import 'package:get/get.dart';
import 'package:flutter/material.dart';
import '../../../data/services/translation_usage_service.dart';
import '../../../core/utils/logger.dart';

/// 翻译成本配置控制器
class TranslationCostController extends GetxController {
  // 依赖注入
  final TranslationUsageService _usageService = Get.find<TranslationUsageService>();
  
  // 成本配置
  final RxMap<String, double> costConfig = <String, double>{}.obs;
  final RxDouble dailyCostThreshold = 10.0.obs;
  final RxDouble monthlyCostThreshold = 300.0.obs;
  
  // 表单控制器
  final translationCostController = TextEditingController();
  final asrCostController = TextEditingController();
  final ttsCostController = TextEditingController();
  final aiSummaryCostController = TextEditingController();
  final dailyThresholdController = TextEditingController();
  final monthlyThresholdController = TextEditingController();
  
  // 状态变量
  final isLoading = false.obs;
  final isSaving = false.obs;

  @override
  void onInit() {
    super.onInit();
    _loadCurrentConfig();
  }

  @override
  void onClose() {
    // 释放控制器
    translationCostController.dispose();
    asrCostController.dispose();
    ttsCostController.dispose();
    aiSummaryCostController.dispose();
    dailyThresholdController.dispose();
    monthlyThresholdController.dispose();
    super.onClose();
  }

  /// 加载当前配置
  void _loadCurrentConfig() {
    isLoading.value = true;
    
    try {
      // 从服务获取当前配置
      costConfig.value = Map<String, double>.from(_usageService.costConfig);
      dailyCostThreshold.value = _usageService.dailyCostThreshold.value;
      monthlyCostThreshold.value = _usageService.monthlyCostThreshold.value;
      
      // 更新表单控制器
      translationCostController.text = (costConfig['translation_per_1k_chars'] ?? 0.05).toString();
      asrCostController.text = (costConfig['asr_per_minute'] ?? 0.02).toString();
      ttsCostController.text = (costConfig['tts_per_1k_chars'] ?? 0.03).toString();
      aiSummaryCostController.text = (costConfig['ai_summary_per_request'] ?? 0.01).toString();
      dailyThresholdController.text = dailyCostThreshold.value.toString();
      monthlyThresholdController.text = monthlyCostThreshold.value.toString();
      
      Logger.info('成本配置加载完成');
    } catch (e) {
      Logger.error('加载成本配置失败: $e');
      _showErrorSnackbar('加载配置失败');
    } finally {
      isLoading.value = false;
    }
  }

  /// 保存配置
  Future<void> saveConfig() async {
    if (isSaving.value) return;
    
    isSaving.value = true;
    
    try {
      // 验证输入
      if (!_validateInputs()) {
        return;
      }
      
      // 更新成本配置
      final newCostConfig = {
        'translation_per_1k_chars': double.parse(translationCostController.text),
        'asr_per_minute': double.parse(asrCostController.text),
        'tts_per_1k_chars': double.parse(ttsCostController.text),
        'ai_summary_per_request': double.parse(aiSummaryCostController.text),
      };
      
      final newDailyThreshold = double.parse(dailyThresholdController.text);
      final newMonthlyThreshold = double.parse(monthlyThresholdController.text);
      
      // 保存到服务
      _usageService.updateCostConfig(newCostConfig);
      _usageService.updateThresholds(
        dailyThreshold: newDailyThreshold,
        monthlyThreshold: newMonthlyThreshold,
      );
      
      // 更新本地状态
      costConfig.value = newCostConfig;
      dailyCostThreshold.value = newDailyThreshold;
      monthlyCostThreshold.value = newMonthlyThreshold;
      
      _showSuccessSnackbar('配置保存成功');
      Logger.info('成本配置保存成功');
      
    } catch (e) {
      Logger.error('保存成本配置失败: $e');
      _showErrorSnackbar('保存配置失败');
    } finally {
      isSaving.value = false;
    }
  }

  /// 重置为默认配置
  void resetToDefault() {
    translationCostController.text = '0.05';
    asrCostController.text = '0.02';
    ttsCostController.text = '0.03';
    aiSummaryCostController.text = '0.01';
    dailyThresholdController.text = '10.0';
    monthlyThresholdController.text = '300.0';
    
    _showInfoSnackbar('已重置为默认配置，请点击保存生效');
  }

  /// 验证输入
  bool _validateInputs() {
    try {
      final translationCost = double.parse(translationCostController.text);
      final asrCost = double.parse(asrCostController.text);
      final ttsCost = double.parse(ttsCostController.text);
      final aiSummaryCost = double.parse(aiSummaryCostController.text);
      final dailyThreshold = double.parse(dailyThresholdController.text);
      final monthlyThreshold = double.parse(monthlyThresholdController.text);
      
      if (translationCost < 0 || asrCost < 0 || ttsCost < 0 || aiSummaryCost < 0) {
        _showErrorSnackbar('成本不能为负数');
        return false;
      }
      
      if (dailyThreshold < 0 || monthlyThreshold < 0) {
        _showErrorSnackbar('预警阈值不能为负数');
        return false;
      }
      
      if (dailyThreshold > monthlyThreshold) {
        _showErrorSnackbar('日预警阈值不能大于月预警阈值');
        return false;
      }
      
      return true;
    } catch (e) {
      _showErrorSnackbar('请输入有效的数字');
      return false;
    }
  }

  /// 计算预估月成本
  double calculateEstimatedMonthlyCost() {
    try {
      final dailyStats = _usageService.todayStats.value;
      if (dailyStats.estimatedCost == 0) return 0.0;
      
      // 简单按30天计算
      return dailyStats.estimatedCost * 30;
    } catch (e) {
      Logger.error('计算预估月成本失败: $e');
      return 0.0;
    }
  }

  /// 获取成本节约建议
  List<String> getCostSavingTips() {
    final tips = <String>[];
    
    try {
      final dailyStats = _usageService.todayStats.value;
      
      // 基于使用情况给出建议
      if (dailyStats.translationApiCalls > 100) {
        tips.add('考虑批量翻译以减少API调用次数');
      }
      
      if (dailyStats.ttsApiCalls > 50) {
        tips.add('可以关闭自动语音播放以节省TTS成本');
      }
      
      if (dailyStats.aiSummaryApiCalls > 10) {
        tips.add('AI摘要功能按需使用，避免频繁调用');
      }
      
      if (dailyStats.effectiveAudioDuration > 3600) { // 超过1小时
        tips.add('长时间录音会增加ASR成本，建议分段录音');
      }
      
      if (tips.isEmpty) {
        tips.add('您的使用习惯很好，继续保持！');
      }
      
    } catch (e) {
      Logger.error('获取成本节约建议失败: $e');
      tips.add('暂无建议');
    }
    
    return tips;
  }

  /// 显示成功提示
  void _showSuccessSnackbar(String message) {
    Get.snackbar(
      '成功',
      message,
      snackPosition: SnackPosition.TOP,
      backgroundColor: Get.theme.colorScheme.primary.withOpacity(0.1),
      colorText: Get.theme.colorScheme.primary,
      duration: const Duration(seconds: 3),
    );
  }

  /// 显示错误提示
  void _showErrorSnackbar(String message) {
    Get.snackbar(
      '错误',
      message,
      snackPosition: SnackPosition.TOP,
      backgroundColor: Get.theme.colorScheme.error.withOpacity(0.1),
      colorText: Get.theme.colorScheme.error,
      duration: const Duration(seconds: 3),
    );
  }

  /// 显示信息提示
  void _showInfoSnackbar(String message) {
    Get.snackbar(
      '提示',
      message,
      snackPosition: SnackPosition.TOP,
      backgroundColor: Get.theme.colorScheme.surface.withOpacity(0.9),
      colorText: Get.theme.colorScheme.onSurface,
      duration: const Duration(seconds: 3),
    );
  }

  /// 格式化成本显示
  String formatCost(double cost) {
    return '¥${cost.toStringAsFixed(2)}';
  }

  /// 格式化百分比显示
  String formatPercentage(double percentage) {
    return '${percentage.toStringAsFixed(1)}%';
  }
}