/*
 * Copyright (c) 2013 Cisco Systems, 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.openflow.md.core.sal.convertor.flow;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
import org.opendaylight.openflowplugin.api.OFConstants;
import org.opendaylight.openflowplugin.openflow.md.core.sal.convertor.common.ConvertorKey;
import org.opendaylight.openflowplugin.openflow.md.core.sal.convertor.common.ResultInjector;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowModFlags;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowModFlagsV10;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowModInputBuilder;

public class FlowFlagsInjector {
    @SuppressWarnings("unchecked")
    public static <FROM, TO> void inject(Optional<FROM> source, TO target, short version) {
        FROM sourceResult;
        if (source.isPresent()) {
            sourceResult = source.get();
        } else if (version == EncodeConstants.OF10_VERSION_ID) {
            sourceResult = (FROM) FlowFlagsV10Convertor.defaultResult();
        } else {
            sourceResult = (FROM) FlowFlagsConvertor.defaultResult();
        }

        final Map<ConvertorKey, ResultInjector<?, ?>> injectorMap = new HashMap<>();
        addInjectors(injectorMap);

        final ResultInjector<FROM, TO> injection = (ResultInjector<FROM, TO>) injectorMap
                .get(new ConvertorKey(version, target.getClass()));

        injection.inject(sourceResult, target);
    }

    private static void addInjectors(final Map<ConvertorKey, ResultInjector<?, ?>> injectionMapping) {
        // OF-1.3|FlowModFlags --> FlowModInputBuilder
        injectionMapping.put(new ConvertorKey(OFConstants.OFP_VERSION_1_3, FlowModInputBuilder.class),
                new ResultInjector<FlowModFlags, FlowModInputBuilder>() {
                    @Override
                    public void inject(final FlowModFlags value,
                                       final FlowModInputBuilder target) {
                        target.setFlags(value);
                    }
                });

        // OF-1.3|FlowModFlagsV10 --> FlowModInputBuilder
        injectionMapping.put(new ConvertorKey(OFConstants.OFP_VERSION_1_0, FlowModInputBuilder.class),
                new ResultInjector<FlowModFlagsV10, FlowModInputBuilder>() {
                    @Override
                    public void inject(final FlowModFlagsV10 value,
                                       final FlowModInputBuilder target) {
                        target.setFlagsV10(value);
                    }
                });
    }
}