/*
 * Copyright (c) 2016 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.honeycomb.v3po.translate.v3po.interfaces;

import static io.fd.honeycomb.v3po.translate.v3po.ContextTestUtils.getMapping;
import static io.fd.honeycomb.v3po.translate.v3po.ContextTestUtils.getMappingIid;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.verify;
import static org.mockito.MockitoAnnotations.initMocks;

import com.google.common.base.Optional;
import io.fd.honeycomb.v3po.translate.MappingContext;
import io.fd.honeycomb.v3po.translate.v3po.util.NamingContext;
import io.fd.honeycomb.v3po.translate.v3po.util.VppApiInvocationException;
import io.fd.honeycomb.v3po.translate.write.WriteContext;
import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import org.junit.Before;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Mock;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.InterfaceBuilder;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.InterfaceKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.SubInterface;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.TagRewriteOperation;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VlanTag;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VlanType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.L2;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.l2.VlanTagRewrite;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.l2.VlanTagRewriteBuilder;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.openvpp.jvpp.dto.L2InterfaceVlanTagRewrite;
import org.openvpp.jvpp.dto.L2InterfaceVlanTagRewriteReply;
import org.openvpp.jvpp.future.FutureJVpp;

public class VlanTagRewriteCustomizerTest {

    @Mock
    private FutureJVpp api;
    @Mock
    private WriteContext writeContext;
    @Mock
    private MappingContext mappingContext;

    private NamingContext namingContext;
    private VlanTagRewriteCustomizer customizer;

    public static final String VLAN_IF_NAME = "local0.0";
    public static final int VLAN_IF_ID = 1;

    @Before
    public void setUp() throws Exception {
        initMocks(this);
        namingContext = new NamingContext("generatedSubInterfaceName", "test-instance");
        doReturn(mappingContext).when(writeContext).getMappingContext();
        customizer = new VlanTagRewriteCustomizer(api, namingContext);
        doReturn(getMapping(VLAN_IF_NAME, VLAN_IF_ID)).when(mappingContext).read(getMappingIid(VLAN_IF_NAME, "test-instance"));
    }

    private InstanceIdentifier<VlanTagRewrite> getVlanTagRewriteId(final String name) {
        return InstanceIdentifier.create(Interfaces.class).child(Interface.class, new InterfaceKey(name)).augmentation(
                VppInterfaceAugmentation.class).child(L2.class).child(VlanTagRewrite.class);
    }

    private VlanTagRewrite generateVlanTagRewrite(final int vtrOp) {
        final VlanTagRewriteBuilder builder = new VlanTagRewriteBuilder();
        builder.setRewriteOperation(TagRewriteOperation.forValue(vtrOp));
        builder.setTag1(new VlanTag(100));
        builder.setTag2(new VlanTag(200));
        builder.setFirstPushed(VlanType._802dot1ad);
        return builder.build();
    }

    private L2InterfaceVlanTagRewrite generateL2InterfaceVlanTagRewrite(final int superIfId, final int vtrOp) {
        final L2InterfaceVlanTagRewrite request = new L2InterfaceVlanTagRewrite();
        request.swIfIndex = superIfId;
        request.vtrOp = vtrOp;
        request.pushDot1Q = 0;
        request.tag1 = 100;
        request.tag2 = 200;
        return request;
    }

    private void whenL2InterfaceVlanTagRewriteThen(final int retval) throws ExecutionException, InterruptedException {
        final CompletableFuture<L2InterfaceVlanTagRewriteReply> replyFuture = new CompletableFuture<>();
        final L2InterfaceVlanTagRewriteReply reply = new L2InterfaceVlanTagRewriteReply();
        reply.retval = retval;
        replyFuture.complete(reply);
        doReturn(replyFuture).when(api).l2InterfaceVlanTagRewrite(any(L2InterfaceVlanTagRewrite.class));
    }

    private void whenL2InterfaceVlanTagRewriteThenSuccess() throws ExecutionException, InterruptedException {
        whenL2InterfaceVlanTagRewriteThen(0);
    }

    private void whenL2InterfaceVlanTagRewriteThenFailure() throws ExecutionException, InterruptedException {
        whenL2InterfaceVlanTagRewriteThen(-1);
    }

    private void verifyL2InterfaceVlanTagRewriteWasInvoked(final L2InterfaceVlanTagRewrite expected) {
        ArgumentCaptor<L2InterfaceVlanTagRewrite> argumentCaptor = ArgumentCaptor.forClass(L2InterfaceVlanTagRewrite.class);
        verify(api).l2InterfaceVlanTagRewrite(argumentCaptor.capture());
        final L2InterfaceVlanTagRewrite actual = argumentCaptor.getValue();
        assertEquals(expected.swIfIndex, actual.swIfIndex);
        assertEquals(expected.vtrOp, actual.vtrOp);
        assertEquals(expected.pushDot1Q, actual.pushDot1Q);
        assertEquals(expected.tag1, actual.tag1);
        assertEquals(expected.tag2, actual.tag2);
    }

    private void verifyL2InterfaceVlanTagRewriteDeleteWasInvoked() {
        final L2InterfaceVlanTagRewrite request = new L2InterfaceVlanTagRewrite();
        request.swIfIndex = VLAN_IF_ID;
        verifyL2InterfaceVlanTagRewriteWasInvoked(request);
    }

    @Test
    public void testCreate() throws Exception {
        final int vtrOp = 6;
        final VlanTagRewrite vlanTagRewrite = generateVlanTagRewrite(vtrOp);
        final InstanceIdentifier<VlanTagRewrite> id = getVlanTagRewriteId(VLAN_IF_NAME);

        whenL2InterfaceVlanTagRewriteThenSuccess();
        // Vlan Tag rewrite is checking ifc type by reading its configuration from write context
        doReturn(Optional.of(new InterfaceBuilder().setType(SubInterface.class).build()))
            .when(writeContext).readAfter(any(InstanceIdentifier.class));

        customizer.writeCurrentAttributes(id, vlanTagRewrite, writeContext);

        verifyL2InterfaceVlanTagRewriteWasInvoked(generateL2InterfaceVlanTagRewrite(VLAN_IF_ID, vtrOp));
    }

    @Test
    public void testCreateFailed() throws Exception {
        final int vtrOp = 6;
        final VlanTagRewrite vlanTagRewrite = generateVlanTagRewrite(vtrOp);
        final InstanceIdentifier<VlanTagRewrite> id = getVlanTagRewriteId(VLAN_IF_NAME);

        whenL2InterfaceVlanTagRewriteThenFailure();
        // Vlan Tag rewrite is checking ifc type by reading its configuration from write context
        doReturn(Optional.of(new InterfaceBuilder().setType(SubInterface.class).build()))
            .when(writeContext).readAfter(any(InstanceIdentifier.class));

        try {
            customizer.writeCurrentAttributes(id, vlanTagRewrite, writeContext);
        } catch (WriteFailedException.CreateFailedException e) {
            assertEquals(VppApiInvocationException.class, e.getCause().getClass());
            verifyL2InterfaceVlanTagRewriteWasInvoked(generateL2InterfaceVlanTagRewrite(VLAN_IF_ID, vtrOp));
            return;
        }
        fail("WriteFailedException.CreateFailedException was expected");
    }

    @Test
    public void testUpdate() throws Exception {
        final int vtrOpAfter = 5;
        final VlanTagRewrite before = generateVlanTagRewrite(6);
        final VlanTagRewrite after = generateVlanTagRewrite(vtrOpAfter);
        final InstanceIdentifier<VlanTagRewrite> id = getVlanTagRewriteId(VLAN_IF_NAME);

        whenL2InterfaceVlanTagRewriteThenSuccess();

        customizer.updateCurrentAttributes(id, before, after, writeContext);

        verifyL2InterfaceVlanTagRewriteWasInvoked(generateL2InterfaceVlanTagRewrite(VLAN_IF_ID, vtrOpAfter));
    }

    @Test
    public void testUpdateFailed() throws Exception {
        final int vtrOpAfter = 5;
        final VlanTagRewrite before = generateVlanTagRewrite(6);
        final VlanTagRewrite after = generateVlanTagRewrite(vtrOpAfter);
        final InstanceIdentifier<VlanTagRewrite> id = getVlanTagRewriteId(VLAN_IF_NAME);

        whenL2InterfaceVlanTagRewriteThenFailure();

        try {
            customizer.updateCurrentAttributes(id, before, after, writeContext);
        } catch (WriteFailedException.UpdateFailedException e) {
            assertEquals(VppApiInvocationException.class, e.getCause().getClass());
            verifyL2InterfaceVlanTagRewriteWasInvoked(generateL2InterfaceVlanTagRewrite(VLAN_IF_ID, vtrOpAfter));
            return;
        }
        fail("WriteFailedException.UpdateFailedException was expected");
    }

    @Test
    public void testDelete() throws Exception {
        final VlanTagRewriteBuilder builder = new VlanTagRewriteBuilder();
        builder.setRewriteOperation(TagRewriteOperation.Disabled);
        final InstanceIdentifier<VlanTagRewrite> id = getVlanTagRewriteId(VLAN_IF_NAME);

        whenL2InterfaceVlanTagRewriteThenSuccess();

        customizer.deleteCurrentAttributes(id, builder.build(), writeContext);

        verifyL2InterfaceVlanTagRewriteDeleteWasInvoked();
    }

    @Test
    public void testDeleteFailed() throws Exception {
        final VlanTagRewriteBuilder builder = new VlanTagRewriteBuilder();
        builder.setRewriteOperation(TagRewriteOperation.Disabled);
        final InstanceIdentifier<VlanTagRewrite> id = getVlanTagRewriteId(VLAN_IF_NAME);

        whenL2InterfaceVlanTagRewriteThenFailure();

        try {
            customizer.deleteCurrentAttributes(id, builder.build(), writeContext);
        } catch (WriteFailedException.DeleteFailedException e) {
            assertEquals(VppApiInvocationException.class, e.getCause().getClass());
            verifyL2InterfaceVlanTagRewriteDeleteWasInvoked();
            return;
        }
        fail("WriteFailedException.DeleteFailedException was expected");
    }
}