/*
    * The Kuali Financial System, a comprehensive financial management system for higher education.
    * 
    * Copyright 2005-2014 The Kuali Foundation
    * 
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as
    * published by the Free Software Foundation, either version 3 of the
    * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package org.kuali.kfs.module.ld.document.validation.impl;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import org.kuali.kfs.module.ld.LaborKeyConstants;
  import org.kuali.kfs.module.ld.document.LaborExpenseTransferDocumentBase;
  import org.kuali.kfs.sys.KFSPropertyConstants;
  import org.kuali.kfs.sys.businessobject.AccountingLine;
  import org.kuali.kfs.sys.document.AccountingDocument;
  import org.kuali.kfs.sys.document.validation.GenericValidation;
  import org.kuali.kfs.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.krad.document.Document;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  /**
   * benefit transfers cannot be made between two different fringe benefit labor object codes 
   */
  public class BenefitExpenseTransferSameFringeBenefitObjectCodeValidation extends GenericValidation {
      private Document documentForValidation;
      
      /**
       * Validates that the accounting lines in the accounting document have the same employee id 
       * <strong>Expects an accounting document as the first a parameter</strong>
       * @see org.kuali.kfs.validation.Validation#validate(java.lang.Object[])
       */
      public boolean validate(AttributedDocumentEvent event) {
          boolean result = true;
          
          Document documentForValidation = getDocumentForValidation();
          
          AccountingDocument accountingDocument = (AccountingDocument) documentForValidation;
          
          // benefit transfers cannot be made between two different fringe benefit labor object codes.
          boolean sameFringeBenefitObjectCodes = hasSameFringeBenefitObjectCodes(accountingDocument);
          if (!sameFringeBenefitObjectCodes) {
              GlobalVariables.getMessageMap().putError(KFSPropertyConstants.TARGET_ACCOUNTING_LINES, LaborKeyConstants.DISTINCT_OBJECT_CODE_ERROR);
              result = false;
          }
  
          return result;
      }
  
      /**
       * Determines whether target accounting lines have the same fringe benefit object codes as source accounting lines
       * 
       * @param accountingDocument the given accounting document
       * @return true if target accounting lines have the same fringe benefit object codes as source accounting lines; otherwise, false
       */
      protected boolean hasSameFringeBenefitObjectCodes(AccountingDocument accountingDocument) {
          LaborExpenseTransferDocumentBase expenseTransferDocument = (LaborExpenseTransferDocumentBase) accountingDocument;
  
          Set<String> objectCodesFromSourceLine = new HashSet<String>();
          for (Object sourceAccountingLine : expenseTransferDocument.getSourceAccountingLines()) {
              AccountingLine line = (AccountingLine) sourceAccountingLine;
              objectCodesFromSourceLine.add(line.getFinancialObjectCode());
          }
  
          Set<String> objectCodesFromTargetLine = new HashSet<String>();
          for (Object targetAccountingLine : expenseTransferDocument.getTargetAccountingLines()) {
              AccountingLine line = (AccountingLine) targetAccountingLine;
              objectCodesFromTargetLine.add(line.getFinancialObjectCode());
          }
  
          if (objectCodesFromSourceLine.size() != objectCodesFromTargetLine.size()) {
              return false;
          }
  
          return objectCodesFromSourceLine.containsAll(objectCodesFromTargetLine);
      }
  
      /**
       * Gets the accountingDocumentForValidation attribute. 
       * @return Returns the accountingDocumentForValidation.
       */
      public Document getDocumentForValidation() {
          return documentForValidation;
      }
  
      /**
       * Sets the accountingDocumentForValidation attribute value.
      * @param accountingDocumentForValidation The accountingDocumentForValidation to set.
      */
     public void setDocumentForValidation(Document documentForValidation) {
         this.documentForValidation = documentForValidation;
     } 
 }