import 'fixed_time_alarm.dart';
import 'location_alarm.dart';
import 'relative_time_alarm.dart';

abstract class Alarm {
  String get id;
  AlarmType get alarmType;
  Map<String, dynamic> toJson();

  factory Alarm.fromJson(Map<String, dynamic> json) {
    if (json.containsKey('alarmType')) {
      switch (AlarmType.fromJson(json['alarmType'])) {
        case AlarmType.timeFixed:
          return FixedTimeAlarm.fromJson(json);
        case AlarmType.timeRelative:
          return RelativeTimeAlarm.fromJson(json);
        case AlarmType.location:
          return LocationAlarm.fromJson(json);
      }
    }

    throw ArgumentError('Unknown alarm type');
  }

  @override
  bool operator ==(Object other) {
    if (other is! Alarm) return false;

    return hashCode == other.hashCode;
  }

  @override
  int get hashCode => id.hashCode;
}

enum AlarmType {
  timeFixed,
  timeRelative,
  location;

  String toJson() => name;
  static AlarmType fromJson(String json) => values.byName(json);
}