/*
    * Copyright 2009 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.ole.module.purap.document.validation.impl;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.ole.module.purap.PurapConstants;
  import org.kuali.ole.module.purap.PurapKeyConstants;
  import org.kuali.ole.module.purap.PurapPropertyConstants;
  import org.kuali.ole.module.purap.businessobject.PurApItem;
  import org.kuali.ole.module.purap.businessobject.PurchasingItemBase;
  import org.kuali.ole.sys.OLEKeyConstants;
  import org.kuali.ole.sys.OLEPropertyConstants;
  import org.kuali.ole.sys.businessobject.UnitOfMeasure;
  import org.kuali.ole.sys.document.validation.GenericValidation;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.kns.service.DataDictionaryService;
  import org.kuali.rice.krad.service.BusinessObjectService;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class PurchasingUnitOfMeasureValidation extends GenericValidation {
  
      private PurApItem itemForValidation;
      private DataDictionaryService dataDictionaryService;
      private BusinessObjectService businessObjectService;
  
      /**
       * Validates that if the item type is quantity based, the unit of measure is required.
       */
      @Override
      public boolean validate(AttributedDocumentEvent event) {
          boolean valid = true;
          PurchasingItemBase purItem = (PurchasingItemBase) itemForValidation;
          GlobalVariables.getMessageMap().addToErrorPath(PurapConstants.ITEM_TAB_ERRORS);
  
          // Validations for quantity based item type
          if (purItem.getItemType().isQuantityBasedGeneralLedgerIndicator()) {
              String uomCode = purItem.getItemUnitOfMeasureCode();
              if (StringUtils.isEmpty(uomCode)) {
                  valid = false;
                  String attributeLabel = dataDictionaryService.getDataDictionary().getBusinessObjectEntry(purItem.getClass().getName()).
                          getAttributeDefinition(OLEPropertyConstants.ITEM_UNIT_OF_MEASURE_CODE).
                          getLabel();
                  GlobalVariables.getMessageMap().putError(OLEPropertyConstants.ITEM_UNIT_OF_MEASURE_CODE, OLEKeyConstants.ERROR_REQUIRED, attributeLabel + " in " + purItem.getItemIdentifierString());
              } else {
                  //Find out whether the unit of measure code has existed in the database
                  Map<String, String> fieldValues = new HashMap<String, String>();
                  fieldValues.put(OLEPropertyConstants.ITEM_UNIT_OF_MEASURE_CODE, purItem.getItemUnitOfMeasureCode());
                  if (businessObjectService.countMatching(UnitOfMeasure.class, fieldValues) != 1) {
                      //This is the case where the unit of measure code on the item does not exist in the database.
                      valid = false;
                      GlobalVariables.getMessageMap().putError(OLEPropertyConstants.ITEM_UNIT_OF_MEASURE_CODE, PurapKeyConstants.PUR_ITEM_UNIT_OF_MEASURE_CODE_INVALID, " in " + purItem.getItemIdentifierString());
                  }
              }
          }
  
          GlobalVariables.getMessageMap().clearErrorPath();
  
          // MSU Contribution OLEMI-5041 DTT-3371 OLECNTRB-955
          if (purItem.getItemType().isAmountBasedGeneralLedgerIndicator()
                  && StringUtils.isNotBlank(purItem.getItemUnitOfMeasureCode())) {
              valid = false;
              String errorPrefix = OLEPropertyConstants.DOCUMENT + "." + PurapPropertyConstants.ITEM + "["
                      + (itemForValidation.getItemLineNumber() - 1) + "]."
                      + PurapPropertyConstants.ITEM_UNIT_OF_MEASURE_CODE;
              String attributeLabel = dataDictionaryService.getDataDictionary()
                      .getBusinessObjectEntry(purItem.getClass().getName())
                      .getAttributeDefinition(PurapPropertyConstants.ITEM_UNIT_OF_MEASURE_CODE).getLabel();
              GlobalVariables.getMessageMap().putError(errorPrefix, PurapKeyConstants.ERROR_ITEM_UOM_NOT_ALLOWED,
                      attributeLabel + " in " + purItem.getItemIdentifierString());
          }
  
          return valid;
      }
  
      public PurApItem getItemForValidation() {
          return itemForValidation;
      }
  
      public void setItemForValidation(PurApItem itemForValidation) {
          this.itemForValidation = itemForValidation;
      }
  
      public DataDictionaryService getDataDictionaryService() {
         return dataDictionaryService;
     }
 
     public void setDataDictionaryService(DataDictionaryService dataDictionaryService) {
         this.dataDictionaryService = dataDictionaryService;
     }
 
     public BusinessObjectService getBusinessObjectService() {
         return businessObjectService;
     }
 
     public void setBusinessObjectService(BusinessObjectService businessObjectService) {
         this.businessObjectService = businessObjectService;
     }
 
 }