// Copyright 1997, <a href=http://www.MageLang.com>MageLang Institute</a>.

import java.io.*;
import java.net.UnknownHostException;
import java.net.Socket;
import java.net.InetAddress;

public class Client {
  public static final int DEFAULT_PORT = 8002;
   protected DataInputStream in;
   protected PrintStream out;
   protected Socket client;

   public static void main(String[] args) {
    // first determine the port to use
    int port = DEFAULT_PORT;
    if (args.length > 1) {
      System.err.println("Usage: java Client [port]");
      System.exit(0);
    }
    else if (args.length == 1) {
      try { port = Integer.parseInt(args[0]); }
      catch (NumberFormatException e) {
        System.err.println("Invalid port number" + port);
        System.exit(0);
      }
    }
    // create a new client
    try {
       Client c = new Client(InetAddress.getLocalHost().getHostAddress(),
	                      port);
    } catch (Exception e) { System.err.println(e); }
  }

  public Client(String host, int port) 
          throws IOException, UnknownHostException {
    // connect to host at port
    System.out.println("test");
    client = new Socket(host, port);
    System.out.println("got server");

    // first build a tree
    TreeNode top = new TreeNode("top");
    top.addChild(new TreeNode("left"));
    top.addChild(new TreeNode("right"));

    // print it out to see how it looks
    System.out.println("source tree:  \n" + a.toString());

    // now write the tree to the socket, then read it back in again
    try {
      ObjectOutput out = new ObjectOutputStream(client.getOutputStream());
      out.writeObject(top);
      out.flush();

      ObjectInputStream in = new ObjectInputStream(client.getInputStream());
      TreeNode n = (TreeNode)in.readObject();
      System.out.println("read tree: \n" + n.toString());
    } catch (Exception e) { System.err.println("exception: " + e); }
  }
}