/**
    * Copyright 2005-2015 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.rice.kim.impl.group;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.criteria.Predicate;
  import org.kuali.rice.core.api.criteria.PredicateUtils;
  import org.kuali.rice.core.api.criteria.QueryByCriteria;
  import org.kuali.rice.kim.api.KimConstants;
  import org.kuali.rice.kim.api.group.Group;
  import org.kuali.rice.kim.api.group.GroupQueryResults;
  import org.kuali.rice.kim.api.group.GroupService;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  import org.kuali.rice.krad.lookup.LookupableImpl;
  import org.kuali.rice.krad.lookup.LookupForm;
  
  import java.sql.Timestamp;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import static org.kuali.rice.core.api.criteria.PredicateFactory.*;
  import static org.kuali.rice.core.api.criteria.PredicateFactory.and;
  import static org.kuali.rice.core.api.criteria.PredicateFactory.lessThan;
  
  /**
   * Custom lookupable for the {@link GroupBo} lookup to call the group service for searching
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class GroupLookupableImpl extends LookupableImpl {
      private static final long serialVersionUID = -3149952849854425077L;
  
      /**
       * Translates any search criteria on principal name to member id and active data, then calls group service to
       * retrieve matching groups
       *
       * @return List<GroupBo>
       */
      @Override
      protected Collection<?> executeSearch(Map<String, String> adjustedSearchCriteria,
                  List<String> wildcardAsLiteralSearchCriteria, boolean bounded, Integer searchResultsLimit) {
          Map<String, String> criteriaMap = new HashMap<String, String>(adjustedSearchCriteria);
          QueryByCriteria.Builder criteria = QueryByCriteria.Builder.create();
  
          if (!criteriaMap.isEmpty()) {
              List<Predicate> predicates = new ArrayList<Predicate>();
              //principalId doesn't exist on 'Group'.  Lets do this predicate conversion separately
              if (StringUtils.isNotBlank(criteriaMap.get(KimConstants.UniqueKeyConstants.PRINCIPAL_NAME))) {
                  String principalId = KimApiServiceLocator.getIdentityService().getPrincipalByPrincipalName(
                          criteriaMap.get(KimConstants.UniqueKeyConstants.PRINCIPAL_NAME)).getPrincipalId();
                  Timestamp currentTime = new Timestamp(Calendar.getInstance().getTimeInMillis());
                  predicates.add(and(equal("members.memberId", principalId), equal("members.typeCode",
                          KimConstants.KimGroupMemberTypes.PRINCIPAL_MEMBER_TYPE.getCode()), and(or(isNull(
                          "members.activeFromDateValue"), greaterThanOrEqual("members.activeFromDateValue", currentTime)),
                          or(isNull("members.activeToDateValue"), lessThan("members.activeToDateValue", currentTime)))));
  
              }
              criteriaMap.remove(KimConstants.UniqueKeyConstants.PRINCIPAL_NAME);
  
              predicates.add(PredicateUtils.convertMapToPredicate(criteriaMap));
              criteria.setPredicates(and(predicates.toArray(new Predicate[predicates.size()])));
          }
  
          GroupQueryResults groupResults = getGroupService().findGroups(criteria.build());
          List<Group> groups = groupResults.getResults();
  
          //have to convert back to Bos :(
          List<GroupBo> groupBos = new ArrayList<GroupBo>(groups.size());
          for (Group group : groups) {
              groupBos.add(GroupBo.from(group));
          }
  
          return groupBos;
      }
  
      public GroupService getGroupService() {
          return KimApiServiceLocator.getGroupService();
      }
  }