//Main class and GUI

public class Chess {
	private GameBoard board;

	//User's first click for a move.
	private Integer clickRow;  //null means no first click made currently.
	private Integer clickColumn;

	private ArrayList<GameState> gameStateHistory; //Stack of GameBoard states for the move undo.
	private ArrayList<Move> moveHistory;  //Stack of tuples (moves) so they can be displayed.
	private ArrayList<String> moveNotationHistory;  //Stack of move notations.

	public void start() {
		//Set up graphics on the screen, buttons
		//Set up the initial board
		//Set up empty move history, game history,  notation history.
		//clickRow and clickCol are null
		//Set up mouse/click events
	}

	//Reset to the intial game position.
	public void reset() {
		//Set up the initial board
		//Clear out clickRo and clickCol
		//Clera out all the histories.
	}

	//AI makes a move
	public void moveAI() {
		//Ask the gameState for a list of all legal moves.
		//Get one of those in the list uniformly at random.
		makeMove(...);
	}

	private void makeMove(...) {
		//Clone the gameState object for the current state of the game, tell it to make the move, add it to the move history
		//add the notation for it
		//add the move to the history as well
	}

	//For the human moving
	public void mouseClick() {
		//If it is the first click (null check) then record it, updtae the GUI to show highlighting
		//else attempt the move:

		makeMove(...);
	}

	//Undo button for the most recent move
	public void undo() {
		//Pop those 3 history object things and update the GUI.
	}

}