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// Burton Computer Corporation
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package org.javimmutable.collections.serialization;

import org.javimmutable.collections.JImmutableList;
import org.javimmutable.collections.JImmutableListMap;
import org.javimmutable.collections.JImmutableMap;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Iterator;

@SuppressWarnings("unchecked")
abstract class AbstractJImmutableListMapProxy
    implements Externalizable
{
    private static final int MAP_VERSION = 1001;
    private static final long serialVersionUID = -121805;

    protected JImmutableListMap map;

    protected AbstractJImmutableListMapProxy(JImmutableListMap map)
    {
        this.map = map;
    }

    @Override
    public void writeExternal(ObjectOutput out)
        throws IOException
    {
        out.writeInt(MAP_VERSION);
        writeMap(out);
        out.writeInt(map.size());
        final Iterator iterator = map.iterator();
        while (iterator.hasNext()) {
            final JImmutableMap.Entry entry = iterator.next();
            final JImmutableList list = (JImmutableList)entry.getValue();
            out.writeObject(entry.getKey());
            out.writeInt(list.size());
            for (Object value : list) {
                out.writeObject(value);
            }
        }
    }

    @Override
    public void readExternal(ObjectInput in)
        throws IOException, ClassNotFoundException
    {
        final int version = in.readInt();
        if (version != MAP_VERSION) {
            throw new IOException("unexpected version number: expected " + MAP_VERSION + " found " + version);
        }
        map = readMap(in);
        final int size = in.readInt();
        for (int i = 0; i < size; ++i) {
            final Object key = in.readObject();
            final int listSize = in.readInt();
            JImmutableList values = map.getList(key);
            for (int k = 0; k < listSize; ++k) {
                values = values.insertLast(in.readObject());
            }
            map = map.assign(key, values);
        }
    }

    protected Object readResolve()
    {
        return map;
    }

    protected JImmutableListMap readMap(ObjectInput in)
        throws IOException, ClassNotFoundException
    {
        return map;
    }

    protected void writeMap(ObjectOutput out)
        throws IOException
    {
    }
}