/*
 * Copyright (C) 2013 Red Hat, Inc.
 *
 * 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
 *
 * Authors : Madhu Venugopal, Brent Salisbury
 */
package org.opendaylight.ovsdb.neutron;

import java.net.HttpURLConnection;

import org.opendaylight.controller.networkconfig.neutron.INeutronNetworkAware;
import org.opendaylight.controller.networkconfig.neutron.NeutronNetwork;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Handle requests for Neutron Network.
 */
public class NetworkHandler extends BaseHandler
                            implements INeutronNetworkAware {
    /**
     * Logger instance.
     */
    static final Logger logger = LoggerFactory.getLogger(NetworkHandler.class);

    /**
     * Invoked when a network creation is requested
     * to indicate if the specified network can be created.
     *
     * @param network  An instance of proposed new Neutron Network object.
     * @return A HTTP status code to the creation request.
     */
    @Override
    public int canCreateNetwork(NeutronNetwork network) {
        if (network.isShared()) {
            logger.error(" Network shared attribute not supported ");
            return HttpURLConnection.HTTP_NOT_ACCEPTABLE;
        }

        return HttpURLConnection.HTTP_CREATED;
    }

    /**
     * Invoked to take action after a network has been created.
     *
     * @param network  An instance of new Neutron Network object.
     */
    @Override
    public void neutronNetworkCreated(NeutronNetwork network) {
        int result = HttpURLConnection.HTTP_BAD_REQUEST;

        result = canCreateNetwork(network);
        if (result != HttpURLConnection.HTTP_CREATED) {
            logger.debug("Network creation failed {} ", result);
            return;
        }

        TenantNetworkManager.getManager().networkCreated(network.getID());
    }

    /**
     * Invoked when a network update is requested
     * to indicate if the specified network can be changed
     * using the specified delta.
     *
     * @param delta     Updates to the network object using patch semantics.
     * @param original  An instance of the Neutron Network object
     *                  to be updated.
     * @return A HTTP status code to the update request.
     */
    @Override
    public int canUpdateNetwork(NeutronNetwork delta,
                                NeutronNetwork original) {
        return HttpURLConnection.HTTP_OK;
    }

    /**
     * Invoked to take action after a network has been updated.
     *
     * @param network An instance of modified Neutron Network object.
     */
    @Override
    public void neutronNetworkUpdated(NeutronNetwork network) {
        return;
    }

    /**
     * Invoked when a network deletion is requested
     * to indicate if the specified network can be deleted.
     *
     * @param network  An instance of the Neutron Network object to be deleted.
     * @return A HTTP status code to the deletion request.
     */
    @Override
    public int canDeleteNetwork(NeutronNetwork network) {
        return HttpURLConnection.HTTP_OK;
    }

    /**
     * Invoked to take action after a network has been deleted.
     *
     * @param network  An instance of deleted Neutron Network object.
     */
    @Override
    public void neutronNetworkDeleted(NeutronNetwork network) {

        int result = canDeleteNetwork(network);
        if  (result != HttpURLConnection.HTTP_OK) {
            logger.error(" deleteNetwork validation failed for result - {} ",
                    result);
            return;
        }
        TenantNetworkManager.getManager().networkDeleted(network.getID());
    }
}