import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router, UrlTree } from '@angular/router';
import { Observable } from 'rxjs';

import { AuthenticationService } from '../_services/authentication.service';

@Injectable({
  providedIn: 'root'
})
export class AuthGuard implements CanActivate {

  constructor(private _authService: AuthenticationService, private router: Router){}

  canActivate(
    next: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean | UrlTree {
    if (this._authService.IsLoggedIn){
      return true;
    } 
    else {
      return this.router.parseUrl('/home');
    }
  }
}