/**
    * Copyright 2011 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.osedu.org/licenses/ECL-2.0
    *
    * 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.student.enrollment.class2.courseoffering.krms.termresolver;
  
  import org.kuali.rice.krms.api.engine.TermResolutionException;
  import org.kuali.rice.krms.api.engine.TermResolver;
  import org.kuali.student.enrollment.academicrecord.dto.StudentCourseRecordInfo;
  import org.kuali.student.r2.common.dto.ContextInfo;
  import org.kuali.student.r2.common.krms.util.KSKRMSExecutionUtil;
  import org.kuali.student.r2.core.constants.KSKRMSServiceConstants;
  import org.kuali.student.r2.lum.lrc.dto.ResultValueInfo;
  import org.kuali.student.r2.lum.lrc.service.LRCService;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * Returns true if the student has completed all the courses in the courseset with
   * a equal or higher grade than the given grade.
   * <p/>
   * Rule Statement examples:
   * 1) Must not have earned a grade of <gradeType> <grade> or higher in <course>
   * 2) Must have earned a minimum grade of <gradeType> <grade> in <course>
   *
   * @author Kuali Student Team
   */
  public class CourseWithGradeTermResolver implements TermResolver<Boolean> {
  
      private LRCService lrcService;
  
      private TermResolver<List<StudentCourseRecordInfo>> courseRecordsForCourseIdTermResolver;
  
      @Override
      public Set<String> getPrerequisites() {
          Set<String> prereqs = new HashSet<String>(2);
          prereqs.add(KSKRMSServiceConstants.TERM_PREREQUISITE_PERSON_ID);
          prereqs.add(KSKRMSServiceConstants.TERM_PREREQUISITE_CONTEXTINFO);
          return Collections.unmodifiableSet(prereqs);
      }
  
      @Override
      public String getOutput() {
          return KSKRMSServiceConstants.TERM_RESOLVER_COURSEWITHGRADE;
      }
  
      @Override
      public Set<String> getParameterNames() {
          Set<String> temp = new HashSet<String>(3);
          temp.add(KSKRMSServiceConstants.TERM_PARAMETER_TYPE_CLU_KEY);
          temp.add(KSKRMSServiceConstants.TERM_PARAMETER_TYPE_GRADE_KEY);
          temp.add(KSKRMSServiceConstants.TERM_PARAMETER_TYPE_GRADE_TYPE_KEY);
          return Collections.unmodifiableSet(temp);
      }
  
      @Override
      public int getCost() {
          return 5;
      }
  
      @Override
      public Boolean resolve(Map<String, Object> resolvedPrereqs, Map<String, String> parameters) throws TermResolutionException {
          ContextInfo context = (ContextInfo) resolvedPrereqs.get(KSKRMSServiceConstants.TERM_PREREQUISITE_CONTEXTINFO);
          String gradeType = parameters.get(KSKRMSServiceConstants.TERM_PARAMETER_TYPE_GRADE_TYPE_KEY);
          String grade = parameters.get(KSKRMSServiceConstants.TERM_PARAMETER_TYPE_GRADE_KEY);
  
          try {
  
              ResultValueInfo gradeValue = this.getLrcService().getResultValue(grade, context);
              Integer gradeNumericValue = Integer.valueOf(gradeValue.getNumericValue());
  
              //Retrieve the list of cluIds from the cluset.
              List<StudentCourseRecordInfo> courseRecords = this.getCourseRecordsForCourseIdTermResolver().resolve(resolvedPrereqs, parameters);
              for (StudentCourseRecordInfo courseRecord : courseRecords) {
                  if (gradeType.equals(courseRecord.getAssignedGradeScaleKey())) {
                      ResultValueInfo resultValue = this.getLrcService().getResultValue(courseRecord.getAssignedGradeValue(), context);
                      Integer resultNumericValue = Integer.valueOf(resultValue.getNumericValue());
                      if(resultNumericValue>=gradeNumericValue){
                          return true;
                      }
                  }
              }
  
          } catch (Exception e) {
             KSKRMSExecutionUtil.convertExceptionsToTermResolutionException(parameters, e, this);
         }
 
         return false;
     }
 
     public LRCService getLrcService() {
         return lrcService;
     }
 
     public void setLrcService(LRCService lrcService) {
         this.lrcService = lrcService;
     }
 
     public TermResolver<List<StudentCourseRecordInfo>> getCourseRecordsForCourseIdTermResolver() {
         return courseRecordsForCourseIdTermResolver;
     }
 
     public void setCourseRecordsForCourseIdTermResolver(TermResolver<List<StudentCourseRecordInfo>> courseRecordsForCourseIdTermResolver) {
         this.courseRecordsForCourseIdTermResolver = courseRecordsForCourseIdTermResolver;
     }
 
 }