package org.kuali.student.lum.course.service.utils;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Stack;

 import org.kuali.student.common.util.MessageUtils;

 import org.kuali.student.common.validator.BeanConstraintDataProvider;

 import org.kuali.student.common.validator.ConstraintDataProvider;

 import org.kuali.student.common.validator.DefaultValidatorImpl;

 import org.kuali.student.core.dictionary.dto.FieldDefinition;

 import org.kuali.student.core.dictionary.dto.ObjectStructureDefinition;

 import org.kuali.student.core.validation.dto.ValidationResultInfo;

 import org.kuali.student.lum.course.dto.CourseExpenditureInfo;

 import org.kuali.student.lum.lu.dto.AffiliatedOrgInfo;

 public class ExpenditurePercentValidator extends DefaultValidatorImpl {

     private static final String COURSE_EXPENDITURE_FIELD = "expenditure";

     @Override

     public List<ValidationResultInfo> validateObject(Object data, ObjectStructureDefinition objStructure) {

         // Custom validators are required to only override the other validateObject method

         return null;

     }

     /***

      * @see org.kuali.student.common.validator.Validator#validateObject(org.kuali.student.core.dictionary.dto.FieldDefinition,

      *      java.lang.Object, org.kuali.student.core.dictionary.dto.ObjectStructureDefinition, java.util.Stack)

      */

     @Override

     public List<ValidationResultInfo> validateObject(FieldDefinition field, Object data, ObjectStructureDefinition objStructure, Stack<String> elementStack) {

         List<ValidationResultInfo> results = new ArrayList<ValidationResultInfo>();

         // Check to see if the validation is called on the right field

         if (!COURSE_EXPENDITURE_FIELD.equalsIgnoreCase(field.getName())) {

             throw new RuntimeException("Custom Validator " + this.getClass().getName() + " was not called on the right field: expenditure");

         }

         ConstraintDataProvider dataProvider = new BeanConstraintDataProvider();

         dataProvider.initialize(data);

         // Get revenues data

         Object expenditureObj = dataProvider.getValue(field.getName());

         // Return if no data to validate

         if(null == expenditureObj) {

             return results;

         }

         if (!(expenditureObj instanceof CourseExpenditureInfo)) {

             throw new RuntimeException("Custom Validator " + this.getClass().getName() + " was not called with right data: CourseExpenditureInfo");

         }

         CourseExpenditureInfo courseExpInfo = (CourseExpenditureInfo) expenditureObj;

         long totalOrgPercent = 0l;

         if (courseExpInfo.getAffiliatedOrgs().size() > 0) {

             for (AffiliatedOrgInfo org : courseExpInfo.getAffiliatedOrgs()) {

                 totalOrgPercent += org.getPercentage();

             }

         }

         if (courseExpInfo.getAffiliatedOrgs().size() > 0 && totalOrgPercent != 100l) {

             ValidationResultInfo valRes = new ValidationResultInfo(getElementXpath(elementStack));

             valRes.setElement("/expenditure/affiliatedOrgs");

             valRes.setError(MessageUtils.interpolate(getMessage("validation.expenditureTotal"), toMap(field)));

             results.add(valRes);

         }

         return results;

     }

 }