/**
 * Abiquo community edition
 * cloud management application for hybrid clouds
 * Copyright (C) 2008-2010 - Abiquo Holdings S.L.
 *
 * This application is free software; you can redistribute it and/or
 * modify it under the terms of the GNU LESSER GENERAL PUBLIC
 * LICENSE as published by the Free Software Foundation under
 * version 3 of the License
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * LESSER GENERAL PUBLIC LICENSE v.3 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

package com.abiquo.server.core.statistics;

import javax.persistence.EntityManager;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.ProjectionList;
import org.hibernate.criterion.Projections;
import org.springframework.stereotype.Repository;

import com.abiquo.server.core.common.persistence.DefaultDAOBase;
import com.softwarementors.bzngine.engines.hibernate.HibernateEntityManagerHelper;

@Repository("jpaCloudUsageDAO")
public class CloudUsageDAO extends DefaultDAOBase<Integer, CloudUsage>
{
    public CloudUsageDAO()
    {
        super(CloudUsage.class);
    }

    public CloudUsageDAO(EntityManager entityManager)
    {
        super(CloudUsage.class, entityManager);
    }

    public CloudUsage sumTotalCloudUsage()
    {
        // TODO: Include aggregators functionality in bzengine?
        Session ses = HibernateEntityManagerHelper.getSession(getEntityManager());

        Criteria crit = ses.createCriteria(CloudUsage.class);
        ProjectionList proList = Projections.projectionList();
        proList.add(Projections.sum(CloudUsage.SERVERS_TOTAL_PROPERTY));
        proList.add(Projections.sum(CloudUsage.SERVERS_RUNNING_PROPERTY));
        proList.add(Projections.sum(CloudUsage.STORAGE_TOTAL_PROPERTY));
        // proList.add(Projections.sum(CloudUsage.STORAGE_RESERVED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.STORAGE_USED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.PUBLIC_I_PS_TOTAL_PROPERTY));
        // proList.add(Projections.sum(CloudUsage.PUBLIC_I_PS_RESERVED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.PUBLIC_I_PS_USED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_MACHINES_TOTAL_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_MACHINES_RUNNING_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_CPU_TOTAL_PROPERTY));
        // proList.add(Projections.sum(CloudUsage.V_CPU_RESERVED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_CPU_USED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_MEMORY_TOTAL_PROPERTY));
        // proList.add(Projections.sum(CloudUsage.V_MEMORY_RESERVED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_MEMORY_USED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_STORAGE_TOTAL_PROPERTY));
        // proList.add(Projections.sum(CloudUsage.V_STORAGE_RESERVED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.V_STORAGE_USED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.NUM_USERS_CREATED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.NUM_VDC_CREATED_PROPERTY));
        proList.add(Projections.sum(CloudUsage.NUM_ENTERPRISES_CREATED_PROPERTY));

        crit.setProjection(proList);
        Object[] obj = (Object[]) crit.uniqueResult(); // Returns Object[] ->
        CloudUsage result = new CloudUsage();

        int cont = 0;
        result.setServersTotal((Long) obj[cont++]);
        result.setServersRunning((Long) obj[cont++]);
        result.setStorageTotal((Long) obj[cont++]);
        // result.setStorageReserved((Long) obj[cont++]);
        result.setStorageUsed((Long) obj[cont++]);
        result.setPublicIPsTotal((Long) obj[cont++]);
        // result.setPublicIPsReserved((Long) obj[cont++]);
        result.setPublicIPsUsed((Long) obj[cont++]);
        result.setVirtualMachinesTotal((Long) obj[cont++]);
        result.setVirtualMachinesRunning((Long) obj[cont++]);
        result.setVirtualCpuTotal((Long) obj[cont++]);
        // result.setVirtualCpuReserved((Long) obj[cont++]);
        result.setVirtualCpuUsed((Long) obj[cont++]);
        result.setVirtualMemoryTotal((Long) obj[cont++]);
        // result.setVirtualMemoryReserved((Long) obj[cont++]);
        result.setVirtualMemoryUsed((Long) obj[cont++]);
        result.setVirtualStorageTotal((Long) obj[cont++]);
        // result.setVirtualStorageReserved((Long) obj[cont++]);
        result.setVirtualStorageUsed((Long) obj[cont++]);
        result.setNumUsersCreated((Long) obj[cont++]);
        result.setNumVdcCreated((Long) obj[cont++]);
        result.setNumEnterprisesCreated((Long) obj[cont++]);

        return result;
    }

}