/*
 * 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.translate.v3po.interfaces;

import static io.fd.honeycomb.translate.v3po.test.ContextTestUtils.getMapping;
import static io.fd.honeycomb.translate.v3po.test.ContextTestUtils.getMappingIid;
import static junit.framework.TestCase.assertTrue;
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 com.google.common.collect.Lists;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.v3po.test.TestHelperUtils;
import io.fd.honeycomb.translate.v3po.util.NamingContext;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import java.util.List;
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.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.Mappings;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.MappingsBuilder;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.mappings.Mapping;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.mappings.MappingKey;
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.InterfaceKey;
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.acl.base.attributes.L2Acl;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.acl.base.attributes.L2AclBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Acl;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.AclBuilder;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
import org.openvpp.jvpp.VppBaseCallException;
import org.openvpp.jvpp.dto.InputAclSetInterface;
import org.openvpp.jvpp.dto.InputAclSetInterfaceReply;
import org.openvpp.jvpp.dto.L2InterfaceVlanTagRewriteReply;
import org.openvpp.jvpp.future.FutureJVpp;

public class AclCustomizerTest {

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

    private NamingContext interfaceContext;
    private NamingContext classifyTableContext;
    private AclCustomizer customizer;

    private static final String IFC_TEST_INSTANCE = "ifc-test-instance";
    private static final String CT_TEST_INSTANCE = "ct-test-instance";
    private static final String IF_NAME = "local0";
    private static final int IF_INDEX = 1;

    private static final int ACL_TABLE_INDEX = 0;
    private static final String ACL_TABLE_NAME = "table0";

    @Before
    public void setUp() throws Exception {
        initMocks(this);
        interfaceContext = new NamingContext("generatedInterfaceName", IFC_TEST_INSTANCE);
        classifyTableContext = new NamingContext("generatedClassifyTable", CT_TEST_INSTANCE);
        doReturn(mappingContext).when(writeContext).getMappingContext();
        customizer = new AclCustomizer(api, interfaceContext, classifyTableContext);

        final KeyedInstanceIdentifier<Mapping, MappingKey> ifcMappingKey = getMappingIid(IF_NAME, IFC_TEST_INSTANCE);
        final Optional<Mapping> ifcMapping = getMapping(IF_NAME, IF_INDEX);
        doReturn(ifcMapping).when(mappingContext).read(ifcMappingKey);

        final KeyedInstanceIdentifier<Mapping, MappingKey> ctMappingKey =
            getMappingIid(ACL_TABLE_NAME, CT_TEST_INSTANCE);
        final Optional<Mapping> ctMapping = getMapping(ACL_TABLE_NAME, ACL_TABLE_INDEX);
        doReturn(ctMapping).when(mappingContext).read(ctMappingKey);

        final List<Mapping> allCtMappings = Lists.newArrayList(ctMapping.get());
        final Mappings allCtMappingsBaObject = new MappingsBuilder().setMapping(allCtMappings).build();
        doReturn(Optional.of(allCtMappingsBaObject)).when(mappingContext)
            .read(ctMappingKey.firstIdentifierOf(Mappings.class));
    }


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

    private Acl generateAcl(final String tableName) {
        final AclBuilder builder = new AclBuilder();
        final L2Acl l2Acl = new L2AclBuilder().setClassifyTable(tableName).build();
        builder.setL2Acl(l2Acl);
        return builder.build();
    }

    private void whenInputAclSetInterfaceThenSuccess() throws ExecutionException, InterruptedException {
        final CompletableFuture<InputAclSetInterfaceReply> replyFuture = new CompletableFuture<>();
        final InputAclSetInterfaceReply reply = new InputAclSetInterfaceReply();
        replyFuture.complete(reply);
        doReturn(replyFuture).when(api).inputAclSetInterface(any(InputAclSetInterface.class));
    }

    private void whenInputAclSetInterfaceThenFailure() throws ExecutionException, InterruptedException {
        doReturn(TestHelperUtils.<L2InterfaceVlanTagRewriteReply>createFutureException()).when(api)
            .inputAclSetInterface(any(InputAclSetInterface.class));
    }

    private void verifyInputAclSetInterfaceWasInvoked(final InputAclSetInterface expected) {
        final ArgumentCaptor<InputAclSetInterface> argumentCaptor = ArgumentCaptor.forClass(InputAclSetInterface.class);
        verify(api).inputAclSetInterface(argumentCaptor.capture());
        final InputAclSetInterface actual = argumentCaptor.getValue();
        assertEquals(expected.swIfIndex, actual.swIfIndex);
        assertEquals(expected.l2TableIndex, actual.l2TableIndex);
        assertEquals(expected.ip4TableIndex, actual.ip4TableIndex);
        assertEquals(expected.ip6TableIndex, actual.ip6TableIndex);
        assertEquals(expected.isAdd, actual.isAdd);
    }

    private void verifyInputAclSetInterfaceDisableWasInvoked(final InputAclSetInterface expected) {
        final ArgumentCaptor<InputAclSetInterface> argumentCaptor = ArgumentCaptor.forClass(InputAclSetInterface.class);
        verify(api).inputAclSetInterface(argumentCaptor.capture());
        final InputAclSetInterface actual = argumentCaptor.getValue();
        assertEquals(expected.swIfIndex, actual.swIfIndex);
        assertEquals(expected.l2TableIndex, actual.l2TableIndex);
        assertEquals(0, actual.isAdd);
    }

    private static InputAclSetInterface generateInputAclSetInterface(final byte isAdd, final int ifIndex,
                                                                     final int l2TableIndex) {
        final InputAclSetInterface request = new InputAclSetInterface();
        request.isAdd = isAdd;
        request.l2TableIndex = l2TableIndex;
        request.ip4TableIndex = ~0;
        request.ip6TableIndex = ~0;
        request.swIfIndex = ifIndex;
        return request;
    }

    @Test
    public void testCreate() throws Exception {
        final Acl acl = generateAcl(ACL_TABLE_NAME);
        final InstanceIdentifier<Acl> id = getAclId(IF_NAME);

        whenInputAclSetInterfaceThenSuccess();

        customizer.writeCurrentAttributes(id, acl, writeContext);

        verifyInputAclSetInterfaceWasInvoked(generateInputAclSetInterface((byte) 1, IF_INDEX, ACL_TABLE_INDEX));
    }

    @Test
    public void testCreateFailed() throws Exception {
        final Acl acl = generateAcl(ACL_TABLE_NAME);
        final InstanceIdentifier<Acl> id = getAclId(IF_NAME);

        whenInputAclSetInterfaceThenFailure();

        try {
            customizer.writeCurrentAttributes(id, acl, writeContext);
        } catch (WriteFailedException.CreateFailedException e) {
            assertTrue(e.getCause() instanceof VppBaseCallException);
            verifyInputAclSetInterfaceWasInvoked(generateInputAclSetInterface((byte) 1, IF_INDEX, ACL_TABLE_INDEX));
            return;
        }
        fail("WriteFailedException.CreateFailedException was expected");
    }

    @Test
    public void testDelete() throws Exception {
        final Acl acl = generateAcl(ACL_TABLE_NAME);
        final InstanceIdentifier<Acl> id = getAclId(IF_NAME);

        whenInputAclSetInterfaceThenSuccess();

        customizer.deleteCurrentAttributes(id, acl, writeContext);

        verifyInputAclSetInterfaceDisableWasInvoked(generateInputAclSetInterface((byte) 0, IF_INDEX, ACL_TABLE_INDEX));
    }

    @Test
    public void testDeleteFailed() throws Exception {
        final Acl acl = generateAcl(ACL_TABLE_NAME);
        final InstanceIdentifier<Acl> id = getAclId(IF_NAME);

        whenInputAclSetInterfaceThenFailure();

        try {
            customizer.deleteCurrentAttributes(id, acl, writeContext);
        } catch (WriteFailedException.DeleteFailedException e) {
            assertTrue(e.getCause() instanceof VppBaseCallException);
            verifyInputAclSetInterfaceDisableWasInvoked(
                generateInputAclSetInterface((byte) 0, IF_INDEX, ACL_TABLE_INDEX));
            return;
        }
        fail("WriteFailedException.DeleteFailedException was expected");
    }
}