/*
 * Copyright (c) 2022. Deutsche Telekom AG
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */


import { Injectable } from '@angular/core';
import { AuthConfig, NullValidationHandler, OAuthService } from 'angular-oauth2-oidc';

@Injectable()
export class AuthConfigService {
  constructor(private readonly oauthService: OAuthService, private readonly authConfig: AuthConfig) {}

  async initAuth(): Promise<any> {
    return new Promise<void>((resolveFn, rejectFn) => {
      // setup oauthService
      this.oauthService.configure(this.authConfig);
      this.oauthService.tokenValidationHandler = new NullValidationHandler();

      this.oauthService.loadDiscoveryDocumentAndLogin().then(isLoggedIn => {
        if (isLoggedIn) {
          this.oauthService.setupAutomaticSilentRefresh();
          resolveFn();
        } else {
          this.oauthService.initImplicitFlow();
          rejectFn();
        }
      }).catch(() => {
        //@ts-ignore
        window.location.href = './keycloak-error.html'
      });
    });
  }
}