
      setError('Failed to get album');
      throw err;
    }
  };

  const getArtist = async (artistId: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      return await api.getArtist(artistId);
    } catch (err) {
      console.error('Failed to get artist:', err);
      setError('Failed to get artist');
      throw err;
    }
  };

  const getArtistInfo2 = async (artistId: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      return await api.getArtistInfo2(artistId);
    } catch (err) {
      console.error('Failed to get artist info:', err);
      setError('Failed to get artist info');
      throw err;
    }
  };

  const getAlbumInfo2 = async (albumId: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      return await api.getAlbumInfo2(albumId);
    } catch (err) {
      console.error('Failed to get album info:', err);
      setError('Failed to get album info');
      throw err;
    }
  };

  const getPlaylist = async (playlistId: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      return await api.getPlaylist(playlistId);
    } catch (err) {
      console.error('Failed to get playlist:', err);
      setError('Failed to get playlist');
      throw err;
    }
  };

  const getAllSongs = async () => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      return await api.getAllSongs();
    } catch (err) {
      console.error('Failed to get all songs:', err);
      setError('Failed to get all songs');
      throw err;
    }
  };

  const createPlaylist = async (name: string, songIds?: string[]) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      const playlist = await api.createPlaylist(name, songIds);
      await loadPlaylists(); // Refresh playlists
      return playlist;
    } catch (err) {
      console.error('Failed to create playlist:', err);
      setError('Failed to create playlist');
      throw err;
    }
  };

  const updatePlaylist = async (playlistId: string, name?: string, comment?: string, songIds?: string[]) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      await api.updatePlaylist(playlistId, name, comment, songIds);
      await loadPlaylists(); // Refresh playlists
    } catch (err) {
      console.error('Failed to update playlist:', err);
      setError('Failed to update playlist');
      throw err;
    }
  };

  const deletePlaylist = async (playlistId: string) => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      await api.deletePlaylist(playlistId);
      await loadPlaylists(); // Refresh playlists
    } catch (err) {
      console.error('Failed to delete playlist:', err);
      setError('Failed to delete playlist');
      throw err;
    }
  };

  const starItem = async (id: string, type: 'song' | 'album' | 'artist') => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      await api.star(id, type);
    } catch (err) {
      console.error('Failed to star item:', err);
      setError('Failed to star item');
      throw err;
    }
  };

  const unstarItem = async (id: string, type: 'song' | 'album' | 'artist') => {
    if (!api) {
      setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
      throw new Error('Navidrome is not configured');
    }
    
    setError(null);
    try {
      await api.unstar(id, type);
    } catch (err) {
      console.error('Failed to unstar item:', err);
      setError('Failed to unstar item');
      throw err;
    }
  };

  const scrobble = async (songId: string) => {
    if (!api) {
      console.log('Navidrome is not configured. Skipping scrobble.');
      return;
    }
    
    try {
      await api.scrobble(songId);
    } catch (err) {
      console.error('Failed to scrobble:', err);
      // Don't set error state for scrobbling failures as they're not critical
    }
  };

  useEffect(() => {
    // Test connection and load initial data
    const initialize = async () => {
      if (!api) {
        setIsConnected(false);
        setError('Navidrome is not configured. Please go to Settings to configure your Navidrome server.');
        return;
      }
      
      try {
        const connected = await api.ping();
        setIsConnected(connected);
        if (connected) {
          await refreshData();
        } else {
          setError('Failed to connect to Navidrome server');
        }
      } catch (err) {
        console.error('Failed to initialize Navidrome:', err);
        setError('Failed to initialize Navidrome connection');
        setIsConnected(false);
      }
    };

    initialize();
  }, [api, refreshData]);

  const value: NavidromeContextType = {
    // API instance
    api,
    
    // Data
    albums,
    artists,
    playlists,
    
    // Loading states
    isLoading,
    albumsLoading,
    artistsLoading,
    playlistsLoading,
    
    // Connection state
    isConnected,
    
    // Error state
    error,
    
    // Methods
    searchMusic,
    search2,
    getAlbum,
    getArtist,
    getArtistInfo2,
    getAlbumInfo2,
    getPlaylist,
    getAllSongs,
    refreshData,
    createPlaylist,
    updatePlaylist,
    deletePlaylist,
    starItem,
    unstarItem,
    scrobble
  };

  return (
    <NavidromeContext.Provider value={value}>
      {children}
    </NavidromeContext.Provider>
  );
};

export const useNavidrome = (): NavidromeContextType => {
  const context = useContext(NavidromeContext);
  if (context === undefined) {
    throw new Error('useNavidrome must be used within a NavidromeProvider');
  }
  return context;
};