import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { SwPush } from '@angular/service-worker';
import { environment } from '../../../environment';
import { CookiesService } from '../cookies/cookies.service';

@Injectable({
  providedIn: 'root'
})
export class PushService {
  readonly VAPID_PUBLIC_KEY = 'BMbmo9BUsveiD6z8_WPVQBCSA3uTbA40t9wgDaYXL9zzobV_GO3yLUux18GOvL1DcIEGpxMlgA-uDr3zOFABLGw';

  private apiURL = environment.apiURL;

  constructor(private swPush: SwPush, private http: HttpClient, private cookiesService: CookiesService) { }

  enableNotifications() {
    Notification.requestPermission().then(permission => {
      if (permission === 'granted') {
        this.subscribeToNotifications();
      }
    });
  }

  subscribeToNotifications() {
    this.swPush.requestSubscription({
      serverPublicKey: this.VAPID_PUBLIC_KEY
    }).then(subscription => {
      this.sendSubscriptionToServer(subscription).subscribe();
    }).catch(error => {
      console.error('Subscription to notifications failed:', error);
    });
  }

  sendSubscriptionToServer(subscription: PushSubscription) {
    const url = `${this.apiURL}/push/subscribe`;
    // Obligé de récupérer le token ici car injecter le service dans le constructeur de AuthService provoque une boucle infinie
    const token = this.cookiesService.getToken();
    const headers = new HttpHeaders().set('Authorization', `Bearer ${token}`);
    headers.set('Content-Type', 'application/json');

    return this.http.post<any>(url, subscription, { headers });
  }

  unsubscribe(): Promise<void> {
    return this.swPush.unsubscribe();
  }
}