import { Injectable } from '@nestjs/common'
import { UserService } from 'src/user/user.service'
import { JwtService } from '@nestjs/jwt'

@Injectable()
export class AuthService {
  constructor(
    private userService: UserService,
    private jwtService: JwtService
  ) {}

  //app.controller.ts에서 @UseGuards(AuthGuard('local'))용
  async validateUser(email: string, password: string): Promise<any> {
    const user = await this.userService.fetchOneByEmail(email)
    if (user && user.password === password) {
      const { password, ...result } = user
      // result는 password 를 제외한 user의 모든 정보를 포함한다.
      return result
    }
    return null
  }

  async login(user: any) {
    const payload = { id: user.id, username: user.username, role: user.role }
    return { access_token: this.jwtService.sign(payload) }
  }
}