/*
    * Copyright 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.ole.module.purap.document.validation.impl;
  
  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.document.PurchasingAccountsPayableDocument;
  import org.kuali.ole.sys.document.validation.GenericValidation;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  public class PurchasingProcessTradeInValidation extends GenericValidation {
  
      /**
       * Validates that the total cost must be greater or equal to zero.
       *
       * @param purDocument the purchasing document to be validated
       * @return boolean false if the total cost is less than zero.
       */
      public boolean validate(AttributedDocumentEvent event) {
          boolean isAssignedToTradeInItemFound = false;
          PurchasingAccountsPayableDocument purapDocument = (PurchasingAccountsPayableDocument) event.getDocument();
          for (PurApItem item : purapDocument.getItems()) {
              // Refresh the item type for validation.
              item.refreshReferenceObject(PurapPropertyConstants.ITEM_TYPE);
  
              if (item.getItemType().isLineItemIndicator()) {
                  if (item.getItemAssignedToTradeInIndicator()) {
                      isAssignedToTradeInItemFound = true;
                      break;
                  }
              }
          }
          if (!isAssignedToTradeInItemFound) {
              PurApItem tradeInItem = purapDocument.getTradeInItem();
              if (tradeInItem != null && tradeInItem.getItemUnitPrice() != null) {
                  GlobalVariables.getMessageMap().putError(PurapConstants.ITEM_TAB_ERROR_PROPERTY, PurapKeyConstants.ERROR_ITEM_TRADE_IN_NEEDS_TO_BE_ASSIGNED);
                  return false;
              }
          }
          return true;
      }
  }