import { Injectable } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';

/**
 * Service serves storage role for AuthRedirectService.
 * Used by AuthStatePersistenceService to store redirect url for OAuth flows that rely on redirects.
 */
@Injectable({
  providedIn: 'root',
})
export class AuthRedirectStorageService {
  constructor() {}

  private redirectUrl$: Observable<string | undefined> = new BehaviorSubject<
    string | undefined
  >(undefined);

  /**
   * Get redirect url after logging in.
   *
   * @returns observable with the redirect url as string
   */
  getRedirectUrl(): Observable<string | undefined> {
    return this.redirectUrl$;
  }

  /**
   * Set url to redirect to after login.
   *
   * @param redirectUrl
   */
  setRedirectUrl(redirectUrl: string | undefined): void {
    (this.redirectUrl$ as BehaviorSubject<string | undefined>).next(
      redirectUrl
    );
  }
}