import 'package:connectivity_plus/connectivity_plus.dart';
import 'package:flutter/material.dart';
import 'package:fluttericon/font_awesome5_icons.dart';
import 'package:freezer/api/cache.dart';
import 'package:freezer/api/deezer.dart';
import 'package:freezer/api/definitions.dart';
import 'package:freezer/api/importer.dart';
import 'package:freezer/api/player/audio_handler.dart';
import 'package:freezer/settings.dart';
import 'package:freezer/ui/details_screens.dart';
import 'package:freezer/ui/elements.dart';
import 'package:freezer/ui/error.dart';
import 'package:freezer/ui/importer_screen.dart';
import 'package:freezer/ui/tiles.dart';
import 'package:freezer/translations.i18n.dart';

import 'menu.dart';
import '../api/download.dart';

class LibraryAppBar extends StatelessWidget implements PreferredSizeWidget {
  const LibraryAppBar({super.key});

  @override
  Size get preferredSize => AppBar().preferredSize;

  @override
  Widget build(BuildContext context) {
    return AppBar(
      title: Text('Library'.i18n),
      actions: <Widget>[
        IconButton(
          icon: Icon(
            Icons.file_download,
            semanticLabel: "Download".i18n,
          ),
          onPressed: () => Navigator.pushNamed(context, '/downloads'),
        ),
        IconButton(
          icon: Icon(
            Icons.settings,
            semanticLabel: "Settings".i18n,
          ),
          onPressed: () => Navigator.pushNamed(context, '/settings'),
        ),
      ],
    );
  }
}

class LibraryScreen extends StatelessWidget {
  const LibraryScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const LibraryAppBar(),
      body: ListView(
        children: <Widget>[
          const SizedBox(height: 4.0),
          if (!downloadManager.running && downloadManager.queueSize! > 0)
            ListTile(
              title: Text('Downloads'.i18n),
              leading:
                  const LeadingIcon(Icons.file_download, color: Colors.grey),
              subtitle: Text(
                  'Downloading is currently stopped, click here to resume.'
                      .i18n),
              onTap: () {
                downloadManager.start();
                Navigator.pushNamed(context, '/downloads');
              },
            ),
          ListTile(
            title: Text('Shuffle'.i18n),
            leading: const LeadingIcon(Icons.shuffle, color: Color(0xffeca704)),
            onTap: () async {
              List<Track> tracks = (await deezerAPI.libraryShuffle())!;
              playerHelper.playFromTrackList(
                  tracks,
                  tracks[0].id,
                  QueueSource(
                      id: 'libraryshuffle',
                      source: 'libraryshuffle',
                      text: 'Library shuffle'.i18n));
            },
          ),
          const FreezerDivider(),
          ListTile(
            title: Text('Tracks'.i18n),
            leading:
                const LeadingIcon(Icons.audiotrack, color: Color(0xffbe3266)),
            onTap: () => Navigator.pushNamed(context, '/library/tracks'),
          ),
          ListTile(
            title: Text('Albums'.i18n),
            leading: const LeadingIcon(Icons.album, color: Color(0xff4b2e7e)),
            onTap: () => Navigator.pushNamed(context, '/library/albums'),
          ),
          ListTile(
            title: Text('Artists'.i18n),
            leading: const LeadingIcon(Icons.recent_actors,
                color: Color(0xff384697)),
            onTap: () => Navigator.pushNamed(context, '/library/artists'),
          ),
          ListTile(
            title: Text('Playlists'.i18n),
            leading: const LeadingIcon(Icons.playlist_play,
                color: Color(0xff0880b5)),
            onTap: () => Navigator.pushNamed(context, '/library/playlists'),
          ),
          const FreezerDivider(),
          ListTile(
            title: Text('History'.i18n),
            leading: const LeadingIcon(Icons.history, color: Color(0xff009a85)),
            onTap: () => Navigator.pushNamed(context, '/library/history'),
          ),
          const FreezerDivider(),
          ListTile(
            title: Text('Import'.i18n),
            leading: const LeadingIcon(Icons.import_export,
                color: Color(0xff2ba766)),
            subtitle: Text('Import playlists from Spotify'.i18n),
            onTap: () {
              //Show progress
              if (importer.done || importer.busy) {
                Navigator.of(context).pushRoute(
                    builder: (context) => const ImporterStatusScreen());
                return;
              }

              Navigator.of(context).pushNamed('/spotify-importer');

              //Pick importer dialog (removed as ImporterV1 is broken)
              // showDialog(
              //     context: context,
              //     builder: (context) => SimpleDialog(
              //           title: Text('Importer'.i18n),
              //           children: [
              //             ListTile(
              //               leading: const Icon(FontAwesome5.spotify),
              //               title: Text('Spotify v1'.i18n),
              //               subtitle: Text(
              //                   'Import Spotify playlists up to 100 tracks without any login.'
              //                       .i18n),
              //               onTap: () {
              //                 Navigator.of(context).pop();
              //                 Navigator.of(context).pushRoute(
              //                     builder: (context) =>
              //                         const SpotifyImporterV1());
              //               },
              //             ),
              //             ListTile(
              //               leading: const Icon(FontAwesome5.spotify),
              //               title: Text('Spotify v2'.i18n),
              //               subtitle: Text(
              //                   'Import any Spotify playlist, import from own Spotify library. Requires free account.'
              //                       .i18n),
              //               onTap: () {
              //                 Navigator.of(context).pop();
              //                 Navigator.of(context).pushRoute(
              //                     builder: (context) =>
              //                         const SpotifyImporterV2());
              //               },
              //             )
              //           ],
              //         ));
            },
          ),
          if (DownloadManager.isSupported)
            ExpansionTile(
              title: Text('Statistics'.i18n),
              leading:
                  const LeadingIcon(Icons.insert_chart, color: Colors.grey),
              children: <Widget>[
                FutureBuilder(
                  future: downloadManager.getStats(),
                  builder: (context, snapshot) {
                    if (snapshot.hasError) return const ErrorScreen();
                    if (!snapshot.hasData) {
                      return const Padding(
                        padding: EdgeInsets.symmetric(vertical: 4.0),
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: <Widget>[CircularProgressIndicator()],
                        ),
                      );
                    }
                    List<String> data = snapshot.data!;
                    return Column(
                      children: <Widget>[
                        ListTile(
                          title: Text('Offline tracks'.i18n),
                          leading: const Icon(Icons.audiotrack),
                          trailing: Text(data[0]),
                        ),
                        ListTile(
                          title: Text('Offline albums'.i18n),
                          leading: const Icon(Icons.album),
                          trailing: Text(data[1]),
                        ),
                        ListTile(
                          title: Text('Offline playlists'.i18n),
                          leading: const Icon(Icons.playlist_add),
                          trailing: Text(data[2]),
                        ),
                        ListTile(
                          title: Text('Offline size'.i18n),
                          leading: const Icon(Icons.sd_card),
                          trailing: Text(data[3]),
                        ),
                        ListTile(
                          title: Text('Free space'.i18n),
                          leading: const Icon(Icons.disc_full),
                          trailing: Text(data[4]),
                        ),
                      ],
                    );
                  },
                )
              ],
            )
        ],
      ),
    );
  }
}

class LibraryTracks extends StatefulWidget {
  const LibraryTracks({super.key});

  @override
  State<LibraryTracks> createState() => _LibraryTracksState();
}

class _LibraryTracksState extends State<LibraryTracks> {
  bool _loading = false;
  bool _loadingTracks = false;
  final ScrollController _scrollController = ScrollController();
  List<Track> tracks = [];
  List<Track> allTracks = [];
  int? trackCount;
  Sorting? _sort = Sorting(sourceType: SortSourceTypes.TRACKS);

  Playlist get _playlist => Playlist(id: deezerAPI.favoritesPlaylistId!);

  List<Track> get _sorted {
    List<Track> tcopy = List.from(tracks);
    tcopy.sort((a, b) => a.addedDate!.compareTo(b.addedDate!));
    switch (_sort!.type) {
      case SortType.ALPHABETIC:
        tcopy.sort((a, b) => a.title!.compareTo(b.title!));
        break;
      case SortType.ARTIST:
        tcopy.sort((a, b) => a.artists![0].name!
            .toLowerCase()
            .compareTo(b.artists![0].name!.toLowerCase()));
        break;
      case SortType.DEFAULT:
      default:
        break;
    }
    //Reverse
    if (_sort!.reverse!) return tcopy.reversed.toList();
    return tcopy;
  }

  Future _reverse() async {
    setState(() => _sort!.reverse = !_sort!.reverse!);
    //Save sorting in cache
    int? index = Sorting.index(SortSourceTypes.TRACKS);
    if (index != null) {
      cache.sorts[index] = _sort;
    } else {
      cache.sorts.add(_sort);
    }
    await cache.save();

    //Preload for sorting
    if (tracks.length < (trackCount ?? 0)) _loadFull();
  }

  Future _load() async {
    //Already loaded
    if (trackCount != null && tracks.length >= trackCount!) {
      //Update tracks cache if fully loaded
      if (cache.libraryTracks.length != trackCount) {
        cache.libraryTracks = tracks.map((t) => t.id).toList();
        await cache.save();
      }
      return;
    }

    ConnectivityResult connectivity = await Connectivity().checkConnectivity();
    if (connectivity != ConnectivityResult.none) {
      setState(() => _loading = true);
      int pos = tracks.length;

      if (trackCount == null || tracks.isEmpty) {
        //Load tracks as a playlist
        Playlist? favPlaylist;
        try {
          favPlaylist = await deezerAPI.playlist(deezerAPI.favoritesPlaylistId);
        } catch (e) {}
        //Error loading
        if (favPlaylist == null) {
          setState(() => _loading = false);
          return;
        }
        //Update
        if (mounted) {
          setState(() {
            trackCount = favPlaylist!.trackCount;
            if (tracks.isEmpty && favPlaylist.tracks != null) {
              tracks = favPlaylist.tracks!;
            }
            _makeFavorite();
            _loading = false;
          });
        }
        return;
      }

      //Load another page of tracks from deezer
      if (_loadingTracks) return;
      _loadingTracks = true;

      List<Track>? t;
      try {
        t = await deezerAPI.playlistTracksPage(
            deezerAPI.favoritesPlaylistId, pos);
      } catch (e) {}
      //On error load offline
      if (t == null) {
        await _loadOffline();
        return;
      }
      setState(() {
        tracks.addAll(t!);
        _makeFavorite();
        _loading = false;
        _loadingTracks = false;
      });
    }
  }

  //Load all tracks
  Future _loadFull() async {
    if (tracks.isEmpty || tracks.length < (trackCount ?? 0)) {
      Playlist? p;
      try {
        p = await deezerAPI.fullPlaylist(deezerAPI.favoritesPlaylistId);
      } catch (e) {}
      if (p != null) {
        setState(() {
          tracks.addAll(p!.tracks!);
          trackCount = p.trackCount;
          _sort = _sort;
        });

        if (cache.libraryTracks.length != trackCount) {
          cache.libraryTracks = tracks.map((t) => t.id).toList();
          await cache.save();
        }
      }
    }
  }

  Future<void> _loadOffline() async {
    if (deezerAPI.favoritesPlaylistId == null) return;
    Playlist? p =
        await downloadManager.getPlaylistFromId(deezerAPI.favoritesPlaylistId!);
    if (p != null) {
      setState(() {
        tracks.addAll(p.tracks!);
      });
    }
  }

  Future _loadAllOffline() async {
    List<Track> tracks = await downloadManager.allOfflineTracks();
    setState(() {
      allTracks = tracks;
    });
  }

  //Update tracks with favorite true
  void _makeFavorite() {
    for (int i = 0; i < tracks.length; i++) {
      tracks[i].favorite = true;
    }
  }

  @override
  void initState() {
    _scrollController.addListener(() {
      //Load more tracks on scroll
      double off = _scrollController.position.maxScrollExtent * 0.90;
      if (_scrollController.position.pixels > off) _load();
    });

    _load();
    //Load all offline tracks
    _loadAllOffline();

    //Load sorting
    int? index = Sorting.index(SortSourceTypes.TRACKS);
    if (index != null) setState(() => _sort = cache.sorts[index]);

    if (_sort!.type != SortType.DEFAULT || _sort!.reverse!) _loadFull();

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Tracks'.i18n),
          actions: [
            IconButton(
                icon: Icon(
                  _sort!.reverse!
                      ? FontAwesome5.sort_alpha_up
                      : FontAwesome5.sort_alpha_down,
                  semanticLabel: _sort!.reverse!
                      ? "Sort descending".i18n
                      : "Sort ascending".i18n,
                ),
                onPressed: () async {
                  await _reverse();
                }),
            PopupMenuButton(
              color: Theme.of(context).scaffoldBackgroundColor,
              onSelected: (SortType s) async {
                //Preload for sorting
                if (tracks.length < (trackCount ?? 0)) await _loadFull();

                setState(() => _sort!.type = s);
                //Save sorting in cache
                int? index = Sorting.index(SortSourceTypes.TRACKS);
                if (index != null) {
                  cache.sorts[index] = _sort;
                } else {
                  cache.sorts.add(_sort);
                }
                await cache.save();
              },
              itemBuilder: (context) => <PopupMenuEntry<SortType>>[
                PopupMenuItem(
                  value: SortType.DEFAULT,
                  child: Text('Default'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.ALPHABETIC,
                  child: Text('Alphabetic'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.ARTIST,
                  child: Text('Artist'.i18n, style: popupMenuTextStyle()),
                ),
              ],
              child: Icon(
                Icons.sort,
                size: 32.0,
                semanticLabel: "Sort".i18n,
              ),
            ),
            const SizedBox(width: 8.0),
          ],
        ),
        body: _loading && allTracks.isEmpty
            ? const Center(child: CircularProgressIndicator())
            : Scrollbar(
                interactive: true,
                controller: _scrollController,
                thickness: 8.0,
                child: ListView(
                  controller: _scrollController,
                  children: <Widget>[
                    if (!_loading)
                      Row(
                          mainAxisAlignment: MainAxisAlignment.spaceAround,
                          children: <Widget>[
                            MakePlaylistOffline(_playlist),
                            TextButton.icon(
                              icon: const Icon(Icons.file_download),
                              label: Text('Download'.i18n),
                              onPressed: () async {
                                if (await downloadManager.addOfflinePlaylist(
                                        _playlist,
                                        private: false,
                                        context: context) !=
                                    false) {
                                  MenuSheet(context).showDownloadStartedToast();
                                }
                              },
                            )
                          ]),
                    const FreezerDivider(),
                    //Loved tracks
                    if (_loading)
                      const Center(child: CircularProgressIndicator()),
                    ...List.generate(tracks.length, (i) {
                      Track? t = (tracks.length == (trackCount ?? 0))
                          ? _sorted[i]
                          : tracks[i];
                      return TrackTile.fromTrack(
                        t,
                        onTap: () {
                          playerHelper.playFromTrackList(
                              (tracks.length == (trackCount ?? 0))
                                  ? _sorted
                                  : tracks,
                              t.id,
                              QueueSource(
                                  id: deezerAPI.favoritesPlaylistId,
                                  text: 'Favorites'.i18n,
                                  source: 'playlist'));
                        },
                        onSecondary: (details) {
                          MenuSheet m = MenuSheet(context);
                          m.defaultTrackMenu(t, details: details, onRemove: () {
                            setState(() {
                              tracks.removeWhere((track) => t.id == track.id);
                            });
                          });
                        },
                      );
                    }),
                    const FreezerDivider(),
                    Text(
                      'All offline tracks'.i18n,
                      textAlign: TextAlign.center,
                      style: const TextStyle(
                          fontSize: 24, fontWeight: FontWeight.bold),
                    ),
                    const SizedBox(height: 8.0),
                    for (final track in allTracks)
                      TrackTile.fromTrack(track!, onTap: () {
                        playerHelper.playFromTrackList(
                            allTracks,
                            track.id,
                            QueueSource(
                                id: 'allTracks',
                                text: 'All offline tracks'.i18n,
                                source: 'offline'));
                      }, onSecondary: (details) {
                        MenuSheet(context)
                            .defaultTrackMenu(track, details: details);
                      }),
                  ],
                )));
  }
}

class LibraryAlbums extends StatefulWidget {
  const LibraryAlbums({super.key});

  @override
  State<LibraryAlbums> createState() => _LibraryAlbumsState();
}

class _LibraryAlbumsState extends State<LibraryAlbums> {
  List<Album>? _albums;
  Sorting? _sort = Sorting(sourceType: SortSourceTypes.ALBUMS);
  final ScrollController _scrollController = ScrollController();

  List<Album> get _sorted {
    List<Album> albums = List.from(_albums!);
    albums.sort((a, b) => a.favoriteDate!.compareTo(b.favoriteDate!));
    switch (_sort!.type) {
      case SortType.DEFAULT:
        break;
      case SortType.ALPHABETIC:
        albums.sort(
            (a, b) => a.title!.toLowerCase().compareTo(b.title!.toLowerCase()));
        break;
      case SortType.ARTIST:
        albums.sort((a, b) => a.artists![0].name!
            .toLowerCase()
            .compareTo(b.artists![0].name!.toLowerCase()));
        break;
      case SortType.RELEASE_DATE:
        albums.sort((a, b) => DateTime.parse(a.releaseDate!)
            .compareTo(DateTime.parse(b.releaseDate!)));
        break;
      default:
        break;
    }
    //Reverse
    if (_sort!.reverse!) return albums.reversed.toList();
    return albums;
  }

  Future _load() async {
    if (settings.offlineMode) return;
    try {
      List<Album> albums = await deezerAPI.getAlbums();
      setState(() => _albums = albums);
    } catch (e) {}
  }

  @override
  void initState() {
    _load();
    //Load sorting
    int? index = Sorting.index(SortSourceTypes.ALBUMS);
    if (index != null) _sort = cache.sorts[index];

    super.initState();
  }

  Future _reverse() async {
    setState(() => _sort!.reverse = !_sort!.reverse!);
    //Save sorting in cache
    int? index = Sorting.index(SortSourceTypes.ALBUMS);
    if (index != null) {
      cache.sorts[index] = _sort;
    } else {
      cache.sorts.add(_sort);
    }
    await cache.save();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Albums'.i18n),
          actions: [
            IconButton(
              icon: Icon(
                _sort!.reverse!
                    ? FontAwesome5.sort_alpha_up
                    : FontAwesome5.sort_alpha_down,
                semanticLabel: _sort!.reverse!
                    ? "Sort descending".i18n
                    : "Sort ascending".i18n,
              ),
              onPressed: () => _reverse(),
            ),
            PopupMenuButton(
              color: Theme.of(context).scaffoldBackgroundColor,
              child: const Icon(Icons.sort, size: 32.0),
              onSelected: (SortType s) async {
                setState(() => _sort!.type = s);
                //Save to cache
                int? index = Sorting.index(SortSourceTypes.ALBUMS);
                if (index == null) {
                  cache.sorts.add(_sort);
                } else {
                  cache.sorts[index] = _sort;
                }
                await cache.save();
              },
              itemBuilder: (context) => <PopupMenuEntry<SortType>>[
                PopupMenuItem(
                  value: SortType.DEFAULT,
                  child: Text('Default'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.ALPHABETIC,
                  child: Text('Alphabetic'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.ARTIST,
                  child: Text('Artist'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.RELEASE_DATE,
                  child: Text('Release date'.i18n, style: popupMenuTextStyle()),
                ),
              ],
            ),
            const SizedBox(width: 8.0),
          ],
        ),
        body: !settings.offlineMode && _albums == null
            ? const Center(child: CircularProgressIndicator())
            : Scrollbar(
                interactive: true,
                controller: _scrollController,
                thickness: 8.0,
                child: ListView(
                  controller: _scrollController,
                  children: <Widget>[
                    const SizedBox(height: 8.0),
                    if (_albums != null)
                      ...List.generate(_albums!.length, (int i) {
                        Album a = _sorted[i];
                        return AlbumTile(
                          a,
                          onTap: () {
                            Navigator.of(context).pushRoute(
                                builder: (context) => AlbumDetails(a));
                          },
                          onSecondary: (details) {
                            MenuSheet m = MenuSheet(context);
                            m.defaultAlbumMenu(
                              a,
                              details: details,
                              onRemove: () {
                                setState(() => _albums!.remove(a));
                              },
                            );
                          },
                        );
                      }),
                    FutureBuilder(
                      future: downloadManager.getOfflineAlbums(),
                      builder: (context, snapshot) {
                        if (snapshot.hasError ||
                            !snapshot.hasData ||
                            (snapshot.data!).isEmpty) {
                          return const SizedBox(
                            height: 0,
                            width: 0,
                          );
                        }

                        List<Album> albums = snapshot.data as List<Album>;
                        return Column(
                          children: <Widget>[
                            const FreezerDivider(),
                            Text(
                              'Offline albums'.i18n,
                              textAlign: TextAlign.center,
                              style: const TextStyle(
                                  fontWeight: FontWeight.bold, fontSize: 24.0),
                            ),
                            ...List.generate(albums.length, (i) {
                              Album a = albums[i];
                              return AlbumTile(
                                a,
                                onTap: () {
                                  Navigator.of(context).pushRoute(
                                      builder: (context) => AlbumDetails(a));
                                },
                                onSecondary: (details) {
                                  MenuSheet m = MenuSheet(context);
                                  m.defaultAlbumMenu(a, details: details,
                                      onRemove: () {
                                    setState(() {
                                      albums.remove(a);
                                      _albums!.remove(a);
                                    });
                                  });
                                },
                              );
                            })
                          ],
                        );
                      },
                    )
                  ],
                ),
              ));
  }
}

class LibraryArtists extends StatefulWidget {
  const LibraryArtists({super.key});

  @override
  State<LibraryArtists> createState() => _LibraryArtistsState();
}

class _LibraryArtistsState extends State<LibraryArtists> {
  late List<Artist> _artists;
  Sorting? _sort = Sorting(sourceType: SortSourceTypes.ARTISTS);
  bool _loading = true;
  bool _error = false;
  final ScrollController _scrollController = ScrollController();

  List<Artist> get _sorted {
    List<Artist> artists = List.from(_artists);
    artists.sort((a, b) => a.favoriteDate!.compareTo(b.favoriteDate!));
    switch (_sort!.type) {
      case SortType.DEFAULT:
        break;
      case SortType.POPULARITY:
        artists.sort((a, b) => b.fans! - a.fans!);
        break;
      case SortType.ALPHABETIC:
        artists.sort(
            (a, b) => a.name!.toLowerCase().compareTo(b.name!.toLowerCase()));
        break;
      default:
        break;
    }
    //Reverse
    if (_sort!.reverse!) return artists.reversed.toList();
    return artists;
  }

  //Load data
  Future _load() async {
    setState(() => _loading = true);
    //Fetch
    List<Artist>? data;
    try {
      data = await deezerAPI.getArtists();
    } catch (e) {}
    //Update UI
    setState(() {
      if (data != null) {
        _artists = data;
      } else {
        _error = true;
      }
      _loading = false;
    });
  }

  Future _reverse() async {
    setState(() => _sort!.reverse = !_sort!.reverse!);
    //Save sorting in cache
    int? index = Sorting.index(SortSourceTypes.ARTISTS);
    if (index != null) {
      cache.sorts[index] = _sort;
    } else {
      cache.sorts.add(_sort);
    }
    await cache.save();
  }

  @override
  void initState() {
    //Restore sort
    int? index = Sorting.index(SortSourceTypes.ARTISTS);
    if (index != null) _sort = cache.sorts[index];

    _load();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Artists'.i18n),
          actions: [
            IconButton(
              icon: Icon(
                _sort!.reverse!
                    ? FontAwesome5.sort_alpha_up
                    : FontAwesome5.sort_alpha_down,
                semanticLabel: _sort!.reverse!
                    ? "Sort descending".i18n
                    : "Sort ascending".i18n,
              ),
              onPressed: () => _reverse(),
            ),
            PopupMenuButton(
              color: Theme.of(context).scaffoldBackgroundColor,
              onSelected: (SortType s) async {
                setState(() => _sort!.type = s);
                //Save
                int? index = Sorting.index(SortSourceTypes.ARTISTS);
                if (index == null) {
                  cache.sorts.add(_sort);
                } else {
                  cache.sorts[index] = _sort;
                }
                await cache.save();
              },
              itemBuilder: (context) => <PopupMenuEntry<SortType>>[
                PopupMenuItem(
                  value: SortType.DEFAULT,
                  child: Text('Default'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.ALPHABETIC,
                  child: Text('Alphabetic'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.POPULARITY,
                  child: Text('Popularity'.i18n, style: popupMenuTextStyle()),
                ),
              ],
              child: const Icon(Icons.sort, size: 32.0),
            ),
            const SizedBox(width: 8.0),
          ],
        ),
        body: _loading
            ? const Center(child: CircularProgressIndicator())
            : _error
                ? const Center(child: ErrorScreen())
                : Scrollbar(
                    interactive: true,
                    controller: _scrollController,
                    thickness: 8.0,
                    child: ListView(
                      controller: _scrollController,
                      children: <Widget>[
                        for (final artist in _sorted)
                          ArtistHorizontalTile(
                            artist,
                            onTap: () {
                              Navigator.of(context).pushRoute(
                                  builder: (context) => ArtistDetails(artist));
                            },
                            onHold: () {
                              MenuSheet m = MenuSheet(context);
                              m.defaultArtistMenu(artist, onRemove: () {
                                setState(() {
                                  _artists.remove(artist);
                                });
                              });
                            },
                          ),
                      ],
                    ),
                  ));
  }
}

class LibraryPlaylists extends StatefulWidget {
  const LibraryPlaylists({super.key});

  @override
  State<LibraryPlaylists> createState() => _LibraryPlaylistsState();
}

class _LibraryPlaylistsState extends State<LibraryPlaylists> {
  List<Playlist>? _playlists;
  Sorting? _sort = Sorting(sourceType: SortSourceTypes.PLAYLISTS);
  final ScrollController _scrollController = ScrollController();
  String _filter = '';

  List<Playlist> get _sorted {
    List<Playlist> playlists = List.from(_playlists!
        .where((p) => p.title!.toLowerCase().contains(_filter.toLowerCase())));
    switch (_sort!.type) {
      case SortType.DEFAULT:
        break;
      case SortType.USER:
        playlists.sort((a, b) => (a.user!.name ?? deezerAPI.userName)!
            .toLowerCase()
            .compareTo((b.user!.name ?? deezerAPI.userName)!.toLowerCase()));
        break;
      case SortType.TRACK_COUNT:
        playlists.sort((a, b) => b.trackCount! - a.trackCount!);
        break;
      case SortType.ALPHABETIC:
        playlists.sort(
            (a, b) => a.title!.toLowerCase().compareTo(b.title!.toLowerCase()));
        break;
      default:
        break;
    }
    if (_sort!.reverse!) return playlists.reversed.toList();
    return playlists;
  }

  Future _load() async {
    if (cache.favoritePlaylists != null) {
      setState(() => _playlists =
          cache.favoritePlaylists!.value.values.toList(growable: false));

      if (DateTime.now().difference(cache.favoritePlaylists!.updatedAt) <
          const Duration(hours: 1)) return;
    }
    if (!settings.offlineMode) {
      try {
        final List<Playlist> playlists = await deezerAPI.getPlaylists();
        setState(() => _playlists = playlists);
        if (cache.favoritePlaylists == null) {
          cache.favoritePlaylists =
              CacheEntry({for (final p in playlists) p.id: p});
        } else {
          // update non-destructively
          final oldEntry = cache.favoritePlaylists!.value;
          final newEntry = <String, Playlist>{};
          for (final playlist in playlists) {
            if (oldEntry.containsKey(playlist.id)) {
              newEntry[playlist.id] = oldEntry[playlist.id]!;
            } else {
              newEntry[playlist.id] = playlist;
            }
          }
        }
        await cache.save();
        return;
      } catch (e) {}
    }
  }

  Future _reverse() async {
    setState(() => _sort!.reverse = !_sort!.reverse!);
    //Save sorting in cache
    int? index = Sorting.index(SortSourceTypes.PLAYLISTS);
    if (index != null) {
      cache.sorts[index] = _sort;
    } else {
      cache.sorts.add(_sort);
    }
    await cache.save();
  }

  @override
  void initState() {
    //Restore sort
    int? index = Sorting.index(SortSourceTypes.PLAYLISTS);
    if (index != null) _sort = cache.sorts[index];

    _load();
    super.initState();
  }

  Playlist get favoritesPlaylist => Playlist(
      id: deezerAPI.favoritesPlaylistId!,
      title: 'Favorites'.i18n,
      user: User(name: deezerAPI.userName),
      image: UrlImageDetails.single('assets/favorites_thumb.jpg'),
      tracks: [],
      trackCount: 1,
      duration: const Duration(seconds: 0));

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Playlists'.i18n),
          actions: [
            IconButton(
              icon: Icon(
                _sort!.reverse!
                    ? FontAwesome5.sort_alpha_up
                    : FontAwesome5.sort_alpha_down,
                semanticLabel: _sort!.reverse!
                    ? "Sort descending".i18n
                    : "Sort ascending".i18n,
              ),
              onPressed: () => _reverse(),
            ),
            PopupMenuButton(
              color: Theme.of(context).scaffoldBackgroundColor,
              onSelected: (SortType s) async {
                setState(() => _sort!.type = s);
                //Save to cache
                int? index = Sorting.index(SortSourceTypes.PLAYLISTS);
                if (index == null) {
                  cache.sorts.add(_sort);
                } else {
                  cache.sorts[index] = _sort;
                }

                await cache.save();
              },
              itemBuilder: (context) => <PopupMenuEntry<SortType>>[
                PopupMenuItem(
                  value: SortType.DEFAULT,
                  child: Text('Default'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.USER,
                  child: Text('User'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.TRACK_COUNT,
                  child: Text('Track count'.i18n, style: popupMenuTextStyle()),
                ),
                PopupMenuItem(
                  value: SortType.ALPHABETIC,
                  child: Text('Alphabetic'.i18n, style: popupMenuTextStyle()),
                ),
              ],
              child: const Icon(Icons.sort, size: 32.0),
            ),
            Container(width: 8.0),
          ],
        ),
        body: Scrollbar(
          interactive: true,
          controller: _scrollController,
          thickness: 8.0,
          child: ListView(
            controller: _scrollController,
            children: <Widget>[
              //Search
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: TextField(
                    onChanged: (String s) => setState(() => _filter = s),
                    decoration: InputDecoration(
                      labelText: 'Search'.i18n,
                      filled: true,
                      focusedBorder: const OutlineInputBorder(
                          borderSide: BorderSide(color: Colors.grey)),
                      enabledBorder: const OutlineInputBorder(
                          borderSide: BorderSide(color: Colors.grey)),
                    )),
              ),
              ListTile(
                title: Text('Create new playlist'.i18n),
                leading: const LeadingIcon(Icons.playlist_add,
                    color: Color(0xff009a85)),
                onTap: () async {
                  if (settings.offlineMode) {
                    ScaffoldMessenger.of(context)
                        .snack('Cannot create playlists in offline mode'.i18n);
                    return;
                  }
                  MenuSheet m = MenuSheet(context);
                  await m.createPlaylist();
                  await _load();
                },
              ),
              const FreezerDivider(),

              if (!settings.offlineMode && _playlists == null)
                const Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    CircularProgressIndicator(),
                  ],
                ),

              //Favorites playlist
              PlaylistTile(
                favoritesPlaylist,
                onTap: () async {
                  Navigator.of(context).pushRoute(
                      builder: (context) => PlaylistDetails(favoritesPlaylist));
                },
                onSecondary: (details) {
                  MenuSheet m = MenuSheet(context);
                  favoritesPlaylist.library = true;
                  m.defaultPlaylistMenu(favoritesPlaylist, details: details);
                },
              ),

              if (_playlists != null)
                ...List.generate(_sorted.length, (int i) {
                  Playlist p = _sorted[i];
                  return PlaylistTile(
                    p,
                    onTap: () => Navigator.of(context)
                        .pushRoute(builder: (context) => PlaylistDetails(p)),
                    onSecondary: (details) {
                      MenuSheet m = MenuSheet(context);
                      m.defaultPlaylistMenu(p, details: details, onRemove: () {
                        setState(() => _playlists!.remove(p));
                      }, onUpdate: () {
                        _load();
                      });
                    },
                  );
                }),

              FutureBuilder(
                future: downloadManager.getOfflinePlaylists(),
                builder: (context, AsyncSnapshot<List<Playlist>> snapshot) {
                  if (snapshot.hasError ||
                      !snapshot.hasData ||
                      snapshot.data!.isEmpty) {
                    return const SizedBox.shrink();
                  }

                  List<Playlist> playlists = snapshot.data!;
                  return Column(
                    children: <Widget>[
                      const FreezerDivider(),
                      Text(
                        'Offline playlists'.i18n,
                        textAlign: TextAlign.center,
                        style: const TextStyle(
                            fontSize: 24.0, fontWeight: FontWeight.bold),
                      ),
                      ...List.generate(playlists.length, (i) {
                        Playlist p = playlists[i];
                        return PlaylistTile(
                          p,
                          onTap: () => Navigator.of(context).pushRoute(
                              builder: (context) => PlaylistDetails(p)),
                          onSecondary: (details) {
                            MenuSheet m = MenuSheet(context);
                            m.defaultPlaylistMenu(p, details: details,
                                onRemove: () {
                              setState(() {
                                playlists.remove(p);
                                _playlists!.remove(p);
                              });
                            });
                          },
                        );
                      })
                    ],
                  );
                },
              )
            ],
          ),
        ));
  }
}

class HistoryScreen extends StatefulWidget {
  const HistoryScreen({super.key});

  @override
  State<HistoryScreen> createState() => _HistoryScreenState();
}

class _HistoryScreenState extends State<HistoryScreen> {
  final ScrollController _scrollController = ScrollController();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('History'.i18n),
        actions: [
          IconButton(
            icon: Icon(
              Icons.delete_sweep,
              semanticLabel: "Clear all".i18n,
            ),
            onPressed: () {
              setState(() => cache.history = []);
              cache.save();
            },
          )
        ],
      ),
      body: Scrollbar(
          interactive: true,
          controller: _scrollController,
          thickness: 8.0,
          child: ListView.builder(
            controller: _scrollController,
            itemCount: cache.history.length,
            itemBuilder: (BuildContext context, int i) {
              Track t = cache.history[cache.history.length - i - 1];
              return TrackTile.fromTrack(
                t,
                onTap: () {
                  playerHelper.playFromTrackList(
                      cache.history.reversed.toList(),
                      t.id,
                      QueueSource(
                          id: null, text: 'History'.i18n, source: 'history'));
                },
                onSecondary: (details) {
                  MenuSheet m = MenuSheet(context);
                  m.defaultTrackMenu(t, details: details);
                },
                checkTrackOffline: false,
              );
            },
          )),
    );
  }
}