/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.fd.honeycomb.infra.bgp.neighbors;

import com.google.common.collect.Sets;
import com.google.inject.Inject;
import io.fd.honeycomb.infra.bgp.BgpConfiguration;
import io.fd.honeycomb.translate.impl.write.GenericListWriter;
import io.fd.honeycomb.translate.write.WriterFactory;
import io.fd.honeycomb.translate.write.registry.ModifiableWriterRegistryBuilder;
import javax.annotation.Nonnull;
import org.opendaylight.protocol.bgp.openconfig.spi.BGPTableTypeRegistryConsumer;
import org.opendaylight.protocol.bgp.rib.impl.spi.BGPPeerRegistry;
import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.multiprotocol.rev151009.bgp.common.afi.safi.list.AfiSafi;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.AfiSafis;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.Config;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.Timers;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.Transport;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbors.Neighbor;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.top.Bgp;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.top.bgp.Neighbors;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.network.instance.rev151018.network.instance.top.NetworkInstances;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.network.instance.rev151018.network.instance.top.network.instances.NetworkInstance;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.network.instance.rev151018.network.instance.top.network.instances.network.instance.Protocols;
import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.network.instance.rev151018.network.instance.top.network.instances.network.instance.protocols.Protocol;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.openconfig.extensions.rev160614.AfiSafi1;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.openconfig.extensions.rev160614.Config1;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.openconfig.extensions.rev160614.Config2;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.openconfig.extensions.rev160614.Protocol1;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;

/**
 * Initializes writer for Bgp Neighbors ({@link Neighbor} node) and all its parents required by HC infra.
 */
public final class BgpPeerWriterFactory implements WriterFactory {
    private static final InstanceIdentifier<NetworkInstance> NETWORK_INSTANCE_ID =
        InstanceIdentifier.create(NetworkInstances.class)
            .child(NetworkInstance.class);

    private static final InstanceIdentifier<Protocol> PROTOCOL_ID =
        NETWORK_INSTANCE_ID.child(Protocols.class).child(Protocol.class);

    private static final InstanceIdentifier<Neighbor> NEIGHBOR_ID =
        PROTOCOL_ID.augmentation(Protocol1.class).child(Bgp.class).child(Neighbors.class).child(Neighbor.class);

    @Inject
    private BgpConfiguration configuration;
    @Inject
    private RIB globalRib;
    @Inject
    private BGPTableTypeRegistryConsumer tableTypeRegistry;
    @Inject
    private BGPPeerRegistry peerRegistry;

    @Override
    public void init(@Nonnull final ModifiableWriterRegistryBuilder registry) {
        // NetworkInstances
        //  NetworkInstance =
        registry.add(new GenericListWriter<>(NETWORK_INSTANCE_ID,
            new NetworkInstanceCustomizer(configuration.bgpNetworkInstanceName)));

        //   Protocols
        //    Protocol =
        registry.add(
            new GenericListWriter<>(PROTOCOL_ID, new ProtocolCustomizer(configuration.bgpProtocolInstanceName.get())));

        //     Protocol1 augmentation (from bgp-openconfig-extensions)
        //      Bgp
        //       Neighbors
        //        Neighbor=
        final InstanceIdentifier<Neighbor> neighbor = InstanceIdentifier.create(Neighbor.class);
        registry.subtreeAdd(
            // TODO (HONEYCOMB-359): there might be more subnodes that needs to be handled
            Sets.newHashSet(
                neighbor.child(Config.class),
                neighbor.child(Config.class).augmentation(Config2.class),
                neighbor.child(AfiSafis.class),
                neighbor.child(AfiSafis.class).child(AfiSafi.class),
                neighbor.child(AfiSafis.class).child(AfiSafi.class).augmentation(AfiSafi1.class),
                neighbor.child(Timers.class),
                neighbor.child(Timers.class).child(
                    org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.timers.Config.class),
                neighbor.child(Transport.class),
                neighbor.child(Transport.class).child(
                    org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.transport.Config.class),
                neighbor.child(Transport.class).child(
                    org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbor.group.transport.Config.class)
                    .augmentation(Config1.class)
            ),
            new GenericListWriter<>(
                NEIGHBOR_ID,
                new NeighborCustomizer(globalRib, peerRegistry, tableTypeRegistry)));
    }
}