/*
 * Copyright (c) 2017 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.netvirt.elan.l2gw.utils;

import java.util.Collections;
import java.util.List;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.opendaylight.infrautils.inject.AbstractLifecycle;
import org.opendaylight.mdsal.binding.api.DataBroker;
import org.opendaylight.netvirt.elan.utils.ElanClusterUtils;
import org.opendaylight.netvirt.elanmanager.api.IL2gwService;
import org.opendaylight.netvirt.neutronvpn.api.l2gw.L2GatewayDevice;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rpcs.rev160406.ItmRpcService;
import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.l2gatewayconnections.L2gatewayConnection;
import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateways.attributes.l2gateways.L2gateway;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Created by eaksahu on 3/15/2017.
 */
@Singleton
public class L2gwServiceProvider extends AbstractLifecycle implements IL2gwService {

    private static final Logger LOG = LoggerFactory.getLogger(L2gwServiceProvider.class);

    private final DataBroker dataBroker;
    private final ItmRpcService itmRpcService;
    private final L2GatewayConnectionUtils l2GatewayConnectionUtils;
    private final ElanClusterUtils elanClusterUtils;

    @Inject
    public L2gwServiceProvider(final DataBroker dataBroker, final ElanClusterUtils elanClusterUtils,
                               ItmRpcService itmRpcService, L2GatewayConnectionUtils l2GatewayConnectionUtils) {
        this.dataBroker = dataBroker;
        this.elanClusterUtils = elanClusterUtils;
        this.itmRpcService = itmRpcService;
        this.l2GatewayConnectionUtils = l2GatewayConnectionUtils;
    }

    @Override
    public void provisionItmAndL2gwConnection(L2GatewayDevice l2GwDevice, String psName,
                                              String hwvtepNodeId, IpAddress tunnelIpAddr) {
        elanClusterUtils.runOnlyInOwnerNode(hwvtepNodeId, "Handling Physical Switch add create itm tunnels ",
            () -> {
                LOG.info("Creating itm tunnel for {}", tunnelIpAddr);
                ElanL2GatewayUtils.createItmTunnels(dataBroker, itmRpcService, hwvtepNodeId, psName, tunnelIpAddr);
                return Collections.emptyList();
            });

        List<L2gatewayConnection> l2GwConns = L2GatewayConnectionUtils.getAssociatedL2GwConnections(
                dataBroker, l2GwDevice.getL2GatewayIds());
        LOG.debug("L2GatewayConnections associated for {} physical switch", psName);
        if (l2GwConns == null || l2GwConns.isEmpty()) {
            LOG.info("No connections are provisioned for {} {} {}", l2GwDevice, psName, hwvtepNodeId);
        }
        for (L2gatewayConnection l2GwConn : l2GwConns) {
            LOG.trace("L2GatewayConnection {} changes executed on physical switch {}",
                    l2GwConn.getL2gatewayId(), psName);
            l2GatewayConnectionUtils.addL2GatewayConnection(l2GwConn, psName);
        }
    }

    @Override
    public List<L2gatewayConnection> getL2GwConnectionsByL2GatewayId(Uuid l2GatewayId) {
        return l2GatewayConnectionUtils.getL2GwConnectionsByL2GatewayId(l2GatewayId);
    }

    @Override
    public void addL2GatewayConnection(L2gatewayConnection input) {
        l2GatewayConnectionUtils.addL2GatewayConnection(input);
    }

    @Override
    public void addL2GatewayConnection(L2gatewayConnection input,
                                       String l2GwDeviceName,
                                       L2gateway l2Gateway) {
        l2GatewayConnectionUtils.addL2GatewayConnection(input, l2GwDeviceName, l2Gateway);
    }

    @Override
    public List<L2gatewayConnection> getAssociatedL2GwConnections(Set<Uuid> l2GatewayIds) {
        return L2GatewayConnectionUtils.getAssociatedL2GwConnections(dataBroker, l2GatewayIds);
    }

    @Override
    protected void start() {
        LOG.info("Starting L2gwServiceProvider");
    }

    @Override
    protected void stop() {

    }
}