/*
    * 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.businessobject.PurApAccountingLine;
  import org.kuali.ole.module.purap.businessobject.PurApItem;
  import org.kuali.ole.module.purap.document.validation.PurchasingAccountsPayableItemPreCalculationRule;
  import org.kuali.rice.kns.rules.DocumentRuleBase;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  import java.math.BigDecimal;
  
  public class PurchasingAccountsPayablesItemPreCalculateDocumentRule extends DocumentRuleBase implements PurchasingAccountsPayableItemPreCalculationRule {
  
      public boolean checkPercentOrTotalAmountsEqual(PurApItem item) {
          boolean valid = true;
  
          valid &= validatePercent(item);
  
          if (valid) {
              valid &= validateTotalAmount(item);
          }
  
          return valid;
      }
  
      /**
       * Verifies account percent. If the total percent does not equal 100, the validation fails.
       */
      public boolean validatePercent(PurApItem item) {
          boolean valid = true;
  
          // validate that the percents total 100 for each item
          BigDecimal totalPercent = BigDecimal.ZERO;
          BigDecimal desiredPercent = new BigDecimal("100");
          for (PurApAccountingLine account : item.getSourceAccountingLines()) {
              if (account.getAccountLinePercent() != null) {
                  totalPercent = totalPercent.add(account.getAccountLinePercent());
              } else {
                  totalPercent = totalPercent.add(BigDecimal.ZERO);
              }
          }
          if (desiredPercent.compareTo(totalPercent) != 0) {
              GlobalVariables.getMessageMap().putError(PurapConstants.ITEM_TAB_ERROR_PROPERTY, PurapKeyConstants.ERROR_ITEM_ACCOUNTING_TOTAL, item.getItemIdentifierString());
              valid = false;
          }
  
          return valid;
      }
  
      /**
       * Verifies account total. If the total does not equal item total,
       * the validation fails.
       */
      public boolean validateTotalAmount(PurApItem item) {
          boolean valid = true;
  
          // validate that the amount total
          BigDecimal totalAmount = BigDecimal.ZERO;
          BigDecimal desiredAmount =
                  (item.getTotalAmount() == null) ? new BigDecimal(0) : item.getTotalAmount().bigDecimalValue();
          for (PurApAccountingLine account : item.getSourceAccountingLines()) {
              if (account.getAmount() != null) {
                  totalAmount = totalAmount.add(account.getAmount().bigDecimalValue());
              } else {
                  totalAmount = totalAmount.add(BigDecimal.ZERO);
              }
          }
          if (desiredAmount.compareTo(totalAmount) != 0) {
              GlobalVariables.getMessageMap().putError(PurapConstants.ITEM_TAB_ERROR_PROPERTY, PurapKeyConstants.ERROR_ITEM_ACCOUNTING_TOTAL_AMOUNT, item.getItemIdentifierString(), desiredAmount.toString());
              valid = false;
          }
  
          return valid;
      }
  }