deepvoice_client/lib/modules/translation/controllers/translation_history_controller.dart

import 'package:get/get.dart';
import 'package:intl/intl.dart';
import '../controllers/translation_controller.dart';

class TranslationHistoryController extends GetxController {
  // 引用主翻译控制器，以访问历史记录数据
  final TranslationController translationController = Get.find<TranslationController>();
  
  // 按日期分组的历史记录
  final Rx<Map<String, List<TranslationItem>>> groupedHistory = Rx<Map<String, List<TranslationItem>>>({});
  
  // 排序后的日期列表
  final RxList<String> sortedDates = <String>[].obs;
  
  // 会话映射表，用于存储每个会话的所有项目
  final Rx<Map<String, List<TranslationItem>>> sessionMap = Rx<Map<String, List<TranslationItem>>>({});
  
  @override
  void onInit() {
    super.onInit();
    // 监听翻译历史记录的变化
    ever(translationController.translationHistory, (_) {
      _groupHistoryByDate();
      _groupHistoryBySession();
    });
    
    // 初始分组
    _groupHistoryByDate();
    _groupHistoryBySession();
  }
  
  // 按日期对历史记录进行分组
  void _groupHistoryByDate() {
    final Map<String, List<TranslationItem>> newGroupedHistory = {};
    
    // 筛选出每个会话的第一条记录
    final List<TranslationItem> firstItemsOfSessions = translationController.translationHistory
        .where((item) => item.isFirstInSession)
        .toList();
    
    for (var item in firstItemsOfSessions) {
      final DateTime date = item.timestamp;
      String key;
      
      final now = DateTime.now();
      final today = DateTime(now.year, now.month, now.day);
      final yesterday = today.subtract(const Duration(days: 1));
      final twoDaysAgo = today.subtract(const Duration(days: 2));
      final itemDate = DateTime(date.year, date.month, date.day);
      
      if (itemDate == today) {
        key = 'TODAY';
      } else if (itemDate == yesterday) {
        key = '1 DAY AGO';
      } else if (itemDate == twoDaysAgo) {
        key = '2 DAYS AGO';
      } else {
        key = DateFormat('yyyy-MM-dd').format(date);
      }
      
      if (!newGroupedHistory.containsKey(key)) {
        newGroupedHistory[key] = [];
      }
      
      newGroupedHistory[key]!.add(item);
    }
    
    // 对每个日期组内的项目按时间倒序排序
    newGroupedHistory.forEach((key, items) {
      items.sort((a, b) => b.timestamp.compareTo(a.timestamp));
    });
    
    // 更新分组后的历史记录
    groupedHistory.value = newGroupedHistory;
    
    // 按日期排序
    final List<String> dates = newGroupedHistory.keys.toList()
      ..sort((a, b) {
        if (a == 'TODAY') return -1;
        if (b == 'TODAY') return 1;
        if (a == '1 DAY AGO') return -1;
        if (b == '1 DAY AGO') return 1;
        if (a == '2 DAYS AGO') return -1;
        if (b == '2 DAYS AGO') return 1;
        return b.compareTo(a); // 降序排列其他日期
      });
    
    sortedDates.value = dates;
  }
  
  // 按会话ID对历史记录进行分组
  void _groupHistoryBySession() {
    final Map<String, List<TranslationItem>> newSessionMap = {};
    
    for (var item in translationController.translationHistory) {
      if (!newSessionMap.containsKey(item.sessionId)) {
        newSessionMap[item.sessionId] = [];
      }
      
      newSessionMap[item.sessionId]!.add(item);
    }
    
    // 对每个会话内的项目按时间升序排序
    newSessionMap.forEach((key, items) {
      items.sort((a, b) => a.timestamp.compareTo(b.timestamp));
    });
    
    // 更新会话映射表
    sessionMap.value = newSessionMap;
  }
  
  // 获取指定会话的所有翻译项
  List<TranslationItem> getSessionItems(String sessionId) {
    return sessionMap.value[sessionId] ?? [];
  }
  
  // 播放翻译项
  void playTranslationItem(TranslationItem item) {
    translationController.playTranslationItem(item);
  }
  
  // 播放指定文本
  void playText(String text) {
    translationController.playTranslatedText(text);
  }
  
  // 检查是否有历史记录
  bool get hasHistory => translationController.translationHistory.isNotEmpty;
}