import '../state/app_interaction_state.dart';

abstract class UserStateRepository {
  Future<bool> isLoggedIn();
  Future<void> login(LoginMethod method);
  Future<void> logout();

  Future<Set<String>> getFavorites();
  Future<void> toggleFavorite(String reportId);

  Future<Set<String>> getSavedListens();
  Future<void> toggleSavedListen(String reportId);

  Future<List<String>> getHistory();
  Future<void> addHistory(String reportId);

  Future<Map<String, double>> getAudioProgress();
  Future<void> saveAudioProgress(String audioId, double seconds);
}

class MemoryUserStateRepository implements UserStateRepository {
  bool _loggedIn = false;
  final Set<String> _favorites = {};
  final Set<String> _savedListens = {};
  final List<String> _history = [];
  final Map<String, double> _audioProgress = {};

  @override
  Future<bool> isLoggedIn() async => _loggedIn;

  @override
  Future<void> login(LoginMethod method) async {
    _loggedIn = true;
  }

  @override
  Future<void> logout() async {
    _loggedIn = false;
  }

  @override
  Future<Set<String>> getFavorites() async => {..._favorites};

  @override
  Future<void> toggleFavorite(String reportId) async {
    if (!_favorites.add(reportId)) {
      _favorites.remove(reportId);
    }
  }

  @override
  Future<Set<String>> getSavedListens() async => {..._savedListens};

  @override
  Future<void> toggleSavedListen(String reportId) async {
    if (!_savedListens.add(reportId)) {
      _savedListens.remove(reportId);
    }
  }

  @override
  Future<List<String>> getHistory() async => [..._history];

  @override
  Future<void> addHistory(String reportId) async {
    _history.remove(reportId);
    _history.insert(0, reportId);
    if (_history.length > 40) {
      _history.removeRange(40, _history.length);
    }
  }

  @override
  Future<Map<String, double>> getAudioProgress() async => {..._audioProgress};

  @override
  Future<void> saveAudioProgress(String audioId, double seconds) async {
    _audioProgress[audioId] = seconds < 0 ? 0 : seconds;
  }
}