import { Injectable } from '@angular/core';
import {Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Route, CanLoad} from '@angular/router';
import {Observable} from 'rxjs/Observable';
import {Session} from './utils/helper.class';
import {LoginErrorCodes} from './utils/guardHelper.class';

@Injectable()
export class LoginGuard implements CanActivate, CanLoad {

  constructor(private router: Router) {
  }

  check(path: string): boolean {
    let loggedIn = false;
    if (Session.isLoggedIn()) {
      loggedIn = true;
    }
    if (!loggedIn) {
      this.router.navigate(['/user-info'], {queryParams: {'errorCode': LoginErrorCodes.NOT_LOGIN, path}});
    }
    return loggedIn;
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {
    return this.check(state.url);
  }

  canLoad(route: Route): Observable<boolean> | Promise<boolean> | boolean {
    return this.check('/' + route.path);
  }
}