package luan.lib;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import luan.Luan;
import luan.LuanState;
import luan.LuanException;
import luan.LuanTable;
import luan.LuanJavaFunction;


public final class PickleClient {

	private final PickleCon con;

	PickleClient(LuanState luan,DataInputStream in,DataOutputStream out) {
		con = new PickleCon(luan,in,out);
	}

	public Object call(Object... args) throws LuanException, IOException {
		con.write(args);
		Object[] result = Luan.array(con.read());
		boolean ok = (boolean)result[0];
		if( ok ) {
			Object[] rtn = new Object[result.length-1];
			System.arraycopy(result,1,rtn,0,rtn.length);
			return rtn;
		} else {
			String msg = (String)result[1];
			String src = (String)result[2];
			throw con.luan.exception(
				msg + "\n"
				+ "in:\n"
				+ "------------------\n"
				+ src + "\n"
				+ "------------------\n"
			);
		}
	}

	LuanTable table() {
		LuanTable tbl = new LuanTable();
		try {
			tbl.put( "pickle", new LuanJavaFunction(
				PickleCon.class.getMethod( "pickle", Object.class ), con
			) );
			tbl.put( "call", new LuanJavaFunction(
				PickleClient.class.getMethod( "call", new Object[0].getClass() ), this
			) );
			tbl.put( "close", new LuanJavaFunction(
				PickleCon.class.getMethod( "close" ), con
			) );
		} catch(NoSuchMethodException e) {
			throw new RuntimeException(e);
		}
		return tbl;
	}

}