import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { ToasterService, Toast } from 'angular2-toaster';
import { TranslateService } from '@ngx-translate/core';
import {Observable} from 'rxjs/Observable';

@Injectable()
export class SharedService {
  // Observable lang Source 
  private _languageSource = new BehaviorSubject<string>('en');
  private _breadcrumbSource = new BehaviorSubject<string>('home');
  breadCrumb$ = this._breadcrumbSource.asObservable();
  // Observable lang stream
  language$ = this._languageSource.asObservable();

  constructor(private toasterService: ToasterService,
    private translate: TranslateService) {
  }


  // service command
  changeLanguage(lang) {
    this._languageSource.next(lang);
  }
  // service command
  changeBreadCrumb(breadcrumb) {
    this._breadcrumbSource.next(breadcrumb);
  }

  public popFailure = (body: string) => {
    this.popToast('error', 'toaster-title-failure', body);
  }

  public popSuccess = (body: string) => {
    this.popToast('success', 'toaster-title-success', body);
  }

  // control the loading screen
  private _loaderSource = new BehaviorSubject<boolean>(false);
  public $loader = this._loaderSource.asObservable();
  public showLoader(show: boolean) {
    this._loaderSource.next(show);
  }

  private _pdfDataReady = new BehaviorSubject<any>(null);
  public $pdfDataReady = this._pdfDataReady.asObservable();
  public pdfDataRready(pdfData) {
    this._pdfDataReady.next(pdfData);
  }

  public popToast = (toastType: string, title: string, body: string) => {
    this.toasterService.pop(<Toast>{
      type: toastType,
      title: this.translate.instant(title),
      body: this.translate.instant(body)
    });
  }
}