import 'dart:async';

import 'package:audio_session/audio_session.dart';
import 'package:flutter/foundation.dart';
import 'package:just_audio_background/just_audio_background.dart';
import 'package:just_audio/just_audio.dart';

class StreamingAudioBusinessObject extends ChangeNotifier {
  StreamingAudioBusinessObject({
    this.streamUrl = 'https://kryz.out.airtime.pro/kryz_a',
  }) {
    _playerStateSubscription = _player.playerStateStream.listen((state) {
      final isCurrentlyPlaying =
          state.playing && state.processingState != ProcessingState.completed;

      if (_isPlaying != isCurrentlyPlaying) {
        _isPlaying = isCurrentlyPlaying;
        notifyListeners();
      }
    });
  }

  final String streamUrl;
  final AudioPlayer _player = AudioPlayer();
  late final StreamSubscription<PlayerState> _playerStateSubscription;
  bool _isSourceLoaded = false;
  bool _isPlaying = false;
  bool _isAudioSessionConfigured = false;

  bool get isPlaying => _isPlaying;

  Future<void> _configureAudioSessionIfNeeded() async {
    if (_isAudioSessionConfigured) {
      return;
    }

    final session = await AudioSession.instance;
    await session.configure(const AudioSessionConfiguration.music());
    _isAudioSessionConfigured = true;
  }

  Future<void> play() async {
    await _configureAudioSessionIfNeeded();

    if (!_isSourceLoaded) {
      await _player.setAudioSource(
        AudioSource.uri(
          Uri.parse(streamUrl),
          tag: const MediaItem(
            id: 'kryz-live-stream',
            title: 'KRYZ Live Stream',
            artist: 'KRYZ Radio',
            album: 'Live',
          ),
        ),
      );
      _isSourceLoaded = true;
    }

    final session = await AudioSession.instance;
    await session.setActive(true);
    await _player.play();
  }

  Future<void> stop() async {
    await _player.stop();
  }

  @override
  void dispose() {
    _playerStateSubscription.cancel();
    _player.dispose();
    super.dispose();
  }
}