import {inject, Injectable, Signal, signal} from "@angular/core";
import {PublicationRestService} from "../../core/rest-services/publications/publication.rest-service";
import {MatSnackBar} from "@angular/material/snack-bar"
import {Publication} from "../../core/rest-services/publications/model/publication";

@Injectable()
export class HomeService {
  private publicationRestService = inject(PublicationRestService);
  private snackBar = inject(MatSnackBar);

  #publications = signal<Publication[]>([]);
  #isLoadingSubject = signal<boolean>(false);

  get isLoading(): Signal<boolean> {
    return this.#isLoadingSubject.asReadonly();
  }

  get publications(): Signal<Publication[]> {
    return this.#publications.asReadonly();
  }

  startLatestPublicationsRetrieving(): void {
    this.#isLoadingSubject.set(true);

    this.publicationRestService.getLatest()
      .then(publications => this.#publications.set(publications))
      .catch(error => {
        const errorMessage = $localize`An error occurred while retrieving latest publications...`;
        this.snackBar.open(errorMessage, $localize`Close`, {duration: 5000});
        console.error(errorMessage, error);
      })
      .finally(() => this.#isLoadingSubject.set(false));
  }
}