/*
 * Copyright (c) 2014 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.rib.impl;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import com.google.common.base.Optional;
import com.google.common.util.concurrent.CheckedFuture;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
import org.opendaylight.protocol.bgp.rib.impl.spi.BGPDispatcher;
import org.opendaylight.protocol.bgp.rib.spi.AdjRIBsIn;
import org.opendaylight.protocol.bgp.rib.spi.RIBExtensionProviderContext;
import org.opendaylight.protocol.bgp.rib.spi.SimpleRIBExtensionProviderContext;
import org.opendaylight.protocol.framework.ReconnectStrategyFactory;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.AsNumber;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.DomainIdentifier;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.Identifier;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.Ipv4InterfaceIdentifier;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.LinkstateAddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.LinkstateSubsequentAddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.ProtocolId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.TopologyIdentifier;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.destination.CLinkstateDestination;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.LinkstateRoutes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.LinkstateRoute;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.LinkstateRouteBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.LinkstateRouteKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.linkstate.route.object.type.LinkCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.linkstate.route.object.type.link._case.LinkDescriptorsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.linkstate.route.object.type.link._case.LocalNodeDescriptors;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.linkstate.route.object.type.link._case.LocalNodeDescriptorsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.linkstate.route.object.type.link._case.RemoteNodeDescriptors;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.linkstate.routes.linkstate.routes.linkstate.route.object.type.link._case.RemoteNodeDescriptorsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.node.identifier.c.router.identifier.IsisNodeCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.node.identifier.c.router.identifier.OspfNodeCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.node.identifier.c.router.identifier.isis.node._case.IsisNodeBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev131125.node.identifier.c.router.identifier.ospf.node._case.OspfNodeBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.ApplicationRibId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.BgpRib;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.BgpRibBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.RibId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.Route;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.Rib;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.RibKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.LocRib;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.Tables;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.routes.ipv4.routes._case.Ipv4Routes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.routes.ipv4.routes._case.ipv4.routes.Ipv4Route;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.routes.ipv4.routes._case.ipv4.routes.Ipv4RouteBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.routes.ipv4.routes._case.ipv4.routes.Ipv4RouteKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.route.AttributesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;

public class ApplicationPeerTest {

    private final TablesKey tk = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
    private final TablesKey lk = new TablesKey(LinkstateAddressFamily.class, LinkstateSubsequentAddressFamily.class);

    private RIBImpl r;

    @Mock
    BGPDispatcher dispatcher;

    @Mock
    ReconnectStrategyFactory tcpStrategyFactory;

    @Mock
    DataBroker dps;

    @Mock
    ReadWriteTransaction trans;

    @Mock
    WriteTransaction transWrite;

    @Mock
    BindingTransactionChain chain;

    @Mock
    ApplicationPeer peer;

    @Mock
    AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change;

    @Mock
    CheckedFuture<?,?> future;

    @Mock
    Optional<Rib> o;

    List<InstanceIdentifier<?>> routes;

    private final byte[] linkNlri = new byte[] { 0, 2, 0, (byte) 0x65, 2, 0, 0,
        0, 0, 0, 0, 0, 1, 1, 0, 0, (byte) 0x1a,
        (byte) 0x02, (byte) 0x00, (byte) 0x00, (byte) 0x04, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x48, (byte) 0x02, (byte) 0x01,
        (byte) 0x00, (byte) 0x04, (byte) 0x28, (byte) 0x28, (byte) 0x28, (byte) 0x28, (byte) 0x02, (byte) 0x03, (byte) 0x00, (byte) 0x06,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x42, (byte) 0x01, (byte) 0x01, (byte) 0x00, (byte) 0x18,
        (byte) 0x02, (byte) 0x00, (byte) 0x00, (byte) 0x04, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x48, (byte) 0x02, (byte) 0x01,
        (byte) 0x00, (byte) 0x04, (byte) 0x28, (byte) 0x28, (byte) 0x28, (byte) 0x28, (byte) 0x02, (byte) 0x03, (byte) 0x00, (byte) 0x04,
        (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x40, 1, 2, 0, 8, 1, 2, 3, 4, 0x0a, 0x0b, 0x0c, 0x0d,
        (byte) 0x01, (byte) 0x03, (byte) 0x00, (byte) 0x04, (byte) 0xc5, (byte) 0x14,
        (byte) 0xa0, (byte) 0x2a, (byte) 0x01, (byte) 0x04, (byte) 0x00, (byte) 0x04, (byte) 0xc5, (byte) 0x14, (byte) 0xa0, (byte) 0x28,
        1, 7, 0, 2, 0, 3};

    @SuppressWarnings("unchecked")
    @Before
    public void setUp() throws InterruptedException, ExecutionException {
        MockitoAnnotations.initMocks(this);
        final List<BgpTableType> localTables = new ArrayList<>();
        this.routes = new ArrayList<>();
        localTables.add(new BgpTableTypeImpl(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class));
        localTables.add(new BgpTableTypeImpl(LinkstateAddressFamily.class, LinkstateSubsequentAddressFamily.class));
        final RIBExtensionProviderContext context = new SimpleRIBExtensionProviderContext();
        final RIBActivator a1 = new RIBActivator();
        a1.startRIBExtensionProvider(context);
        final org.opendaylight.protocol.bgp.linkstate.RIBActivator a2 = new org.opendaylight.protocol.bgp.linkstate.RIBActivator();
        a2.startRIBExtensionProvider(context);
        Mockito.doReturn(this.trans).when(this.dps).newReadWriteTransaction();
        Mockito.doReturn(this.chain).when(this.dps).createTransactionChain(Mockito.any(RIBImpl.class));
        Mockito.doReturn(this.trans).when(this.chain).newReadWriteTransaction();
        Mockito.doReturn(this.future).when(this.trans).read(Mockito.eq(LogicalDatastoreType.OPERATIONAL), Mockito.any(InstanceIdentifier.class));
        Mockito.doReturn(this.o).when(this.future).get();
        Mockito.doNothing().when(this.trans).merge(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.builder(BgpRib.class).build(), new BgpRibBuilder().build());
        Mockito.doNothing().when(this.trans).put(Mockito.eq(LogicalDatastoreType.OPERATIONAL), Mockito.any(InstanceIdentifier.class), Mockito.any(Rib.class));
        Mockito.doAnswer(new Answer<Object>() {

            @Override
            public Object answer(final InvocationOnMock invocation) throws Throwable {
                final Object[] args = invocation.getArguments();
                ApplicationPeerTest.this.routes.add((InstanceIdentifier<?>) args[1]);
                return args[1];
            }
        }).when(this.transWrite).put(Mockito.eq(LogicalDatastoreType.OPERATIONAL), Mockito.any(InstanceIdentifier.class), Mockito.any(Route.class), Mockito.eq(true));
        Mockito.doNothing().when(this.transWrite).merge(Mockito.eq(LogicalDatastoreType.OPERATIONAL), Mockito.any(InstanceIdentifier.class), Mockito.any(org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Attributes.class));
        Mockito.doReturn(false).when(this.o).isPresent();
        Mockito.doReturn(this.future).when(this.trans).submit();
        Mockito.doReturn(this.future).when(this.transWrite).submit();
        Mockito.doNothing().when(this.future).addListener(Mockito.any(Runnable.class), Mockito.any(Executor.class));
        Mockito.doReturn(this.transWrite).when(this.chain).newWriteOnlyTransaction();
        Mockito.doAnswer(new Answer<Object>() {

            @Override
            public Object answer(final InvocationOnMock invocation) throws Throwable {
                final Object[] args = invocation.getArguments();
                ApplicationPeerTest.this.routes.remove(args[1]);
                return args[1];
            }
        }).when(this.transWrite).delete(Mockito.eq(LogicalDatastoreType.OPERATIONAL), Mockito.any(InstanceIdentifier.class));
        this.r = new RIBImpl(new RibId("test"), new AsNumber(5L), new Ipv4Address("127.0.0.1"),
            context , this.dispatcher, this.tcpStrategyFactory, this.tcpStrategyFactory, this.dps, localTables);
        this.peer = new ApplicationPeer(new ApplicationRibId("t"), new Ipv4Address("127.0.0.1"), this.r);
    }

    @Test
    public void testOnDataChanged() {
        final Map<InstanceIdentifier<?>, DataObject> created = new HashMap<>();
        final AdjRIBsIn<Ipv4Prefix, Ipv4Route> a4 = this.r.getTable(this.tk);
        assertNotNull(a4);

        InstanceIdentifier<?> iid = InstanceIdentifier.create(BgpRib.class).child(Rib.class, new RibKey(new RibId("foo")))
            .child(LocRib.class).child(Tables.class, this.tk)
            .child(Ipv4Routes.class).child(Ipv4Route.class, new Ipv4RouteKey(new Ipv4Prefix("127.0.0.1/32")));
        created.put(iid, new Ipv4RouteBuilder().setPrefix(new Ipv4Prefix("127.0.0.1/32")).setAttributes(new AttributesBuilder().build()).build());

        final Map<InstanceIdentifier<?>, DataObject> updated = new HashMap<>();
        final AdjRIBsIn<CLinkstateDestination, LinkstateRoute> al = this.r.getTable(this.lk);
        assertNotNull(al);

        iid = InstanceIdentifier.create(BgpRib.class).child(Rib.class, new RibKey(new RibId("foo")))
            .child(LocRib.class).child(Tables.class, this.lk)
            .child((Class)LinkstateRoutes.class).child(LinkstateRoute.class, new LinkstateRouteKey(this.linkNlri));
        final LocalNodeDescriptors lnd = new LocalNodeDescriptorsBuilder().setAsNumber(new AsNumber(72L)).setDomainId(new DomainIdentifier(673720360L))
            .setCRouterIdentifier(new IsisNodeCaseBuilder().setIsisNode(new IsisNodeBuilder().setIsoSystemId(new IsoSystemIdentifier(new byte[] { 0, 0, 0, 0, 0, 66 })).build()).build()).build();
        final RemoteNodeDescriptors rnd = new RemoteNodeDescriptorsBuilder().setAsNumber(new AsNumber(72L)).setDomainId(new DomainIdentifier(673720360L))
            .setCRouterIdentifier(new OspfNodeCaseBuilder().setOspfNode(new OspfNodeBuilder().setOspfRouterId(64L).build()).build()).build();
        updated.put(iid, new LinkstateRouteBuilder().setProtocolId(ProtocolId.IsisLevel2).setIdentifier(new Identifier(BigInteger.ONE)).setObjectType(
            new LinkCaseBuilder().setLinkDescriptors(new LinkDescriptorsBuilder().setIpv4InterfaceAddress(new Ipv4InterfaceIdentifier(new Ipv4Address("197.20.160.42")))
                .setIpv4NeighborAddress(new Ipv4InterfaceIdentifier(new Ipv4Address("197.20.160.40"))).setLinkLocalIdentifier(16909060L).setLinkRemoteIdentifier(168496141L).setMultiTopologyId(new TopologyIdentifier(3)).build())
                .setLocalNodeDescriptors(lnd)
                .setRemoteNodeDescriptors(rnd).build()).build());

        final Set<InstanceIdentifier<?>> removed = new HashSet<>();
        removed.add(iid);

        Mockito.doReturn(created).when(this.change).getCreatedData();
        Mockito.doReturn(updated).when(this.change).getUpdatedData();
        Mockito.doReturn(Collections.EMPTY_SET).when(this.change).getRemovedPaths();
        this.peer.onDataChanged(this.change);
        assertEquals(2, this.routes.size());

        Mockito.doReturn(Collections.EMPTY_MAP).when(this.change).getCreatedData();
        Mockito.doReturn(Collections.EMPTY_MAP).when(this.change).getUpdatedData();
        Mockito.doReturn(removed).when(this.change).getRemovedPaths();
        this.peer.onDataChanged(this.change);
        assertEquals(1, this.routes.size());
    }

    @Test
    public void testClose() {
        final AdjRIBsIn<Ipv4Prefix, Ipv4Route> a4 = this.r.getTable(this.tk);
        assertNotNull(a4);
        this.peer.close();
    }
}