/// 时间: 2026-03-29
/// 功能: 投票API服务
/// 介绍: 专门处理投票相关的API请求，包括获取投票列表、投票详情、提交投票等功能
/// 最新变化: 添加Cookie管理器支持PHP Session认证

import 'dart:convert';
import 'dart:io' as io show Platform;
import 'package:dio/dio.dart';
import 'package:dio_cookie_manager/dio_cookie_manager.dart';
import 'package:cookie_jar/cookie_jar.dart';
import 'package:platform_info/platform_info.dart';
import 'package:shared_preferences/shared_preferences.dart';

class VoteApi {
  static const String _baseUrl = 'https://poe.vogov.cn/toupiao/';
  static const String _voteEndpoint = 'vote_api.php';
  static const String _userEndpoint = 'tapi.php';
  static const Duration _timeout = Duration(seconds: 30);

  static final BaseOptions _options = BaseOptions(
    baseUrl: _baseUrl,
    connectTimeout: _timeout,
    receiveTimeout: _timeout,
    sendTimeout: _timeout,
    headers: {
      'Content-Type': 'application/json; charset=UTF-8',
      'Accept': 'application/json',
      'User-Agent': 'Poes-Flutter/1.0.0',
    },
  );

  static final CookieJar _cookieJar = CookieJar();
  static final Dio _dio = Dio(_options)
    ..interceptors.add(CookieManager(_cookieJar));

  static Future<Map<String, dynamic>> _get(
    String path, {
    Map<String, dynamic>? queryParameters,
  }) async {
    try {
      final url = '$_baseUrl$path';

      final response = await _dio.get(url, queryParameters: queryParameters);

      return response.data as Map<String, dynamic>;
    } on DioException catch (e) {
      throw Exception('请求失败: ${e.message}');
    } catch (e) {
      throw Exception('请求失败: $e');
    }
  }

  static Future<Map<String, dynamic>> _post(
    String path, {
    Map<String, dynamic>? data,
  }) async {
    try {
      final url = '$_baseUrl$path';

      final response = await _dio.post(url, data: data);

      return response.data as Map<String, dynamic>;
    } on DioException catch (e) {
      throw Exception('请求失败: ${e.message}');
    } catch (e) {
      throw Exception('请求失败: $e');
    }
  }

  /// 获取用户登录状态
  static Future<bool> isLoggedIn() async {
    final prefs = await SharedPreferences.getInstance();
    return prefs.getBool('vote_logged_in') ?? false;
  }

  /// 获取用户信息
  static Future<Map<String, dynamic>?> getUserInfo() async {
    final prefs = await SharedPreferences.getInstance();
    final userData = prefs.getString('vote_user');
    if (userData != null) {
      try {
        return jsonDecode(userData) as Map<String, dynamic>;
      } catch (e) {
        return null;
      }
    }
    return null;
  }

  /// 保存用户登录状态
  static Future<void> saveUserLogin(Map<String, dynamic> userData) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool('vote_logged_in', true);
    await prefs.setString('vote_user', jsonEncode(userData));
  }

  /// 清除用户登录状态
  static Future<void> clearUserLogin() async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.remove('vote_logged_in');
    await prefs.remove('vote_user');
  }

  /// 用户登录
  static Future<VoteApiResponse> login({
    required String username,
    required String password,
  }) async {
    final jsonData = await _post(
      _userEndpoint,
      data: {'act': 'login', 'username': username, 'password': password},
    );

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '登录失败');
    }

    final userData = jsonData['data'];
    if (userData != null) {
      await saveUserLogin(userData);
    }

    return VoteApiResponse.fromJson(jsonData);
  }

  /// 用户注册
  static Future<VoteApiResponse> register({
    required String username,
    required String password,
    String? userIdentifier,
  }) async {
    final data = <String, dynamic>{
      'act': 'register',
      'username': username,
      'password': password,
    };
    if (userIdentifier != null) {
      data['user_identifier'] = userIdentifier;
    }

    final jsonData = await _post(_userEndpoint, data: data);

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '注册失败');
    }

    return VoteApiResponse.fromJson(jsonData);
  }

  /// 获取投票列表
  static Future<VoteListResponse> getVoteList({
    int page = 1,
    int pageSize = 10,
    int status = 1,
    int type = -1,
  }) async {
    final jsonData = await _get(
      _voteEndpoint,
      queryParameters: {
        'act': 'getVoteList',
        'page': page.toString(),
        'pageSize': pageSize.toString(),
        'status': status.toString(),
        'type': type.toString(),
      },
    );

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '获取投票列表失败');
    }

    return VoteListResponse.fromJson(jsonData);
  }

  /// 获取投票详情
  static Future<VoteDetailResponse> getVoteDetail(int id) async {
    final jsonData = await _get(
      _voteEndpoint,
      queryParameters: {'act': 'getVoteDetail', 'id': id.toString()},
    );

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '获取投票详情失败');
    }

    return VoteDetailResponse.fromJson(jsonData);
  }

  /// 提交投票
  static Future<VoteApiResponse> submitVote({
    required int topicId,
    required List<int> options,
  }) async {
    final jsonData = await _post(
      _voteEndpoint,
      data: {'act': 'submitVote', 'topic_id': topicId, 'options': options},
    );

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '提交投票失败');
    }

    return VoteApiResponse.fromJson(jsonData);
  }

  /// 获取投票结果
  static Future<VoteResultResponse> getVoteResult(int id) async {
    final jsonData = await _get(
      _voteEndpoint,
      queryParameters: {'act': 'getVoteResult', 'id': id.toString()},
    );

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '获取投票结果失败');
    }

    return VoteResultResponse.fromJson(jsonData);
  }

  /// 获取用户投票记录
  static Future<VoteListResponse> getUserVotes({
    int page = 1,
    int pageSize = 10,
  }) async {
    final jsonData = await _get(
      _voteEndpoint,
      queryParameters: {
        'act': 'getUserVotes',
        'page': page.toString(),
        'pageSize': pageSize.toString(),
      },
    );

    if (jsonData['code'] != 0) {
      throw Exception(jsonData['msg'] ?? '获取用户投票记录失败');
    }

    return VoteListResponse.fromJson(jsonData);
  }

  /// 获取设备类型作为user_identifier
  static Future<String> getDeviceType() async {
    final platform = Platform.instance;

    bool isHarmonyOS = false;
    String platformName = 'Unknown';

    try {
      final String osName = io.Platform.operatingSystem;
      final String osVersion = io.Platform.operatingSystemVersion.toLowerCase();

      if (osName == 'ohos' ||
          osName == 'harmonyos' ||
          osName == 'openharmony') {
        platformName = 'HarmonyOS';
        isHarmonyOS = true;
      } else if (io.Platform.isAndroid) {
        platformName = 'Android';
        if (osVersion.contains('harmony') ||
            osVersion.contains('ohos') ||
            osVersion.contains('openharmony')) {
          platformName = 'HarmonyOS';
          isHarmonyOS = true;
        }
      } else if (io.Platform.isIOS) {
        platformName = 'iOS';
      } else if (io.Platform.isMacOS) {
        platformName = 'macOS';
      } else if (io.Platform.isWindows) {
        platformName = 'Windows';
      } else if (io.Platform.isLinux) {
        platformName = 'Linux';
      } else if (io.Platform.isFuchsia) {
        platformName = 'Fuchsia';
      } else {
        platformName = osName[0].toUpperCase() + osName.substring(1);
      }
    } catch (e) {
      platformName = switch (platform.operatingSystem) {
        const OperatingSystem.android() => 'Android',
        const OperatingSystem.fuchsia() => 'Fuchsia',
        const OperatingSystem.iOS() => 'iOS',
        const OperatingSystem.linux() => 'Linux',
        const OperatingSystem.macOS() => 'macOS',
        const OperatingSystem.windows() => 'Windows',
        const OperatingSystem.unknown() || _ => 'Unknown',
      };
    }

    String deviceType = 'Unknown';
    if (isHarmonyOS) {
      final String osName = io.Platform.operatingSystem;
      if (osName == 'ohos') {
        deviceType = 'OHOS';
      } else if (osName == 'harmonyos') {
        deviceType = 'HarmonyOS';
      } else if (osName == 'openharmony') {
        deviceType = 'OpenHarmony';
      } else {
        deviceType = 'HarmonyOS';
      }
    } else {
      deviceType =
          platform.when<String?>(
            mobile: () => 'Mobile',
            desktop: () => 'Desktop',
            js: () => 'Web',
            orElse: () => null,
          ) ??
          'Unknown';
    }

    return '$platformName-$deviceType-Flutter';
  }
}

/// 基础API响应
class VoteApiResponse {
  final int code;
  final String message;
  final dynamic data;

  VoteApiResponse({required this.code, required this.message, this.data});

  factory VoteApiResponse.fromJson(Map<String, dynamic> json) {
    return VoteApiResponse(
      code: json['code'] ?? 0,
      message: json['msg'] ?? '',
      data: json['data'],
    );
  }

  bool get isSuccess => code == 0;
}

/// 投票列表响应
class VoteListResponse {
  final List<VoteItem> list;
  final VotePagination pagination;

  VoteListResponse({required this.list, required this.pagination});

  factory VoteListResponse.fromJson(Map<String, dynamic> json) {
    final data = json['data'] as Map<String, dynamic>? ?? {};
    final listRaw = data['list'] as List? ?? [];
    final list = listRaw.map((item) => VoteItem.fromJson(item)).toList();
    final pagination = VotePagination.fromJson(
      data['pagination'] as Map<String, dynamic>? ?? {},
    );
    return VoteListResponse(list: list, pagination: pagination);
  }
}

/// 投票项
class VoteItem {
  final int id;
  final String title;
  final String? idesc;
  final int itype;
  final int maxtime;
  final int status;
  final int iview;
  final String addtime;
  final String statime;
  final String endtime;
  final String? statusText;
  final String? statusClass;

  VoteItem({
    required this.id,
    required this.title,
    this.idesc,
    required this.itype,
    required this.maxtime,
    required this.status,
    required this.iview,
    required this.addtime,
    required this.statime,
    required this.endtime,
    this.statusText,
    this.statusClass,
  });

  factory VoteItem.fromJson(Map<String, dynamic> json) {
    return VoteItem(
      id: int.tryParse(json['id'].toString()) ?? 0,
      title: json['title']?.toString() ?? '',
      idesc: json['idesc']?.toString(),
      itype: int.tryParse(json['itype'].toString()) ?? 0,
      maxtime: int.tryParse(json['maxtime'].toString()) ?? 0,
      status: int.tryParse(json['status'].toString()) ?? 0,
      iview: int.tryParse(json['iview'].toString()) ?? 0,
      addtime: json['addtime']?.toString() ?? '',
      statime: json['statime']?.toString() ?? '',
      endtime: json['endtime']?.toString() ?? '',
      statusText: json['status_text']?.toString(),
      statusClass: json['status_class']?.toString(),
    );
  }

  bool get isSingleChoice => itype == 0;
  bool get isMultipleChoice => itype == 1;
  bool get isActive => status == 1;
}

/// 分页信息
class VotePagination {
  final int total;
  final int page;
  final int pageSize;
  final int totalPage;
  final int offset;

  VotePagination({
    required this.total,
    required this.page,
    required this.pageSize,
    required this.totalPage,
    required this.offset,
  });

  factory VotePagination.fromJson(Map<String, dynamic> json) {
    return VotePagination(
      total: int.tryParse(json['total'].toString()) ?? 0,
      page: int.tryParse(json['page'].toString()) ?? 1,
      pageSize: int.tryParse(json['pageSize'].toString()) ?? 10,
      totalPage: int.tryParse(json['totalPage'].toString()) ?? 1,
      offset: int.tryParse(json['offset'].toString()) ?? 0,
    );
  }
}

/// 投票详情响应
class VoteDetailResponse {
  final VoteItem vote;
  final List<VoteOption> options;
  final bool hasVoted;
  final List<int> userVotes;
  final bool canVote;

  VoteDetailResponse({
    required this.vote,
    required this.options,
    required this.hasVoted,
    required this.userVotes,
    required this.canVote,
  });

  factory VoteDetailResponse.fromJson(Map<String, dynamic> json) {
    final data = json['data'] as Map<String, dynamic>? ?? {};
    final voteRaw = data['vote'] as Map<String, dynamic>? ?? {};
    final optionsRaw = data['options'] as List? ?? [];
    final userVotesRaw = data['userVotes'] as List? ?? [];

    return VoteDetailResponse(
      vote: VoteItem.fromJson(voteRaw),
      options: optionsRaw.map((item) => VoteOption.fromJson(item)).toList(),
      hasVoted: data['hasVoted'] as bool? ?? false,
      userVotes: userVotesRaw
          .map((id) => int.tryParse(id.toString()) ?? 0)
          .where((id) => id > 0)
          .toList(),
      canVote: data['canVote'] as bool? ?? true,
    );
  }
}

/// 投票选项
class VoteOption {
  final int id;
  final int topicId;
  final String name;
  final String? idesc;
  final String? imgs;
  final int sort;

  VoteOption({
    required this.id,
    required this.topicId,
    required this.name,
    this.idesc,
    this.imgs,
    required this.sort,
  });

  factory VoteOption.fromJson(Map<String, dynamic> json) {
    return VoteOption(
      id: int.tryParse(json['id'].toString()) ?? 0,
      topicId: int.tryParse(json['topic_id'].toString()) ?? 0,
      name: json['name']?.toString() ?? '',
      idesc: json['idesc']?.toString(),
      imgs: json['imgs']?.toString(),
      sort: int.tryParse(json['sort'].toString()) ?? 0,
    );
  }
}

/// 投票结果响应
class VoteResultResponse {
  final VoteItem vote;
  final List<VoteResultOption> options;
  final int totalVotes;
  final bool hasVoted;
  final List<int> userVotes;

  VoteResultResponse({
    required this.vote,
    required this.options,
    required this.totalVotes,
    required this.hasVoted,
    required this.userVotes,
  });

  factory VoteResultResponse.fromJson(Map<String, dynamic> json) {
    final data = json['data'] as Map<String, dynamic>? ?? {};
    final voteRaw = data['vote'] as Map<String, dynamic>? ?? {};
    final optionsRaw = data['options'] as List? ?? [];
    final userVotesRaw = data['userVotes'] as List? ?? [];

    return VoteResultResponse(
      vote: VoteItem.fromJson(voteRaw),
      options: optionsRaw
          .map((item) => VoteResultOption.fromJson(item))
          .toList(),
      totalVotes: int.tryParse(data['totalVotes'].toString()) ?? 0,
      hasVoted: data['hasVoted'] as bool? ?? false,
      userVotes: userVotesRaw
          .map((id) => int.tryParse(id.toString()) ?? 0)
          .where((id) => id > 0)
          .toList(),
    );
  }
}

/// 投票结果选项
class VoteResultOption {
  final int id;
  final String name;
  final String? idesc;
  final String? imgs;
  final int count;
  final int percentage;

  VoteResultOption({
    required this.id,
    required this.name,
    this.idesc,
    this.imgs,
    required this.count,
    required this.percentage,
  });

  factory VoteResultOption.fromJson(Map<String, dynamic> json) {
    return VoteResultOption(
      id: int.tryParse(json['id'].toString()) ?? 0,
      name: json['name']?.toString() ?? '',
      idesc: json['idesc']?.toString(),
      imgs: json['imgs']?.toString(),
      count: int.tryParse(json['count'].toString()) ?? 0,
      percentage: int.tryParse(json['percentage'].toString()) ?? 0,
    );
  }
}