/**
    * Copyright 2005-2013 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.kim.impl.responsibility;
  
  import org.kuali.rice.core.api.criteria.Predicate;
  import org.kuali.rice.core.api.criteria.QueryByCriteria;
  import org.kuali.rice.kew.api.KewApiConstants;
  import org.kuali.rice.kim.api.KimConstants;
  import org.kuali.rice.kim.api.responsibility.Responsibility;
  import org.kuali.rice.kim.api.responsibility.ResponsibilityQueryResults;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  import org.kuali.rice.kns.document.MaintenanceDocument;
  import org.kuali.rice.kns.maintenance.rules.MaintenanceDocumentRuleBase;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.apache.commons.lang.StringUtils;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import static org.kuali.rice.core.api.criteria.PredicateFactory.and;
  import static org.kuali.rice.core.api.criteria.PredicateFactory.equal;
  
  /**
   * This is a description of what this class does - kellerj don't forget to fill this in. 
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  public class ReviewResponsibilityMaintenanceDocumentRule extends MaintenanceDocumentRuleBase {
  
  	protected static final String ERROR_MESSAGE_PREFIX = "error.document.kim.reviewresponsibility.";
  	protected static final String ERROR_DUPLICATE_RESPONSIBILITY = ERROR_MESSAGE_PREFIX + "duplicateresponsibility";
      protected static final String ERROR_NAMESPACE_AND_NAME_VALIDATION = ERROR_MESSAGE_PREFIX + "namespaceandnamevalidation";
      protected static final String NAMESPACE_CODE_PROPERTY = "namespaceCode";
  
  	/**
  	 * @see org.kuali.rice.krad.maintenance.rules.MaintenanceDocumentRuleBase#processCustomRouteDocumentBusinessRules(org.kuali.rice.krad.maintenance.MaintenanceDocument)
  	 */
  	@Override
  	protected boolean processCustomRouteDocumentBusinessRules(MaintenanceDocument document) {
  		boolean rulesPassed = true;
  		GlobalVariables.getMessageMap().addToErrorPath( MAINTAINABLE_ERROR_PATH );
  		try {
  			ReviewResponsibilityBo resp = (ReviewResponsibilityBo)document.getNewMaintainableObject().getDataObject();
  			// check for creation of a duplicate node
  			if ( resp.getDocumentTypeName() != null
                      && resp.getRouteNodeName() != null
                      && !checkForDuplicateResponsibility( resp ) ) {
  				GlobalVariables.getMessageMap().putError( "documentTypeName", ERROR_DUPLICATE_RESPONSIBILITY );
  				rulesPassed &= false;
  			}
               if(StringUtils.isNotBlank(resp.getNamespaceCode()) && StringUtils.isNotBlank(resp.getName()) && StringUtils.isBlank(resp.getId())){
                  rulesPassed &=validateNamespaceCodeAndName(resp.getNamespaceCode(),resp.getName());
               }
          } finally {
  			GlobalVariables.getMessageMap().removeFromErrorPath( MAINTAINABLE_ERROR_PATH );
  		}
  		return rulesPassed;
  	}
  
  	protected boolean checkForDuplicateResponsibility( ReviewResponsibilityBo resp ) {
          QueryByCriteria.Builder builder = QueryByCriteria.Builder.create();
          Predicate p = and(
              equal("template.namespaceCode", KewApiConstants.KEW_NAMESPACE ),
              equal("template.name", KewApiConstants.DEFAULT_RESPONSIBILITY_TEMPLATE_NAME),
              equal("attributes[documentTypeName]", resp.getDocumentTypeName())
              // KULRICE-8538 -- Check the route node by looping through the results below.  If it is added
              // into the predicate, no rows are ever returned.
              //equal("attributes[routeNodeName]", resp.getRouteNodeName())
          );
          builder.setPredicates(p);
          ResponsibilityQueryResults results = KimApiServiceLocator.getResponsibilityService().findResponsibilities(builder.build());
          List<Responsibility> responsibilities = new ArrayList<Responsibility>();
  
          if ( !results.getResults().isEmpty() ) {
              for ( Responsibility responsibility : results.getResults() ) {
                  String routeNodeName = responsibility.getAttributes().get( KimConstants.AttributeConstants.ROUTE_NODE_NAME);
                  if (StringUtils.isNotEmpty(routeNodeName) && StringUtils.equals(routeNodeName, resp.getRouteNodeName())){
                      responsibilities.add(responsibility);
                  }
              }
          }
  
  		return responsibilities.isEmpty();
  	}
  
     protected boolean validateNamespaceCodeAndName(String namespaceCode,String name){
         Responsibility responsibility = KimApiServiceLocator.getResponsibilityService().findRespByNamespaceCodeAndName(namespaceCode,name);
 
         if(null != responsibility){
            GlobalVariables.getMessageMap().putError(NAMESPACE_CODE_PROPERTY,ERROR_NAMESPACE_AND_NAME_VALIDATION,namespaceCode,name);
            return false;
         } else {
             return true;
         }
 
     }
 }