/*
 * Copyright (C) 2014 Red Hat, Inc.
 *
 * 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
 *
 * Authors : Madhu Venugopal
 */
package org.opendaylight.openflowplugin.extension.vendor.nicira.convertor.match;

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.rev130731.Nxm1Class;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.OfjAugNxMatch;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.OfjAugNxMatchBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.ofj.nxm.nx.match.nsi.grouping.NsiValues;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.ofj.nxm.nx.match.nsi.grouping.NsiValuesBuilder;
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.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.NxAugMatchNotifUpdateFlowStats;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxAugMatchNotifUpdateFlowStatsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxmNxNsiGrouping;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.NxmNxNsiKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.nxm.nx.nsi.grouping.NxmNxNsi;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.nicira.match.rev140714.nxm.nx.nsi.grouping.NxmNxNsiBuilder;
import org.opendaylight.yangtools.yang.binding.Augmentation;

import com.google.common.base.Optional;
public class NsiConvertor implements ConvertorToOFJava<MatchEntries>, ConvertorFromOFJava<MatchEntries, MatchPath> {
    @Override
    public ExtensionAugment<? extends Augmentation<Extension>> convert(MatchEntries input, MatchPath path) {
        NsiValues values = input.getAugmentation(OfjAugNxMatch.class).getNsiValues();
        return resolveAugmentation(new NxmNxNsiBuilder().setNsi(values.getNsi()).build(), path,
                NxmNxNsiKey.class);
    }

    private static ExtensionAugment<? extends Augmentation<Extension>> resolveAugmentation(NxmNxNsi value,
            MatchPath path, Class<? extends ExtensionKey> key) {
        switch (path) {
        case FLOWSSTATISTICSUPDATE_FLOWANDSTATISTICSMAPLIST_MATCH:
            return new ExtensionAugment<>(NxAugMatchNotifUpdateFlowStats.class,
                    new NxAugMatchNotifUpdateFlowStatsBuilder().setNxmNxNsi(value).build(), key);
        case PACKETRECEIVED_MATCH:
            return new ExtensionAugment<>(NxAugMatchNotifPacketIn.class, new NxAugMatchNotifPacketInBuilder()
                    .setNxmNxNsi(value).build(), key);
        case SWITCHFLOWREMOVED_MATCH:
            return new ExtensionAugment<>(NxAugMatchNotifSwitchFlowRemoved.class,
                    new NxAugMatchNotifSwitchFlowRemovedBuilder().setNxmNxNsi(value).build(), key);
        default:
            throw new CodecPreconditionException(path);
        }
    }

    @Override
    public MatchEntries convert(Extension extension) {
        Optional<NxmNxNsiGrouping> matchGrouping = MatchUtil.nsiResolver.getExtension(extension);
        if (!matchGrouping.isPresent()) {
            throw new CodecPreconditionException(extension);
        }
        Short value = matchGrouping.get().getNxmNxNsi().getNsi();
        OfjAugNxMatchBuilder augNxMatchBuilder = new OfjAugNxMatchBuilder().setNsiValues(new NsiValuesBuilder()
                .setNsi(value).build());
        return MatchUtil
                .createNiciraMatchEntries(
                        Nxm1Class.class,
                        org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxNsi.class,
                        false, augNxMatchBuilder.build());
    }

}