import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:freezer/api/definitions.dart';
import 'package:freezer/settings.dart';
import 'package:freezer/ui/menu.dart';
import 'package:freezer/api/importer.dart';
import 'package:freezer/api/spotify.dart';
import 'package:freezer/ui/elements.dart';
import 'package:freezer/translations.i18n.dart';
import 'package:spotify/spotify.dart' as spotify;

import 'dart:async';

import 'package:url_launcher/url_launcher_string.dart';

class SpotifyImporterV1 extends StatefulWidget {
  const SpotifyImporterV1({super.key});

  @override
  State<SpotifyImporterV1> createState() => _SpotifyImporterV1State();
}

class _SpotifyImporterV1State extends State<SpotifyImporterV1> {
  late String _url;
  bool _error = false;
  bool _loading = false;
  SpotifyPlaylist? _data;

  //Load URL
  Future _load() async {
    setState(() {
      _error = false;
      _loading = true;
    });
    try {
      String? uri = await SpotifyScrapper.resolveUrl(_url);

      //Error/NonPlaylist
      if (uri == null || uri.split(':')[1] != 'playlist') {
        throw Exception();
      }
      //Load
      SpotifyPlaylist data = await SpotifyScrapper.playlist(uri);
      setState(() => _data = data);
      return;
    } catch (e) {
      setState(() {
        _error = true;
        _loading = false;
      });
      return;
    }
  }

  //Start importing
  Future _start() async {
    List<ImporterTrack> tracks = _data!.toImporter();
    await importer.start(context, _data!.name, _data!.description, tracks);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Importer'.i18n)),
      body: ListView(
        children: <Widget>[
          ListTile(
            title: Text(
                'Currently supporting only Spotify, with 100 tracks limit'
                    .i18n),
            subtitle: Text('Due to API limitations'.i18n),
            leading: const Icon(
              Icons.warning,
              color: Colors.deepOrangeAccent,
            ),
          ),
          const ListTile(
            title: Text('It\'s broken.'),
            subtitle: Text('Use importer V2'),
            leading: Icon(
              Icons.warning,
              color: Colors.deepOrangeAccent,
            ),
          ),
          const FreezerDivider(),
          Container(
            height: 16.0,
          ),
          Text(
            'Enter your playlist link below'.i18n,
            textAlign: TextAlign.center,
            style: const TextStyle(fontSize: 20.0),
          ),
          Padding(
            padding:
                const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
            child: Row(
              children: <Widget>[
                Expanded(
                  child: TextField(
                    onChanged: (String s) => _url = s,
                    onSubmitted: (String s) {
                      _url = s;
                      _load();
                    },
                    decoration: const InputDecoration(hintText: 'URL'),
                  ),
                ),
                IconButton(
                  icon: Icon(
                    Icons.search,
                    semanticLabel: "Search".i18n,
                  ),
                  onPressed: () => _load(),
                )
              ],
            ),
          ),
          Container(
            height: 8.0,
          ),

          if (_data == null && _loading)
            const Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[CircularProgressIndicator()],
            ),
          if (_error)
            ListTile(
              title: Text('Error loading URL!'.i18n),
              leading: const Icon(
                Icons.error,
                color: Colors.red,
              ),
            ),
          //Playlist
          if (_data != null) ...[
            const FreezerDivider(),
            ListTile(
                title: Text(_data!.name!),
                subtitle: Text((_data!.description ?? '') == ''
                    ? '${_data!.tracks!.length} tracks'
                    : _data!.description!),
                leading: Image.network(_data!.image ??
                    'http://cdn-images.deezer.com/images/cover//256x256-000000-80-0-0.jpg')),
            const ImporterSettings(),
            Padding(
              padding:
                  const EdgeInsets.symmetric(vertical: 4.0, horizontal: 16.0),
              child: ElevatedButton(
                child: Text('Start import'.i18n),
                onPressed: () async {
                  final navigator = Navigator.of(context);
                  await _start();
                  navigator.pushReplacement(MaterialPageRoute(
                      builder: (context) => const ImporterStatusScreen()));
                },
              ),
            ),
          ]
        ],
      ),
    );
  }
}

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

  @override
  State<ImporterSettings> createState() => _ImporterSettingsState();
}

class _ImporterSettingsState extends State<ImporterSettings> {
  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        ListTile(
          title: Text('Download imported tracks'.i18n),
          leading: Switch(
            value: importer.download,
            onChanged: (v) => setState(() => importer.download = v),
          ),
        ),
      ],
    );
  }
}

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

  @override
  State<ImporterStatusScreen> createState() => _ImporterStatusScreenState();
}

class _ImporterStatusScreenState extends State<ImporterStatusScreen> {
  bool _done = false;
  StreamSubscription? _subscription;

  @override
  void initState() {
    //If import done mark as not done, to prevent double routing
    if (importer.done) {
      _done = true;
      importer.done = false;
    }

    //Update
    _subscription = importer.updateStream.listen((event) {
      setState(() {
        //Unset done so this page doesn't reopen
        if (importer.done) {
          _done = true;
          importer.done = false;
        }
      });
    });

    super.initState();
  }

  @override
  void dispose() {
    _subscription?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Importing...'.i18n)),
      body: ListView(
        children: [
          // Spinner
          if (!_done)
            const Padding(
              padding: EdgeInsets.symmetric(vertical: 8.0),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[CircularProgressIndicator()],
              ),
            ),

          // Progress indicator
          Row(
            mainAxisSize: MainAxisSize.max,
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: <Widget>[
              Row(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  const Icon(
                    Icons.import_export,
                    size: 24.0,
                  ),
                  Container(
                    width: 4.0,
                  ),
                  Text(
                    '${importer.ok + importer.error}/${importer.tracks.length}',
                    style: const TextStyle(fontSize: 24.0),
                  )
                ],
              ),
              Row(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  const Icon(
                    Icons.done,
                    size: 24.0,
                  ),
                  Container(
                    width: 4.0,
                  ),
                  Text(
                    '${importer.ok}',
                    style: const TextStyle(fontSize: 24.0),
                  )
                ],
              ),
              Row(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  const Icon(
                    Icons.error,
                    size: 24.0,
                  ),
                  Container(
                    width: 4.0,
                  ),
                  Text(
                    '${importer.error}',
                    style: const TextStyle(fontSize: 24.0),
                  ),
                ],
              ),

              //When Done
              if (_done)
                TextButton(
                  child: Text('Playlist menu'.i18n),
                  onPressed: () {
                    MenuSheet m = MenuSheet(context);
                    m.defaultPlaylistMenu(importer.playlist!);
                  },
                )
            ],
          ),

          const SizedBox(height: 8.0),
          const FreezerDivider(),

          //Tracks
          ...List.generate(importer.tracks.length, (i) {
            ImporterTrack t = importer.tracks[i];
            return ListTile(
              leading: t.state.icon,
              title: Text(t.title!),
              subtitle: Text(
                t.artists!.join(", "),
                maxLines: 1,
              ),
            );
          })
        ],
      ),
    );
  }
}

class SpotifyImporterV2 extends StatefulWidget {
  const SpotifyImporterV2({super.key});

  @override
  State<SpotifyImporterV2> createState() => _SpotifyImporterV2State();
}

class _SpotifyImporterV2State extends State<SpotifyImporterV2> {
  bool _authorizing = false;
  String? _clientId;
  String? _clientSecret;
  final SpotifyAPIWrapper spotify = SpotifyAPIWrapper();

  //Spotify authorization flow
  Future _authorize() async {
    setState(() => _authorizing = true);
    await spotify.authorize(_clientId, _clientSecret);
    //Save credentials
    settings.spotifyClientId = _clientId;
    settings.spotifyClientSecret = _clientSecret;
    await settings.save();
    setState(() => _authorizing = false);
    //Redirect
    if (context.mounted) {
      Navigator.of(context).pushReplacement(MaterialPageRoute(
          builder: (context) => SpotifyImporterV2Main(spotify)));
    }
  }

  @override
  void initState() {
    _clientId = settings.spotifyClientId;
    _clientSecret = settings.spotifyClientSecret;

    //Try saved
    spotify.trySaved().then((r) {
      if (r) {
        Navigator.of(context).pushReplacement(MaterialPageRoute(
            builder: (context) => SpotifyImporterV2Main(spotify)));
      }
    });

    super.initState();
  }

  @override
  void dispose() {
    //Stop server
    spotify.cancelAuthorize();

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Spotify Importer v2".i18n)),
      body: ListView(
        children: [
          Padding(
            padding:
                const EdgeInsets.symmetric(vertical: 12.0, horizontal: 8.0),
            child: Text(
              "This importer requires Spotify Client ID and Client Secret. To obtain them:"
                  .i18n,
              textAlign: TextAlign.center,
              style: const TextStyle(
                fontSize: 18.0,
              ),
            ),
          ),
          Padding(
              padding: const EdgeInsets.symmetric(horizontal: 8.0),
              child: Text(
                "1. Go to: developer.spotify.com/dashboard and create an app."
                    .i18n,
                textAlign: TextAlign.center,
                style: const TextStyle(
                  fontSize: 16.0,
                ),
              )),
          Padding(
            padding:
                const EdgeInsets.symmetric(vertical: 4.0, horizontal: 16.0),
            child: ElevatedButton(
              child: Text("Open in Browser".i18n),
              onPressed: () {
                launchUrlString("https://developer.spotify.com/dashboard");
              },
            ),
          ),
          const SizedBox(height: 16.0),
          Padding(
              padding: const EdgeInsets.symmetric(horizontal: 8.0),
              child: Text(
                "${"2. In the app you just created go to settings, and set the Redirect URL to: ".i18n}http://localhost:42069",
                textAlign: TextAlign.center,
                style: const TextStyle(
                  fontSize: 16.0,
                ),
              )),
          Padding(
            padding:
                const EdgeInsets.symmetric(vertical: 4.0, horizontal: 16.0),
            child: ElevatedButton(
              child: Text("Copy the Redirect URL".i18n),
              onPressed: () async {
                await Clipboard.setData(
                    const ClipboardData(text: "http://localhost:42069"));
                Fluttertoast.showToast(msg: "Copied".i18n);
              },
            ),
          ),
          Padding(
            padding:
                const EdgeInsets.symmetric(horizontal: 16.0, vertical: 16.0),
            child: Row(
              mainAxisSize: MainAxisSize.max,
              children: [
                Flexible(
                  child: TextField(
                    controller: TextEditingController(text: _clientId),
                    decoration: InputDecoration(labelText: "Client ID".i18n),
                    onChanged: (v) => setState(() => _clientId = v),
                  ),
                ),
                const SizedBox(width: 16.0),
                Flexible(
                  child: TextField(
                    controller: TextEditingController(text: _clientSecret),
                    obscureText: true,
                    decoration:
                        InputDecoration(labelText: "Client Secret".i18n),
                    onChanged: (v) => setState(() => _clientSecret = v),
                  ),
                ),
              ],
            ),
          ),
          Padding(
            padding:
                const EdgeInsets.symmetric(vertical: 4.0, horizontal: 16.0),
            child: ElevatedButton(
                onPressed: (_clientId != null &&
                        _clientSecret != null &&
                        !_authorizing)
                    ? () => _authorize()
                    : null,
                child: Text("Authorize".i18n)),
          ),
          if (_authorizing)
            const Padding(
              padding: EdgeInsets.symmetric(vertical: 8.0),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [CircularProgressIndicator()],
              ),
            )
        ],
      ),
    );
  }
}

class SpotifyImporterV2Main extends StatefulWidget {
  final SpotifyAPIWrapper spotify;
  const SpotifyImporterV2Main(this.spotify, {Key? key}) : super(key: key);

  @override
  State<SpotifyImporterV2Main> createState() => _SpotifyImporterV2MainState();
}

class _SpotifyImporterV2MainState extends State<SpotifyImporterV2Main> {
  late String _url;
  bool _urlLoading = false;
  spotify.Playlist? _urlPlaylist;
  bool _playlistsLoading = true;
  List<spotify.PlaylistSimple>? _playlists;

  @override
  void initState() {
    _loadPlaylists();
    super.initState();
  }

  //Load playlists
  Future _loadPlaylists() async {
    var pages = widget.spotify.spotify.users.playlists(widget.spotify.me.id!);
    _playlists = List.from(await pages.all());
    setState(() => _playlistsLoading = false);
  }

  Future _loadUrl() async {
    setState(() => _urlLoading = true);
    //Resolve URL
    try {
      String? uri = await SpotifyScrapper.resolveUrl(_url);
      //Error/NonPlaylist
      if (uri == null || uri.split(':')[1] != 'playlist') {
        throw Exception();
      }
      //Get playlist
      spotify.Playlist playlist =
          await widget.spotify.spotify.playlists.get(uri.split(":")[2]);
      setState(() {
        _urlLoading = false;
        _urlPlaylist = playlist;
      });
    } catch (e) {
      Fluttertoast.showToast(msg: "Invalid/Unsupported URL".i18n);
      setState(() => _urlLoading = false);
      return;
    }
  }

  Future _startImport(String? title, String? description, String? id) async {
    //Show loading dialog
    showDialog(
        context: context,
        barrierDismissible: false,
        builder: (context) => WillPopScope(
            onWillPop: () => Future.value(false),
            child: AlertDialog(
                title: Text("Please wait...".i18n),
                content: const Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [CircularProgressIndicator()],
                ))));

    try {
      //Fetch entire playlist
      var pages = widget.spotify.spotify.playlists.getTracksByPlaylistId(id);
      var all = await pages.all();
      //Map to importer track
      List<ImporterTrack> tracks = all
          .map((t) => ImporterTrack(
              t.name, t.artists!.map((a) => a.name).toList(),
              isrc: t.externalIds!.isrc))
          .toList();
      if (!context.mounted) return;
      await importer.start(context, title, description, tracks);

      if (!context.mounted) return;
    } catch (e, st) {
      print(e);
      print(st);
      ScaffoldMessenger.of(context).snack(e.toString());
      Navigator.of(context, rootNavigator: true).pop();
      return;
    }

    //Route
    Navigator.of(context, rootNavigator: true).pop();
    Navigator.of(context).pushReplacement(
        MaterialPageRoute(builder: (context) => const ImporterStatusScreen()));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("Spotify Importer v2".i18n)),
        body: ListView(
          children: [
            Padding(
              padding:
                  const EdgeInsets.symmetric(vertical: 8.0, horizontal: 16.0),
              child: Text(
                  'Logged in as: '.i18n + widget.spotify.me.displayName!,
                  maxLines: 1,
                  textAlign: TextAlign.center,
                  style: const TextStyle(
                      fontSize: 18.0, fontWeight: FontWeight.bold)),
            ),
            const FreezerDivider(),
            Container(height: 4.0),
            Text(
              "Options".i18n,
              textAlign: TextAlign.center,
              style:
                  const TextStyle(fontSize: 18.0, fontWeight: FontWeight.bold),
            ),
            const ImporterSettings(),
            const FreezerDivider(),
            Container(height: 4.0),
            Text(
              "Import playlists by URL".i18n,
              textAlign: TextAlign.center,
              style:
                  const TextStyle(fontSize: 18.0, fontWeight: FontWeight.bold),
            ),
            Padding(
                padding:
                    const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
                child: Row(
                  children: [
                    Expanded(
                      child: TextField(
                          decoration: InputDecoration(hintText: "URL".i18n),
                          onChanged: (v) => setState(() => _url = v)),
                    ),
                    IconButton(
                      icon: const Icon(Icons.search),
                      onPressed: () => _loadUrl(),
                    )
                  ],
                )),
            if (_urlLoading)
              const Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Padding(
                    padding: EdgeInsets.symmetric(vertical: 4.0),
                    child: CircularProgressIndicator(),
                  )
                ],
              ),
            if (_urlPlaylist != null)
              ListTile(
                  title: Text(_urlPlaylist!.name!),
                  subtitle: Text(_urlPlaylist!.description ?? ''),
                  leading: Image.network(_urlPlaylist!.images!.first.url ??
                      "http://cdn-images.deezer.com/images/cover//256x256-000000-80-0-0.jpg")),
            if (_urlPlaylist != null)
              Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 16.0),
                  child: ElevatedButton(
                      child: Text("Import".i18n),
                      onPressed: () {
                        _startImport(_urlPlaylist!.name,
                            _urlPlaylist!.description, _urlPlaylist!.id);
                      })),

            // Playlists
            const FreezerDivider(),
            Container(height: 4.0),
            Text("Playlists".i18n,
                textAlign: TextAlign.center,
                style: const TextStyle(
                    fontSize: 18.0, fontWeight: FontWeight.bold)),
            Container(height: 4.0),
            if (_playlistsLoading)
              const Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Padding(
                    padding: EdgeInsets.symmetric(vertical: 4.0),
                    child: CircularProgressIndicator(),
                  )
                ],
              ),
            if (!_playlistsLoading && _playlists != null)
              ...List.generate(_playlists!.length, (i) {
                spotify.PlaylistSimple p = _playlists![i];
                return ListTile(
                  title: Text(p.name!, maxLines: 1),
                  subtitle: Text(p.owner!.displayName!, maxLines: 1),
                  leading: Image.network((p.images?.isEmpty ?? true)
                      ? "http://cdn-images.deezer.com/images/cover//256x256-000000-80-0-0.jpg"
                      : p.images!.first.url!),
                  onTap: () {
                    _startImport(p.name, "", p.id);
                  },
                );
              })
          ],
        ));
  }
}