/*
 * Copyright (c) 2013 Pantheon Technologies s.r.o. 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.openflowjava.protocol.impl.deserialization.action;

import java.util.ArrayList;
import java.util.List;

import io.netty.buffer.ByteBuf;

import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistryInjector;
import org.opendaylight.openflowjava.protocol.api.extensibility.EnhancedMessageCodeKey;
import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.OxmFieldsAction;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.OxmFieldsActionBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.SetField;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.actions.grouping.Action;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.actions.grouping.ActionBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.ActionBase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries;

/**
 * @author michal.polkorab
 *
 */
public class OF13SetFieldActionDeserializer extends AbstractActionDeserializer
        implements DeserializerRegistryInjector {

    private DeserializerRegistry registry;

    @Override
    public Action deserialize(ByteBuf input) {
        ActionBuilder builder = new ActionBuilder();
        builder.setType(getType());
        int startIndex = input.readerIndex();
        input.skipBytes(2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
        OxmFieldsActionBuilder matchEntries = new OxmFieldsActionBuilder();
        int oxmClass = input.getUnsignedShort(input.readerIndex());
        // get oxm_field & hasMask byte and extract the field value
        int oxmField = input.getUnsignedByte(input.readerIndex()
                + EncodeConstants.SIZE_OF_SHORT_IN_BYTES) >>> 1;
        OFDeserializer<MatchEntries> matchDeserializer = registry.getDeserializer(
                new EnhancedMessageCodeKey(EncodeConstants.OF13_VERSION_ID, oxmClass,
                        oxmField, MatchEntries.class));
        List<MatchEntries> entry = new ArrayList<>();
        entry.add(matchDeserializer.deserialize(input));
        matchEntries.setMatchEntries(entry);
        builder.addAugmentation(OxmFieldsAction.class, matchEntries.build());
        int paddingRemainder = (input.readerIndex() - startIndex) % EncodeConstants.PADDING;
        if (paddingRemainder != 0) {
            input.skipBytes(EncodeConstants.PADDING - paddingRemainder);
        }
        return builder.build();
    }

    @Override
    protected Class<? extends ActionBase> getType() {
        return SetField.class;
    }

    @Override
    public void injectDeserializerRegistry(DeserializerRegistry deserializerRegistry) {
        this.registry = deserializerRegistry;
    }

}