package mage.remote.traffic;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

/**
 * Implementation for compressing and decompressing objects using {@link GZIPInputStream} and {@link GZIPOutputStream}.
 * Can be used to send any {@link Object} over internet to reduce traffic usage.
 *
 * @author ayrat
 */
public class ZippedObjectImpl<T> implements ZippedObject<T>, Serializable {

    private byte[] data;

    public ZippedObjectImpl(T object) {
        zip(object);
    }

    public void zip(T object) {
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            GZIPOutputStream gz = new GZIPOutputStream(bos);
            ObjectOutputStream oos = new ObjectOutputStream(gz);
            oos.writeObject(object);
            oos.close();
            data = bos.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("unchecked")
    public T unzip() {
        try {
            ByteArrayInputStream bis = new ByteArrayInputStream(data);
            GZIPInputStream gz = new GZIPInputStream(bis);
            ObjectInputStream ois = new ObjectInputStream(gz);
            Object o = ois.readObject();
            return (T)o;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    private static final long serialVersionUID = 1L;
}