import 'rxjs/add/operator/do';

import {
  HttpErrorResponse,
  HttpEvent,
  HttpHandler,
  HttpInterceptor,
  HttpRequest,
  HttpResponse
} from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { LogService } from '../services/log.service';
import { AuthService } from '../services/auth.service';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
  constructor(public auth: AuthService, private logger: LogService) {}
  intercept(
    request: HttpRequest<any>,
    next: HttpHandler
  ): Observable<HttpEvent<any>> {
    request = request.clone({
      setHeaders: {
        Authorization: `Bearer ${this.auth.getToken()}`,
        'Cache-Control': 'no-cache', // HTTP 1.1
        Pragma: 'no-cache', // HTTP 1.0
        Expires: '-1' // Proxies
      }
    });
    return next.handle(request).do(
      // (event: HttpEvent<any>) => {
      //   if (event instanceof HttpResponse) {
      //     this.logger.log(event);
      //   }
      // },
      (err: any) => {
        if (err instanceof HttpErrorResponse) {
          if (err.status === 401) {
            this.logger.log(err);
            this.auth.logout();
          }
        }
      }
    );
  }
}