/*
    * Copyright 2008-2009 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.kuali.ole.module.purap.PurapConstants;
  import org.kuali.ole.module.purap.PurapKeyConstants;
  import org.kuali.ole.module.purap.businessobject.PurApAccountingLine;
  import org.kuali.ole.module.purap.businessobject.PurApItem;
  import org.kuali.ole.module.purap.document.PurchaseOrderDocument;
  import org.kuali.ole.module.purap.document.service.PurchaseOrderService;
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.ole.sys.document.validation.GenericValidation;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  import java.util.List;
  
  public class PurchaseOrderAmendmentAccountValidation extends GenericValidation {
  
      public boolean validate(AttributedDocumentEvent event) {
  
          boolean valid = true;
          PurchaseOrderDocument poaDocument = (PurchaseOrderDocument) event.getDocument();
          List<PurApItem> items = poaDocument.getItemsActiveOnly();
  
          PurchaseOrderDocument po = SpringContext.getBean(PurchaseOrderService.class).getCurrentPurchaseOrder(poaDocument.getPurapDocumentIdentifier());
          List<PurApItem> poItems = po.getItems();
  
          for (PurApItem item : items) {
              String identifierString = item.getItemIdentifierString();
  
              // check to see if the account has been expired or inactive
              if (item.getItemTypeCode().equals(PurapConstants.ItemTypeCodes.ITEM_TYPE_ITEM_CODE) && item.getSourceAccountingLines() != null && item.getSourceAccountingLines().size() > 0) {
  
                  // check only if there are changes on the item
                  if (isItemChanged(item, poItems)) {
                      List<PurApAccountingLine> accountingLines = item.getSourceAccountingLines();
                      for (PurApAccountingLine accountingLine : accountingLines) {
                          if (accountingLine.getAccount().isExpired()) {
                              valid = false;
                              GlobalVariables.getMessageMap().putError(PurapConstants.ITEM_TAB_ERROR_PROPERTY, PurapKeyConstants.ERROR_ITEM_ACCOUNT_EXPIRED, accountingLine.getAccount().getAccountNumber());
                              break;
                          }
                          if (!accountingLine.getAccount().isActive()) {
                              valid = false;
                              GlobalVariables.getMessageMap().putError(PurapConstants.ITEM_TAB_ERROR_PROPERTY, PurapKeyConstants.ERROR_ITEM_ACCOUNT_INACTIVE, accountingLine.getAccount().getAccountNumber());
                              break;
                          }
                      }
                  }
              }
          }
  
          return valid;
      }
  
      private boolean isItemChanged(PurApItem poaItem, List<PurApItem> poItems) {
  
          boolean changed = false;
  
          int poaItemId = poaItem.getItemLineNumber().intValue();
  
          for (PurApItem poItem : poItems) {
  
              if (poItem.getItemTypeCode().equals(PurapConstants.ItemTypeCodes.ITEM_TYPE_ITEM_CODE) && poaItemId == poItem.getItemLineNumber().intValue()) {
                  // required fields so they cannot be null
                  if (poaItem.getItemQuantity().intValue() != poItem.getItemQuantity().intValue()) {
                      changed = true;
                  }
                  if (!poaItem.getItemUnitOfMeasureCode().equals(poItem.getItemUnitOfMeasureCode())) {
                      changed = true;
                  }
                  if (poaItem.getItemUnitPrice().floatValue() != poItem.getItemUnitPrice().floatValue()) {
                      changed = true;
                  }
                  if (poaItem.getTotalAmount().floatValue() != poItem.getTotalAmount().floatValue()) {
                      changed = true;
                  }
                  if (poaItem.getItemAssignedToTradeInIndicator() != poItem.getItemAssignedToTradeInIndicator()) {
                      changed = true;
                  }
                  // optional fields
                  if ((poaItem.getItemCatalogNumber() != null && !poaItem.getItemCatalogNumber().equals(poItem.getItemCatalogNumber())) ||
                          (poItem.getItemCatalogNumber() != null && !poItem.getItemCatalogNumber().equals(poaItem.getItemCatalogNumber()))) {
                      changed = true;
                  }
                 if ((poaItem.getItemDescription() != null && !poaItem.getItemDescription().equals(poItem.getItemDescription())) ||
                         (poItem.getItemDescription() != null && !poItem.getItemDescription().equals(poaItem.getItemDescription()))) {
                     changed = true;
                 }
                 if ((poaItem.getExtendedPrice() != null && poItem.getExtendedPrice() != null && poaItem.getExtendedPrice().floatValue() != poItem.getExtendedPrice().floatValue()) ||
                         (poaItem.getExtendedPrice() != null && poaItem.getExtendedPrice().floatValue() != 0 && poItem.getExtendedPrice() == null) ||
                         (poaItem.getExtendedPrice() == null && poItem.getExtendedPrice() != null && poItem.getExtendedPrice().floatValue() != 0)) {
                     changed = true;
                 }
                 if ((poaItem.getItemTaxAmount() != null && poItem.getItemTaxAmount() != null && poaItem.getItemTaxAmount().floatValue() != poItem.getItemTaxAmount().floatValue()) ||
                         (poaItem.getItemTaxAmount() != null && poaItem.getItemTaxAmount().floatValue() != 0 && poItem.getItemTaxAmount() != null) ||
                         (poaItem.getItemTaxAmount() == null && poItem.getItemTaxAmount() != null && poItem.getItemTaxAmount().floatValue() != 0)) {
                     changed = true;
                 }
 
                 break;
             }
         }
 
         return changed;
     }
 }