import { BadRequestException, forwardRef, Inject, Injectable, Logger } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import * as bcrypt from 'bcrypt';
import moment from 'moment';
import { FindOptionsWhere } from 'typeorm';
import { Transactional } from 'typeorm-transactional';
import { CountryIso } from '~/common/enums';
import { NotificationsService } from '~/common/modules/notification/services';
import { CustomerService } from '~/customer/services';
import { CreateUnverifiedUserRequestDto, VerifyUserRequestDto } from '../../auth/dtos/request';
import { Roles } from '../../auth/enums';
import {
  CreateCheckerRequestDto,
  SetInternalPasswordRequestDto,
  UpdateNotificationsSettingsRequestDto,
  UserFiltersRequestDto,
} from '../dtos/request';
import { User } from '../entities';
import { UserType } from '../enums';
import { UserRepository } from '../repositories';
import { DeviceService } from './device.service';
import { UserTokenService } from './user-token.service';
const SALT_ROUNDS = 10;
@Injectable()
export class UserService {
  private readonly logger = new Logger(UserService.name);
  private adminPortalUrl = this.configService.getOrThrow('ADMIN_PORTAL_URL');
  constructor(
    private readonly userRepository: UserRepository,
    @Inject(forwardRef(() => NotificationsService)) private readonly notificationsService: NotificationsService,
    private readonly deviceService: DeviceService,
    private readonly userTokenService: UserTokenService,
    private readonly configService: ConfigService,
    private customerService: CustomerService,
  ) {}

  findUser(where: FindOptionsWhere<User> | FindOptionsWhere<User>[]) {
    this.logger.log(`finding user with where clause ${JSON.stringify(where)}`);
    return this.userRepository.findOne(where);
  }

  setEmail(userId: string, email: string) {
    this.logger.log(`Setting email ${email} for user ${userId}`);
    return this.userRepository.update(userId, { email });
  }

  setPasscode(userId: string, passcode: string, salt: string) {
    this.logger.log(`Setting passcode for user ${userId}`);
    return this.userRepository.update(userId, { password: passcode, salt, isProfileCompleted: true });
  }

  setPhoneNumber(userId: string, phoneNumber: string, countryCode: string) {
    this.logger.log(`Setting phone number ${phoneNumber} for user ${userId}`);
    return this.userRepository.update(userId, { phoneNumber, countryCode });
  }

  @Transactional()
  async verifyUser(userId: string, body: VerifyUserRequestDto) {
    this.logger.log(`Verifying user  email with id ${userId}`);
    await Promise.all([
      this.customerService.createGuardianCustomer(userId, {
        firstName: body.firstName,
        lastName: body.lastName,
        dateOfBirth: body.dateOfBirth,
        countryOfResidence: body.countryOfResidence,
      }),
      this.userRepository.update(userId, { isEmailVerified: true }),
    ]);
  }

  findUsers(filters: UserFiltersRequestDto) {
    this.logger.log(`Getting users with filters ${JSON.stringify(filters)}`);
    return this.userRepository.findUsers(filters);
  }

  async findUserOrThrow(where: FindOptionsWhere<User>) {
    this.logger.log(`Finding user with where clause ${JSON.stringify(where)}`);
    const user = await this.findUser(where);

    if (!user) {
      this.logger.error(`User with not found with where clause ${JSON.stringify(where)}`);
      throw new BadRequestException('USER.NOT_FOUND');
    }

    this.logger.log(`User with where clause ${JSON.stringify(where)} found successfully`);
    return user;
  }

  @Transactional()
  async findOrCreateUser(body: CreateUnverifiedUserRequestDto) {
    this.logger.log(`Finding or creating user with email ${body.email}`);
    const user = await this.userRepository.findOne({ email: body.email });

    if (!user) {
      this.logger.log(`User with email ${body.email} not found, creating new user`);
      return this.userRepository.createUnverifiedUser({ email: body.email, roles: [Roles.GUARDIAN] });
    }
    if (user && user.roles.includes(Roles.GUARDIAN) && user.isEmailVerified) {
      this.logger.error(`User with email ${body.email} already exists`);
      throw new BadRequestException('USER.EMAIL_ALREADY_TAKEN');
    }

    if (user && user.roles.includes(Roles.JUNIOR)) {
      this.logger.error(`User with email ${body.email} is an already registered junior`);
      throw new BadRequestException('USER.JUNIOR_UPGRADE_NOT_SUPPORTED_YET');
      //TODO add role Guardian to the existing user and send OTP
    }

    this.logger.log(`User with email ${body.email}`);
    return user;
  }

  async findOrCreateByEmail(email: string) {
    this.logger.log(`Finding or creating user with email ${email} `);
    const user = await this.userRepository.findOne({ email });

    if (!user) {
      this.logger.log(`User with email ${email} not found, creating new user`);
      return this.userRepository.createUser({ email, roles: [Roles.GUARDIAN] });
    }

    if (user && user.roles.includes(Roles.JUNIOR)) {
      this.logger.error(`User with email ${email} is an already registered junior`);
      throw new BadRequestException('USER.JUNIOR_UPGRADE_NOT_SUPPORTED_YET');
      //TODO add role Guardian to the existing user and send OTP
    }

    this.logger.log(`User with email ${email} found successfully`);
    return user;
  }

  async createUser(data: Partial<User>) {
    this.logger.log(`Creating user with data ${JSON.stringify(data)}`);
    const user = await this.userRepository.createUser(data);

    this.logger.log(`User with data ${JSON.stringify(data)} created successfully`);
    return user;
  }

  @Transactional()
  async createChecker(data: CreateCheckerRequestDto) {
    const existingUser = await this.userRepository.findOne([
      { email: data.email },
      { phoneNumber: data.phoneNumber, countryCode: data.countryCode },
    ]);

    if (existingUser) {
      throw new BadRequestException('USER.ALREADY_EXISTS');
    }

    const user = await this.createUser({
      ...data,
      roles: [Roles.CHECKER],
      isProfileCompleted: true,
    });
    const ONE_DAY = moment().add(1, 'day').toDate();
    const token = await this.userTokenService.generateToken(user.id, ONE_DAY);
    await this.sendCheckerAccountCreatedEmail(data.email, token);

    return user;
  }

  async updateNotificationSettings(userId: string, data: UpdateNotificationsSettingsRequestDto, deviceId?: string) {
    this.logger.log(`Updating notification settings for user ${userId} with data ${JSON.stringify(data)}`);
    if (data.isPushEnabled && !data.fcmToken) {
      throw new BadRequestException('USER.FCM_TOKEN_REQUIRED');
    }

    if (data.isPushEnabled && !deviceId) {
      throw new BadRequestException('DEVICE_ID_REQUIRED');
    }

    if (data.isPushEnabled && deviceId && data.fcmToken) {
      await this.deviceService.updateDevice(deviceId, { fcmToken: data.fcmToken, userId });
    }

    await this.userRepository.update(userId, {
      isPushEnabled: data.isPushEnabled,
      isEmailEnabled: data.isEmailEnabled,
      isSmsEnabled: data.isSmsEnabled,
    });
  }

  async createGoogleUser(googleId: string, email: string, firstName: string, lastName: string) {
    this.logger.log(`Creating google user with googleId ${googleId} and email ${email}`);
    const user = await this.userRepository.createUser({
      googleId,
      email,
      roles: [Roles.GUARDIAN],
      isEmailVerified: true,
    });

    await this.customerService.createGuardianCustomer(user.id, {
      firstName,
      lastName,
      countryOfResidence: CountryIso.SAUDI_ARABIA,
    });

    return this.findUserOrThrow({ id: user.id });
  }

  async createAppleUser(appleId: string, email: string, firstName: string, lastName: string) {
    this.logger.log(`Creating apple user with appleId ${appleId} and email ${email}`);
    const user = await this.userRepository.createUser({
      appleId,
      email,
      roles: [Roles.GUARDIAN],
      isEmailVerified: true,
    });

    await this.customerService.createGuardianCustomer(user.id, {
      firstName,
      lastName,
      countryOfResidence: CountryIso.SAUDI_ARABIA,
    });
    return this.findUserOrThrow({ id: user.id });
  }

  async setCheckerPassword(data: SetInternalPasswordRequestDto) {
    const userId = await this.userTokenService.validateToken(data.token, UserType.CHECKER);
    this.logger.log(`Setting password for checker ${userId}`);
    const salt = bcrypt.genSaltSync(SALT_ROUNDS);
    const hashedPasscode = bcrypt.hashSync(data.password, salt);

    return this.userRepository.update(userId, { password: hashedPasscode, salt, isProfileCompleted: true });
  }

  async updateUser(userId: string, data: Partial<User>) {
    this.logger.log(`Updating user ${userId} with data ${JSON.stringify(data)}`);
    const { affected } = await this.userRepository.update(userId, data);
    if (affected === 0) {
      this.logger.error(`User with id ${userId} not found`);
      throw new BadRequestException('USER.NOT_FOUND');
    }
  }

  private sendCheckerAccountCreatedEmail(email: string, token: string) {
    return this.notificationsService.sendEmailAsync({
      to: email,
      template: 'user-invite',
      subject: 'Checker Account Created',
      data: { inviteLink: `${this.adminPortalUrl}?token=${token}` },
    });
  }
}