import 'dart:typed_data';

import 'package:cardash_launcher/data/services/jellyfin_library_service.dart';
import 'package:cardash_launcher/features/jellyfin/jellyfin_playback_controller.dart';
import 'package:cardash_launcher/features/settings/jellyfin_controller.dart';
import 'package:flutter_test/flutter_test.dart';

import 'jellyfin_fakes.dart';

class _Fixture {
  _Fixture({
    required this.jellyfin,
    required this.gateway,
    required this.library,
    required this.platform,
    required this.playback,
  });

  final JellyfinController jellyfin;
  final FakeJellyfinLibraryGateway gateway;
  final JellyfinLibraryService library;
  final FakeJellyfinPlaybackPlatform platform;
  final JellyfinPlaybackController playback;
}

Future<_Fixture> _fixture() async {
  final jellyfin = await configuredJellyfinController();
  final gateway = FakeJellyfinLibraryGateway()
    ..tracks = {
      'album-1': [
        track('t1', albumId: 'album-1', albumName: 'Album 1', index: 1),
        track('t2', albumId: 'album-1', albumName: 'Album 1', index: 2),
        track('t3', albumId: 'album-1', albumName: 'Album 1', index: 3),
      ],
      'album-2': [
        track('u1', albumId: 'album-2', albumName: 'Album 2', index: 1),
        track('u2', albumId: 'album-2', albumName: 'Album 2', index: 2),
      ],
    }
    ..artwork = Uint8List.fromList([1, 2, 3]);
  final library = testLibraryService(jellyfin, gateway);
  final platform = FakeJellyfinPlaybackPlatform();
  final playback = JellyfinPlaybackController(
    platform,
    library,
    jellyfin,
    pollInterval: const Duration(hours: 1),
  );
  return _Fixture(
    jellyfin: jellyfin,
    gateway: gateway,
    library: library,
    platform: platform,
    playback: playback,
  );
}

void main() {
  test('starts an album and exposes the current track', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    final error = await fixture.playback.playAlbum(album('album-1'));

    expect(error, isNull);
    expect(fixture.platform.setQueueCalls, 1);
    expect(fixture.playback.isActive, isTrue);
    expect(fixture.playback.playing, isTrue);
    expect(fixture.playback.currentItem?.trackId, 't1');
    expect(fixture.playback.mediaPlayback.title, 'Track t1');
    expect(fixture.playback.queueItems.length, 3);
    expect(fixture.platform.queue?.artwork, [1, 2, 3]);
    expect(
      fixture.platform.queue?.authorization,
      contains('Token="test-token"'),
    );
  });

  test('the same album is not rebuilt but a different album is', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    await fixture.playback.playAlbum(album('album-1'));
    expect(fixture.platform.setQueueCalls, 1);

    await fixture.playback.playAlbum(album('album-2'));
    expect(fixture.platform.setQueueCalls, 2);
    expect(fixture.playback.currentItem?.trackId, 'u1');
  });

  test('toggle pauses and resumes without losing the position', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    await fixture.playback.toggle();
    expect(fixture.playback.playing, isFalse);
    expect(fixture.platform.commands, contains('pause'));

    await fixture.playback.toggle();
    expect(fixture.playback.playing, isTrue);
    expect(fixture.platform.commands, contains('play'));
  });

  test('next and previous move through the queue', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    await fixture.playback.next();
    expect(fixture.playback.currentItem?.trackId, 't2');
    expect(fixture.playback.canGoPrevious, isTrue);

    await fixture.playback.previous();
    expect(fixture.playback.currentItem?.trackId, 't1');
  });

  test('selecting a track seeks to its queue index', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    await fixture.playback.playTrackAt(2);

    expect(fixture.platform.commands, contains('seekToIndex:2'));
    expect(fixture.playback.currentItem?.trackId, 't3');
    expect(fixture.playback.playing, isTrue);
  });

  test('tapping play after the end restarts at track one', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    fixture.platform.state = fixture.platform.state.copyWith(
      playing: false,
      positionMs: fixture.platform.state.durationMs,
    );
    await fixture.playback.restore();
    await fixture.playback.toggle();

    expect(fixture.platform.commands, contains('seekToIndex:0'));
    expect(fixture.playback.playing, isTrue);
    expect(fixture.playback.snapshot.positionMs, 0);
  });

  test('stop clears the queue and snapshot', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    await fixture.playback.stop();

    expect(fixture.playback.isActive, isFalse);
    expect(fixture.playback.queueItems, isEmpty);
    expect(fixture.playback.snapshot.available, isFalse);
  });

  test('notification permission delegates to the platform', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    expect(fixture.platform.permissionGranted, isFalse);
    expect(await fixture.playback.notificationPermissionGranted(), isFalse);
    expect(await fixture.playback.requestNotificationPermission(), isTrue);
    expect(fixture.platform.permissionGranted, isTrue);
  });

  test('media progress falls back to the queued track duration', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    await fixture.playback.playAlbum(album('album-1'));
    fixture.platform.zeroDuration = true;
    fixture.platform.state = fixture.platform.snapshotAt(
      0,
      playing: true,
      positionMs: 30000,
    );

    await fixture.playback.toggle();

    expect(fixture.playback.snapshot.durationMs, 0);
    final media = fixture.playback.mediaPlayback;
    expect(media.durationMs, fixture.playback.currentItem!.durationMs);
    expect(media.positionMs, 30000);
    expect(media.progress, greaterThan(0));
  });

  test('a failed queue start surfaces an error', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);
    fixture.platform.setQueueResult = false;

    final error = await fixture.playback.playAlbum(album('album-1'));

    expect(error, isNotNull);
    expect(fixture.playback.error, isNotNull);
    expect(fixture.playback.isActive, isFalse);
  });

  test('an album with no playable tracks reports an error', () async {
    final fixture = await _fixture();
    addTearDown(fixture.playback.dispose);
    addTearDown(fixture.jellyfin.dispose);

    final error = await fixture.playback.playAlbum(album('missing'));

    expect(error, contains('No playable tracks'));
    expect(fixture.playback.error, contains('No playable tracks'));
  });
}