/**
 * 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.vsm.redis.pubsub.notifier.impl;

import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.abiquo.commons.amqp.impl.vsm.domain.VirtualSystemEvent;
import com.abiquo.vsm.events.VMEventType;
import com.abiquo.vsm.model.PhysicalMachine;
import com.abiquo.vsm.model.VirtualMachine;
import com.abiquo.vsm.redis.pubsub.notifier.GenericNotifier;

/**
 * Concrete implementation of {@link GenericNotifier} for the ESXi hypervisor. When a VirtualMachine
 * is moved, using VCenter, between PhysicalMachines a CREATED (on destination PhysicalMachine) and
 * a DESTROYED (on origin PhysicalMachine) events are generated.
 * 
 * @author eruiz@abiquo.com
 */
public class ESXiNotifier extends GenericNotifier
{
    private final static Logger logger = LoggerFactory.getLogger(ESXiNotifier.class);

    @Override
    public List<VirtualSystemEvent> processEvent(final VirtualMachine virtualMachine,
        final PhysicalMachine machine, final VMEventType event)
    {
        logger.trace(String.format("Processing %s %s event from machine %s",
            virtualMachine.getName(), event.name(), machine.getAddress()));

        List<VirtualSystemEvent> notifications = new ArrayList<VirtualSystemEvent>();

        switch (event)
        {
            case CREATED:
                notifications.addAll(deduceMoveEvent(virtualMachine, machine, event));
                break;

            case POWER_ON:
            case POWER_OFF:
            case PAUSED:
            case RESUMED:
            case DESTROYED:

                if (samePhysicalMachineAddress(virtualMachine.getPhysicalMachine(), machine)
                    && !alreadyNotified(virtualMachine, event))
                {
                    notifications.add(buildVirtualSystemEvent(virtualMachine, event));
                }

                break;

            default:
                break;
        }

        return notifications;
    }
}