/*
    * Copyright 2007-2008 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.kns.web.struts.action;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.TreeMap;
  
  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.kns.bo.BusinessObject;
  import org.kuali.rice.kns.datadictionary.InactivationBlockingMetadata;
  import org.kuali.rice.kns.service.DataDictionaryService;
  import org.kuali.rice.kns.service.InactivationBlockingDisplayService;
  import org.kuali.rice.kns.service.KNSServiceLocator;
  import org.kuali.rice.kns.util.ObjectUtils;
  import org.kuali.rice.kns.web.struts.form.DisplayInactivationBlockersForm;
  
  /**
   * This is a description of what this class does - wliang don't forget to fill this in. 
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  public class DisplayInactivationBlockersAction extends KualiAction {
  	
  	public ActionForward displayAllInactivationBlockers(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
  		DisplayInactivationBlockersForm displayInactivationBlockersForm = (DisplayInactivationBlockersForm) form;
  		DataDictionaryService dataDictionaryService = KNSServiceLocator.getDataDictionaryService();
  		InactivationBlockingDisplayService inactivationBlockingDisplayService = KNSServiceLocator.getInactivationBlockingDisplayService();
  		
  		Class blockedBoClass = Class.forName(displayInactivationBlockersForm.getBusinessObjectClassName());
  		BusinessObject blockedBo = (BusinessObject) blockedBoClass.newInstance();
  		for (String key : displayInactivationBlockersForm.getPrimaryKeyFieldValues().keySet()) {
  			ObjectUtils.setObjectProperty(blockedBo, key, displayInactivationBlockersForm.getPrimaryKeyFieldValues().get(key));
  		}
  		
  		Map<String, List<String>> allBlockers = new TreeMap<String, List<String>>();
  		
  		Set<InactivationBlockingMetadata> inactivationBlockers = dataDictionaryService.getAllInactivationBlockingDefinitions(blockedBoClass);
  		for (InactivationBlockingMetadata inactivationBlockingMetadata : inactivationBlockers) {
  			String blockingBoLabel = dataDictionaryService.getDataDictionary().getBusinessObjectEntry(inactivationBlockingMetadata.getBlockingReferenceBusinessObjectClass().getName()).getObjectLabel();
  			String relationshipLabel = inactivationBlockingMetadata.getRelationshipLabel();
  			String displayLabel;
  			if (StringUtils.isEmpty(relationshipLabel)) {
  				displayLabel = blockingBoLabel;
  			}
  			else {
  				displayLabel = blockingBoLabel + " (" + relationshipLabel + ")";
  			}
  			List<String> blockerObjectList = inactivationBlockingDisplayService.listAllBlockerRecords(blockedBo, inactivationBlockingMetadata);
  			
  			if (!blockerObjectList.isEmpty()) {
  				List<String> existingList = allBlockers.get(displayLabel);
  				if (existingList != null) {
  					existingList.addAll(blockerObjectList);
  				}
  				else {
  					allBlockers.put(displayLabel, blockerObjectList);
  				}
  			}
  		}
  		
  		displayInactivationBlockersForm.setBlockingValues(allBlockers);
  		
  		return mapping.findForward(RiceConstants.MAPPING_BASIC);
  	}
  }