/*
    * Copyright 2005-2007 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.help.web;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.kuali.rice.core.util.RiceConstants;
  import org.kuali.rice.kew.export.ExportDataSet;
  import org.kuali.rice.kew.export.web.ExportServlet;
  import org.kuali.rice.kew.help.HelpEntry;
  import org.kuali.rice.kew.help.service.HelpService;
  import org.kuali.rice.kew.service.KEWServiceLocator;
  import org.kuali.rice.kew.util.KEWConstants;
  import org.kuali.rice.kew.web.KewKualiAction;
  import org.kuali.rice.kns.exception.ValidationException;
  import org.kuali.rice.kns.util.GlobalVariables;
  import org.kuali.rice.kns.util.KNSConstants;
  
  
  /**
   * Struts action for interfacing with the Help system.
   *
   * @see HelpService
   * @see HelpEntry
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class HelpAction extends KewKualiAction {
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(HelpAction.class);
      private static final String HELP_ID_KEY = "helpId";
      private static final String ID_INVALID = "helpentry.id.invalid";
  
  
      public ActionForward save(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
          HelpForm helpForm = (HelpForm) form;
          HelpEntry helpEntry = helpForm.getHelpEntry();
          getHelpService().save(helpEntry);
          GlobalVariables.getMessageMap().putInfo(KNSConstants.GLOBAL_MESSAGES, "helpentry.saved");
          return mapping.findForward("summary");
      }
  
      public ActionForward delete(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception{
      	HelpForm helpForm=(HelpForm)form;
      	HelpEntry helpEntry=helpForm.getHelpEntry();
      	LOG.info(helpEntry.getHelpName());
      	getHelpService().delete(helpEntry);
          helpForm.setShowDelete("no");
          GlobalVariables.getMessageMap().putInfo(KNSConstants.GLOBAL_MESSAGES, "helpentry.deleted");
      	return mapping.findForward("delete");
      }
  
      public ActionForward getSearch (ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
      	LOG.debug("getSearch");
          HelpForm helpForm = (HelpForm) form;
          // TODO hook up KIM permissions to this
          helpForm.setIsAdmin(false);
         	return mapping.findForward("getSearch");
      }
  
      public ActionForward search (ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
          HelpForm helpForm = (HelpForm) form;
          HelpEntry helpEntry = helpForm.getHelpEntry();
          if(helpForm.getHelpId() != null && !StringUtils.isNumeric(helpForm.getHelpId())){
              GlobalVariables.getMessageMap().putError(HELP_ID_KEY, ID_INVALID);
          } else {
              if (helpForm.getHelpId() != null) {
                  helpEntry.setHelpId(new Long(helpForm.getHelpId()));
              }
          }
  
          List searchResults = getHelpService().search(helpEntry);
  
          if(searchResults != null && searchResults.size() > 0){
              request.setAttribute("reqSearchResults", searchResults);
          }
          // TODO hook up KIM permissions to this
          helpForm.setIsAdmin(false);
 
         return mapping.findForward("getSearch");
     }
 
     public ActionForward clearSearch (ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
         HelpForm helpForm = (HelpForm) form;
         helpForm.getHelpEntry().setHelpId(null);
         helpForm.getHelpEntry().setHelpName(null);
         helpForm.getHelpEntry().setHelpText(null);
         request.setAttribute("reqSearchResults", null);
         // TODO hook up KIM permissions to this
         helpForm.setIsAdmin(false);
         return mapping.findForward("getSearch");
     }
 
     public ActionForward report(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
         HelpForm helpForm = (HelpForm) form;
         helpForm.setHelpEntry(getHelpService().findById(new Long(request.getParameter("helpId"))));
         return mapping.findForward("report");
     }
 
     public ActionForward showEdit(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
         HelpForm helpForm = (HelpForm) form;
         if(helpForm.getHelpEntry().getHelpId() == null){
             Long helpId = new Long(request.getParameter("helpId"));
             helpForm.setHelpEntry(getHelpService().findById(helpId));
         }
         return mapping.findForward("basic");
     }
 
     public ActionForward showDelete(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception{
     	HelpForm helpForm=(HelpForm)form;
     	if(helpForm.getHelpEntry().getHelpId()==null){
     		Long helpId=new Long(request.getParameter("helpId"));
     		helpForm.setHelpEntry(getHelpService().findById(helpId));
     	}
         // TOOD hook up KIM permissions to this
         helpForm.setIsAdmin(false);
     	return mapping.findForward("delete");
     }
 
     private HelpService getHelpService(){
         return  (HelpService) KEWServiceLocator.getService(KEWServiceLocator.HELP_SERVICE);
     }
 
     public ActionForward getHelpEntry(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
         HelpForm helpForm = (HelpForm) form;
         String helpKey = request.getParameter("helpKey");
         helpForm.setHelpEntry(getHelpService().findByKey(helpKey));
         helpForm.setShowEdit(KEWConstants.NO_LABEL);
         return mapping.findForward("popHelp");
     }
 
     /**
      * TODO implement the help search as a lookupable, rendering this code redundant
      */
     public ActionForward export(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
         HelpForm helpForm = (HelpForm) form;
         HelpEntry helpEntry = helpForm.getHelpEntry();
         List searchResults = getHelpService().search(helpEntry);
         if(searchResults == null) {
         	searchResults = new ArrayList();
         }
         ExportDataSet dataSet = new ExportDataSet();
         dataSet.getHelp().addAll(searchResults);
         request.getSession().setAttribute(ExportServlet.EXPORT_DATA_SET_KEY, dataSet);
         return new ActionForward(ExportServlet.generateExportPath(request, dataSet), true);
     }
 
 }