class Message {
  final String id;
  final String fromUser;
  final String toUser;
  final String content;
  final bool isRead;
  final DateTime createdAt;

  Message({
    required this.id,
    required this.fromUser,
    required this.toUser,
    required this.content,
    required this.isRead,
    required this.createdAt,
  });

  factory Message.fromMap(Map<String, dynamic> map) {
    return Message(
      id: map['id'] ?? '',
      fromUser: map['from_user'] ?? '',
      toUser: map['to_user'] ?? '',
      content: map['content'] ?? '',
      isRead: map['is_read'] ?? false,
      createdAt: DateTime.tryParse(map['created_at'] ?? '') ?? DateTime.now(),
    );
  }

  Map<String, dynamic> toMap() {
    return {
      'from_user': fromUser,
      'to_user': toUser,
      'content': content,
      'is_read': isRead,
    };
  }
}