// RmCheckersClient.java is a client that interacts with Sam, a checkers 
// server. It is designed to illustrate how to communicate with the server
// in a minimal way.  It is not meant to be beautiful java code.
// Given the correct machine name for the server, a user id, and a password
// (_machine, _user, and _password in the code), running this program will 
// initiate connection and start a game with the default player. 
// 
// the program has been tested and used under Java 5.0, but probably would
// work under older versions.
//
// Copyright (C) 2008 Robert McCartney
 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.

// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA

import java.io.*;
import java.net.*;

public class RmCheckersClient {

    private final static String _user = "99";  // need legit id here
    private final static String _password = "622662";  // need password here
    private final static String _opponent = "0";
    private final String _machine  = "machinename.engr.uconn.edu"; // need machine here
    private int port = 3499;
    private Socket _socket = null;
    private PrintWriter _out = null;
    private BufferedReader _in = null;

    private String _gameID;
    private String _myColor;
  
    public RmCheckersClient(){	
	_socket = openSocket();
    }

    public Socket getSocket(){
	return _socket;
    }

    public PrintWriter getOut(){
	return _out;
    }

    public BufferedReader getIn(){
	return _in;
    }
     
    public void setGameID(String id){
	_gameID = id;
    }
    
    public String getGameID() {
	return _gameID;
    }

    public void setColor(String color){
	_myColor = color;
    }
    
    public String getColor() {
	return _myColor;
    }

    public static void main(String[] argv){
	String readMessage;
	RmCheckersClient myClient = new RmCheckersClient();

	try{
	    myClient.readAndEcho(); // start message
	    myClient.readAndEcho(); // ID query
	    myClient.writeMessageAndEcho(_user); // user ID
	    
	    myClient.readAndEcho(); // password query 
	    myClient.writeMessage(_password);  // password

	    myClient.readAndEcho(); // opponent query
	    myClient.writeMessageAndEcho(_opponent);  // opponent

	    myClient.setGameID(myClient.readAndEcho().substring(5,9)); // game 
	    myClient.setColor(myClient.readAndEcho().substring(6,11));  // color
	    System.out.println("I am playing as "+myClient.getColor()+ " in game number "+ myClient.getGameID());
	    readMessage = myClient.readAndEcho();  
	    // depends on color--a black move if i am white, Move:Black:i:j
	    // otherwise a query to move, ?Move(time):
	    if (myClient.getColor().equals("White")) {
		readMessage = myClient.readAndEcho();  // move query
		myClient.writeMessageAndEcho("(2:4):(3:5)");
		readMessage = myClient.readAndEcho();  // white move
		readMessage = myClient.readAndEcho();  // black move
		readMessage = myClient.readAndEcho();  // move query
		// here you would need to move again
	    }
	    else {
		myClient.writeMessageAndEcho("(5:3):(4:4)");
		readMessage = myClient.readAndEcho();  // black move
		readMessage = myClient.readAndEcho();  // white move
		readMessage = myClient.readAndEcho();  // move query
		// here you would need to move again
	    }
	   
	    myClient.getSocket().close();
	} catch  (IOException e) {
	    System.out.println("Failed in read/close");
	    System.exit(1);
	}
    }

    public String readAndEcho() throws IOException
    {
	String readMessage = _in.readLine();
	System.out.println("read: "+readMessage);
	return readMessage;
    }

    public void writeMessage(String message) throws IOException
    {
	_out.print(message+"\r\n");  
	_out.flush();
    }
 
    public void writeMessageAndEcho(String message) throws IOException
    {
	_out.print(message+"\r\n");  
	_out.flush();
	System.out.println("sent: "+ message);
    }
			       
    public  Socket openSocket(){
	//Create socket connection, adapted from Sun example
	try{
       _socket = new Socket(_machine, port);
       _out = new PrintWriter(_socket.getOutputStream(), true);
       _in = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
     } catch (UnknownHostException e) {
       System.out.println("Unknown host: " + _machine);
       System.exit(1);
     } catch  (IOException e) {
       System.out.println("No I/O");
       System.exit(1);
     }
     return _socket;
  }
}