package org.onlab.onos.store.impl;

import com.hazelcast.config.Config;
import com.hazelcast.config.FileSystemXmlConfig;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;

import de.javakaffee.kryoserializers.URISerializer;

import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Service;
import org.onlab.onos.cluster.ControllerNode;
import org.onlab.onos.cluster.DefaultControllerNode;
import org.onlab.onos.cluster.NodeId;
import org.onlab.onos.net.ConnectPoint;
import org.onlab.onos.net.DefaultDevice;
import org.onlab.onos.net.DefaultLink;
import org.onlab.onos.net.DefaultPort;
import org.onlab.onos.net.Device;
import org.onlab.onos.net.DeviceId;
import org.onlab.onos.net.Element;
import org.onlab.onos.net.Link;
import org.onlab.onos.net.LinkKey;
import org.onlab.onos.net.MastershipRole;
import org.onlab.onos.net.Port;
import org.onlab.onos.net.PortNumber;
import org.onlab.onos.net.provider.ProviderId;
import org.onlab.onos.store.common.StoreService;
import org.onlab.onos.store.serializers.ConnectPointSerializer;
import org.onlab.onos.store.serializers.DefaultLinkSerializer;
import org.onlab.onos.store.serializers.DefaultPortSerializer;
import org.onlab.onos.store.serializers.DeviceIdSerializer;
import org.onlab.onos.store.serializers.IpPrefixSerializer;
import org.onlab.onos.store.serializers.LinkKeySerializer;
import org.onlab.onos.store.serializers.NodeIdSerializer;
import org.onlab.onos.store.serializers.OnosTimestampSerializer;
import org.onlab.onos.store.serializers.PortNumberSerializer;
import org.onlab.onos.store.serializers.ProviderIdSerializer;
import org.onlab.packet.IpPrefix;
import org.onlab.util.KryoPool;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;

/**
 * Auxiliary bootstrap of distributed store.
 */
@Component(immediate = true)
@Service
public class StoreManager implements StoreService {

    protected static final String HAZELCAST_XML_FILE = "etc/hazelcast.xml";

    private final Logger log = LoggerFactory.getLogger(getClass());

    protected HazelcastInstance instance;
    private KryoPool serializerPool;


    @Activate
    public void activate() {
        try {
            Config config = new FileSystemXmlConfig(HAZELCAST_XML_FILE);
            instance = Hazelcast.newHazelcastInstance(config);
            setupKryoPool();
            log.info("Started");
        } catch (FileNotFoundException e) {
            log.error("Unable to configure Hazelcast", e);
        }
    }

    /**
     * Sets up the common serialzers pool.
     */
    protected void setupKryoPool() {
        // FIXME Slice out types used in common to separate pool/namespace.
        serializerPool = KryoPool.newBuilder()
                .register(ArrayList.class,
                          HashMap.class,

                          ControllerNode.State.class,
                          Device.Type.class,

                          DefaultControllerNode.class,
                          DefaultDevice.class,
                          MastershipRole.class,
                          Port.class,
                          Element.class,

                          Link.Type.class
                )
                .register(IpPrefix.class, new IpPrefixSerializer())
                .register(URI.class, new URISerializer())
                .register(NodeId.class, new NodeIdSerializer())
                .register(ProviderId.class, new ProviderIdSerializer())
                .register(DeviceId.class, new DeviceIdSerializer())
                .register(PortNumber.class, new PortNumberSerializer())
                .register(DefaultPort.class, new DefaultPortSerializer())
                .register(OnosTimestamp.class, new OnosTimestampSerializer())
                .register(LinkKey.class, new LinkKeySerializer())
                .register(ConnectPoint.class, new ConnectPointSerializer())
                .register(DefaultLink.class, new DefaultLinkSerializer())
                .build()
                .populate(10);
    }

    @Deactivate
    public void deactivate() {
        instance.shutdown();
        log.info("Stopped");
    }

    @Override
    public HazelcastInstance getHazelcastInstance() {
        return instance;
    }


    @Override
    public byte[] serialize(final Object obj) {
        return serializerPool.serialize(obj);
    }

    @Override
    public <T> T deserialize(final byte[] bytes) {
        if (bytes == null) {
            return null;
        }
        return serializerPool.deserialize(bytes);
    }

}