/*
    * 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.fit.buildtools;
  
  import java.io.IOException;
  import java.net.URL;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  import javax.servlet.ServletContextEvent;
  import javax.servlet.ServletContextListener;
  import javax.servlet.annotation.WebListener;
  import org.identityconnectors.common.security.SecurityUtil;
  import org.identityconnectors.framework.impl.api.local.ThreadClassLoaderManager;
  import org.identityconnectors.framework.server.ConnectorServer;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.context.ApplicationContext;
  import org.springframework.core.io.Resource;
  import org.springframework.web.context.WebApplicationContext;
  import org.springframework.web.context.support.WebApplicationContextUtils;
  
  @WebListener
  public class ConnectorServerStartStopListener implements ServletContextListener {
  
      private static final Logger LOG = LoggerFactory.getLogger(ConnectorServerStartStopListener.class);
  
      private static final String SERVER = "ConnIdConnectorServer";
  
      /**
       * Build list of URLs from bundles available in the classpath.
       *
       * @param ctx ApplicationContext needed for getting ConnId jar bundles URLs
       */
      private static List<URL> getBundleURLs(final ApplicationContext ctx) {
          final List<URL> bundleURLs = new ArrayList<>();
  
          try {
              for (Resource bundle : ctx.getResources("classpath*:/bundles/*.jar")) {
                  bundleURLs.add(bundle.getURL());
              }
          } catch (IOException e) {
              LOG.error("While getting bundled ConnId bundles", e);
          }
  
          LOG.info("ConnId bundles loaded: " + bundleURLs);
  
          return bundleURLs;
      }
  
      @Override
      public void contextInitialized(final ServletContextEvent sce) {
          ConnectorServer server = ConnectorServer.newInstance();
          WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext());
          try {
              server.setPort(Objects.requireNonNull(ctx).getEnvironment()
                  .getProperty("testconnectorserver.port", Integer.class));
  
              server.setBundleURLs(getBundleURLs(ctx));
  
              server.setKeyHash(SecurityUtil.computeBase64SHA1Hash(
                      ctx.getEnvironment().getProperty("testconnectorserver.key", String.class).toCharArray()));
  
              server.start();
              LOG.info("ConnId connector server listening on port {}", server.getPort());
          } catch (Exception e) {
              LOG.error("Could not start ConnId connector server", e);
          }
  
          sce.getServletContext().setAttribute(SERVER, server);
      }
  
      @Override
      public void contextDestroyed(final ServletContextEvent sce) {
          final ConnectorServer server = (ConnectorServer) sce.getServletContext().getAttribute(SERVER);
          if (server != null && server.isStarted()) {
              server.stop();
          }
          ThreadClassLoaderManager.clearInstance();
      }
  }