/*
 * board.java
 *
 * Created on February 16, 2006, 4:49 PM
 *
 * $ID$     
 */

/**
 *A TicTacToe board along with methods to determine
 *who's turn it is and allow them to make a move.
 *
 * @author dgg
 */
public class board {
    String[][] currentBoard = new String[3][3];
    String turn;
    
    /** Creates a new instance of board */
    //public board(int size) {
        //String[][] currentBoard = new String[size][size];
    //This commented section, as well as the strange definiton
    //of Main.boardSize, has to do with my attempts to make the
    //board size variable.  I never figured out how to initialize
    //an array after declaration, so it didn't work.
    public board(){
    }

    /** Alternates turns, then makes a move for the current turn on the
	(zero-indexed)[i,j]th position on the board. */
    public void move (int i, int j){
	nextTurn();//nextTurn goes first so that we can use it to pick the
	           //starting turn without having to define it explicitly
	currentBoard[i][j]=turn;
    }


    /** Used for debuging initially, left in for historical accuracy.
	not surprisingly, this just outputs the current content of the
	board.  Prints one cell per line.*/
    public void printBoard(){
	int i;
	int j;
	for(i=0;i<3;i++){
	    for(j=0;j<3;j++){
		System.out.println(currentBoard[i][j]);
	    }
	}
    }
    
    /** Returns the current turn */
    public String whosTurn(){
	return turn;
    }
    
    /** Moves to the next turn */
    public void nextTurn(){
	if (turn==null){//check this first, or we get nullPointer errors
	    turn="X";
	}else if (turn.equals("X")){
	    turn="O";
	}
	else if (turn.equals("O")){
	    turn="X";
	}
	else{
	    turn="X";//just in case "turn" gets screwed somehow
	}
    }
}