class TimeGoal {
  final int? id;
  final String goalType; // 'daily_total' 或 'daily_category'
  final String? category; // 如果是分类目标，指定分类
  final int targetTime; // 目标时长（秒）
  final bool isActive;
  final DateTime createdAt;
  final DateTime updatedAt;

  TimeGoal({
    this.id,
    required this.goalType,
    this.category,
    required this.targetTime,
    this.isActive = true,
    required this.createdAt,
    required this.updatedAt,
  });

  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'goal_type': goalType,
      'category': category,
      'target_time': targetTime,
      'is_active': isActive ? 1 : 0,
      'created_at': createdAt.millisecondsSinceEpoch ~/ 1000,
      'updated_at': updatedAt.millisecondsSinceEpoch ~/ 1000,
    };
  }

  factory TimeGoal.fromMap(Map<String, dynamic> map) {
    return TimeGoal(
      id: map['id'] as int?,
      goalType: map['goal_type'] as String,
      category: map['category'] as String?,
      targetTime: map['target_time'] as int,
      isActive: (map['is_active'] as int) == 1,
      createdAt: DateTime.fromMillisecondsSinceEpoch((map['created_at'] as int) * 1000),
      updatedAt: DateTime.fromMillisecondsSinceEpoch((map['updated_at'] as int) * 1000),
    );
  }

  // 格式化目标时长
  String get formattedTargetTime {
    final hours = targetTime ~/ 3600;
    final minutes = (targetTime % 3600) ~/ 60;
    if (hours > 0) {
      return '${hours}小时${minutes}分钟';
    }
    return '${minutes}分钟';
  }
}