/*
 * 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.vpp.classifier.write.acl.ingress;

import static com.google.common.base.Preconditions.checkNotNull;

import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.hc2vpp.v3po.util.SubInterfaceUtils;
import io.fd.hc2vpp.vpp.classifier.context.VppClassifierContextManager;
import io.fd.honeycomb.translate.spi.write.WriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.jvpp.core.future.FutureJVppCore;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.classifier.acl.rev170503.vpp.acl.attributes.acl.Ingress;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.vlan.rev180319.interfaces._interface.sub.interfaces.SubInterface;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.vlan.rev180319.interfaces._interface.sub.interfaces.SubInterfaceKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev180220.interfaces.Interface;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev180220.interfaces.InterfaceKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Customizer for enabling/disabling ingress ACLs on given sub-interface.
 */
public class SubInterfaceAclCustomizer extends FutureJVppCustomizer
        implements WriterCustomizer<Ingress>, AclWriter {

    private static final Logger LOG = LoggerFactory.getLogger(SubInterfaceAclCustomizer.class);
    private final NamingContext interfaceContext;
    private final VppClassifierContextManager classifyTableContext;

    public SubInterfaceAclCustomizer(@Nonnull final FutureJVppCore vppApi,
                                     @Nonnull final NamingContext interfaceContext,
                                     @Nonnull final VppClassifierContextManager classifyTableContext) {
        super(vppApi);
        this.interfaceContext = checkNotNull(interfaceContext, "interfaceContext should not be null");
        this.classifyTableContext = checkNotNull(classifyTableContext, "classifyTableContext should not be null");
    }

    @Override
    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Ingress> id, @Nonnull final Ingress dataAfter,
                                       @Nonnull final WriteContext writeContext) throws WriteFailedException {
        setAcl(true, id, dataAfter, writeContext);
    }

    @Override
    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Ingress> id,
                                        @Nonnull final Ingress dataBefore,
                                        @Nonnull final Ingress dataAfter, @Nonnull final WriteContext writeContext)
            throws WriteFailedException {
        throw new UnsupportedOperationException("Acl update is not supported. Please delete Acl container first.");
    }

    @Override
    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Ingress> id,
                                        @Nonnull final Ingress dataBefore,
                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
        setAcl(false, id, dataBefore, writeContext);
    }

    private void setAcl(final boolean isAdd, @Nonnull final InstanceIdentifier<Ingress> id, @Nonnull final Ingress acl,
                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
        final InterfaceKey parentInterfacekey = id.firstKeyOf(Interface.class);
        final SubInterfaceKey subInterfacekey = id.firstKeyOf(SubInterface.class);
        final String subInterfaceName = SubInterfaceUtils
                .getSubInterfaceName(parentInterfacekey.getName(), subInterfacekey.getIdentifier().intValue());
        final int subInterfaceIndex = interfaceContext.getIndex(subInterfaceName, writeContext.getMappingContext());

        LOG.debug("Setting ACL(isAdd={}) on sub-interface={}(id={}): {}",
                isAdd, subInterfaceName, subInterfaceIndex, acl);
        inputAclSetInterface(getFutureJVpp(), isAdd, id, acl, subInterfaceIndex, classifyTableContext,
                writeContext.getMappingContext());
        LOG.debug("Successfully set ACL(isAdd={}) on sub-interface={}(id={}): {}",
                isAdd, subInterfaceName, subInterfaceIndex, acl);
    }
}