/*
 * Copyright 2006 the original author or authors.
 * 
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-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.wamblee.mythtv;

import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.Query;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.criterion.Expression;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.orm.jpa.JpaTemplate;
import org.springframework.orm.jpa.support.JpaDaoSupport;

/**
 * 
 */
public class RecordingDatabase extends JpaDaoSupport {
    
    private static final Log LOG = LogFactory.getLog(RecordingDatabase.class);

    public RecordingDatabase() { 
        // Empty
    }
    
    public void init() {  
        /* 
        for (Recording recording: (List<Recording>)getHibernateTemplate().loadAll(Recording.class) ) { 
            LOG.info("Found recording " + recording);
        }
        LOG.info("After listing recordings");
        */
    }
    
    public Recording findRecording(final String aName) {
        JpaTemplate jpaTemplate = getJpaTemplate();
        EntityManager entityManager = jpaTemplate.getEntityManager();
        Query query = entityManager.createQuery(
                "from org.wamblee.mythtv.Recording where basename = ?1");
        query.setParameter(1, aName);
        List<Recording> result = query.getResultList();
        if ( result.size() > 1 ) { 
            throw new RuntimeException("More than two recordings returned");
        }
        if ( result.size() == 0 ) { 
            return null; 
        }
        return result.get(0);
    }
    
    public void update(Recording aRecording) { 
        // Update is not required since the whole task of updating the 
        // directory structure occurs within a single transaction. 
        // Therefore, modifications to recordings are automatically persisted. 
    }
}