/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */

package org.opendaylight.controller.arphandler.internal;

import java.util.Dictionary;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Set;

import org.apache.felix.dm.Component;
import org.opendaylight.controller.clustering.services.ICacheUpdateAware;
import org.opendaylight.controller.clustering.services.IClusterContainerServices;
import org.opendaylight.controller.connectionmanager.IConnectionManager;
import org.opendaylight.controller.hosttracker.IfHostListener;
import org.opendaylight.controller.hosttracker.IfIptoHost;
import org.opendaylight.controller.hosttracker.hostAware.IHostFinder;
import org.opendaylight.controller.sal.core.ComponentActivatorAbstractBase;
import org.opendaylight.controller.sal.packet.IDataPacketService;
import org.opendaylight.controller.sal.packet.IListenDataPacket;
import org.opendaylight.controller.switchmanager.ISwitchManager;
import org.opendaylight.controller.topologymanager.ITopologyManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Activator extends ComponentActivatorAbstractBase {
    protected static final Logger logger = LoggerFactory
            .getLogger(Activator.class);


    /**
     * Function that is used to communicate to dependency manager the
     * list of known implementations for services inside a container
     *
     *
     * @return An array containing all the CLASS objects that will be
     * instantiated in order to get an fully working implementation
     * Object
     */
    @Override
    public Object[] getImplementations() {
        Object[] res = { ArpHandler.class };
        return res;
    }

    /**
     * Function that is called when configuration of the dependencies
     * is required.
     *
     * @param c dependency manager Component object, used for
     * configuring the dependencies exported and imported
     * @param imp Implementation class that is being configured,
     * needed as long as the same routine can configure multiple
     * implementations
     * @param containerName The containerName being configured, this allow
     * also optional per-container different behavior if needed, usually
     * should not be the case though.
     */
    @Override
    public void configureInstance(Component c, Object imp, String containerName) {
        if (imp.equals(ArpHandler.class)) {
            // export the service
            Dictionary<String, Object> props = new Hashtable<String, Object>();
            props.put("salListenerName", "arphandler");
            Set<String> propSet = new HashSet<String>();
            propSet.add(ArpHandler.ARP_EVENT_CACHE_NAME);
            props.put("cachenames", propSet);

            c.setInterface(new String[] {
                    IHostFinder.class.getName(),
                    IListenDataPacket.class.getName(),
                    ICacheUpdateAware.class.getName()}, props);

            // We need connection mgr to distribute packet out across the cluster
            c.add(createServiceDependency().setService(
                    IConnectionManager.class).setCallbacks("setConnectionManager",
                    "unsetConnectionManager").setRequired(true));


            c.add(createContainerServiceDependency(containerName).setService(
                    ISwitchManager.class).setCallbacks("setSwitchManager",
                    "unsetSwitchManager").setRequired(true));

            c.add(createContainerServiceDependency(containerName).setService(
                    ITopologyManager.class).setCallbacks("setTopologyManager",
                    "unsetTopologyMananger").setRequired(true));

            c.add(createContainerServiceDependency(containerName).setService(
                    IDataPacketService.class).setCallbacks(
                    "setDataPacketService", "unsetDataPacketService")
                    .setRequired(true));

            c.add(createContainerServiceDependency(containerName).setService(
                   IClusterContainerServices.class).setCallbacks(
                   "setClusterContainerService", "unsetClusterContainerService")
                   .setRequired(true));

            // the Host Listener is optional
            c.add(createContainerServiceDependency(containerName).setService(
                    IfHostListener.class).setCallbacks("setHostListener",
                    "unsetHostListener").setRequired(false));

            // the IfIptoHost is a required dependency
            c.add(createContainerServiceDependency(containerName).setService(
                    IfIptoHost.class).setCallbacks("setHostTracker",
                    "unsetHostTracker").setRequired(true));
        }
    }
}