import {Injectable} from "@angular/core";
import {UserRestService} from "../../core/rest-services/user.rest-service";
import {LoginRequest} from "../../core/model/login-request";
import {Subject} from "rxjs";
import {MessageService} from "../../core/services/message.service";
import {AuthenticationService} from "../../core/services/authentication.service";
import {Router} from "@angular/router";

@Injectable()
export class LoginService {
  private isLoginPending: Subject<boolean> = new Subject<boolean>();

  constructor(
    private authenticationService: AuthenticationService,
    private messageService: MessageService,
    private router: Router,
    private userRestService: UserRestService
  ) {}

  login(loginRequest: LoginRequest): void {
    this.isLoginPending.next(true);

    this.userRestService.login(loginRequest)
      .then(loginResponse => {
        this.messageService.display('Login success!');
        this.authenticationService.setAuthenticated(loginResponse);
        this.router.navigate(['/']);
      })
      .catch(error => {
        if (error.status === 400) {
          this.messageService.display('Login or password incorrect.')
        } else {
          this.messageService.display('An error occured while login.')
        }
      });
  }
}