import {
  BadRequestException,
  HttpException,
  HttpStatus,
  Injectable,
  Logger,
  NotAcceptableException,
  NotFoundException,
} from "@nestjs/common";
import { JwtService } from "@nestjs/jwt";
import { Types } from "mongoose";
import { LoginDtoRs } from "src/auth/dto/user/login.dto";
import { UserDbService } from "src/users/entities/db-service/user.db.service";
import { HashService } from "src/utils/hash/hash.service";
import { OtpService } from "src/utils/otp/otp.service";
import { SmsManagerService } from "src/utils/sms-manager/sms-manager.service";

// TODO FIX REGISTER TO USER.SERVICE AND AUTH IN THIS MODULE
@Injectable()
export class UserAuthService {
  private readonly logger = new Logger(UserAuthService.name);

  constructor(
    private readonly jwtService: JwtService,
    private readonly userDbService: UserDbService,
    private readonly hashService: HashService,
    private readonly otpCreator: OtpService,
    private readonly smsManagerService: SmsManagerService,
  ) {}

  async validateUser(username: string, pass: string): Promise<any> {
    const user = await this.userDbService.findOne({ username });
    if (!user) throw new NotFoundException("user not found");

    const now = new Date().getTime();
    if (user.otp == null) throw new NotAcceptableException("please get otp");
    if (user.otpExpire < now) {
      throw new NotAcceptableException("expire otp");
    }
    if (await this.hashService.compare(pass, user.otp)) {
      return user;
    }
    return false;
  }

  async login(user: any) {
    const payload = {
      username: user.username,
      sub: user.id,
      role: "user",
    };
    const accToken = this.jwtService.sign(payload, {
      secret: `${process.env.SECRET}`,
    });
    await this.userDbService.findOneAndUpdate(
      { username: user.username },
      {
        tokens: { token: accToken },
        otp: null,
      },
    );
    return {
      userId: user._id,
      access_token: accToken,
    };
  }

  async sendOtpRequest(mobile: string): Promise<LoginDtoRs> {
    const userExist = await this.userDbService.findOne({
      mobile,
    });
    const otp = this.otpCreator.create();
    const hashOtp = await this.hashService.hash(otp);
    const rawExpireMinutes = Number(process.env.EXP_OTP_TIME ?? "2");
    const expireMinutes =
      Number.isFinite(rawExpireMinutes) && rawExpireMinutes > 0
        ? rawExpireMinutes
        : 2;
    const otpExpire = Date.now() + expireMinutes * 60 * 1000;
    if (!userExist) {
      await this.smsSender(otp, mobile);
      /// create otp request
      const newUser = await this.userDbService.createUser({
        mobile,
        username: mobile,
        otp: hashOtp,
        tokens: {
          token: "",
          rfToken: "",
        },
        fullName: "",
        nationalCode: "",
        lastLogin: new Date(),
        clientKey: new Types.ObjectId(),
        birthDay: "",
        city: "",
        address: "",
        state: "",
        otpExpire,
      });
      return new LoginDtoRs(newUser);
    }
    if (userExist) {
      if (userExist.otpExpire > new Date(new Date().getTime()).getTime()) throw new BadRequestException("Wait for expiry time to finish");
      await this.smsSender(otp, mobile);
      const updateTokens = await this.userDbService.findOneAndUpdate(
        {
          username: userExist.username,
        },
        {
          otp: hashOtp,
          otpExpire,
        },
      );
      if (updateTokens) return new LoginDtoRs(userExist);
    }
  }

  private async smsSender(otp: string, mobile: string) {
    return this.smsManagerService
      .verifyLookUp({
        token: otp,
        template: process.env.AUTH_SMS_TEMPLATE,
        receptor: mobile,
      })
      .then((smsRes) => {
        this.logger.log(
          `${"phone : " + mobile + " " + ", status : " + smsRes["return"]?.status + ", otp : " + otp} `,
        );
      })
      .catch((er) => {
        this.logger.error(
          `${"phone : " + mobile + " " + ", status : " + er["return"]?.status + ", otp : " + otp} `,
        );
        throw new HttpException(
          " auth sms send failed",
          HttpStatus.INTERNAL_SERVER_ERROR,
        );
      });
  }
}