import { Injectable } from "@angular/core";
import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor } from "@angular/common/http";
import { Observable } from "rxjs";

import { AuthenticationService } from "../services/authentication.service";


@Injectable()
export class JwtAuthInterceptor implements HttpInterceptor {
  
  constructor(private authenticationService: AuthenticationService) {}

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // add authorization header with basic auth credentials if available
    const currentUser = this.authenticationService.currentUserValue;
    
    if (currentUser && currentUser.token) {
      request = request.clone({
        setHeaders: {
          Authorization: `Bearer ${currentUser.token}`
        }
      });
    }

    return next.handle(request);
  }
}
