/*
    * 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.fp.document.validation.impl;
  
  import static org.kuali.ole.sys.OLEConstants.SOURCE_ACCOUNTING_LINE_ERRORS;
  import static org.kuali.ole.sys.OLEConstants.TARGET_ACCOUNTING_LINE_ERRORS;
  import static org.kuali.ole.sys.OLEKeyConstants.ERROR_DOCUMENT_ACCOUNTING_LINE_TOTAL_CHANGED;
  
  import org.kuali.ole.fp.document.BudgetAdjustmentDocument;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.ole.sys.document.validation.impl.AccountingLineGroupTotalsUnchangedValidation;
  import org.kuali.rice.core.api.util.type.KualiDecimal;
  import org.kuali.rice.core.api.util.type.KualiInteger;
  import org.kuali.rice.core.web.format.CurrencyFormatter;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  /**
   * The Budget Adjustment's variation on whether accounting lines have been unchanged or not
   */
  public class BudgetAdjustmentAccountingLineTotalsUnchangedValidation extends AccountingLineGroupTotalsUnchangedValidation {
  
      /**
       * Returns true if account line totals remains unchanged from what was entered and what was persisted before; takes into account all adjustment totals
       * @see org.kuali.ole.sys.document.validation.Validation#validate(org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent)
       */
      public boolean validate(AttributedDocumentEvent event) {
          boolean isUnchanged = true;
  
          BudgetAdjustmentDocument persistedDocument = (BudgetAdjustmentDocument) retrievePersistedDocument(getAccountingDocumentForValidation());
          BudgetAdjustmentDocument currentDocument = (BudgetAdjustmentDocument)getAccountingDocumentForValidation();
  
          if (persistedDocument == null) {
              handleNonExistentDocumentWhenApproving(getAccountingDocumentForValidation());
          }
          else {
              // retrieve the persisted totals
              KualiDecimal persistedSourceCurrentBudgetTotal = persistedDocument.getSourceCurrentBudgetTotal();
              KualiDecimal persistedSourceBaseBudgetTotal = persistedDocument.getSourceBaseBudgetTotal();
              KualiDecimal persistedTargetCurrentBudgetTotal = persistedDocument.getTargetCurrentBudgetTotal();
              KualiDecimal persistedTargetBaseBudgetTotal = persistedDocument.getTargetBaseBudgetTotal();
  
              // retrieve the updated totals
              KualiDecimal currentSourceCurrentBudgetTotal = currentDocument.getSourceCurrentBudgetTotal();
              KualiDecimal currentSourceBaseBudgetTotal = currentDocument.getSourceBaseBudgetTotal();
              KualiDecimal currentTargetCurrentBudgetTotal = currentDocument.getTargetCurrentBudgetTotal();
              KualiDecimal currentTargetBaseBudgetTotal = currentDocument.getTargetBaseBudgetTotal();
  
              // make sure that totals have remained unchanged, if not, recognize that, and
              // generate appropriate error messages
              if (persistedSourceCurrentBudgetTotal.compareTo(currentSourceCurrentBudgetTotal) != 0) {
                  isUnchanged = false;
                  buildTotalChangeErrorMessage(SOURCE_ACCOUNTING_LINE_ERRORS, "source current budget", persistedSourceCurrentBudgetTotal, currentSourceCurrentBudgetTotal);
              }
              if (persistedSourceBaseBudgetTotal.compareTo(currentSourceBaseBudgetTotal) != 0) {
                  isUnchanged = false;
                  buildTotalChangeErrorMessage(SOURCE_ACCOUNTING_LINE_ERRORS, "source base budget", persistedSourceBaseBudgetTotal, currentSourceBaseBudgetTotal);
              }
              if (persistedTargetCurrentBudgetTotal.compareTo(currentTargetCurrentBudgetTotal) != 0) {
                  isUnchanged = false;
                  buildTotalChangeErrorMessage(TARGET_ACCOUNTING_LINE_ERRORS, "target current budget", persistedTargetCurrentBudgetTotal, currentTargetCurrentBudgetTotal);
              }
              if (persistedTargetBaseBudgetTotal.compareTo(currentTargetBaseBudgetTotal) != 0) {
                  isUnchanged = false;
                  buildTotalChangeErrorMessage(TARGET_ACCOUNTING_LINE_ERRORS, "target base budget", persistedTargetBaseBudgetTotal, currentTargetBaseBudgetTotal);
              }
          }
  
          return isUnchanged;
      }
      
      /**
       * Builds the error message for when totals have changed.
       * 
       * @param propertyName name of property
       * @param sectionTitle title of section
       * @param persistedSourceLineTotal previously persisted source line total
       * @param currentSourceLineTotal current entered source line total
       */
      protected void buildTotalChangeErrorMessage(String propertyName, String sectionTitle, KualiDecimal persistedSourceLineTotal, KualiDecimal currentSourceLineTotal) {
          String persistedTotal = (String) new CurrencyFormatter().format(persistedSourceLineTotal);
          String currentTotal = (String) new CurrencyFormatter().format(currentSourceLineTotal);
  
          GlobalVariables.getMessageMap().putError(propertyName, ERROR_DOCUMENT_ACCOUNTING_LINE_TOTAL_CHANGED, new String[] { sectionTitle, persistedTotal, currentTotal });
      }
  }