import 'package:get/get.dart';
import '../../../data/services/language_manager.dart';

/// 翻译项模型
/// 表示一条翻译记录的完整信息
class TranslationItem {
  String sourceText;
  String translatedText;
  String sourceLanguageCode;
  String targetLanguageCode;
  final DateTime timestamp;
  String sessionId;
  final bool isFirstInSession;
  bool isIntermediate; // 是否为中间结果

  TranslationItem({
    required this.sourceText,
    required this.translatedText,
    required this.sourceLanguageCode,
    required this.targetLanguageCode,
    required this.timestamp,
    required this.sessionId,
    this.isFirstInSession = false,
    this.isIntermediate = false,
  });

  /// 从JSON创建TranslationItem实例
  factory TranslationItem.fromJson(Map<String, dynamic> json) {
    DateTime timestamp;
    try {
      timestamp = DateTime.parse(json['timestamp']);
    } catch (e) {
      timestamp = DateTime.now();
    }

    return TranslationItem(
      sourceText: json['sourceText'] ?? '',
      translatedText: json['translatedText'] ?? '',
      sourceLanguageCode: json['sourceLanguageCode'] ?? 'zh-CN',
      targetLanguageCode: json['targetLanguageCode'] ?? 'en-US',
      timestamp: timestamp,
      sessionId:
          json['sessionId'] ?? DateTime.now().millisecondsSinceEpoch.toString(),
      isFirstInSession: json['isFirstInSession'] ?? false,
      isIntermediate: false, // 从存储加载的都是最终结果
    );
  }

  /// 转换为JSON格式
  Map<String, dynamic> toJson() {
    return {
      'sourceText': sourceText,
      'translatedText': translatedText,
      'sourceLanguageCode': sourceLanguageCode,
      'targetLanguageCode': targetLanguageCode,
      'timestamp': timestamp.toIso8601String(),
      'sessionId': sessionId,
      'isFirstInSession': isFirstInSession,
      // 不保存isIntermediate，因为存储的都是最终结果
    };
  }

  /// 获取源语言的中文名称
  String get sourceLanguageName {
    final languageManager = Get.find<LanguageManager>();
    return languageManager.getChineseNameByAsrCode(sourceLanguageCode) ??
        'meetingUnknownLanguage'.tr; // 对应中文：未知语言
  }

  /// 获取目标语言的中文名称
  String get targetLanguageName {
    final languageManager = Get.find<LanguageManager>();
    return languageManager.getChineseNameByAsrCode(targetLanguageCode) ??
        'meetingUnknownLanguage'.tr; // 对应中文：未知语言
  }
}