/*
    * Copyright 2006-2011 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.kew.notification.service.impl;
  
  import java.util.List;
  
  import javax.xml.namespace.QName;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;
  import org.kuali.rice.kcb.dto.MessageDTO;
  import org.kuali.rice.kcb.service.KCBServiceNames;
  import org.kuali.rice.kcb.service.MessagingService;
  import org.kuali.rice.kcb.util.KCBConstants;
  import org.kuali.rice.kew.actionitem.ActionItem;
  import org.kuali.rice.kew.api.WorkflowRuntimeException;
  import org.kuali.rice.kew.api.action.RecipientType;
  import org.kuali.rice.kew.util.KEWConstants;
  
  
  /**
   * NotificationService implementation that delegates to KCB
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class KCBNotificationService extends DefaultNotificationService {
      @Override
      protected void sendNotification(ActionItem actionItem) {
          super.sendNotification(actionItem);
  
          String enableKENNotificationValue = ConfigContext.getCurrentContextConfig().getProperty(KEWConstants.ENABLE_KEN_NOTIFICATION);
          boolean enableKENNotification = Boolean.parseBoolean(enableKENNotificationValue);
          // we only send per-user messages to KCB
          if (!enableKENNotification || !RecipientType.PRINCIPAL.getCode().equals(actionItem.getRecipientTypeCode()))
              return;
  
  
          // send it off to KCB if available
          MessagingService ms = (MessagingService) GlobalResourceLoader.getService(new QName(KCBConstants.SERVICE_NAMESPACE, KCBServiceNames.KCB_MESSAGING));
          if (ms == null) {
          	LOG.info("Could not locate KCB MessagingService.  Message will not be forwarded to the KCB.");
          	return;
          }
          MessageDTO mvo = new MessageDTO();
          mvo.setChannel("KEW");
          mvo.setContent("i'm a kew notification");
          mvo.setContentType("KEW notification");
          mvo.setDeliveryType(actionItem.getActionRequestCd());
          mvo.setProducer("kew@localhost");
          mvo.setTitle(actionItem.getDocLabel() + " - " + actionItem.getDocName() + " - " + actionItem.getDocTitle());
          if (StringUtils.isNotBlank(actionItem.getDocHandlerURL())) {
          	mvo.setUrl(actionItem.getDocHandlerURL() + "?docId=" + actionItem.getDocumentId());
          }
          mvo.setOriginId(String.valueOf(actionItem.getActionItemId()));
          try {
              // just assume it's a user at this point...
              mvo.setRecipient(actionItem.getPrincipalId());
              LOG.debug("Sending message to KCB: " + mvo);
              ms.deliver(mvo);
          } catch (Exception e) {
              throw new WorkflowRuntimeException("could not deliver message to KCB", e);
          }
      }
  
      @Override
      public void removeNotification(List<ActionItem> actionItems) {
      	String enableKENNotificationValue = ConfigContext.getCurrentContextConfig().getProperty(KEWConstants.ENABLE_KEN_NOTIFICATION);
          boolean enableKENNotification = Boolean.parseBoolean(enableKENNotificationValue);
          if (!enableKENNotification) {
          	return;
          }
          MessagingService ms = (MessagingService) GlobalResourceLoader.getService(new QName(KCBConstants.SERVICE_NAMESPACE, KCBServiceNames.KCB_MESSAGING));
  
          for (ActionItem actionItem: actionItems) {
          	LOG.debug("Removing KCB messages for action item: " + actionItem.getActionItemId() + " " + actionItem.getActionRequestCd() + " " + actionItem.getPerson());
              try {
                  // we don't have the action takens at this point...? :(
                  ms.removeByOriginId(String.valueOf(actionItem.getActionItemId()), null, null);
              } catch (Exception e) {
                  throw new RuntimeException("could not remove message from KCB", e);
              }
          }
      }
  }