/**
    * Copyright 2005-2011 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.ksb.messaging.web;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.log4j.Logger;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.apache.struts.action.ActionMessages;
  import org.kuali.rice.core.api.config.CoreConfigHelper;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.core.api.util.RiceUtilities;
  import org.kuali.rice.ksb.api.KsbApiServiceLocator;
  import org.kuali.rice.ksb.api.bus.Endpoint;
  import org.kuali.rice.ksb.api.bus.ServiceBus;
  import org.kuali.rice.ksb.api.bus.ServiceConfiguration;
  import org.kuali.rice.ksb.api.registry.ServiceInfo;
  import org.kuali.rice.ksb.api.registry.ServiceRegistry;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.xml.namespace.QName;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  
  /**
   * Struts action for interacting with the queue of messages.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class ServiceRegistryAction extends KSBAction {
  
  	private static final String REMOVED_APPLICATION_ID_PARAM = "removedApplicationId";
      private static final Logger LOG = Logger.getLogger(ServiceRegistryAction.class);
  
      public ActionForward start(ActionMapping mapping, ActionForm form, HttpServletRequest request,
  	    HttpServletResponse response) throws IOException, ServletException {
  	return mapping.findForward("basic");
      }
  
      public ActionForward refreshServiceRegistry(ActionMapping mapping, ActionForm form, HttpServletRequest request,
      	HttpServletResponse response) throws IOException, ServletException {
      	// TODO is this what really constitutes a "refresh" of the service registry?
      	KsbApiServiceLocator.getServiceBus().synchronize();
      	return mapping.findForward("basic");
      }
      
  	/**
       * Enable deletion of localhost service registry entries.
       */
      public ActionForward deleteLocalhostEntries(ActionMapping mapping, ActionForm form, HttpServletRequest request,
          	HttpServletResponse response) throws IOException, ServletException {
      	ServiceRegistry serviceRegistry = KsbApiServiceLocator.getServiceRegistry();
      	List<ServiceInfo> serviceInfos = serviceRegistry.getAllOnlineServices();
      	List<String> serviceEndpointsToDelete = new ArrayList<String>();
      	for (ServiceInfo serviceInfo : serviceInfos) {
      		if (serviceInfo.getServerIpAddress().equals("localhost")) {
      			serviceEndpointsToDelete.add(serviceInfo.getServiceId());
      		}
      	}
      	serviceRegistry.removeServiceEndpoints(serviceEndpointsToDelete);
      	KsbApiServiceLocator.getServiceBus().synchronize();
  		return mapping.findForward("basic");
      }
  
      public ActionForward deleteApplicationIdEntries(ActionMapping mapping, ActionForm form, HttpServletRequest request,
              HttpServletResponse response) throws IOException, ServletException {
          
          final String applicationId = request.getParameter(REMOVED_APPLICATION_ID_PARAM);
          if(StringUtils.isNotBlank(applicationId)) {
              ServiceRegistry serviceRegistry = KsbApiServiceLocator.getServiceRegistry();
              List<ServiceInfo> serviceInfos = serviceRegistry.getAllOnlineServices();
              List<String> serviceEndpointsToDelete = new ArrayList<String>();
              for (ServiceInfo serviceInfo : serviceInfos) {
                  if (serviceInfo.getApplicationId().equals(applicationId)) {
                      serviceEndpointsToDelete.add(serviceInfo.getServiceId());
                  }
              }
              serviceRegistry.removeServiceEndpoints(serviceEndpointsToDelete);
              KsbApiServiceLocator.getServiceBus().synchronize();
          } else {
             LOG.info("No rows were deleted from the KRSB_SVC_DEF_T table because the application ID was null or blank.");
         }
 
         return mapping.findForward("basic");
     }
 
     public ActionMessages establishRequiredState(HttpServletRequest request, ActionForm actionForm) throws Exception {
 	ServiceRegistryForm form = (ServiceRegistryForm)actionForm;
 	form.setMyIpAddress(RiceUtilities.getIpNumber());
 	form.setMyApplicationId(CoreConfigHelper.getApplicationId());
 	form.setDevMode(ConfigContext.getCurrentContextConfig().getDevMode());
 	ServiceBus serviceBus = KsbApiServiceLocator.getServiceBus();
 	form.setMyInstanceId(serviceBus.getInstanceId());
 	form.setPublishedServices(getPublishedServices(serviceBus));
 	ServiceRegistry serviceRegistry = KsbApiServiceLocator.getServiceRegistry();
 	form.setGlobalRegistryServices(getGlobalRegistryServices(serviceRegistry));
 
 	return null;
     }
 
     private List<ServiceConfiguration> getPublishedServices(ServiceBus serviceBus) {
     	Map<QName, Endpoint> localEndpoints = serviceBus.getLocalEndpoints();
     	List<ServiceConfiguration> publishedServices = new ArrayList<ServiceConfiguration>();
     	for (Endpoint endpoint : localEndpoints.values()) {
     		publishedServices.add(endpoint.getServiceConfiguration());
     	}
     	return publishedServices;
     }
 
     private List<ServiceInfo> getGlobalRegistryServices(ServiceRegistry serviceRegistry) {
     	return serviceRegistry.getAllServices();
     }
 
 }