/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.
   */
  package org.apache.syncope.client.ui.commons.resources.oidcc4ui;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.ws.rs.core.HttpHeaders;
  import javax.ws.rs.core.Response;
  import org.apache.commons.lang3.StringUtils;
  import org.apache.syncope.client.ui.commons.BaseSession;
  import org.apache.syncope.client.ui.commons.annotations.Resource;
  import org.apache.syncope.client.ui.commons.panels.OIDCC4UIConstants;
  import org.apache.syncope.common.lib.oidc.OIDCConstants;
  import org.apache.syncope.common.lib.oidc.OIDCRequest;
  import org.apache.syncope.common.rest.api.service.OIDCC4UIService;
  import org.apache.wicket.Session;
  import org.apache.wicket.request.resource.AbstractResource;
  
  @Resource(
          key = OIDCC4UIConstants.URL_CONTEXT + ".login",
          path = "/" + OIDCC4UIConstants.URL_CONTEXT + "/login")
  public class LoginResource extends AbstractResource {
  
      private static final long serialVersionUID = -3076690953674174306L;
  
      @Override
      protected ResourceResponse newResourceResponse(final Attributes attributes) {
          String op = attributes.getRequest().getQueryParameters().
                  getParameterValue(OIDCC4UIConstants.PARAM_OP).toString();
  
          HttpServletRequest request = (HttpServletRequest) attributes.getRequest().getContainerRequest();
          String redirectURI = StringUtils.substringBefore(
                  request.getRequestURL().toString(), "/login") + "/code-consumer";
  
          OIDCC4UIService service = BaseSession.class.cast(Session.get()).getAnonymousService(OIDCC4UIService.class);
          OIDCRequest loginRequest = service.createLoginRequest(redirectURI, op);
  
          Session.get().setAttribute(OIDCConstants.OP, op);
  
          ResourceResponse response = new ResourceResponse();
          response.setStatusCode(Response.Status.FOUND.getStatusCode());
          response.getHeaders().addHeader(HttpHeaders.CACHE_CONTROL, "no-cache, no-store");
          response.getHeaders().addHeader("Pragma", "no-cache");
          response.getHeaders().addHeader(HttpHeaders.LOCATION, loginRequest.getLocation());
  
          return response;
      }
  }