import 'package:audioplayers/audioplayers.dart' as audioplayers;
import 'package:flutter/foundation.dart';
import 'package:just_audio/just_audio.dart' as justaudio;

enum AudioWrapper_Mode {
  Web,
  Mobile
}

enum AudioWrapper_State {
  Playing,
  NotPlaying
}

class AudioWrapper {

  audioplayers.AudioPlayer _audioPlayer_AudioPlayer = audioplayers.AudioPlayer();
  justaudio.AudioPlayer _justAudio_AudioPlayer = justaudio.AudioPlayer();

  AudioWrapper_Mode mode = kIsWeb ? AudioWrapper_Mode.Web : AudioWrapper_Mode.Mobile;

  AudioWrapper() {
    // mode = AudioWrapper_Mode.Web;

    print("AudioWrapper mode: $mode");

    // mode = AudioWrapper_Mode.Mobile;
  }

  justaudio.AudioSource _convertSource_JustAudio(AudioWrapperSource source){
    if (source is AudioWrapperByteSource){
      return _ByteSource(source.bytes);
    } else if (source is AudioWrapperAssetSource){
      return justaudio.AudioSource.asset(source.assetPath);
    } else {
      throw Exception("Unknown source type");
    }
  }

  audioplayers.Source _convertSource_AudioPlayers(AudioWrapperSource source){
    if (source is AudioWrapperByteSource){
      return audioplayers.BytesSource(source.bytes);
    } else if (source is AudioWrapperAssetSource){
      return audioplayers.AssetSource(source.assetPath);
    } else {
      throw Exception("Unknown source type");
    }
  }


  Future<void> loadSource(AudioWrapperSource source) async {
    if (mode == AudioWrapper_Mode.Web) {
      // Use just_audio

      justaudio.AudioSource audioSource = _convertSource_JustAudio(source);

      await _justAudio_AudioPlayer.setAudioSource(audioSource);

    } else if (mode == AudioWrapper_Mode.Mobile) {
      // Use audioplayers

      audioplayers.Source audioSource = _convertSource_AudioPlayers(source);

      await _audioPlayer_AudioPlayer.setSource(audioSource);
      // await _audioPlayer_AudioPlayer.play(audioSource);
    }
  }

  Future<Duration?> getDuration() async {
    if (mode == AudioWrapper_Mode.Web) {
      return _justAudio_AudioPlayer.duration;
    } else if (mode == AudioWrapper_Mode.Mobile) {
      return await _audioPlayer_AudioPlayer.getDuration();
    }
  }

  Future<Duration?> play() async {

    Duration? duration;

    if (mode == AudioWrapper_Mode.Web) {
      _justAudio_AudioPlayer.play();
      duration = _justAudio_AudioPlayer.duration;
    } else if (mode == AudioWrapper_Mode.Mobile) {
      _audioPlayer_AudioPlayer.resume();
      duration = await _audioPlayer_AudioPlayer.getDuration();
    }
    return duration;
  }

  // Future<Duration?> play(AudioWrapperSource source) async {
  //
  //   Duration? duration;
  //
  //   if (mode == AudioWrapper_Mode.Web) {
  //     // Use just_audio
  //
  //     justaudio.AudioSource audioSource = _convertSource_JustAudio(source);
  //
  //     duration = await _justAudio_AudioPlayer.setAudioSource(audioSource);
  //
  //     _justAudio_AudioPlayer.play();
  //
  //
  //   } else if (mode == AudioWrapper_Mode.Mobile) {
  //     // Use audioplayers
  //
  //     audioplayers.Source audioSource = _convertSource_AudioPlayers(source);
  //
  //     await _audioPlayer_AudioPlayer.play(audioSource);
  //
  //     duration = await _audioPlayer_AudioPlayer.getDuration();
  //   }
  //
  //
  //
  //   return duration;
  // }

  void stop(){
    if (mode == AudioWrapper_Mode.Web) {
      _justAudio_AudioPlayer.stop();
      try {
        _justAudio_AudioPlayer.dispose();
      } catch (e) {}
      _justAudio_AudioPlayer = justaudio.AudioPlayer();
    } else if (mode == AudioWrapper_Mode.Mobile) {
      _audioPlayer_AudioPlayer.stop();
      try {
        _audioPlayer_AudioPlayer.dispose();
      } catch (e) {}
      _audioPlayer_AudioPlayer = audioplayers.AudioPlayer();
    }
  }

  AudioWrapper_State get state {
    if (mode == AudioWrapper_Mode.Web) {
      if (_justAudio_AudioPlayer.playing){
        return AudioWrapper_State.Playing;
      } else {
        return AudioWrapper_State.NotPlaying;
      }
    } else {
      if (_audioPlayer_AudioPlayer.state == audioplayers.PlayerState.playing){
        return AudioWrapper_State.Playing;
      } else {
        return AudioWrapper_State.NotPlaying;
      }
    }
  }

}

class AudioWrapperSource {

}

class AudioWrapperByteSource extends AudioWrapperSource {

  Uint8List bytes = Uint8List(0);

  AudioWrapperByteSource(Uint8List bytes){
    this.bytes = bytes;
  }

}

class AudioWrapperAssetSource extends AudioWrapperSource {

  String assetPath = "";

  AudioWrapperAssetSource(String assetPath){
    this.assetPath = assetPath;
  }

}

class _ByteSource extends justaudio.StreamAudioSource {
  final List<int> bytes;
  _ByteSource(this.bytes);

  @override
  Future<justaudio.StreamAudioResponse> request([int? start, int? end]) async {
    start ??= 0;
    end ??= bytes.length;
    return justaudio.StreamAudioResponse(
      sourceLength: bytes.length,
      contentLength: end - start,
      offset: start,
      stream: Stream.value(bytes.sublist(start, end)),
      contentType: 'audio/mpeg',
    );
  }
}