/*
    * 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.apache.commons.beanutils.PropertyUtils;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.ole.module.purap.PurapConstants.PaymentRequestStatuses;
  import org.kuali.ole.module.purap.businessobject.PurApAccountingLine;
  import org.kuali.ole.module.purap.businessobject.PurApItem;
  import org.kuali.ole.module.purap.document.PaymentRequestDocument;
  import org.kuali.ole.sys.businessobject.AccountingLine;
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.ole.sys.document.AccountingDocument;
  import org.kuali.ole.sys.document.validation.BranchingValidation;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.core.api.parameter.ParameterEvaluatorService;
  import org.kuali.rice.coreservice.framework.parameter.ParameterService;
  import org.kuali.rice.krad.bo.PersistableBusinessObject;
  import org.kuali.rice.krad.util.ObjectUtils;
  
  import java.lang.reflect.InvocationTargetException;
  import java.util.LinkedList;
  import java.util.Queue;
  
  /**
   * A validation which uses parameters to determine if a value on an accounting line is valid.
   */
  public class PurchasingAccountsPayableObjectCodeOverrideBranchingValidation extends BranchingValidation {
      protected String propertyPath;
      protected String parameterToCheckAgainst;
      protected ParameterService parameterService;
      protected String responsibleProperty;
      protected AccountingDocument accountingDocumentForValidation;
      protected AccountingLine accountingLineForValidation;
  
      protected final static String OBJECT_CODE_OVERRIDEN = "ObjectCodeOverriden";
      protected final static String OBJECT_CODE_NOT_OVERRIDEN = "ObjectCodeNotOverriden";
  
      @Override
      protected String determineBranch(AttributedDocumentEvent event) {
          if (!StringUtils.isBlank(propertyPath)) {
              refreshByPath(accountingLineForValidation);
          }
  
          boolean isTaxApproval = false;
          //if payment request, skip object code check when this is a tax approval, 
          // or if this accounting line is from a Tax Charge line.
          if (accountingDocumentForValidation instanceof PaymentRequestDocument) {
              PaymentRequestDocument preq = (PaymentRequestDocument) accountingDocumentForValidation;
              PurApAccountingLine purapAccountingLine = (PurApAccountingLine) accountingLineForValidation;
              PurApItem item = purapAccountingLine.getPurapItem();
  
              if (StringUtils.equals(PaymentRequestStatuses.APPDOC_AWAITING_TAX_REVIEW, preq.getApplicationDocumentStatus())) {
                  isTaxApproval = true;
              } else if (StringUtils.equals(PaymentRequestStatuses.APPDOC_DEPARTMENT_APPROVED, preq.getApplicationDocumentStatus()) &&
                      (ObjectUtils.isNotNull(item) && item.getItemType().getIsTaxCharge())) {
                  isTaxApproval = true;
              }
          }
  
          if (isTaxApproval) {
              return null;
          } else if (isAccountingLineValueAllowed(accountingDocumentForValidation.getClass(), accountingLineForValidation, parameterToCheckAgainst, propertyPath, (responsibleProperty != null ? responsibleProperty : propertyPath))) {
              return OBJECT_CODE_OVERRIDEN;
          } else {
              return OBJECT_CODE_NOT_OVERRIDEN;
          }
      }
  
      /**
       * Checks that a value on an accounting line is valid, based on parameters, for a document of the given class
       *
       * @param documentClass           the class of the document to check
       * @param accountingLine          the accounting line to check
       * @param parameterName           the name of the parameter to check
       * @param propertyName            the name of the property to check
       * @param userEnteredPropertyName the value the user entered on the line
       * @return true if this passes validation, false otherwise
       */
      protected boolean isAccountingLineValueAllowed(Class documentClass, AccountingLine accountingLine, String parameterName, String propertyName, String userEnteredPropertyName) {
          boolean isAllowed = false;
          String exceptionMessage = "Invalid property name provided to PurchasingAccountsPayableObjectCodeOverrideBranchingValidation isAccountingLineValueAllowed method: " + propertyName;
          try {
              String propertyValue = (String) PropertyUtils.getProperty(accountingLine, propertyName);
              if (getParameterService().parameterExists(documentClass, parameterName)) {
                  isAllowed = /*REFACTORME*/SpringContext.getBean(ParameterEvaluatorService.class).getParameterEvaluator(documentClass, parameterName, propertyValue).evaluationSucceeds();
             }
         } catch (IllegalAccessException e) {
             throw new RuntimeException(exceptionMessage, e);
         } catch (InvocationTargetException e) {
             throw new RuntimeException(exceptionMessage, e);
         } catch (NoSuchMethodException e) {
             throw new RuntimeException(exceptionMessage, e);
         }
         return isAllowed;
     }
 
     /**
      * Refreshes a value on the accounting line, using the propertyPath to decided what to refresh
      *
      * @param line the accounting line to refresh a property on
      */
     public void refreshByPath(AccountingLine line) {
         refreshByQueue(line, convertPathToQueue(propertyPath));
     }
 
     /**
      * Creates a Queue which represents a FIFO path of what properties to visit, based on the given property path
      *
      * @param path the path to convert to a Queue
      * @return a Queue representing the path
      */
     protected Queue<String> convertPathToQueue(String path) {
         Queue<String> pathQueue = new LinkedList<String>();
         for (String property : path.split("\\.")) {
             pathQueue.add(property);
         }
         return pathQueue;
     }
 
     /**
      * Recursively refreshes a property given by the queue path
      *
      * @param bo   the business object to refresh
      * @param path the path, in Queue form, of properties to refresh
      */
     protected void refreshByQueue(PersistableBusinessObject bo, Queue<String> path) {
         if (path.size() > 1) { // we know that the last thing on our list is a code. why refresh that?
             String currentProperty = path.remove();
             bo.refreshReferenceObject(currentProperty);
             PersistableBusinessObject childBO = (PersistableBusinessObject) ObjectUtils.getPropertyValue(bo, currentProperty);
             if (!ObjectUtils.isNull(childBO)) {
                 refreshByQueue(childBO, path);
             }
         }
     }
 
     /**
      * Gets the propertyPath attribute. This is the path to the value to check, e. g. "accountNumber.subFundGroup.fundGroupCode"
      *
      * @return Returns the propertyPath.
      */
     public String getPropertyPath() {
         return propertyPath;
     }
 
     /**
      * Sets the propertyPath attribute value. This is the path to the value to check, e. g. "accountNumber.subFundGroup.fundGroupCode"
      *
      * @param propertyPath The propertyPath to set.
      */
     public void setPropertyPath(String refreshPath) {
         this.propertyPath = refreshPath;
     }
 
     /**
      * Gets the parameterService attribute.
      *
      * @return Returns the parameterService.
      */
     public ParameterService getParameterService() {
         return parameterService;
     }
 
     /**
      * Sets the parameterService attribute value.
      *
      * @param parameterService The parameterService to set.
      */
     public void setParameterService(ParameterService parameterService) {
         this.parameterService = parameterService;
     }
 
     /**
      * Gets the parameterToCheckAgainst attribute. This is the name of the parameter which has the values to validate against.
      *
      * @return Returns the parameterToCheckAgainst.
      */
     public String getParameterToCheckAgainst() {
         return parameterToCheckAgainst;
     }
 
     /**
      * Sets the parameterToCheckAgainst attribute value.  This is the name of the parameter which has the values to validate against.
      *
      * @param parameterToCheckAgainst The parameterToCheckAgainst to set.
      */
     public void setParameterToCheckAgainst(String parameterToCheckAgainst) {
         this.parameterToCheckAgainst = parameterToCheckAgainst;
     }
 
     /**
      * Gets the responsibleProperty attribute. This is the property on the accounting line to show the error on.
      *
      * @return Returns the responsibleProperty.
      */
     public String getResponsibleProperty() {
         return responsibleProperty;
     }
 
     /**
      * Sets the responsibleProperty attribute value. This is the property on the accounting line to show the error on.
      *
      * @param responsibleProperty The responsibleProperty to set.
      */
     public void setResponsibleProperty(String responsibleProperty) {
         this.responsibleProperty = responsibleProperty;
     }
 
     /**
      * Gets the accountingDocumentForValidation attribute.
      *
      * @return Returns the accountingDocumentForValidation.
      */
     public AccountingDocument getAccountingDocumentForValidation() {
         return accountingDocumentForValidation;
     }
 
     /**
      * Sets the accountingDocumentForValidation attribute value.
      *
      * @param accountingDocumentForValidation
      *         The accountingDocumentForValidation to set.
      */
     public void setAccountingDocumentForValidation(AccountingDocument accountingDocumentForValidation) {
         this.accountingDocumentForValidation = accountingDocumentForValidation;
     }
 
     /**
      * Gets the accountingLineForValidation attribute.
      *
      * @return Returns the accountingLineForValidation.
      */
     public AccountingLine getAccountingLineForValidation() {
         return accountingLineForValidation;
     }
 
     /**
      * Sets the accountingLineForValidation attribute value.
      *
      * @param accountingLineForValidation The accountingLineForValidation to set.
      */
     public void setAccountingLineForValidation(AccountingLine accountingLineForValidation) {
         this.accountingLineForValidation = accountingLineForValidation;
     }
 
 }