/*
    * 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.saml2sp4ui;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.charset.StandardCharsets;
  import javax.ws.rs.core.MediaType;
  import javax.ws.rs.core.Response;
  import org.apache.cxf.jaxrs.client.WebClient;
  import org.apache.syncope.client.ui.commons.BaseSession;
  import org.apache.syncope.client.ui.commons.SAML2SP4UIConstants;
  import org.apache.syncope.client.ui.commons.annotations.Resource;
  import org.apache.syncope.common.rest.api.service.SAML2SP4UIService;
  import org.apache.wicket.Session;
  
  @Resource(
          key = SAML2SP4UIConstants.URL_CONTEXT + ".metadata",
          path = "/" + SAML2SP4UIConstants.URL_CONTEXT + "/metadata")
  public class MetadataResource extends AbstractSAML2SP4UIResource {
  
      private static final long serialVersionUID = -1694048805459648725L;
  
      @Override
      protected ResourceResponse newResourceResponse(final Attributes attributes) {
          SAML2SP4UIService service = BaseSession.class.cast(Session.get()).getAnonymousService(SAML2SP4UIService.class);
          WebClient.client(service).accept(MediaType.APPLICATION_XML_TYPE).type(MediaType.APPLICATION_XML_TYPE);
          Response metadataResponse = service.getMetadata(spEntityID(attributes), SAML2SP4UIConstants.URL_CONTEXT);
          WebClient.client(service).reset();
  
          ResourceResponse response = new ResourceResponse();
          response.disableCaching();
          response.setContentType(MediaType.APPLICATION_XML);
          response.setTextEncoding(StandardCharsets.UTF_8.name());
          response.setWriteCallback(new WriteCallback() {
  
              @Override
              public void writeData(final Attributes attributes) throws IOException {
                  writeStream(attributes, (InputStream) metadataResponse.getEntity());
              }
          });
  
          return response;
      }
  }