package org.opendaylight.openflowjava.nx.codec.match;

import io.netty.buffer.ByteBuf;
import org.opendaylight.openflowjava.protocol.api.keys.MatchEntryDeserializerKey;
import org.opendaylight.openflowjava.protocol.api.keys.MatchEntrySerializerKey;
import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
import org.opendaylight.openflowjava.protocol.api.util.OxmMatchConstants;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.MatchField;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.Nxm1Class;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.OpenflowBasicClass;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.OxmClassBase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.TunnelId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntryBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entry.value.grouping.match.entry.value.TunnelIdCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entry.value.grouping.match.entry.value.TunnelIdCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entry.value.grouping.match.entry.value.tunnel.id._case.TunnelIdBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxTunId;
import java.math.BigInteger;

public class TunIdCodec extends AbstractMatchCodec {

    private static final int VALUE_LENGTH = 8;
    private static final int NXM_FIELD_CODE = 16;
    public static final MatchEntrySerializerKey<Nxm1Class, NxmNxTunId> SERIALIZER_KEY = new MatchEntrySerializerKey<>(
            EncodeConstants.OF13_VERSION_ID, Nxm1Class.class, NxmNxTunId.class);
    public static final MatchEntryDeserializerKey DESERIALIZER_KEY = new MatchEntryDeserializerKey(
            EncodeConstants.OF13_VERSION_ID, OxmMatchConstants.NXM_1_CLASS, NXM_FIELD_CODE);

    @Override
    public void serialize(MatchEntry input, ByteBuf outBuffer) {
        serializeHeader(input, outBuffer);
        TunnelIdCase value = ((TunnelIdCase) input.getMatchEntryValue());
        outBuffer.writeBytes(value.getTunnelId().getTunnelId());
        byte[] mask = value.getTunnelId().getTunnelId();
        if (null != mask) {
            outBuffer.writeBytes(mask);
        }
    }

    @Override
    public MatchEntry deserialize(ByteBuf message) {
        MatchEntryBuilder matchEntriesBuilder = deserializeHeader(message);
        TunnelIdCaseBuilder tunnelIdCaseBuilder = new TunnelIdCaseBuilder();
        TunnelIdBuilder tunnelIdBuilder = new TunnelIdBuilder();
        tunnelIdBuilder.setTunnelId(BigInteger.valueOf(message.readLong()).toByteArray());
        tunnelIdCaseBuilder.setTunnelId(tunnelIdBuilder.build());
        matchEntriesBuilder.setOxmClass(OpenflowBasicClass.class);
        matchEntriesBuilder.setOxmMatchField(TunnelId.class);
        matchEntriesBuilder.setMatchEntryValue(tunnelIdCaseBuilder.build());
        return matchEntriesBuilder.build();
    }

    @Override
    public int getNxmFieldCode() {
        return NXM_FIELD_CODE;
    }

    @Override
    public int getOxmClassCode() {
        return OxmMatchConstants.NXM_1_CLASS;
    }

    @Override
    public int getValueLength() {
        return VALUE_LENGTH;
    }

    @Override
    public Class<? extends MatchField> getNxmField() {
        return NxmNxTunId.class;
    }

    @Override
    public Class<? extends OxmClassBase> getOxmClass() {
        return Nxm1Class.class;
    }

}