import 'dart:convert';
import 'dart:math';

import 'package:ef/base/getx/getx.dart';
import 'package:ef/ef.dart';
import 'package:flutter/services.dart';
import 'package:json_annotation/json_annotation.dart';
import 'package:vbvs_app/controller/setting/language/language_controller.dart';
import 'package:vbvs_app/language/AppLanguage.dart';
part 'city.g.dart';

@JsonSerializable()
class CityModel {
  int? id; // 城市id
  String? value; // 显示值（国家/省份/城市名称）
  String? label; // 标签（通常与value相同）
  String? country; // 国家名称
  String? province; // 省份名称
  String? city; // 城市名称
  String? UTC; // 时区
  List<CityModel>? children;

  @JsonKey(ignore: true)
  String? keyword = "";
  @JsonKey(ignore: true)
  Color? color = Color(0xFFFFFFFF);

  CityModel({
    this.id,
    this.value,
    this.label,
    this.country,
    this.province,
    this.city,
    this.UTC,
    this.children,
  });

  // 从JSON反序列化时的异常处理
  factory CityModel.fromJson(Map<String, dynamic> json) {
    try {
      return _$CityModelFromJson(json);
    } catch (e) {
      print('Error parsing CityModel: $e');
      return CityModel(); // 返回空的CityModel
    }
  }

  // 序列化为JSON时的异常处理
  Map<String, dynamic> toJson() => _$CityModelToJson(this);

  // 获取显示名称（根据层级显示）
  String get displayName {
    if (city != null && city!.isNotEmpty) {
      // 三级：国家-省份-城市
      return '${country ?? ''}-${province ?? ''}-${city ?? value ?? ''}';
    } else if (province != null && province!.isNotEmpty) {
      // 二级：国家-省份
      return '${country ?? ''}-${province ?? value ?? ''}';
    } else {
      // 一级：国家
      return country ?? value ?? '';
    }
  }
}

class CityModelController extends GetControllerEx<CityModel> {
  List<CityModel> cityList = [];
  LanguageController languageController = Get.find();
  RxInt tmp = 1.obs;
  RxBool isLoading = false.obs;
  List<String>? searchResults = []; // 新增：搜索结果列表

  CityModelController() {
    attr = GetModel(CityModel()).obs;
  }

  // 加载城市数据并赋值给cityList
  Future<void> loadAndSetCityData() async {
    try {
      isLoading.value = true;
      ef.log("开始加载城市数据...");

      final data = await _loadCityData();
      cityList = data;

      ef.log("城市数据加载完成，共${cityList.length}个国家");
      if (cityList.isNotEmpty) {
        // 打印前几个国家用于调试
        for (var i = 0; i < min(3, cityList.length); i++) {
          final country = cityList[i];
          ef.log(
              "国家: ${country.value}, 省份数量: ${country.children?.length ?? 0}");
        }
      }

      update();
    } catch (e) {
      ef.log("加载城市数据失败：$e");
    } finally {
      isLoading.value = false;
    }
  }

  // 内部加载方法
  Future<List<CityModel>> _loadCityData() async {
    try {
      // 获取当前语言代码
      String currentLanguageCode = AppLanguage().getCurrentLanguageCode();

      // 根据当前语言代码构建文件名
      final String fileName = 'assets/city/city_$currentLanguageCode.json';

      // 读取对应语言的JSON文件
      final String jsonString = await rootBundle.loadString(fileName);

      // 解析JSON数据并转换为 CityModel 列表
      final List<dynamic> jsonList = jsonDecode(jsonString);

      // 将 Map 转换为 CityModel
      return jsonList.map((json) => CityModel.fromJson(json)).toList();
    } catch (e) {
      ef.log("_loadCityData 失败：$e");
      return [];
    }
  }

  // 根据ID查找城市（支持国家、省份、城市所有层级）
  CityModel? findCityById(String id) {
    if (cityList.isEmpty) {
      ef.log("cityList为空，无法查找城市，请先调用 loadAndSetCityData()");
      return null;
    }

    final int? targetId = int.tryParse(id);
    if (targetId == null) {
      ef.log("ID格式错误：$id");
      return null;
    }

    ef.log("开始查找ID为 $targetId 的城市数据...");

    // 遍历三级结构
    for (var country in cityList) {
      // 检查国家
      if (country.id == targetId) {
        ef.log("找到匹配的国家: ${country.value}");
        return CityModel(
          id: country.id,
          value: country.value,
          label: country.label,
          country: country.value,
          province: null,
          city: null,
          UTC: country.UTC,
        );
      }

      // 检查省份
      for (var province in country.children ?? []) {
        if (province.id == targetId) {
          ef.log("找到匹配的省份: ${province.value}, 国家: ${country.value}");
          return CityModel(
            id: province.id,
            value: province.value,
            label: province.label,
            country: country.value,
            province: province.value,
            city: null,
            UTC: province.UTC,
          );
        }

        // 检查城市
        for (var city in province.children ?? []) {
          if (city.id == targetId) {
            ef.log(
                "找到匹配的城市: ${city.value}, 省份: ${province.value}, 国家: ${country.value}");
            return CityModel(
              id: city.id,
              value: city.value,
              label: city.label,
              country: country.value,
              province: province.value,
              city: city.value,
              UTC: city.UTC,
            );
          }
        }
      }
    }

    ef.log("未找到ID为 $targetId 的城市数据");
    return null;
  }

  // 根据名称查找城市
  CityModel? findCityByName(
      String countryName, String provinceName, String cityName) {
    if (cityList.isEmpty) {
      ef.log("cityList为空，无法查找城市");
      return null;
    }

    for (var country in cityList) {
      if (country.value == countryName) {
        for (var province in country.children ?? []) {
          if (province.value == provinceName) {
            for (var city in province.children ?? []) {
              if (city.value == cityName) {
                return city;
              }
            }
          }
        }
      }
    }
    return null;
  }

  // 检查是否已加载数据
  bool get isDataLoaded => cityList.isNotEmpty;

  // void searchCities(String keyword) {
  //   model.keyword = keyword;
  //   searchResults?.clear();

  //   if (keyword.isEmpty) {
  //     return;
  //   }

  //   final keywordLower = keyword.toLowerCase();

  //   // 遍历所有城市数据
  //   for (var country in cityList) {
  //     final countryName = country.value ?? country.country ?? '';

  //     for (var province in country.children ?? []) {
  //       final provinceName = province.value ?? province.province ?? '';

  //       for (var city in province.children ?? []) {
  //         final cityName = city.value ?? city.city ?? '';
  //         final displayName = '$countryName-$provinceName-$cityName';

  //         // 模糊匹配
  //         if (countryName.toLowerCase().contains(keywordLower) ||
  //             provinceName.toLowerCase().contains(keywordLower) ||
  //             cityName.toLowerCase().contains(keywordLower) ||
  //             displayName.toLowerCase().contains(keywordLower)) {
  //           searchResults?.add(displayName);
  //         }
  //       }
  //     }
  //   }
  // }

  void searchCities(String keyword) {
    model.keyword = keyword;
    searchResults?.clear();

    if (keyword.isEmpty) {
      return;
    }

    final keywordLower = keyword.toLowerCase();

    for (var country in cityList) {
      final countryName = country.value ?? country.country ?? '';

      // 如果该国家没有 children（一级结构）
      if (country.children == null || country.children!.isEmpty) {
        final name = countryName;
        if (name.toLowerCase().contains(keywordLower)) {
          searchResults?.add(name);
        }
        continue;
      }

      // 二层循环：省份或城市
      for (var province in country.children!) {
        final provinceName = province.value ?? province.province ?? '';
        final level2Name = '$countryName-$provinceName';

        // 省本身是否匹配（适用于 国家→省 二级结构）
        if (province.children == null || province.children!.isEmpty) {
          if (countryName.toLowerCase().contains(keywordLower) ||
              provinceName.toLowerCase().contains(keywordLower) ||
              level2Name.toLowerCase().contains(keywordLower)) {
            searchResults?.add(level2Name);
          }
          continue;
        }

        // 有第三级城市 → 遍历城市
        for (var city in province.children!) {
          final cityName = city.value ?? city.city ?? '';
          final level3Name = '$countryName-$provinceName-$cityName';

          if (countryName.toLowerCase().contains(keywordLower) ||
              provinceName.toLowerCase().contains(keywordLower) ||
              cityName.toLowerCase().contains(keywordLower) ||
              level3Name.toLowerCase().contains(keywordLower)) {
            searchResults?.add(level3Name);
          }
        }
      }
    }
  }

  // 根据显示名称获取对应的 CityModel
  // CityModel? getCityByDisplayName(String displayName) {
  //   final parts = displayName.split('-');
  //   if (parts.length != 3) return null;

  //   final countryName = parts[0];
  //   final provinceName = parts[1];
  //   final cityName = parts[2];

  //   for (var country in cityList) {
  //     if ((country.value ?? country.country ?? '') == countryName) {
  //       for (var province in country.children ?? []) {
  //         if ((province.value ?? province.province ?? '') == provinceName) {
  //           for (var city in province.children ?? []) {
  //             if ((city.value ?? city.city ?? '') == cityName) {
  //               return city;
  //             }
  //           }
  //         }
  //       }
  //     }
  //   }
  //   return null;
  // }
  CityModel? getCityByDisplayName(String displayName) {
    final parts = displayName.split('-');

    if (parts.isEmpty) return null;

    final countryName = parts[0];
    final provinceName = parts.length >= 2 ? parts[1] : null;
    final cityName = parts.length >= 3 ? parts[2] : null;

    for (var country in cityList) {
      final cName = country.value ?? country.country ?? '';
      if (cName != countryName) continue;

      // 一级结构：直接 return 国家
      if (provinceName == null) {
        return country;
      }

      // 如果没有 children，就不可能有省或市
      if (country.children == null || country.children!.isEmpty) {
        return null;
      }

      // 二级匹配：省或城市
      for (var province in country.children!) {
        final pName = province.value ?? province.province ?? '';
        if (pName != provinceName) continue;

        // 二级结构：国家-省
        if (cityName == null) {
          return province;
        }

        // 有城市才继续
        if (province.children == null || province.children!.isEmpty) {
          return null;
        }

        // 三级结构：国家-省-市
        for (var city in province.children!) {
          final ciName = city.value ?? city.city ?? '';
          if (ciName == cityName) {
            return city;
          }
        }
      }
    }

    return null;
  }
}