/*
 * Copyright (c) 2018 AT&T Intellectual Property. 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.mvpn.impl;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.util.Collection;
import java.util.List;
import java.util.Set;
import org.junit.Test;
import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupportTest;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.PathId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.Update;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.AttributesReach;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.AttributesUnreach;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.bgp.rib.rib.loc.rib.tables.routes.MvpnRoutesIpv6Case;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.bgp.rib.rib.loc.rib.tables.routes.MvpnRoutesIpv6CaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.mvpn.destination.MvpnDestination;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.mvpn.destination.MvpnDestinationBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.mvpn.routes.ipv6.MvpnRoutesIpv6;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.mvpn.routes.ipv6.MvpnRoutesIpv6Builder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationMvpnIpv6AdvertizedCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationMvpnIpv6AdvertizedCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.update.attributes.mp.reach.nlri.advertized.routes.destination.type.destination.mvpn.ipv6.advertized._case.DestinationMvpnBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationMvpnIpv6WithdrawnCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6.rev180417.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationMvpnIpv6WithdrawnCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.rev200120.inter.as.i.pmsi.a.d.grouping.InterAsIPmsiADBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.rev200120.mvpn.MvpnChoice;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.rev200120.mvpn.mvpn.choice.InterAsIPmsiADCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.rev200120.mvpn.routes.MvpnRoute;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.rev200120.mvpn.routes.MvpnRouteBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.rev200120.mvpn.routes.MvpnRouteKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.tables.Attributes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.tables.Routes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.RdIpv4;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.RouteDistinguisher;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.util.BindingMap;
import org.opendaylight.yangtools.yang.common.Uint32;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidateNode;
import org.opendaylight.yangtools.yang.data.tree.spi.DataTreeCandidates;

public final class MvpnIpv6RIBSupportTest
        extends AbstractRIBSupportTest<MvpnRoutesIpv6Case, MvpnRoutesIpv6, MvpnRoute> {
    private static final PathId PATH_ID = new PathId(Uint32.ZERO);
    private static final MvpnChoice MVPN = new InterAsIPmsiADCaseBuilder().setInterAsIPmsiAD(
            new InterAsIPmsiADBuilder()
                    .setSourceAs(new AsNumber(Uint32.ONE))
                    .setRouteDistinguisher(new RouteDistinguisher(new RdIpv4("1.2.3.4:258")))
                    .build()).build();
    private static final MvpnRouteKey ROUTE_KEY = new MvpnRouteKey(PATH_ID, "AgwAAQECAwQBAgAAAAE=");
    private static final MvpnRoute ROUTE = new MvpnRouteBuilder()
                .setRouteKey(ROUTE_KEY.getRouteKey())
            .setPathId(ROUTE_KEY.getPathId())
            .setAttributes(ATTRIBUTES)
                .setMvpnChoice(MVPN)
                .build();
    private static final MvpnRoutesIpv6 MVPN_ROUTES
            = new MvpnRoutesIpv6Builder().setMvpnRoute(BindingMap.of(ROUTE)).build();
    private static final MvpnDestination MVPN_DESTINATION = new MvpnDestinationBuilder()
            .setMvpnChoice(MVPN)
            .setPathId(PATH_ID)
            .build();
    private static final DestinationMvpnIpv6AdvertizedCase REACH_NLRI = new DestinationMvpnIpv6AdvertizedCaseBuilder()
            .setDestinationMvpn(new DestinationMvpnBuilder()
                    .setMvpnDestination(List.of(MVPN_DESTINATION)).build()).build();
    private static final DestinationMvpnIpv6WithdrawnCase UNREACH_NLRI = new DestinationMvpnIpv6WithdrawnCaseBuilder()
            .setDestinationMvpn(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv6
                    .rev180417.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.destination.mvpn
                    .ipv6.withdrawn._case.DestinationMvpnBuilder()
                    .setMvpnDestination(List.of(MVPN_DESTINATION)).build()).build();

    private MvpnIpv6RIBSupport ribSupport;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        ribSupport = new MvpnIpv6RIBSupport(adapter.currentSerializer());
        setUpTestCustomizer(ribSupport);
    }

    @Test
    public void testDeleteRoutes() {
        final ContainerNode withdraw = createNlriWithDrawnRoute(UNREACH_NLRI);
        ribSupport.deleteRoutes(tx, getTablePath(), withdraw);
        final InstanceIdentifier<MvpnRoute> instanceIdentifier = deletedRoutes.get(0);
        assertEquals(ROUTE_KEY, instanceIdentifier.firstKeyOf(MvpnRoute.class));
    }

    @Test
    public void testPutRoutes() {
        ribSupport.putRoutes(tx, getTablePath(), createNlriAdvertiseRoute(REACH_NLRI), createAttributes());
        final MvpnRoute route = (MvpnRoute) insertedRoutes.get(0).getValue();
        assertEquals(ROUTE, route);
    }


    @Test
    public void testEmptyRoute() {
        assertEquals(createEmptyTable(), ribSupport.emptyTable());
    }

    @Test
    public void testBuildMpUnreachNlriUpdate() {
        final Collection<MapEntryNode> routes = createRoutes(MVPN_ROUTES);
        final Update update = ribSupport.buildUpdate(List.of(), routes, ATTRIBUTES);
        assertEquals(UNREACH_NLRI, update.getAttributes().augmentation(AttributesUnreach.class).getMpUnreachNlri()
                .getWithdrawnRoutes().getDestinationType());
        assertNull(update.getAttributes().augmentation(AttributesReach.class));
    }

    @Test
    public void testBuildMpReachNlriUpdate() {
        final Collection<MapEntryNode> routes = createRoutes(MVPN_ROUTES);
        final Update update = ribSupport.buildUpdate(routes, List.of(), ATTRIBUTES);
        assertEquals(REACH_NLRI, update.getAttributes().augmentation(AttributesReach.class).getMpReachNlri()
                .getAdvertizedRoutes().getDestinationType());
        assertNull(update.getAttributes().augmentation(AttributesUnreach.class));
    }

    @Test
    public void testCacheableNlriObjects() {
        assertEquals(Set.of(MvpnRoutesIpv6Case.class), ribSupport.cacheableNlriObjects());
    }

    @Test
    public void testCacheableAttributeObjects() {
        assertEquals(Set.of(), ribSupport.cacheableAttributeObjects());
    }

    @Test
    public void testRoutePath() {
        final NodeIdentifierWithPredicates prefixNii = createRouteNIWP(MVPN_ROUTES);
        final YangInstanceIdentifier expected = getRoutePath().node(prefixNii);
        final YangInstanceIdentifier actual = ribSupport.routePath(getTablePath(), prefixNii);
        assertEquals(expected, actual);
    }

    @Test
    public void testRouteAttributesIdentifier() {
        assertEquals(new NodeIdentifier(Attributes.QNAME.bindTo(MvpnRoutesIpv6Case.QNAME.getModule())),
            ribSupport.routeAttributesIdentifier());
    }

    @Test
    public void testRoutesCaseClass() {
        assertEquals(MvpnRoutesIpv6Case.class, ribSupport.routesCaseClass());
    }

    @Test
    public void testRoutesContainerClass() {
        assertEquals(MvpnRoutesIpv6.class, ribSupport.routesContainerClass());
    }

    @Test
    public void testRoutesListClass() {
        assertEquals(MvpnRoute.class, ribSupport.routesListClass());
    }

    @Test
    public void testChangedRoutes() {
        final Routes emptyCase = new MvpnRoutesIpv6CaseBuilder().build();
        DataTreeCandidateNode tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(),
                createRoutes(emptyCase)).getRootNode();
        assertTrue(ribSupport.changedRoutes(tree).isEmpty());

        final Routes emptyRoutes
                = new MvpnRoutesIpv6CaseBuilder().setMvpnRoutesIpv6(new MvpnRoutesIpv6Builder().build()).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(emptyRoutes)).getRootNode();
        assertTrue(ribSupport.changedRoutes(tree).isEmpty());

        final Routes routes = new MvpnRoutesIpv6CaseBuilder().setMvpnRoutesIpv6(MVPN_ROUTES).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(routes)).getRootNode();
        final Collection<DataTreeCandidateNode> result = ribSupport.changedRoutes(tree);
        assertFalse(result.isEmpty());
    }
}