import { Component } from '@angular/core';
import { Community } from '../../core/shared/community.model';
import { ComColDataService } from '../../core/data/comcol-data.service';
import { NormalizedCommunity } from '../../core/cache/models/normalized-community.model';
import { CommunityDataService } from '../../core/data/community-data.service';
import { CollectionDataService } from '../../core/data/collection-data.service';
import { Collection } from '../../core/shared/collection.model';
import { RouteService } from '../../shared/services/route.service';
import { Router } from '@angular/router';
import { DSOSuccessResponse, ErrorResponse } from '../../core/cache/response-cache.models';
import { Observable } from 'rxjs/Observable';
import { ResponseCacheEntry } from '../../core/cache/response-cache.reducer';
import { first, map, take } from 'rxjs/operators';
import { RemoteData } from '../../core/data/remote-data';
import { isNotEmpty } from '../../shared/empty.util';
import { DSpaceObject } from '../../core/shared/dspace-object.model';
import { HttpEvent } from '@angular/common/http';

@Component({
  selector: 'ds-create-collection',
  styleUrls: ['./create-collection-page.component.scss'],
  templateUrl: './create-collection-page.component.html'
})
export class CreateCollectionPageComponent {

  public parentUUID$: Observable<string>;
  public communityRDObs: Observable<RemoteData<Community>>;

  public constructor(
    private collectionDataService: CollectionDataService,
    private communityDataService: CommunityDataService,
    private routeService: RouteService,
    private router: Router
  ) {
    this.parentUUID$ = this.routeService.getQueryParameterValue('parent');
    this.parentUUID$.subscribe((uuid: string) => {
      if (isNotEmpty(uuid)) {
        this.communityRDObs = this.communityDataService.findById(uuid);
      }
    });
  }

  onSubmit(data: any) {
    this.parentUUID$.pipe(take(1)).subscribe((uuid: string) => {
      const collection = Object.assign(new Collection(), {
        name: data.name,
        metadata: [
          { key: 'dc.description', value: data.introductory },
          { key: 'dc.description.abstract', value: data.description },
          { key: 'dc.rights', value: data.copyright },
          { key: 'dc.rights.license', value: data.license }
          // TODO: metadata for news and provenance
        ]
      });
      this.collectionDataService.create(collection, uuid).subscribe((rd: RemoteData<DSpaceObject>) => {
        const url: string = '/collections/' + rd.payload.id;
        this.router.navigateByUrl(url);
      });
    });
  }

}