/*
 * 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.evpn.impl;


import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.opendaylight.protocol.bgp.evpn.impl.EvpnTestUtil.RD;
import static org.opendaylight.protocol.bgp.evpn.impl.nlri.EthADRParserTest.ETHERNET_AD_ROUTE_CASE;
import static org.opendaylight.protocol.bgp.evpn.impl.nlri.EthADRParserTest.ETHERNET_AD_ROUTE_CASE_KEY;
import static org.opendaylight.protocol.bgp.parser.spi.PathIdUtil.NON_PATH_ID;

import com.google.common.collect.ImmutableSet;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.util.Collection;
import java.util.Collections;
import org.junit.Assert;
import org.junit.Test;
import org.opendaylight.protocol.bgp.evpn.impl.nlri.EvpnNlriParser;
import org.opendaylight.protocol.bgp.parser.spi.BGPExtensionProviderContext;
import org.opendaylight.protocol.bgp.parser.spi.pojo.SimpleBGPExtensionProviderContext;
import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupportTest;
import org.opendaylight.protocol.util.ByteArray;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.bgp.rib.rib.loc.rib.tables.routes.EvpnRoutesCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.bgp.rib.rib.loc.rib.tables.routes.EvpnRoutesCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.destination.EvpnDestination;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.destination.EvpnDestinationBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.routes.EvpnRoutes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.routes.EvpnRoutesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.routes.evpn.routes.EvpnRoute;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.routes.evpn.routes.EvpnRouteBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.routes.evpn.routes.EvpnRouteKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationEvpnCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationEvpnCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.update.attributes.mp.reach.nlri.advertized.routes.destination.type.destination.evpn._case.DestinationEvpnBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.Update;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.Attributes1;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.Attributes2;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.rib.tables.Attributes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.rib.tables.Routes;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.common.QName;
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.ChoiceNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;

public final class EvpnRibSupportTest extends AbstractRIBSupportTest {
    private static final EvpnRibSupport RIB_SUPPORT = EvpnRibSupport.getInstance();
    private static final EvpnRoute ROUTE;
    private static final EvpnRouteKey ROUTE_KEY;
    private static final EvpnDestination EVPN_DESTINATION = new EvpnDestinationBuilder().setRouteDistinguisher(RD).setEvpnChoice(ETHERNET_AD_ROUTE_CASE).build();
    private static final DestinationEvpnCase REACH_NLRI = new DestinationEvpnCaseBuilder().setDestinationEvpn(new DestinationEvpnBuilder()
        .setEvpnDestination(Collections.singletonList(EVPN_DESTINATION)).build()).build();
    private static final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationEvpnCase UNREACH_NLRI =
        new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.
            DestinationEvpnCaseBuilder().setDestinationEvpn(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.destination.evpn._case.
            DestinationEvpnBuilder().setEvpnDestination(Collections.singletonList(EVPN_DESTINATION)).build()).build();

    private static final EvpnRoutes EVPN_ROUTES;
    static {
        final BGPActivator act = new BGPActivator();
        final BGPExtensionProviderContext context = new SimpleBGPExtensionProviderContext();
        act.start(context);
        final ByteBuf buffer = Unpooled.buffer();
        EvpnNlriParser.serializeNlri(Collections.singletonList(new EvpnDestinationBuilder().setRouteDistinguisher(RD).setEvpnChoice(ETHERNET_AD_ROUTE_CASE_KEY).build()), buffer);
        ROUTE_KEY = new EvpnRouteKey(ByteArray.encodeBase64(buffer));
        ROUTE = new EvpnRouteBuilder().setRouteKey(ROUTE_KEY.getRouteKey()).setAttributes(ATTRIBUTES).setRouteDistinguisher(RD).setEvpnChoice(ETHERNET_AD_ROUTE_CASE).build();
        EVPN_ROUTES = new EvpnRoutesBuilder().setEvpnRoute(Collections.singletonList(ROUTE)).build();
    }


    @Override
    public void setUp() throws Exception {
        super.setUp();
        setUpTestCustomizer(RIB_SUPPORT);
    }

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

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


    @Test
    public void testEmptyRoute() throws Exception {
        final Routes empty = new EvpnRoutesCaseBuilder().setEvpnRoutes(new EvpnRoutesBuilder().setEvpnRoute(Collections.emptyList()).build()).build();
        final ChoiceNode emptyRoutes = RIB_SUPPORT.emptyRoutes();
        assertEquals(createRoutes(empty), emptyRoutes);
    }

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

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

    @Test
    public void testIsComplexRoute() {
        Assert.assertTrue(RIB_SUPPORT.isComplexRoute());
    }

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

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

    @Test
    public void testRouteIdAddPath() {
        Assert.assertNull(RIB_SUPPORT.getRouteIdAddPath(AbstractRIBSupportTest.PATH_ID, null));
    }

    @Test
    public void testRoutePath() {
        final NodeIdentifierWithPredicates prefixNii = createRouteNIWP(EVPN_ROUTES);
        Assert.assertEquals(getRoutePath().node(prefixNii), RIB_SUPPORT.routePath(getTablePath().node(Routes.QNAME), prefixNii));
    }

    @Test
    public void testExtractPathId() {
        Assert.assertEquals((Long) NON_PATH_ID, RIB_SUPPORT.extractPathId(null));
    }

    @Test
    public void testRouteAttributesIdentifier() {
        Assert.assertEquals(new NodeIdentifier(QName.create(EvpnRoutes.QNAME, Attributes.QNAME.getLocalName().intern())), RIB_SUPPORT
            .routeAttributesIdentifier());
    }

    @Test
    public void testRoutesCaseClass() {
        Assert.assertEquals(EvpnRoutesCase.class, RIB_SUPPORT.routesCaseClass());
    }

    @Test
    public void testRoutesContainerClass() {
        Assert.assertEquals(EvpnRoutes.class, RIB_SUPPORT.routesContainerClass());
    }

    @Test
    public void testRoutesListClass() {
        Assert.assertEquals(EvpnRoute.class, RIB_SUPPORT.routesListClass());
    }

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

        final Routes emptyRoutes = new EvpnRoutesCaseBuilder().setEvpnRoutes(new EvpnRoutesBuilder().build()).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(emptyRoutes)).getRootNode();
        Assert.assertTrue(RIB_SUPPORT.changedRoutes(tree).isEmpty());

        final Routes routes = new EvpnRoutesCaseBuilder().setEvpnRoutes(EVPN_ROUTES).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(routes)).getRootNode();
        final Collection<DataTreeCandidateNode> result = RIB_SUPPORT.changedRoutes(tree);
        Assert.assertFalse(result.isEmpty());
    }
}