cpd_2022_zi/lib/providers/workout_provider.dart

import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/material.dart';
import 'package:smoke_cess_app/providers/timer_provider.dart';

class WorkoutProvider extends ChangeNotifier {
  TimerProvider timerProvider;

  final AudioPlayer _audioPlayer = AudioPlayer();
  final Source _finishedSoundSource = AssetSource('finish.mp3');
  final Source _beepSoundSource = AssetSource('beep.mp3');
  bool isWorkoutStarted = false;
  bool isMuted = false;

  void mutePlayer() {
    isMuted = true;
    _audioPlayer.setVolume(0);
    notifyListeners();
  }

  void unMutePlayer() {
    isMuted = false;
    _audioPlayer.setVolume(1);
    notifyListeners();
  }

  WorkoutProvider(this.timerProvider);

  //TODO: outsource all Maps to JSON File!
  final List<String> _workoutPhases = [
    'Warm-Up',
    'High Intensity',
    'Low Intensity',
    'High Intensity',
    'Low Intensity',
    'High Intensity',
    'Low Intensity',
    'High Intensity',
    'Cool-down'
  ];
  final Map<String, Duration> _phasesDuration = {
    'Warm-Up': const Duration(seconds: 5),
    'High Intensity': const Duration(seconds: 4),
    'Low Intensity': const Duration(seconds: 3),
    'Cool-down': const Duration(seconds: 5)
  };
  final Map<String, Source> _phaseSongSources = {
    'Warm-Up': AssetSource('warmUp.mp3'),
    'High Intensity': AssetSource('workout.mp3'),
    'Low Intensity': AssetSource('workout.mp3'),
    'Cool-down': AssetSource('cool_down.mp3')
  };
  final Map<String, Color> _phaseColors = {
    'Warm-Up': Colors.green,
    'High Intensity': Colors.red,
    'Low Intensity': Colors.orange,
    'Cool-down': Colors.blue
  };
  int _workoutPhaseIndex = 0;

  String get currentPhase => _workoutPhases[_workoutPhaseIndex];
  Duration get currentPhaseDuration =>
      _phasesDuration[currentPhase] ?? const Duration(seconds: 0);
  bool get isPhaseComplete =>
      timerProvider.elapsedSeconds - currentPhaseDuration.inSeconds == 0;
  Color get currentPhaseColor => _phaseColors[currentPhase] ?? Colors.blue;

  void nextPhase() {
    _audioPlayer.stop();
    if (_workoutPhaseIndex < _workoutPhases.length - 1) {
      _audioPlayer.play(_beepSoundSource);
      _workoutPhaseIndex += 1;
      _audioPlayer.onPlayerComplete.listen((event) {
        _audioPlayer.play(_phaseSongSources[currentPhase]!);
        timerProvider.startTimer(currentPhaseDuration);
      });
    } else {
      _audioPlayer.play(_finishedSoundSource);
      stopWorkout();
    }
  }

  void startWorkout() {
    isWorkoutStarted = true;
    _audioPlayer.play(_beepSoundSource);
    _audioPlayer.onPlayerComplete.listen((event) {
      _audioPlayer.play(_phaseSongSources[currentPhase]!);
      timerProvider.startTimer(currentPhaseDuration);
    });
  }

  void stopWorkout() {
    isWorkoutStarted = false;
    _workoutPhaseIndex = 0;
    _audioPlayer.stop();
    timerProvider.stopTimer();
    notifyListeners();
  }
}