/*
    * 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.tem.document.web.struts;
  
  import java.util.List;
  import java.util.Observable;
  import java.util.Observer;
  
  import org.apache.log4j.Logger;
  import org.kuali.kfs.module.tem.businessobject.ImportedExpense;
  import org.kuali.kfs.module.tem.document.TravelDocument;
  import org.kuali.kfs.module.tem.document.service.TravelDocumentService;
  import org.kuali.kfs.module.tem.document.web.bean.TravelMvcWrapperBean;
  import org.kuali.kfs.module.tem.service.AccountingDistributionService;
  import org.kuali.kfs.module.tem.util.ExpenseUtils;
  import org.kuali.kfs.sys.context.SpringContext;
  import org.kuali.rice.krad.service.KualiRuleService;
  import org.kuali.rice.krad.util.ObjectUtils;
  
  public class RemoveImportedExpenseEvent implements Observer {
  
      public static Logger LOG = Logger.getLogger(RemoveImportedExpenseEvent.class);
  
      private static final int WRAPPER_ARG_IDX       = 0;
      private static final int SELECTED_LINE_ARG_IDX = 1;
  
      @Override
      public void update(Observable arg0, Object arg1) {
          if (!(arg1 instanceof Object[])) {
              return;
          }
          final Object[] args = (Object[]) arg1;
          LOG.debug(args[WRAPPER_ARG_IDX]);
          if (!(args[WRAPPER_ARG_IDX] instanceof TravelMvcWrapperBean)) {
              return;
          }
          final TravelMvcWrapperBean wrapper = (TravelMvcWrapperBean) args[WRAPPER_ARG_IDX];
  
          final TravelDocument document = wrapper.getTravelDocument();
          final Integer deleteIndex = (Integer) args[SELECTED_LINE_ARG_IDX];
  
          ImportedExpense line = document.getImportedExpenses().get(deleteIndex);
          document.removeExpense(line, deleteIndex);
  
          //Unassign historical expense.
          ExpenseUtils.assignExpense(line.getHistoricalTravelExpenseId(), null,null,null, false);
          List<ImportedExpense> importedExpenses = wrapper.getNewImportedExpenseLines();
  
  
          if (wrapper.getNewImportedExpenseLines().size() > deleteIndex.intValue()){
              wrapper.getNewImportedExpenseLines().remove(deleteIndex.intValue());
          }
          wrapper.setDistribution(getAccountingDistributionService().buildDistributionFrom(document));
  
      }
  
      private int getNextDetailIndex(List<ImportedExpense> importedExpenses, Long id){
          int index = 0;
          for(ImportedExpense detailLine: importedExpenses){
              if(ObjectUtils.isNotNull(detailLine.getExpenseParentId()) && detailLine.getExpenseParentId().equals(id)){
                  return index;
              }
              index++;
          }
          return -1;
      }
  
      /**
       * Gets the travelReimbursementService attribute.
       *
       * @return Returns the travelReimbursementService.
       */
      protected TravelDocumentService getTravelDocumentService() {
          return SpringContext.getBean(TravelDocumentService.class);
      }
  
  
      /**
       * Gets the kualiRulesService attribute.
       *
       * @return Returns the kualiRuleseService.
       */
      protected KualiRuleService getRuleService() {
         return SpringContext.getBean(KualiRuleService.class);
     }
 
     protected AccountingDistributionService getAccountingDistributionService() {
         return SpringContext.getBean(AccountingDistributionService.class);
     }
 }