/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.fd.hc2vpp.nat.read;

import static io.fd.hc2vpp.nat.NatIds.NAT_INSTANCES_ID;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.collection.IsEmptyCollection.empty;
import static org.hamcrest.core.IsCollectionContaining.hasItems;
import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.when;
import static org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.nat.rev180510.NatPoolType.Nat44;
import static org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.nat.rev180510.NatPoolType.Nat64;

import io.fd.hc2vpp.common.test.read.ListReaderCustomizerTest;
import io.fd.honeycomb.translate.spi.read.ReaderCustomizer;
import io.fd.jvpp.nat.dto.Nat44AddressDetails;
import io.fd.jvpp.nat.dto.Nat44AddressDetailsReplyDump;
import io.fd.jvpp.nat.dto.Nat64PoolAddrDetails;
import io.fd.jvpp.nat.dto.Nat64PoolAddrDetailsReplyDump;
import io.fd.jvpp.nat.future.FutureJVppNatFacade;
import io.fd.jvpp.nat.types.Ip4Address;
import java.util.Arrays;
import java.util.List;
import java.util.stream.LongStream;
import org.junit.Test;
import org.mockito.Mock;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.nat.rev180510.ExternalIpAddressPoolAugmentation;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.Instance;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.InstanceKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.Policy;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.PolicyBuilder;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.PolicyKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.policy.ExternalIpAddressPool;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.policy.ExternalIpAddressPoolBuilder;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev180628.nat.instances.instance.policy.ExternalIpAddressPoolKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;

public class ExternalIpPoolCustomizerTest
    extends ListReaderCustomizerTest<ExternalIpAddressPool, ExternalIpAddressPoolKey, ExternalIpAddressPoolBuilder> {

    private static final InstanceIdentifier<Policy> POLICY_ID =
        NAT_INSTANCES_ID.child(Instance.class, new InstanceKey(NatInstanceCustomizer.DEFAULT_VRF_ID))
                    .child(Policy.class, new PolicyKey(0L));

    private static final InstanceIdentifier<ExternalIpAddressPool> NAT_DEFAULT_POOL_WILDCARDED_ID =
        POLICY_ID.child(ExternalIpAddressPool.class);

    private static final InstanceIdentifier<ExternalIpAddressPool> NAT_NON_DEFAULT_POOL_WILDCARDED_ID =
        NAT_INSTANCES_ID.child(Instance.class, new InstanceKey(7L))
                    .child(Policy.class).child(ExternalIpAddressPool.class);

    @Mock
    private FutureJVppNatFacade jvppNat;

    public ExternalIpPoolCustomizerTest() {
        super(ExternalIpAddressPool.class, PolicyBuilder.class);
    }

    @Override
    protected ReaderCustomizer<ExternalIpAddressPool, ExternalIpAddressPoolBuilder> initCustomizer() {
        return new ExternalIpPoolCustomizer(jvppNat);
    }

    @Test
    public void testReadAttributesNat44() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44NonEmpty()));
        final long poolId = 2;
        final ExternalIpAddressPoolBuilder builder = new ExternalIpAddressPoolBuilder();
        getCustomizer().readCurrentAttributes(getId(poolId), builder, ctx);

        assertEquals("192.168.44.3/32", builder.getExternalIpPool().getValue());
        assertEquals(poolId, builder.getPoolId().longValue());
        assertEquals(Nat44, builder.augmentation(ExternalIpAddressPoolAugmentation.class).getPoolType());
    }

    @Test
    public void testReadAttributesNat64() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44Empty()));
        when(jvppNat.nat64PoolAddrDump(any())).thenReturn(future(dumpReplyNat64NonEmpty()));
        final long poolId = 2;

        final ExternalIpAddressPoolBuilder builder = new ExternalIpAddressPoolBuilder();
        getCustomizer().readCurrentAttributes(getId(poolId), builder, ctx);

        assertEquals("192.168.64.3/32", builder.getExternalIpPool().getValue());
        assertEquals(poolId, builder.getPoolId().longValue());
        assertEquals(Nat64, builder.augmentation(ExternalIpAddressPoolAugmentation.class).getPoolType());
    }

    @Test
    public void testReadAttributes() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44NonEmpty()));
        when(jvppNat.nat64PoolAddrDump(any())).thenReturn(future(dumpReplyNat64NonEmpty()));
        final long poolId = 5;

        final ExternalIpAddressPoolBuilder builder = new ExternalIpAddressPoolBuilder();
        getCustomizer().readCurrentAttributes(getId(poolId), builder, ctx);

        assertEquals("192.168.64.3/32", builder.getExternalIpPool().getValue());
        assertEquals(poolId, builder.getPoolId().longValue());
        assertEquals(Nat64, builder.augmentation(ExternalIpAddressPoolAugmentation.class).getPoolType());
    }

    @Test
    public void testGetAllNat44() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44NonEmpty()));
        when(jvppNat.nat64PoolAddrDump(any())).thenReturn(future(dumpReplyNat64Empty()));

        final List<ExternalIpAddressPoolKey> allIds = getCustomizer().getAllIds(NAT_DEFAULT_POOL_WILDCARDED_ID, ctx);
        assertThat(allIds, hasItems(
                LongStream.range(0, 2).mapToObj(ExternalIpAddressPoolKey::new)
                        .toArray(ExternalIpAddressPoolKey[]::new)));
    }

    @Test
    public void testGetAllNat64() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44Empty()));
        when(jvppNat.nat64PoolAddrDump(any())).thenReturn(future(dumpReplyNat64NonEmpty()));

        final List<ExternalIpAddressPoolKey> allIds = getCustomizer().getAllIds(NAT_DEFAULT_POOL_WILDCARDED_ID, ctx);
        assertThat(allIds, hasItems(
                LongStream.range(0, 2).mapToObj(ExternalIpAddressPoolKey::new)
                        .toArray(ExternalIpAddressPoolKey[]::new)));
    }

    @Test
    public void testGetAll() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44NonEmpty()));
        when(jvppNat.nat64PoolAddrDump(any())).thenReturn(future(dumpReplyNat64NonEmpty()));

        final List<ExternalIpAddressPoolKey> allIds = getCustomizer().getAllIds(NAT_DEFAULT_POOL_WILDCARDED_ID, ctx);
        assertThat(allIds, hasItems(
                LongStream.range(0, 5).mapToObj(ExternalIpAddressPoolKey::new)
                        .toArray(ExternalIpAddressPoolKey[]::new)));
    }

    @Test
    public void testGetAllDifferentInstance() throws Exception {
        assertThat(getCustomizer().getAllIds(NAT_NON_DEFAULT_POOL_WILDCARDED_ID, ctx), empty());
    }

    @Test
    public void testGetAllNoDump() throws Exception {
        when(jvppNat.nat44AddressDump(any())).thenReturn(future(dumpReplyNat44Empty()));
        when(jvppNat.nat64PoolAddrDump(any())).thenReturn(future(dumpReplyNat64Empty()));
        assertThat(getCustomizer().getAllIds(NAT_DEFAULT_POOL_WILDCARDED_ID, ctx), empty());
    }

    private static InstanceIdentifier<ExternalIpAddressPool> getId(final long id) {
        return POLICY_ID.child(ExternalIpAddressPool.class, new ExternalIpAddressPoolKey(id));
    }

    private static Nat44AddressDetailsReplyDump dumpReplyNat44Empty() {
        return new Nat44AddressDetailsReplyDump();
    }

    private static Nat44AddressDetailsReplyDump dumpReplyNat44NonEmpty() {
        Nat44AddressDetailsReplyDump replyDump = dumpReplyNat44Empty();

        Nat44AddressDetails detailsOne = new Nat44AddressDetails();
        detailsOne.ipAddress = new Ip4Address();
        detailsOne.ipAddress.ip4Address = new byte[]{-64, -88, 44, 1};

        Nat44AddressDetails detailsTwo = new Nat44AddressDetails();
        detailsTwo.ipAddress = new Ip4Address();
        detailsTwo.ipAddress.ip4Address = new byte[]{-64, -88, 44, 2};

        Nat44AddressDetails detailsThree = new Nat44AddressDetails();
        detailsThree.ipAddress = new Ip4Address();
        detailsThree.ipAddress.ip4Address = new byte[]{-64, -88, 44, 3};

        replyDump.nat44AddressDetails = Arrays.asList(detailsOne, detailsTwo, detailsThree);

        return replyDump;
    }

    private static Nat64PoolAddrDetailsReplyDump dumpReplyNat64Empty() {
        return new Nat64PoolAddrDetailsReplyDump();
    }

    private static Nat64PoolAddrDetailsReplyDump dumpReplyNat64NonEmpty() {
        Nat64PoolAddrDetailsReplyDump replyDump = dumpReplyNat64Empty();

        Nat64PoolAddrDetails detailsOne = new Nat64PoolAddrDetails();
        detailsOne.address = new Ip4Address();
        detailsOne.address.ip4Address = new byte[]{-64, -88, 64, 1};

        Nat64PoolAddrDetails detailsTwo = new Nat64PoolAddrDetails();
        detailsTwo.address = new Ip4Address();
        detailsTwo.address.ip4Address = new byte[]{-64, -88, 64, 2};

        Nat64PoolAddrDetails detailsThree = new Nat64PoolAddrDetails();
        detailsThree.address = new Ip4Address();
        detailsThree.address.ip4Address = new byte[]{-64, -88, 64, 3};

        replyDump.nat64PoolAddrDetails = Arrays.asList(detailsOne, detailsTwo, detailsThree);

        return replyDump;
    }
}