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

@Injectable()
export class SearchPublicationsService {
  #snackBar = inject(MatSnackBar);
  #publicationRestService = inject(PublicationRestService);
  #publications = signal<Publication[]>([]);
  #isLoading = signal(false);
  #isLoaded = signal(false);

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

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

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

  loadPublications(searchCriteria: string): void {
    this.#isLoading.set(true);
    this.#isLoaded.set(false);
    this.#publications.set([]);

    this.#publicationRestService.search(searchCriteria)
      .then(publications => {
        this.#publications.set(publications);
      })
      .catch(error => {
        if (error.status !== 404) {
          const errorMessage = $localize`An error occured while retrieving publications.`;
          console.error(errorMessage, error);
          this.#snackBar.open(errorMessage, $localize`Close`, {duration: 5000});
        }
      })
      .finally(() => {
        this.#isLoading.set(false);
        this.#isLoaded.set(true);
      });
  }
}