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

import {ConnectHelper} from '../connectHelper';

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

  constructor(private router: Router) {
  }

  check(community: string): Observable<boolean> | boolean {
    if (community && community !== 'undefined') {
      return true;
    } else {
      this.router.navigate(['errorcommunity']);
      return false;
    }
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {
    return this.check(route.queryParams['communityId']);
  }

  canLoad(route: Route, segments: UrlSegment[]): Observable<boolean> | Promise<boolean> | boolean {
    const path = '/' + route.path + document.location.search;
    return this.check(ConnectHelper.getCommunityFromPath(path));
  }
}