/*
 * Copyright (c) 2015 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.protocol.bgp.inet;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.bgp.rib.rib.loc.rib.tables.routes.Ipv4RoutesCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4Builder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.routes.Ipv4Routes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.routes.ipv4.routes.Ipv4Route;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv4CaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.Ipv4PrefixAndPathId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.destination.DestinationType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.Ipv4AddressFamily;
import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;

/**
 * Class supporting IPv4 unicast RIBs.
 */
final class IPv4RIBSupport extends AbstractIPRibSupport<Ipv4RoutesCase, Ipv4Routes, Ipv4Route> {
    IPv4RIBSupport(final BindingNormalizedNodeSerializer mappingService) {
        super(mappingService,
            Ipv4PrefixAndPathId.class,
            Ipv4AddressFamily.VALUE, Ipv4AddressFamily.QNAME,
            Ipv4RoutesCase.class, Ipv4RoutesCase.QNAME,
            Ipv4Routes.class, Ipv4Routes.QNAME,
            Ipv4Route.class, Ipv4Route.QNAME,
            DestinationIpv4.QNAME, Ipv4Prefixes.QNAME);
    }

    private List<Ipv4Prefixes> extractPrefixes(final Collection<MapEntryNode> routes) {
        final var prefs = new ArrayList<Ipv4Prefixes>(routes.size());
        for (var route : routes) {
            final var prefix = (String) NormalizedNodes.findNode(route, routePrefixIdentifier()).orElseThrow().body();
            prefs.add(new Ipv4PrefixesBuilder()
                .setPrefix(new Ipv4Prefix(prefix)).setPathId(PathIdUtil.buildPathId(route, routePathIdNid()))
                .build());
        }
        return prefs;
    }

    @Override
    protected DestinationType buildDestination(final Collection<MapEntryNode> routes) {
        return new DestinationIpv4CaseBuilder().setDestinationIpv4(new DestinationIpv4Builder()
                .setIpv4Prefixes(extractPrefixes(routes)).build()).build();
    }

    @Override
    protected DestinationType buildWithdrawnDestination(final Collection<MapEntryNode> routes) {
        return new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update
                .attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv4CaseBuilder()
                .setDestinationIpv4(new DestinationIpv4Builder().setIpv4Prefixes(extractPrefixes(routes))
                        .build()).build();
    }
}