import { Injectable, InternalServerErrorException } from '@nestjs/common';
import { sign }                                     from 'jsonwebtoken';

export enum Provider {
    GOOGLE = 'google'
}

@Injectable()
export class AuthService {

    private readonly JWT_SECRET_KEY = 'VERY_SECRET_KEY'; // <- replace this with your secret key

    public constructor(/*private readonly usersService: UsersService*/) {

    }

    public async validateOAuthLogin(thirdPartyId: string, provider: Provider): Promise<string> {

        try {

            // You can add some registration logic here,
            // to register the user using their thirdPartyId (in this case their googleId)
            // let user: IUser = await this.usersService.findOneByThirdPartyId(thirdPartyId, provider);

            // if (!user)
            // user = await this.usersService.registerOAuthUser(thirdPartyId, provider);

            const payload = {

                thirdPartyId,
                provider

            };

            const jwt: string = sign(payload, this.JWT_SECRET_KEY, { expiresIn: 3600 });

            return jwt;

        } catch (err) {

            throw new InternalServerErrorException('validateOAuthLogin', err.message);

        }

    }

}