/*
 * 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.openflowplugin.extension.vendor.nicira.convertor.match;

import java.math.BigInteger;
import java.util.Optional;
import org.opendaylight.openflowplugin.extension.api.ConvertorFromOFJava;
import org.opendaylight.openflowplugin.extension.api.ConvertorToOFJava;
import org.opendaylight.openflowplugin.extension.api.ExtensionAugment;
import org.opendaylight.openflowplugin.extension.api.path.MatchPath;
import org.opendaylight.openflowplugin.extension.vendor.nicira.convertor.CodecPreconditionException;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.Nxm1Class;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.ofj.nxm.nx.match.tun.id.grouping.TunIdValuesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.oxm.container.match.entry.value.TunIdCaseValue;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.oxm.container.match.entry.value.TunIdCaseValueBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.general.rev140714.ExtensionKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.general.rev140714.general.extension.grouping.Extension;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNodesNodeTableFlow;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNodesNodeTableFlowBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNotifPacketIn;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNotifPacketInBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNotifSwitchFlowRemoved;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNotifSwitchFlowRemovedBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchPacketInMessage;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchPacketInMessageBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchRpcGetFlowStats;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchRpcGetFlowStatsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxmNxTunIdGrouping;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxmNxTunIdKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.nxm.nx.tun.id.grouping.NxmNxTunId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.nxm.nx.tun.id.grouping.NxmNxTunIdBuilder;
import org.opendaylight.yangtools.yang.binding.Augmentation;

/**
 * Convert to/from SAL flow model to openflowjava model for TunIdCase.
 *
 * @author msunal
 */
public class TunIdConvertor implements ConvertorToOFJava<MatchEntry>, ConvertorFromOFJava<MatchEntry, MatchPath> {
    @Override
    public ExtensionAugment<? extends Augmentation<Extension>> convert(final MatchEntry input, final MatchPath path) {
        TunIdCaseValue tunnelIdCase = (TunIdCaseValue) input.getMatchEntryValue();
        return resolveAugmentation(new NxmNxTunIdBuilder().setValue(tunnelIdCase.getTunIdValues().getValue()).build(),
                path, NxmNxTunIdKey.class);
    }

    @Override
    public MatchEntry convert(final Extension extension) {
        Optional<NxmNxTunIdGrouping> matchGrouping = MatchUtil.TUN_ID_RESOLVER.findExtension(extension);
        if (!matchGrouping.isPresent()) {
            throw new CodecPreconditionException(extension);
        }
        BigInteger value = matchGrouping.get().getNxmNxTunId().getValue();

        TunIdCaseValueBuilder tunnelIdCaseBuilder = new TunIdCaseValueBuilder();

        TunIdValuesBuilder tunnelIdBuilder = new TunIdValuesBuilder();
        tunnelIdBuilder.setValue(value);
        tunnelIdCaseBuilder.setTunIdValues(tunnelIdBuilder.build());

        return MatchUtil.createDefaultMatchEntryBuilder(
                org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxTunId.class,
                Nxm1Class.class, tunnelIdCaseBuilder.build()).build();

    }

    private static ExtensionAugment<? extends Augmentation<Extension>> resolveAugmentation(final NxmNxTunId value,
            final MatchPath path, final Class<? extends ExtensionKey> key) {
        switch (path) {
            case FLOWS_STATISTICS_UPDATE_MATCH:
                return new ExtensionAugment<>(NxAugMatchNodesNodeTableFlow.class,
                        new NxAugMatchNodesNodeTableFlowBuilder().setNxmNxTunId(value).build(), key);
            case FLOWS_STATISTICS_RPC_MATCH:
                return new ExtensionAugment<>(NxAugMatchRpcGetFlowStats.class,
                        new NxAugMatchRpcGetFlowStatsBuilder().setNxmNxTunId(value).build(), key);
            case PACKET_RECEIVED_MATCH:
                return new ExtensionAugment<>(NxAugMatchNotifPacketIn.class, new NxAugMatchNotifPacketInBuilder()
                        .setNxmNxTunId(value).build(), key);
            case SWITCH_FLOW_REMOVED_MATCH:
                return new ExtensionAugment<>(NxAugMatchNotifSwitchFlowRemoved.class,
                        new NxAugMatchNotifSwitchFlowRemovedBuilder().setNxmNxTunId(value).build(), key);
            case PACKET_IN_MESSAGE_MATCH:
                return new ExtensionAugment<>(NxAugMatchPacketInMessage.class,
                        new NxAugMatchPacketInMessageBuilder().setNxmNxTunId(value).build(), key);
            default:
                throw new CodecPreconditionException(path);
        }
    }
}