/// 直播间聊天消息模型
class LiveChatMessage {
  final String userId;
  final String userName;
  final String? avatar;
  final String content;
  final int timestamp;

  LiveChatMessage({
    required this.userId,
    required this.userName,
    this.avatar,
    required this.content,
    required this.timestamp,
  });

  factory LiveChatMessage.fromJson(Map<String, dynamic> json) {
    return LiveChatMessage(
      userId: json['userId'] ?? json['uid'] ?? '',
      userName: json['userName'] ?? json['nickName'] ?? '用户',
      avatar: json['avatar'] ?? json['profilePhoto'],
      content: json['content'] ?? json['message'] ?? '',
      timestamp: json['timestamp'] ?? DateTime.now().millisecondsSinceEpoch,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'userId': userId,
      'userName': userName,
      'avatar': avatar,
      'content': content,
      'timestamp': timestamp,
    };
  }
}