/**
    * 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.notification.dao;
  
  import java.util.Date;
  import java.util.List;
  
  import javax.persistence.EntityManager;
  import javax.persistence.OptimisticLockException;
  import javax.persistence.PersistenceContext;
  import javax.persistence.Query;
  
  import org.kuali.mobility.notification.entity.Notification;
  import org.kuali.mobility.notification.entity.UserNotification;
  import org.springframework.stereotype.Repository;
  
  @Repository
  public class NotificationDaoImpl implements NotificationDao {
  
      @PersistenceContext
      private EntityManager entityManager;
  
  	@Override
  	public Notification findNotificationById(Long id) {
  		Query query = entityManager.createQuery("select n from Notification n where n.notificationId = :id");
          query.setParameter("id", id);
          try {
          	return (Notification) query.getSingleResult();
          } catch (Exception e) {
          	return null;
          }
      }
  
  	@SuppressWarnings("unchecked")
  	@Override
  	public List<Notification> findAllNotifications() {
          Query query = entityManager.createQuery("select n from Notification n");
          try { 
          	return (List<Notification>) query.getResultList();
          } catch (Exception e) {        	
          	return null;
          }
  	}
  	
  	@SuppressWarnings("unchecked")
  	@Override
  	public List<Notification> findAllValidNotifications(Date date) {
          Query query = entityManager.createQuery("select n from Notification n where (n.startDate is null and n.endDate is null) or (n.startDate is null and :date < n.endDate) or (:date > n.startDate and n.endDate is null) or (:date between n.startDate and n.endDate)");
          query.setParameter("date", date);
          try { 
          	return (List<Notification>) query.getResultList();
          } catch (Exception e) {        	
          	return null;
          }
  	}
  	
  	@Override
  	public Long saveNotification(Notification notification) {
          if (notification == null) {
              return null;
          }
          try {
  	        if (notification.getNotificationId() == null) {
  	            entityManager.persist(notification);
  	        } else {
  	            entityManager.merge(notification);
  	        }
          } catch (OptimisticLockException oe) {
              return null;
          }
          return notification.getNotificationId();
      }
  
  	@Override
  	public void deleteNotificationById(Long id) {
          Query query = entityManager.createQuery("delete from Notification n where n.notificationId = :id");
          query.setParameter("id", id);
          query.executeUpdate();
  	}
  
  	@Override
  	public UserNotification findUserNotificationById(Long id) {
  		Query query = entityManager.createQuery("select un from UserNotification un where un.userNotificationId = :id");
          query.setParameter("id", id);
          try {
          	return (UserNotification) query.getSingleResult();
         } catch (Exception e) {
         	return null;
         }
 	}
 	
 	@Override
 	public UserNotification findUserNotificationByNotificationId(Long id) {
 		Query query = entityManager.createQuery("select un from UserNotification un where un.notificationId = :id");
         query.setParameter("id", id);
         try {
         	return (UserNotification) query.getSingleResult();
         } catch (Exception e) {
         	return null;
         }
 	}
 
 
 	@Override
 	public Long saveUserNotification(UserNotification userNotification) {
         if (userNotification == null) {
             return null; 
         }
         try {
 	        if (userNotification.getUserNotificationId() == null) {
 	            entityManager.persist(userNotification);
 	        } else {
 	            entityManager.merge(userNotification);
 	        }
         } catch (OptimisticLockException oe) {
             return null;
         }
         return userNotification.getUserNotificationId();
     }
 
 	@Override
 	public void deleteUserNotificationById(Long id) {
         Query query = entityManager.createQuery("delete from UserNotification un where un.userNotificationId = :id");
         query.setParameter("id", id);
         query.executeUpdate();
     }
 
 	@SuppressWarnings("unchecked")
 	@Override
 	public List<UserNotification> findAllUserNotificationsByDeviceId(String id) {
         Query query = entityManager.createQuery("select un from UserNotification un where deviceId = :id");
         query.setParameter("id", id);
         try { 
         	return (List<UserNotification>) query.getResultList();
         } catch (Exception e) {        	
         	return null;
         }
 	}
 
 	@SuppressWarnings("unchecked")
 	@Override
 	public List<UserNotification> findAllUserNotificationsByPersonId(Long id) {
         Query query = entityManager.createQuery("select un from UserNotification un where personId = :id");
         query.setParameter("id", id);
         try { 
         	return (List<UserNotification>) query.getResultList();
         } catch (Exception e) {        	
         	return null;
         }
 	}
 
 }