import 'package:dio/dio.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:sunny_mochi/core/config/api_paths.dart';
import 'package:sunny_mochi/core/error/exception_mapper.dart';
import 'package:sunny_mochi/core/error/failures.dart';
import 'package:sunny_mochi/core/network/api_response.dart';
import 'package:sunny_mochi/core/network/dio_client.dart';
import 'package:sunny_mochi/features/auth/data/models/user_model.dart';

part 'auth_remote_datasource.g.dart';

@riverpod
AuthRemoteDatasource authRemoteDatasource(Ref ref) =>
    AuthRemoteDatasource(ref.watch(dioClientProvider));

class AuthRemoteDatasource {
  const AuthRemoteDatasource(this._dio);
  final Dio _dio;

  static const _mapper = ExceptionMapper();

  /// 登录/发码端点跳过 AuthInterceptor，避免携带残留 token。
  static final _skipAuthOptions = Options(extra: const {'skip_auth': true});

  Future<UserModel> loginWithPhone(String phone, String code) async {
    final resp = await _dio.post<Map<String, dynamic>>(
      ApiPaths.authLoginSms,
      data: {'account': phone, 'smsCode': code, 'loginType': 2},
      options: _skipAuthOptions,
    );
    return _unwrapLogin(resp.data);
  }

  Future<UserModel> loginWithPassword(String phone, String password) async {
    final resp = await _dio.post<Map<String, dynamic>>(
      ApiPaths.authLoginPwd,
      data: {'account': phone, 'password': password, 'loginType': 1},
      options: _skipAuthOptions,
    );
    return _unwrapLogin(resp.data);
  }

  /// 返回 dev/test 环境后端回显的验证码明文（release 返回 null）。
  Future<String?> sendSmsCode(String phone) async {
    final resp = await _dio.post<Map<String, dynamic>>(
      ApiPaths.authSmsSend,
      data: {'phone': phone, 'codeType': 1},
      options: _skipAuthOptions,
    );
    final apiResp = parseEnvelope<String?>(resp.data, (j) => j as String?);
    if (!apiResp.isSuccess) {
      throw _mapper.fromBusinessCode(apiResp.retCode, apiResp.retMsg);
    }
    return apiResp.retData;
  }

  Future<void> logout() async {
    await _dio.post<void>(ApiPaths.authLogout);
  }

  Future<UserModel> getUserProfile() async {
    final resp = await _dio.get<Map<String, dynamic>>(ApiPaths.userProfile);
    final body = resp.data;
    if (body == null) throw const ServerFailure(message: '服务器响应为空');
    final apiResp = ApiResponse.fromJson(
      body,
      (json) => json as Map<String, dynamic>,
    );
    if (!apiResp.isSuccess) {
      throw _mapper.fromBusinessCode(apiResp.retCode, apiResp.retMsg);
    }
    final data = apiResp.retData ?? const <String, dynamic>{};
    return UserModel(
      userId: _flexStr(data['id'] ?? data['userId']),
      realName: _clean(data['realName']),
      username: _clean(data['realName']),
      avatar: _clean(data['avatar']),
      phone: _flexStr(data['phone']),
      email: _clean(data['email']),
      gender: (data['sex'] as num?)?.toInt(),
      employeeNo: _clean(data['workNo']),
      company: _clean(data['orgName']),
      department: _clean(data['deptName']),
    );
  }

  static String? _clean(dynamic v) {
    if (v == null) return null;
    final s = v.toString();
    if (s.isEmpty || s == '<null>' || s == 'null') return null;
    return s;
  }

  /// 解析登录 envelope：data = {saTokenInfo: {...}, userInfo: {...}}
  UserModel _unwrapLogin(Map<String, dynamic>? body) {
    if (body == null) throw const ServerFailure(message: '服务器响应为空');
    final apiResp = ApiResponse.fromJson(
      body,
      (json) => json as Map<String, dynamic>,
    );
    if (!apiResp.isSuccess) {
      throw _mapper.fromBusinessCode(apiResp.retCode, apiResp.retMsg);
    }
    final data = apiResp.retData;
    if (data == null) throw const ServerFailure(message: '登录响应缺少用户数据');
    final tokenInfo = data['saTokenInfo'] as Map<String, dynamic>?;
    final userInfo = data['userInfo'] as Map<String, dynamic>?;
    if (tokenInfo == null || userInfo == null) {
      throw const ServerFailure(message: '登录响应结构异常');
    }
    return UserModel(
      token: tokenInfo['tokenValue'] as String?,
      tokenName: tokenInfo['tokenName'] as String?,
      userId: _flexStr(tokenInfo['loginId']),
      realName: userInfo['realName'] as String?,
      username: userInfo['realName'] as String?,
      avatar: userInfo['avatar'] as String?,
      phone: _flexStr(userInfo['phone']),
      email: userInfo['email'] as String?,
      gender: (userInfo['sex'] as num?)?.toInt(),
      employeeNo: userInfo['workNo'] as String?,
      company: userInfo['orgName'] as String?,
      department: userInfo['deptName'] as String?,
    );
  }

  static String? _flexStr(dynamic v) {
    if (v == null) return null;
    if (v is String) return v.isEmpty ? null : v;
    if (v is int) return v.toString();
    return null;
  }
}