/*
 * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. 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.vpnservice.neutronvpn.l2gw;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

import org.opendaylight.vpnservice.neutronvpn.api.l2gw.L2GatewayDevice;
import org.opendaylight.vpnservice.utils.hwvtep.HwvtepSouthboundConstants;
import org.opendaylight.vpnservice.utils.hwvtep.HwvtepSouthboundUtils;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.itm.rpcs.rev151217.AddL2GwDeviceInputBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.itm.rpcs.rev151217.DeleteL2GwDeviceInputBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.itm.rpcs.rev151217.ItmRpcService;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
import org.opendaylight.yangtools.yang.common.RpcResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class L2GatewayUtils {
    private static final Logger LOG = LoggerFactory.getLogger(L2GatewayUtils.class);

    protected static boolean isGatewayAssociatedToL2Device(L2GatewayDevice l2GwDevice) {
        return (l2GwDevice.getL2GatewayIds().size() > 0);
    }

    protected static boolean isLastL2GatewayBeingDeleted(L2GatewayDevice l2GwDevice) {
        return (l2GwDevice.getL2GatewayIds().size() == 1);
    }

    protected static boolean isL2GwDeviceConnected(L2GatewayDevice l2GwDevice) {
        return (l2GwDevice.getHwvtepNodeId() != null);
    }

    protected static boolean isItmTunnelsCreatedForL2Device(L2GatewayDevice l2GwDevice) {
        return (l2GwDevice.getHwvtepNodeId() != null && l2GwDevice.getL2GatewayIds().size() > 0);
    }

    protected static void createItmTunnels(ItmRpcService itmRpcService, String hwvtepId, String psName,
            IpAddress tunnelIp) {
        AddL2GwDeviceInputBuilder builder = new AddL2GwDeviceInputBuilder();
        builder.setTopologyId(HwvtepSouthboundConstants.HWVTEP_TOPOLOGY_ID.getValue());
        builder.setNodeId(HwvtepSouthboundUtils.createManagedNodeId(new NodeId(hwvtepId), psName).getValue());
        builder.setIpAddress(tunnelIp);
        try {
            Future<RpcResult<Void>> result = itmRpcService.addL2GwDevice(builder.build());
            RpcResult<Void> rpcResult = result.get();
            if (rpcResult.isSuccessful()) {
                LOG.info("Created ITM tunnels for {}", hwvtepId);
            } else {
                LOG.error("Failed to create ITM Tunnels: ", rpcResult.getErrors());
            }
        } catch (InterruptedException | ExecutionException e) {
            LOG.error("RPC to create ITM tunnels failed", e);
        }
    }

    protected static void deleteItmTunnels(ItmRpcService itmRpcService, String hwvtepId, String psName,
            IpAddress tunnelIp) {
        DeleteL2GwDeviceInputBuilder builder = new DeleteL2GwDeviceInputBuilder();
        builder.setTopologyId(HwvtepSouthboundConstants.HWVTEP_TOPOLOGY_ID.getValue());
        builder.setNodeId(HwvtepSouthboundUtils.createManagedNodeId(new NodeId(hwvtepId), psName).getValue());
        builder.setIpAddress(tunnelIp);
        try {
            Future<RpcResult<Void>> result = itmRpcService.deleteL2GwDevice(builder.build());
            RpcResult<Void> rpcResult = result.get();
            if (rpcResult.isSuccessful()) {
                LOG.info("Deleted ITM tunnels for {}", hwvtepId);
            } else {
                LOG.error("Failed to delete ITM Tunnels: ", rpcResult.getErrors());
            }
        } catch (InterruptedException | ExecutionException e) {
            LOG.error("RPC to delete ITM tunnels failed", e);
        }
    }
}