package org.opendaylight.lispflowmapping.implementation.serializer.address;

import java.nio.ByteBuffer;

import org.opendaylight.lispflowmapping.implementation.util.ByteUtil;
import org.opendaylight.lispflowmapping.implementation.util.LispAFIConvertor;
import org.opendaylight.lispflowmapping.implementation.util.NumberUtil;
import org.opendaylight.lispflowmapping.type.AddressFamilyNumberEnum;
import org.opendaylight.lispflowmapping.type.LispCanonicalAddressFormatEnum;
import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LcafApplicationDataAddress;
import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispAFIAddress;
import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lcafapplicationdataaddress.AddressBuilder;
import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lispaddress.lispaddresscontainer.address.LcafApplicationDataBuilder;
import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lispsimpleaddress.PrimitiveAddress;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.PortNumber;

public class LispApplicationDataLCAFAddressSerializer extends LispLCAFAddressSerializer {

    private static final LispApplicationDataLCAFAddressSerializer INSTANCE = new LispApplicationDataLCAFAddressSerializer();

    // Private constructor prevents instantiation from other classes
    private LispApplicationDataLCAFAddressSerializer() {
    }

    public static LispApplicationDataLCAFAddressSerializer getInstance() {
        return INSTANCE;
    }

    @Override
    protected short getLcafLength(LispAFIAddress lispAddress) {
        return (short) (Length.ALL_FIELDS + LispAddressSerializer.getInstance().getAddressSize(
                (LispAFIAddress) ((LcafApplicationDataAddress) lispAddress).getAddress().getPrimitiveAddress()));
    }

    @Override
    protected void serializeData(ByteBuffer buffer, LispAFIAddress lispAddress) {
        LcafApplicationDataAddress applicationDataAddress = ((LcafApplicationDataAddress) lispAddress);
        buffer.put(ByteUtil.partialIntToByteArray(applicationDataAddress.getIpTos(), Length.TOC));
        buffer.put(NumberUtil.asByte(applicationDataAddress.getProtocol().byteValue()));
        buffer.putShort(applicationDataAddress.getLocalPort().getValue().shortValue());
        buffer.putShort(applicationDataAddress.getRemotePort().getValue().shortValue());
        LispAddressSerializer.getInstance().serialize(buffer,
                (LispAFIAddress) ((LcafApplicationDataAddress) lispAddress).getAddress().getPrimitiveAddress());
    }

    @Override
    protected LcafApplicationDataAddress deserializeData(ByteBuffer buffer, byte res2, short length) {

        LcafApplicationDataBuilder builder = new LcafApplicationDataBuilder();
        byte[] rawIPTos = new byte[3];
        buffer.get(rawIPTos);
        builder.setIpTos(ByteUtil.getPartialInt(rawIPTos));
        builder.setProtocol((short) buffer.get());
        builder.setLocalPort(new PortNumber(new Integer(buffer.getShort())));
        builder.setRemotePort(new PortNumber(new Integer(buffer.getShort())));
        LispAFIAddress address = LispAddressSerializer.getInstance().deserialize(buffer);
        builder.setAfi(AddressFamilyNumberEnum.LCAF.getIanaCode()).setLcafType((short) LispCanonicalAddressFormatEnum.APPLICATION_DATA.getLispCode())
                .setAddress(new AddressBuilder().setPrimitiveAddress((PrimitiveAddress) LispAFIConvertor.toPrimitive(address)).build());

        return builder.build();
    }

    private interface Length {
        int LOCAL_PORT = 2;
        int REMOTE_PORT = 2;
        int TOC = 3;
        int PROTOCOL = 1;
        int ALL_FIELDS = LOCAL_PORT + REMOTE_PORT + TOC + PROTOCOL;
    }

}