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

import { Store, select } from '@ngrx/store';
import { Observable } from 'rxjs';
import { map, take } from 'rxjs/operators';
import { CookieService } from 'ngx-cookie-service';

import { AuthSelector } from '../../modules/accounts/store';
import * as AppLoginStore from '../store/login';

@Injectable()
export class AuthGuard implements CanActivate {
  constructor(
    private store: Store<any>,
    private router: Router,
    private cookieService: CookieService,
  ) { }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
    return this.store.pipe(
      take(1),
      select(AuthSelector.selectLogined),
      map((logined) => {
        if (!logined) {
          if (this.cookieService.check('jwt')) {
            this.store.dispatch(new AppLoginStore.LoginToken({
              token: this.cookieService.get('jwt'),
              returnURL: state.url
            }));
          } else {
            this.store.dispatch(new AppLoginStore.LoginRedirect({ returnURL: state.url }));
          }
          return false;
        }

        return true;
      }),
    );
  }

}