pdi_api/src/auth/auth.service.ts

import {
  BadRequestException,
  Injectable,
  UnauthorizedException,
} from '@nestjs/common';
import { UsersService } from '../users/users.service';
import { LoginDTO } from '../dtos/loginDTO';
import { JwtService } from '@nestjs/jwt';
import { UsuarioEntity } from '../entities/usuario.entity';

@Injectable()
export class AuthService {
  constructor(
    private usersService: UsersService,
    private jwtService: JwtService,
  ) {}

  async signIn(loginDto: LoginDTO): Promise<any> {
    let user: UsuarioEntity;
    switch (loginDto.tipo_usuario) {
      case 1:
        // Administrador
        break;
      case 2:
        // Alumno
        user = await this.usersService.findStudent(loginDto);
        break;

      case 3:
        // Trabajadores académicos o base
        user = await this.usersService.findWorker(loginDto);
      default:
        throw new BadRequestException();
        break;
    }

    if (user === null) {
      throw new UnauthorizedException();
    }

    const payload = { id: user.id, userType: user.tipo_usuario_id };

    const access_token = await this.jwtService.signAsync(payload);

    return user;
  }
}