/*
 * Copyright (c) 2016 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.l3vpn.unicast.ipv6;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.opendaylight.protocol.bgp.l3vpn.unicast.ipv6.VpnIpv6NlriParserTest.DISTINGUISHER;
import static org.opendaylight.protocol.bgp.l3vpn.unicast.ipv6.VpnIpv6NlriParserTest.IPV6PREFIX;
import static org.opendaylight.protocol.bgp.l3vpn.unicast.ipv6.VpnIpv6NlriParserTest.IPV6_VPN;
import static org.opendaylight.protocol.bgp.l3vpn.unicast.ipv6.VpnIpv6NlriParserTest.LABEL_STACK;
import static org.opendaylight.protocol.bgp.parser.spi.PathIdUtil.NON_PATH_ID;

import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import org.junit.Assert;
import org.junit.Test;
import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupportTest;
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.message.rev200120.path.attributes.Attributes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes1;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes2;
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.vpn.ipv6.rev180329.bgp.rib.rib.loc.rib.tables.routes.VpnIpv6RoutesCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.bgp.rib.rib.loc.rib.tables.routes.VpnIpv6RoutesCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.l3vpn.ipv6.destination.VpnIpv6DestinationBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.l3vpn.ipv6.routes.VpnIpv6Routes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.l3vpn.ipv6.routes.VpnIpv6RoutesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationVpnIpv6Case;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationVpnIpv6CaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRoute;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRouteBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRouteKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.common.Uint32;
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.tree.DataTreeCandidateNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;

public class VpnIpv6RIBSupportTest extends AbstractRIBSupportTest<VpnIpv6RoutesCase, VpnIpv6Routes, VpnRoute> {
    private VpnIpv6RIBSupport ribSupport;

    private static final DestinationVpnIpv6Case REACH_NLRI = new DestinationVpnIpv6CaseBuilder()
            .setVpnIpv6Destination(new VpnIpv6DestinationBuilder()
                    .setVpnDestination(Lists.newArrayList(IPV6_VPN)).build()).build();

    private static final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.update
            .attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationVpnIpv6Case UNREACH_NLRI =
            new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.ipv6.rev180329.update
                    .attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationVpnIpv6CaseBuilder()
                    .setVpnIpv6Destination(new VpnIpv6DestinationBuilder()
                            .setVpnDestination(Collections.singletonList(IPV6_VPN)).build()).build();
    private static final VpnRouteKey ROUTE_KEY = new VpnRouteKey(new PathId(Uint32.ZERO), "cAABAQIDBAECIAEjRVaJ");
    private static final VpnRoute ROUTE = new VpnRouteBuilder().setPathId(NON_PATH_ID)
            .setAttributes(ATTRIBUTES).setPrefix(IPV6PREFIX)
            .setLabelStack(LABEL_STACK).setRouteDistinguisher(DISTINGUISHER).withKey(ROUTE_KEY).build();
    private static final VpnIpv6Routes ROUTES = new VpnIpv6RoutesBuilder()
            .setVpnRoute(Map.of(ROUTE.key(), ROUTE)).build();

    @Override
    public void setUp() throws Exception {
        super.setUp();
        this.ribSupport = new VpnIpv6RIBSupport(this.adapter.currentSerializer());
        setUpTestCustomizer(this.ribSupport);
    }

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

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

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

    @Test
    public void testBuildMpUnreachNlriUpdate() {
        final Update update = this.ribSupport.buildUpdate(Collections.emptyList(), createRoutes(ROUTES), ATTRIBUTES);
        assertEquals(UNREACH_NLRI, update.getAttributes().augmentation(Attributes2.class)
                .getMpUnreachNlri().getWithdrawnRoutes().getDestinationType());
        assertNull(update.getAttributes().augmentation(Attributes1.class));
    }

    @Test
    public void testBuildMpReachNlriUpdate() {
        final Update update = this.ribSupport.buildUpdate(createRoutes(ROUTES), Collections.emptyList(), ATTRIBUTES);
        assertEquals(REACH_NLRI, update.getAttributes().augmentation(Attributes1.class).getMpReachNlri()
                .getAdvertizedRoutes().getDestinationType());
        assertNull(update.getAttributes().augmentation(Attributes2.class));
    }

    @Test
    public void testCacheableNlriObjects() {
        assertEquals(ImmutableSet.of(), this.ribSupport.cacheableNlriObjects());
    }

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

    @Test
    public void testRoutePath() {
        final NodeIdentifierWithPredicates prefixNii = createRouteNIWP(ROUTES);
        assertEquals(getRoutePath().node(prefixNii),
                this.ribSupport.routePath(getTablePath(), prefixNii));
    }

    @Test
    public void testRouteAttributesIdentifier() {
        assertEquals(new NodeIdentifier(QName.create(VpnIpv6Routes.QNAME,
                Attributes.QNAME.getLocalName().intern())), this.ribSupport.routeAttributesIdentifier());
    }

    @Test
    public void testRoutesCaseClass() {
        assertEquals(VpnIpv6RoutesCase.class, this.ribSupport.routesCaseClass());
    }

    @Test
    public void testRoutesContainerClass() {
        assertEquals(VpnIpv6Routes.class, this.ribSupport.routesContainerClass());
    }

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

    @Test
    public void testChangedRoutes() {
        final Routes emptyCase = new VpnIpv6RoutesCaseBuilder().build();
        DataTreeCandidateNode tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(),
                createRoutes(emptyCase)).getRootNode();
        Assert.assertTrue(this.ribSupport.changedRoutes(tree).isEmpty());

        final Routes emptyRoutes = new VpnIpv6RoutesCaseBuilder()
                .setVpnIpv6Routes(new VpnIpv6RoutesBuilder().build()).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(emptyRoutes)).getRootNode();
        Assert.assertTrue(this.ribSupport.changedRoutes(tree).isEmpty());

        final Routes routes = new VpnIpv6RoutesCaseBuilder().setVpnIpv6Routes(ROUTES).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(routes)).getRootNode();
        final Collection<DataTreeCandidateNode> result = this.ribSupport.changedRoutes(tree);
        Assert.assertFalse(result.isEmpty());
    }
}