import 'package:dio/dio.dart';

import '../../../common/network/dio_provider.dart';
import '../../../models/pb/jinzhi/v1/account.pb.dart' as pb;
import 'auth_models.dart';

/// 金值账户的 protobuf-over-HTTP 客户端。
class AuthApi {
  const AuthApi(this._dio);

  final Dio _dio;

  Future<int> sendSmsCode(String phone) async {
    final response = await _dio.post<List<int>>(
      '/api/v1/auth/sms/send',
      data: pb.SendSmsCodeRequest(phone: phone).writeToBuffer(),
      options: protobufOptions(),
    );
    return pb.SendSmsCodeReply.fromBuffer(
      response.data ?? const <int>[],
    ).expiresIn;
  }

  Future<AuthLoginResult> verifySmsCode(String phone, String code) async {
    final response = await _dio.post<List<int>>(
      '/api/v1/auth/sms/verify',
      data: pb.VerifySmsCodeRequest(phone: phone, code: code).writeToBuffer(),
      options: protobufOptions(),
    );
    return AuthLoginResult.fromProto(
      pb.VerifySmsCodeReply.fromBuffer(response.data ?? const <int>[]),
    );
  }

  Future<AuthLoginResult> verifyOneKeyLogin(String loginToken) async {
    final response = await _dio.post<List<int>>(
      '/api/v1/auth/onekey/verify',
      data: pb.VerifyOneKeyLoginRequest(loginToken: loginToken).writeToBuffer(),
      options: protobufOptions(),
    );
    return AuthLoginResult.fromProto(
      pb.VerifySmsCodeReply.fromBuffer(response.data ?? const <int>[]),
    );
  }

  Future<JinzhiUser> getProfile() async {
    final response = await _dio.get<List<int>>(
      '/api/v1/me',
      options: protobufOptions(),
    );
    final reply = pb.ProfileReply.fromBuffer(response.data ?? const <int>[]);
    if (!reply.hasUser()) {
      throw const FormatException('账号资料响应缺少 user');
    }
    return _userFromProto(reply.user);
  }

  Future<void> deleteAccount(String smsCode) async {
    await _dio.delete<List<int>>(
      '/api/v1/me',
      data: pb.DeleteAccountRequest(smsCode: smsCode).writeToBuffer(),
      options: protobufOptions(),
    );
  }
}

class AuthLoginResult {
  const AuthLoginResult({
    required this.accessToken,
    required this.expiresIn,
    required this.user,
  });

  final String accessToken;
  final int expiresIn;
  final JinzhiUser user;

  factory AuthLoginResult.fromProto(pb.VerifySmsCodeReply reply) {
    if (reply.accessToken.trim().isEmpty || !reply.hasUser()) {
      throw const FormatException('登录响应缺少 access_token 或 user');
    }
    return AuthLoginResult(
      accessToken: reply.accessToken.trim(),
      expiresIn: reply.expiresIn,
      user: _userFromProto(reply.user),
    );
  }
}

JinzhiUser _userFromProto(pb.UserInfo user) => JinzhiUser(
  id: user.id.trim(),
  phone: user.phone.trim(),
  createdAt: user.createdAt.trim(),
);