import {of as observableOf, Observable} from 'rxjs';

import {map, filter, mergeMap} from 'rxjs/operators';
import { Injectable } from '@angular/core';
import {
  Router,
  CanActivate,
  CanLoad,
  ActivatedRouteSnapshot,
  RouterStateSnapshot,
  Route, Data
} from '@angular/router';

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 router: Router,
              private config: ConfigurationService,
              private propertiesService: EnvironmentSpecificService) {}

  check(data: Data, community: string, path: string): Observable<boolean> | boolean {
    const customRedirect = data['redirect'];

      const redirect = customRedirect ? customRedirect : '/error';
      const obs = this.propertiesService.subscribeEnvironment().pipe(map(res => {
        let communityDomain = null;
        //if (!community) {
          communityDomain  = ConnectHelper.getCommunityFromDomain(res.domain);
        //}
        if(communityDomain) {
          community = communityDomain;
        } else if (!community && data['community']) { // for openaire or connect
          community = data['community'];
        }
       return  res;
      }),mergeMap(prop => {
        if (!community) {
          community = prop.adminToolsCommunity;
        }
        return this.config.isPageEnabled(prop, community, '/' + path);
      }),);
      obs.pipe(filter(enabled => !enabled))
          .subscribe(() => this.router.navigate([redirect], {queryParams: {'page': path}}));
      return obs;
  }

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