import { BadRequestException, Inject, Injectable, UnauthorizedException } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { Strategy, ExtractJwt } from 'passport-jwt';
import * as process from "process";
import { JwtPayload } from './auth/auth.service';
import { UsersService } from '../../shared/services/users/users.service';
import { JWT_SECRET_KEY_TOKEN } from '../auth.tokens';

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy, 'jwt') {

  constructor(
    private userService: UsersService,
    @Inject(JWT_SECRET_KEY_TOKEN) private secretToken: string
  ) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      secretOrKey: secretToken,
    });
  }

  async validate(payload: JwtPayload, done: (err?, user?) => void) {
    try {
      const user = (await this.userService.findByEmail(payload.email))[0];
      if (!user) {
        throw new BadRequestException('User doesn\'t exists');
      }

      // вторым параметром передается user, его можно получить в контроллере через request.user
      done(null, {...payload, ...user});
    } catch (err) {
      throw new UnauthorizedException('unauthorized', err.message);
    }
  }

}