/*
 * Copyright (c) 2015 Intel, 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.util.Optional;
import org.opendaylight.openflowjava.nx.api.NiciraConstants;
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.augments.rev150225.oxm.container.match.entry.value.ExperimenterIdCase;
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.OfjAugNxExpMatch;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.ofj.nxm.nx.match.nsh.np.grouping.NshNpValues;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.ofj.nxm.nx.match.nsh.np.grouping.NshNpValuesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.oxm.container.match.entry.value.experimenter.id._case.NxExpMatchEntryValue;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.oxm.container.match.entry.value.experimenter.id._case.nx.exp.match.entry.value.NshNpCaseValue;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.oxm.container.match.entry.value.experimenter.id._case.nx.exp.match.entry.value.NshNpCaseValueBuilder;
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.NxmNxNshNpGrouping;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxmNxNshNpKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.nxm.nx.nsh.np.grouping.NxmNxNshNp;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.nxm.nx.nsh.np.grouping.NxmNxNshNpBuilder;
import org.opendaylight.yangtools.yang.binding.Augmentation;
import org.opendaylight.yangtools.yang.common.Uint8;

public class NshNpConvertor implements ConvertorToOFJava<MatchEntry>, ConvertorFromOFJava<MatchEntry, MatchPath> {

    @Override
    public ExtensionAugment<? extends Augmentation<Extension>> convert(MatchEntry input, MatchPath path) {
        ExperimenterIdCase experimenterIdCase = (ExperimenterIdCase) input.getMatchEntryValue();
        OfjAugNxExpMatch ofjAugNxExpMatch = experimenterIdCase.augmentation(OfjAugNxExpMatch.class);
        NshNpCaseValue nshNpCaseValue = (NshNpCaseValue) ofjAugNxExpMatch.getNxExpMatchEntryValue();
        NshNpValues nshNpValues = nshNpCaseValue.getNshNpValues();
        NxmNxNshNp nxmNxNshNp = new NxmNxNshNpBuilder()
                .setValue(nshNpValues.getValue())
                .build();
        return resolveAugmentation(
                nxmNxNshNp,
                path,
                NxmNxNshNpKey.class);
    }

    @Override
    public MatchEntry convert(Extension extension) {
        Optional<NxmNxNshNpGrouping> matchGrouping = MatchUtil.NSH_NP_RESOLVER.findExtension(extension);
        if (!matchGrouping.isPresent()) {
            throw new CodecPreconditionException(extension);
        }
        Uint8 value = matchGrouping.get().getNxmNxNshNp().getValue();
        return buildMatchEntry(value, null);
    }

    public static MatchEntry buildMatchEntry(Uint8 value, Uint8 mask) {
        NshNpValues nshNpValues = new NshNpValuesBuilder().setValue(value).build();
        NxExpMatchEntryValue entryValue = new NshNpCaseValueBuilder().setNshNpValues(nshNpValues).build();
        return MatchUtil.createExperimenterMatchEntryBuilder(
                org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxNshNp.class,
                NiciraConstants.NX_NSH_VENDOR_ID,
                entryValue).setHasMask(mask != null).build();
    }

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