/**
    * 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.mobility.emergencyinfo.dao;
  
  import java.util.List;
  
  import javax.persistence.EntityManager;
  import javax.persistence.NoResultException;
  import javax.persistence.OptimisticLockException;
  import javax.persistence.PersistenceContext;
  import javax.persistence.Query;
  
  import org.kuali.mobility.emergencyinfo.entity.EmergencyInfo;
  import org.springframework.stereotype.Repository;
  
  @Repository
  public class EmergencyInfoDaoImpl implements EmergencyInfoDao {
  
      @PersistenceContext
      private EntityManager entityManager;
      
      @SuppressWarnings("unchecked")
      public List<EmergencyInfo> findAllEmergencyInfo() {
          Query query = entityManager.createQuery("select ei from EmergencyInfo ei order by ei.order");
          try {
              return query.getResultList();
          } catch (NoResultException e) {
              return null;
          }
      }
  
      public EmergencyInfo findEmergencyInfoById(Long id) {
          Query query = entityManager.createQuery("select ei from EmergencyInfo ei where ei.emergencyInfoId = :id");
          query.setParameter("id", id);
          try {
              return (EmergencyInfo) query.getSingleResult();
          } catch (NoResultException e) {
              return null;
          }
      }
  
      @SuppressWarnings("unchecked")
      public List<EmergencyInfo> findAllEmergencyInfoByCampus(String campus) {
          try {
              Query query = entityManager.createQuery("select ei from EmergencyInfo ei where ei.campus like :campus order by ei.order");
              query.setParameter("campus", campus);
              return query.getResultList();
          } catch (NoResultException e) {
              return null;
          }
      }
      
      public Long saveEmergencyInfo(EmergencyInfo emergencyInfo) {
          if (emergencyInfo == null) {
              return null;
          }
          try {
              if (emergencyInfo.getEmergencyInfoId() == null) {
                  entityManager.persist(emergencyInfo);
              } else {
                  entityManager.merge(emergencyInfo);
              }
          } catch (OptimisticLockException oe) {
              return null;
          }
          return emergencyInfo.getEmergencyInfoId();
      }
  
      public void deleteEmergencyInfoById(Long id) {
          Query query = entityManager.createQuery("delete from EmergencyInfo ei where ei.emergencyInfoId = :id");
          query.setParameter("id", id);
          query.executeUpdate();
      }
  
      public void reorder(Long id, boolean up) {
          List<EmergencyInfo> list = findAllEmergencyInfo();
          EmergencyInfo last = null;
          boolean flag = false;
          int index = -1;
          int count = list.get(0).getOrder();
          for (EmergencyInfo emergencyInfo : list) {
              index++;
              if (emergencyInfo.getEmergencyInfoId().equals(id)) {            
                  if (up && last != null) {
                      swap(last, emergencyInfo);
                      count = last.getOrder() + 1;
                     continue;
                 } else if (!up) {
                     EmergencyInfo next = list.get(index + 1);
                     swap(emergencyInfo, next);
                     count = next.getOrder() + 1;
                     continue;                    
                 }
                 flag = true;
             }
             if (flag) {
                 emergencyInfo.setOrder(count);  
                 entityManager.merge(emergencyInfo);
             }
             count++;
             last = emergencyInfo;
         }
     }
 
     private void swap(EmergencyInfo one, EmergencyInfo two) {
         int temp = one.getOrder();
         one.setOrder(two.getOrder());
         two.setOrder(temp);
         entityManager.merge(one);
         entityManager.merge(two);
     }
     
     public EntityManager getEntityManager() {
         return entityManager;
     }
 
     public void setEntityManager(EntityManager entityManager) {
         this.entityManager = entityManager;
     }
 
 }