/**

  * 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.class1.lrr.termresolver;

 import org.kuali.rice.krms.api.engine.TermResolutionException;

 import org.kuali.rice.krms.api.engine.TermResolver;

 import org.kuali.student.common.util.krms.RulesExecutionConstants;

 import org.kuali.student.enrollment.lpr.dto.LprInfo;

 import org.kuali.student.enrollment.lpr.service.LprService;

 import org.kuali.student.enrollment.lrr.dto.LearningResultRecordInfo;

 import org.kuali.student.enrollment.lrr.infc.LearningResultRecord;

 import org.kuali.student.enrollment.lrr.service.LearningResultRecordService;

 import org.kuali.student.enrollment.lui.dto.LuiInfo;

 import org.kuali.student.enrollment.lui.service.LuiService;

 import org.kuali.student.r2.common.dto.ContextInfo;

 import org.kuali.student.r2.common.exceptions.DisabledIdentifierException;

 import org.kuali.student.r2.common.exceptions.DoesNotExistException;

 import org.kuali.student.r2.common.exceptions.InvalidParameterException;

 import org.kuali.student.r2.common.exceptions.MissingParameterException;

 import org.kuali.student.r2.common.exceptions.OperationFailedException;

 import org.kuali.student.r2.common.exceptions.PermissionDeniedException;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 /**

  * Term resolver class to find all completed courses for a student

  *

  * @author alubbers

  */

 public class CompletedCoursesResolver implements TermResolver<Collection<String>> {

     private LearningResultRecordService lrrService;

     private LprService lprService;

     private LuiService luiService;

     private final static Set<String> prerequisites = new HashSet<String>(2);

     static {

         prerequisites.add(RulesExecutionConstants.STUDENT_ID_TERM_NAME);

         prerequisites.add(RulesExecutionConstants.CONTEXT_INFO_TERM_NAME);

     }

     public void setLrrService(LearningResultRecordService lrrService) {

         this.lrrService = lrrService; 

     }

     public void setLprService(LprService lprService) {

         this.lprService = lprService;

     }

     public void setLuiService(LuiService luiService) {

         this.luiService = luiService;

     }

     @Override

     public Set<String> getPrerequisites() {

         return prerequisites;

     }

     @Override

     public String getOutput() {

         return RulesExecutionConstants.STUDENT_COMPLETED_COURSE_IDS_TERM_NAME;

     }

     @Override

     public Set<String> getParameterNames() {

         return Collections.emptySet();

     }

     @Override

     public int getCost() {

         // TODO analyze actual cost

         return 0;

     }

     @Override

     public Collection<String> resolve(Map<String, Object> resolvedPrereqs, Map<String, String> parameters) throws TermResolutionException {

         String studentId = resolvedPrereqs.get(RulesExecutionConstants.STUDENT_ID_TERM_NAME).toString();

         ContextInfo context = (ContextInfo) resolvedPrereqs.get(RulesExecutionConstants.CONTEXT_INFO_TERM_NAME);

         Collection<String> results = null;

         try {

             List<LprInfo> lprs = lprService.getLprsByPerson(studentId, context);

             Map<String, String> lprIdToCluId = new HashMap<String, String>();

             List<String> lprIds = new ArrayList<String>(lprs.size());

             for(LprInfo lpr : lprs) {

                 String luiId = lpr.getLuiId();

                 LuiInfo lui = luiService.getLui(luiId, context);

                 lprIdToCluId.put(lpr.getId(), lui.getCluId());

                 lprIds.add(lpr.getId());

             }

             List<LearningResultRecordInfo> lrrs = lrrService.getLearningResultRecordsForLprIds(lprIds, context);

             results = new ArrayList<String>();

             for(LearningResultRecord lrr : lrrs) {

                 results.add(lprIdToCluId.get(lrr.getLprId()));

             }

         } catch (DoesNotExistException e) {

             throw new TermResolutionException(e.getMessage(), this, parameters, e);

         }catch (InvalidParameterException e) {

             throw new TermResolutionException(e.getMessage(), this, parameters, e);

         } catch (MissingParameterException e) {

             throw new TermResolutionException(e.getMessage(), this, parameters, e);

         } catch (OperationFailedException e) {

             throw new TermResolutionException(e.getMessage(), this, parameters, e);

         } catch (PermissionDeniedException e) {

             throw new TermResolutionException(e.getMessage(), this, parameters, e);

         }

         return results;

     }

 }