import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable, ReplaySubject, tap } from 'rxjs';
import { Navigation } from 'app/core/navigation/navigation.types';

@Injectable({
  providedIn: 'root',
})
export class NavigationService {
  private _navigation: ReplaySubject<Navigation> =
    new ReplaySubject<Navigation>(1);

  /**
   * Constructor
   */
  constructor(private _httpClient: HttpClient) {}

  // -----------------------------------------------------------------------------------------------------
  // @ Accessors
  // -----------------------------------------------------------------------------------------------------

  /**
   * Getter for navigation
   */
  get navigation$(): Observable<Navigation> {
    return this._navigation.asObservable();
  }

  // -----------------------------------------------------------------------------------------------------
  // @ Public methods
  // -----------------------------------------------------------------------------------------------------

  /**
   * Get all navigation data
   */
  get(): Observable<Navigation> {
    return this._httpClient.get<Navigation>('api/common/navigation').pipe(
      tap((navigation) => {
        this._navigation.next(navigation);
      })
    );
  }
}