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

import { config } from "../config";
import { AuthService } from "../shared/services/auth.service";

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

constructor(private authService: AuthService) { }

intercept(req: HttpRequest<any>, next: HttpHandler):
Observable<HttpEvent<any>> {

    let headers = {
        'Accept': 'application/json',
        'Authorization': `Bearer ${localStorage.getItem('access_token')}`,
        'Ocp-Apim-Subscription-Key': config.subscriptionKey
    }

    if (req.url.includes(`${config.apiBaseUrl}auth/login`)) {

        headers['Authorization'] = 'Basic ' + btoa(this.authService.username
                                          + ':' + this.authService.password);

    } else if (req.url.includes(config.notificationApiBaseUrl)) {

        headers['Ocp-Apim-Subscription-Key'] =
    config.notificationSubscriptionKey;
        }

        const modified = req.clone({
            setHeaders: headers
        });

        return next.handle(modified);
    }
}