class VoiceSession {
  final String id;
  final String userId;
  final String? title;
  final String status;
  final int messageCount;
  final DateTime createdAt;
  final DateTime updatedAt;

  VoiceSession({
    required this.id,
    required this.userId,
    this.title,
    required this.status,
    this.messageCount = 0,
    required this.createdAt,
    required this.updatedAt,
  });

  factory VoiceSession.fromJson(Map<String, dynamic> json) => VoiceSession(
        id: json['id'] as String,
        userId: json['user_id'] as String,
        title: json['title'] as String?,
        status: json['status'] as String? ?? 'active',
        messageCount: json['message_count'] as int? ?? 0,
        createdAt: DateTime.parse(json['created_at'] as String),
        updatedAt: DateTime.parse(json['updated_at'] as String),
      );
}

class VoiceCommand {
  final String id;
  final String sessionId;
  final String command;
  final String? result;
  final DateTime createdAt;

  VoiceCommand({
    required this.id,
    required this.sessionId,
    required this.command,
    this.result,
    required this.createdAt,
  });

  factory VoiceCommand.fromJson(Map<String, dynamic> json) => VoiceCommand(
        id: json['id'] as String,
        sessionId: json['session_id'] as String,
        command: json['command'] as String,
        result: json['result'] as String?,
        createdAt: DateTime.parse(json['created_at'] as String),
      );
}

class TranscribeRequest {
  final String audioBase64;
  final String? sessionId;

  TranscribeRequest({required this.audioBase64, this.sessionId});

  Map<String, dynamic> toJson() => {
        'audio_base64': audioBase64,
        if (sessionId != null) 'session_id': sessionId,
      };
}

class TranscribeResponse {
  final String text;
  final String? sessionId;

  TranscribeResponse({required this.text, this.sessionId});

  factory TranscribeResponse.fromJson(Map<String, dynamic> json) =>
      TranscribeResponse(
        text: json['text'] as String,
        sessionId: json['session_id'] as String?,
      );
}