import { Injectable } from '@angular/core';
import {
  HttpRequest,
  HttpHandler,
  HttpEvent,
  HttpInterceptor,
  HttpErrorResponse
} from '@angular/common/http';
import { AuthService } from '../services/auth.service';
import { Observable, of, throwError } from 'rxjs';
import { Router } from '@angular/router';
import { catchError, map } from 'rxjs/operators';
import { HttpClient } from '@angular/common/http';
import { ApiResult } from '../models/apiresult.model';

@Injectable()
export class TokenInterceptor implements HttpInterceptor {

  constructor(
    public auth: AuthService,
    private router: Router,
    private http:HttpClient
  ) { }

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    console.log(request);
    if (request.url == '/api/authenticate/refreshaccesstoken' || request.url.includes('registration')) {
      return next.handle(request);
    }
    let refreshtoken = {
      "refreshtoken": ''
    };
    if (this.auth.getRefreshToken() != null) refreshtoken.refreshtoken = this.auth.getRefreshToken();
    if (this.auth.isLoggedIn()) {
      request = request.clone({
        setHeaders: {
          Authorization: `Bearer ${this.auth.getToken()}`
        }
      });
      return next.handle(request).pipe();
    }
    if (request.url == "/api/authenticate") {
      return next.handle(request);
    }
    let sub = null;

    let observable = new Observable<HttpEvent<any>>((subscriber) => {

      let originalRequestSubscription = next.handle(request).subscribe((resp) => {

        console.log(resp);
       this.http.post<ApiResult<JWT>>('/api/authenticate/refreshaccesstoken', refreshtoken).pipe(map(res => {
          return res;
        })).subscribe(data => {
          console.log(data.data);
          sub = this.auth.refreshToken(data.data);
          return observable;
         });
        subscriber.next();
      }
      );

      return () => {
        originalRequestSubscription.unsubscribe();
      }
    });
    console.log(sub);
    return observable;
  }




}