import { NotificationsService } from '../../shared/notifications/notifications.service';
import { NoContent } from '../../core/shared/NoContent.model';
import { RouteService } from '../../core/services/route.service';
import { getFirstCompletedRemoteData, getRemoteDataPayload } from '../../core/shared/operators';
import { RemoteData } from '../../core/data/remote-data';
import { Component, OnInit } from '@angular/core';
import { WorkspaceItem } from '../../core/submission/models/workspaceitem.model';
import { map, Observable, switchMap, take } from 'rxjs';
import { ActivatedRoute, Data, Params, Router } from '@angular/router';
import { Location } from '@angular/common';
import { WorkspaceitemDataService } from '../../core/submission/workspaceitem-data.service';
import { TranslateService } from '@ngx-translate/core';
import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
import { DSpaceObject } from '../../core/shared/dspace-object.model';

@Component({
  selector: 'ds-workspaceitems-delete-page',
  templateUrl: './workspaceitems-delete-page.component.html',
  styleUrls: ['./workspaceitems-delete-page.component.scss']
})
export class WorkspaceItemsDeletePageComponent implements OnInit {

  /**
   * The workspaceitem to delete
   */
  public wsi$: Observable<WorkspaceItem>;

  /**
   * The dspace object
   */
  public dso$: Observable<DSpaceObject>;

  /**
   * The previous query parameters
   */
  private previousQueryParameters?: Params;

  constructor(
    private activatedRoute: ActivatedRoute,
    private router: Router,
    private routeService: RouteService,
    private workspaceItemService: WorkspaceitemDataService,
    private notificationsService: NotificationsService,
    private translationService: TranslateService,
    private location: Location,
    private modalService: NgbModal,
  ) { }

  ngOnInit(): void {
    this.wsi$ = this.activatedRoute.data.pipe(map((data: Data) => data.wsi as RemoteData<WorkspaceItem>), getRemoteDataPayload());
    this.dso$ = this.activatedRoute.data.pipe(map((data: Data) => data.dso as RemoteData<WorkspaceItem>), getRemoteDataPayload());
    this.previousQueryParameters = (this.location.getState() as { [key: string]: any }).previousQueryParams;
  }

    /**
   * Navigates to the previous url
   * If there's not previous url, it continues to the mydspace page instead
   */
    previousPage() {
      this.routeService.getPreviousUrl().pipe(take(1))
        .subscribe((url: string) => {
            let params: Params = {};
            if (!url) {
              url = '/mydspace';
              params = this.previousQueryParameters;
            }
            if (url.split('?').length > 1) {
              for (const param of url.split('?')[1].split('&')) {
                params[param.split('=')[0]] = decodeURIComponent(param.split('=')[1]);
              }
            }
            void this.router.navigate([url.split('?')[0]], { queryParams: params });
          }
        );
    }

  /**
   * Open the modal to confirm the deletion of the workspaceitem
   */
  public async confirmDelete(content) {
   await this.modalService.open(content).result.then(
      (result) => {
        if (result === 'ok') {
         this.sendDeleteRequest();
        }
      }
    );
  }

  /**
   * Delete the target workspaceitem object
   */
  sendDeleteRequest() {
    this.wsi$.pipe(
      switchMap((wsi: WorkspaceItem) => this.workspaceItemService.delete(wsi.id).pipe(
        getFirstCompletedRemoteData(),
      ))
    ).subscribe((response: RemoteData<NoContent>) => {
      if (response.hasSucceeded) {
        const title = this.translationService.get('workspace-item.delete.notification.success.title');
        const content = this.translationService.get('workspace-item.delete.title');
        this.notificationsService.success(title, content);
        this.previousPage();
      } else {
        const title = this.translationService.get('workspace-item.delete.notification.error.title');
        const content = this.translationService.get('workspace-item.delete.notification.error.content');
        this.notificationsService.error(title, content);
      }
    });
  }
}