/*
 * 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.flowspec;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.opendaylight.protocol.bgp.parser.spi.PathIdUtil.NON_PATH_ID;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
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.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.bgp.rib.rib.loc.rib.tables.routes.FlowspecIpv6RoutesCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.bgp.rib.rib.loc.rib.tables.routes.FlowspecIpv6RoutesCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.Flowspec;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.FlowspecBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.group.ipv6.flowspec.flowspec.type.DestinationIpv6PrefixCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.group.ipv6.flowspec.flowspec.type.DestinationIpv6PrefixCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.ipv6.DestinationFlowspec;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.ipv6.DestinationFlowspecBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.ipv6.route.FlowspecRoute;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.ipv6.route.FlowspecRouteBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.ipv6.route.FlowspecRouteKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.ipv6.routes.FlowspecIpv6Routes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.ipv6.routes.FlowspecIpv6RoutesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationFlowspecIpv6Case;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationFlowspecIpv6CaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.PathId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes1;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes2;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.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 class FlowspecIpv6RIBSupportTest extends AbstractRIBSupportTest {

    private static final FlowspecIpv6RIBSupport RIB_SUPPORT;
    private static final FlowspecRoute ROUTE;
    private static final FlowspecRouteKey ROUTE_KEY;
    private static final PathId PATH_ID = new PathId(1L);

    private static final DestinationIpv6PrefixCase DEST_PREFIX = new DestinationIpv6PrefixCaseBuilder().setDestinationPrefix(new Ipv6Prefix("2001:db8:1:2::/64")).build();
    private static final List<Flowspec> FLOW_LIST = Collections.singletonList(new FlowspecBuilder().setFlowspecType(DEST_PREFIX).build());
    private final static DestinationFlowspec DEST_FLOW = new DestinationFlowspecBuilder().setFlowspec(FLOW_LIST).setPathId(PATH_ID).build();
    private static final DestinationFlowspecIpv6Case REACH_NLRI = new DestinationFlowspecIpv6CaseBuilder().setDestinationFlowspec(DEST_FLOW).build();
    private static final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.update
        .attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationFlowspecIpv6Case UNREACH_NLRI = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.update
        .attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationFlowspecIpv6CaseBuilder().setDestinationFlowspec(DEST_FLOW).build();
    private static final FlowspecIpv6Routes ROUTES;
    static {
        final SimpleFlowspecExtensionProviderContext fs_context = new SimpleFlowspecExtensionProviderContext();
        final FlowspecActivator activator = new FlowspecActivator(fs_context);
        final BGPActivator act = new BGPActivator(fs_context, activator);
        final BGPExtensionProviderContext context = new SimpleBGPExtensionProviderContext();
        act.start(context);
        RIB_SUPPORT = FlowspecIpv6RIBSupport.getInstance(fs_context);

        final SimpleFlowspecIpv6NlriParser parser = new SimpleFlowspecIpv6NlriParser(
            fs_context.getFlowspecTypeRegistry(SimpleFlowspecExtensionProviderContext.AFI.IPV4, SimpleFlowspecExtensionProviderContext.SAFI.FLOWSPEC));

        ROUTE_KEY = new FlowspecRouteKey(PATH_ID, parser.stringNlri(FLOW_LIST));
        ROUTE = new FlowspecRouteBuilder().setKey(ROUTE_KEY).setPathId(PATH_ID).setFlowspec(FLOW_LIST)
            .setAttributes(new AttributesBuilder().build()).build();
        ROUTES = new FlowspecIpv6RoutesBuilder().setFlowspecRoute(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<FlowspecRoute> instanceIdentifier = (InstanceIdentifier<FlowspecRoute>) this.deletedRoutes.get(0);
        assertEquals(ROUTE_KEY, instanceIdentifier.firstKeyOf(FlowspecRoute.class));
    }

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

    @Test
    public void testEmptyRoute() throws Exception {
        final Routes empty = new FlowspecIpv6RoutesCaseBuilder().setFlowspecIpv6Routes(
            new FlowspecIpv6RoutesBuilder().setFlowspecRoute(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(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(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() {
        final NodeIdentifierWithPredicates expected = createRouteNIWP(new FlowspecIpv6RoutesBuilder().
            setFlowspecRoute(Collections.singletonList(ROUTE)).build());
        final NodeIdentifierWithPredicates prefixNii = new NodeIdentifierWithPredicates(RIB_SUPPORT.routeQName(),
            ImmutableMap.of(RIB_SUPPORT.routeKeyQName(), ROUTE_KEY.getRouteKey()));
        Assert.assertEquals(expected, RIB_SUPPORT.getRouteIdAddPath(AbstractRIBSupportTest.PATH_ID, prefixNii));
    }

    @Test
    public void testRoutePath() {
        final NodeIdentifierWithPredicates prefixNii = createRouteNIWP(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(FlowspecIpv6Routes.QNAME,
            org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Attributes.QNAME.getLocalName().intern())),
            RIB_SUPPORT.routeAttributesIdentifier());
    }

    @Test
    public void testRoutesCaseClass() {
        Assert.assertEquals(FlowspecIpv6RoutesCase.class, RIB_SUPPORT.routesCaseClass());
    }

    @Test
    public void testRoutesContainerClass() {
        Assert.assertEquals(FlowspecIpv6Routes.class, RIB_SUPPORT.routesContainerClass());
    }

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

    @Test
    public void testChangedRoutes() {
        final Routes emptyCase = new FlowspecIpv6RoutesCaseBuilder().build();
        DataTreeCandidateNode tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(emptyCase)).getRootNode();
        Assert.assertTrue(RIB_SUPPORT.changedRoutes(tree).isEmpty());

        final Routes emptyRoutes = new FlowspecIpv6RoutesCaseBuilder().setFlowspecIpv6Routes(new FlowspecIpv6RoutesBuilder().build()).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(emptyRoutes)).getRootNode();
        Assert.assertTrue(RIB_SUPPORT.changedRoutes(tree).isEmpty());

        final Routes routes = new FlowspecIpv6RoutesCaseBuilder().setFlowspecIpv6Routes(new FlowspecIpv6RoutesBuilder()
            .setFlowspecRoute(Collections.singletonList(ROUTE)).build()).build();
        tree = DataTreeCandidates.fromNormalizedNode(getRoutePath(), createRoutes(routes)).getRootNode();
        final Collection<DataTreeCandidateNode> result = RIB_SUPPORT.changedRoutes(tree);
        Assert.assertFalse(result.isEmpty());
    }
}