/**
    * Copyright 2012 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.
   *
   * Created by Daniel on 3/30/12
   */
  package org.kuali.student.enrollment.class2.appointment.service.impl;
  
  import org.kuali.rice.core.api.criteria.Predicate;
  import org.kuali.rice.core.api.criteria.QueryByCriteria;
  import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;
  import org.kuali.rice.krad.lookup.LookupableImpl;
  import org.kuali.rice.krad.web.form.LookupForm;
  import org.kuali.student.enrollment.class2.appointment.dto.StudentGroupWrapper;
  import org.kuali.student.r2.common.constants.CommonServiceConstants;
  import org.kuali.student.r2.common.dto.ContextInfo;
  import org.kuali.student.r2.core.constants.PopulationServiceConstants;
  import org.kuali.student.r2.core.population.dto.PopulationInfo;
  import org.kuali.student.r2.core.population.service.PopulationService;
  
  import javax.xml.namespace.QName;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import static org.kuali.rice.core.api.criteria.PredicateFactory.and;
  import static org.kuali.rice.core.api.criteria.PredicateFactory.like;
  
  /**
   * This class //TODO ...
   *
   * @author Kuali Student Team
   */
  public class StudentGroupWrapperLookupableImpl extends LookupableImpl {
      private transient PopulationService populationService;
      private static final long serialVersionUID = 1L;
      @Override
      protected List<?> getSearchResults(LookupForm lookupForm, Map<String, String> fieldValues, boolean unbounded) {
          List<StudentGroupWrapper> results = new ArrayList<StudentGroupWrapper>();
          ContextInfo context = new ContextInfo();
  
          QueryByCriteria.Builder qBuilder = QueryByCriteria.Builder.create();
          List<Predicate> pList = new ArrayList<Predicate>();
          qBuilder.setPredicates();
          // create predicates for search parameters
          for(String key : fieldValues.keySet()){
              Predicate words = like(key,fieldValues.get(key));
              pList.add(words);
          }
          if (!pList.isEmpty()){
              Predicate[] preds = new Predicate[pList.size()];
              pList.toArray(preds);
              qBuilder.setPredicates(and(preds));
          }
  
          try {
              // method returns list of populationinfos.
              java.util.List<PopulationInfo> populationInfos = getPopulationService().searchForPopulations(qBuilder.build(), context);
              for(PopulationInfo populationInfo:populationInfos){
                  StudentGroupWrapper studentGroupWrapper = new StudentGroupWrapper();
                  studentGroupWrapper.setId(populationInfo.getId());
                  studentGroupWrapper.setName(populationInfo.getName());
                  studentGroupWrapper.setDescription(populationInfo.getDescr().getPlain());
                  results.add(studentGroupWrapper);
              }
          } catch (Exception e) {
              throw new RuntimeException("Error Performing Search", e); //To change body of catch statement use File | Settings | File Templates.
          }
          return results;
      }
  
      protected PopulationService getPopulationService() {
          // populationService is retrieved using global resource loader which is wired in ks-enroll-context.xml
          if (populationService == null) {
              // TODO: Fix with real service later on
              populationService = (PopulationService) GlobalResourceLoader.getService(new QName(PopulationServiceConstants.NAMESPACE, "PopulationMockService"));
  
          }
          return populationService;
      }
  
  }