import { EntityManager } from "@mikro-orm/postgresql";
import { BadRequestException, Injectable } from "@nestjs/common";

import { TokensService } from "./tokens.service";
import { AuthMessage, UserMessage } from "../../../common/enums/message.enum";
import { Business } from "../../businesses/entities/business.entity";
import { NotificationQueue } from "../../notifications/queue/notification.queue";
import { Role } from "../../users/entities/role.entity";
import { RoleEnum } from "../../users/enums/role.enum";
import { UsersService } from "../../users/services/users.service";
import { OTPService } from "../../utils/providers/otp.service";
import { PasswordService } from "../../utils/providers/password.service";
import { SmsService } from "../../utils/providers/sms.service";
import { ChangePasswordDto } from "../DTO/change-password.dto";
import { CompleteRegistrationDto } from "../DTO/complete-register.dto";
import { CheckUserExistDto, LoginPasswordDTO } from "../DTO/loginPassword.dto";
import { RequestOtpDto } from "../DTO/request-otp.dto";
import { VerifyOtpDto } from "../DTO/verify-otp.dto";
@Injectable()
export class AuthService {
  constructor(
    private readonly usersService: UsersService,
    private readonly passwordService: PasswordService,
    private readonly otpService: OTPService,
    private readonly tokensService: TokensService,
    private readonly notificationQueue: NotificationQueue,
    private readonly smsService: SmsService,
    private readonly em: EntityManager,
  ) {}
  //****************** */
  //****************** */
  async initiateRegistration(requestOtpDto: RequestOtpDto, businessId: string) {
    const { phone } = requestOtpDto;
    const existUser = await this.usersService.findOneWithPhone(phone, businessId);
    if (existUser) throw new BadRequestException(AuthMessage.PHONE_EXISTS);

    const existCode = await this.otpService.checkExistOtp(phone, "REGISTER");
    if (existCode) {
      return {
        message: AuthMessage.OTP_ALREADY_SENT,
        ttlSecond: existCode,
      };
    }
    const otpCode = await this.otpService.generateAndSetInCache(phone, "REGISTER");

    //
    await this.notificationQueue.addOtpNotification(phone, { userPhone: phone, otp: otpCode });

    return {
      message: AuthMessage.OTP_SENT,
    };
  }
  //****************** */
  //****************** */
  async completeRegistration(completeRegistrationDto: CompleteRegistrationDto, business: Business) {
    const { phone, code } = completeRegistrationDto;

    const entityManager = this.em.fork();

    try {
      await entityManager.begin();
      //

      const isValid = await this.otpService.verifyOtp(phone, code, "REGISTER");
      if (!isValid) throw new BadRequestException(AuthMessage.INVALID_OTP);

      const existUser = await this.usersService.findOneWithPhone(phone, business.id);
      if (existUser) throw new BadRequestException(AuthMessage.PHONE_EXISTS);

      const hashedPassword = await this.passwordService.hashPassword(completeRegistrationDto.password);

      const user = await this.usersService.createUser(completeRegistrationDto, hashedPassword, business, entityManager);

      const tokens = await this.tokensService.generateTokens(user, entityManager);

      await this.otpService.delOtpFormCache(phone, "REGISTER");

      await entityManager.commit();

      return {
        message: AuthMessage.USER_REGISTER_SUCCESS,
        ...tokens,
      };
    } catch (error) {
      await entityManager.rollback();
      throw error;
    }
  }
  //****************** */
  //****************** */
  async loginWithPassword(loginDto: LoginPasswordDTO, businessId: string) {
    const { email, password } = loginDto;

    const user = await this.checkUserLoginCredentialWithEmail(email, password, businessId);

    if (this.checkUserIsAdmin(user.role)) throw new BadRequestException(AuthMessage.ADMIN_CAN_NOT_LOGIN);

    const tokens = await this.tokensService.generateTokens(user);

    await this.notificationQueue.addLoginNotification(user.id, { userPhone: user.phone });

    return {
      message: AuthMessage.PASSWORD_LOGIN_SUCCESS,
      ...tokens,
    };
  }

  //****************** */
  //****************** */

  async checkUserExist(checkUserExistDto: CheckUserExistDto, businessId: string) {
    const user = await this.usersService.findOneWithEmail(checkUserExistDto.email, businessId);
    if (!user) throw new BadRequestException(UserMessage.USER_NOT_FOUND);
    return { message: UserMessage.USER_EXISTS };
  }

  //****************** */
  //****************** */

  async requestLoginOtp(requestOtpDto: RequestOtpDto, businessId: string) {
    const { phone } = requestOtpDto;

    const user = await this.usersService.findOneWithPhone(phone, businessId);
    if (!user) throw new BadRequestException(AuthMessage.PHONE_NOT_FOUND);

    //check the if the method call is from admin or not

    const isUserAdmin = this.checkUserIsAdmin(user.role);

    if (isUserAdmin) throw new BadRequestException(AuthMessage.NOT_ADMIN);

    const existCode = await this.otpService.checkExistOtp(phone, "LOGIN");
    if (existCode) {
      return {
        message: AuthMessage.OTP_ALREADY_SENT,
        ttlSecond: existCode,
      };
    }

    const otpCode = await this.otpService.generateAndSetInCache(phone, "LOGIN");
    //
    await this.smsService.sendSmsVerifyCode(phone, otpCode);

    return {
      message: AuthMessage.OTP_SENT,
    };
  }

  //****************** */
  //****************** */

  async verifyLoginOtp(verifyOtpDto: VerifyOtpDto, businessId: string) {
    const { code, phone } = verifyOtpDto;

    const user = await this.checkUserLoginCredentialWithPhone(phone, code, businessId);

    if (this.checkUserIsAdmin(user.role)) throw new BadRequestException(AuthMessage.ADMIN_CAN_NOT_LOGIN);

    const tokens = await this.tokensService.generateTokens(user);

    await this.notificationQueue.addLoginNotification(user.id, { userPhone: user.phone, userEmail: user.email });
    return {
      message: AuthMessage.LOGIN_SUCCESS,
      ...tokens,
    };
  }

  //****************** */

  async changePassword(userId: string, updateDto: ChangePasswordDto) {
    const { user } = await this.usersService.findOneById(userId);

    const passCompare = await this.passwordService.comparePassword(updateDto.password, user.password);
    if (!passCompare) throw new BadRequestException(AuthMessage.CURRENT_PASSWORD_INVALID);

    if (updateDto.newPassword !== updateDto.repeatPassword) throw new BadRequestException(AuthMessage.INVALID_REPEAT_PASSWORD);

    const hashedPassword = await this.passwordService.hashPassword(updateDto.newPassword);
    await this.usersService.updateUserPassword(user, hashedPassword);

    return {
      message: AuthMessage.PASSWORD_CHANGED_SUCCESSFULLY,
    };
  }
  //****************** */

  async refreshToken(oldRefreshToken: string) {
    return this.tokensService.refreshToken(oldRefreshToken);
  }
  //****************** */

  async logout(userId: string) {
    await this.tokensService.invalidateRefreshToken(userId);
    return {
      message: AuthMessage.LOGOUT_SUCCESS,
    };
  }

  //****************** */

  private async checkUserLoginCredentialWithEmail(email: string, password: string, businessId: string) {
    const user = await this.usersService.findOneWithEmail(email, businessId);
    if (!user) throw new BadRequestException(AuthMessage.INVALID_PASSWORD);

    const passCompare = await this.passwordService.comparePassword(password, user.password);
    if (!passCompare) throw new BadRequestException(AuthMessage.INVALID_PASSWORD);

    return user;
  }
  //****************** */
  //****************** */

  private async checkUserLoginCredentialWithPhone(phone: string, otpCode: string, businessId: string) {
    const isValid = await this.otpService.verifyOtp(phone, otpCode, "LOGIN");
    if (!isValid) throw new BadRequestException(AuthMessage.INVALID_OTP);

    await this.otpService.delOtpFormCache(phone, "LOGIN");

    const user = await this.usersService.findOneWithPhone(phone, businessId);
    if (!user) throw new BadRequestException(UserMessage.USER_NOT_FOUND);

    return user;
  }
  //   private checkUserPerm(user: User, perm: PermissionEnum) {
  //     return user.roles.some((role) => role?.permissions?.some((p) => p.name === perm));
  //   }
  //****************** */
  //****************** */
  private checkUserIsAdmin(role: Role) {
    return role.name === RoleEnum.ADMIN;
  }
}