import { Injectable } from '@angular/core';
import {ActivatedRoute, Router,CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot} from '@angular/router';
import {Observable}       from 'rxjs/Observable';
import 'rxjs/add/operator/filter';
import { ConfigurationService } from '../utils/configuration/configuration.service';
import { EnvironmentSpecificService} from '../utils/properties/environment-specific.service';
import {ConnectHelper} from '../connect/connectHelper';

@Injectable()
export class IsRouteEnabled implements CanActivate {

  constructor(private route: ActivatedRoute,private router: Router, private config: ConfigurationService, private propertiesService:EnvironmentSpecificService ) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {

         let customRedirect = route.data['redirect'];
          let community = route.queryParams["communityId"];
          if(!community && route.data['community']){ // for openaire
            let community  = route.data['community']
          }
          if(!community && typeof document != 'undefined'){
           community  = ConnectHelper.getCommunityFromDomain(document.location.hostname);
          }

         if(community){
           let redirect = !!customRedirect ? customRedirect : '/error';
           let obs = this.propertiesService.subscribeEnvironment().map(res=>res["adminToolsAPIURL"]).mergeMap(url => {
             return this.config.isPageEnabled(url, community,"/"+state.url.split("?")[0].substring(1))});
           obs.filter(enabled => !enabled)
           .subscribe(() => this.router.navigate([redirect], { queryParams: { "page": state.url } }));
           return obs;
         }
         return true;
      }
}