/*
 * Created on Jul 19, 2005
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */

/* The Piece class has two uses:
 * 1 - Keep track of how to mark the players.  This is the static data.
 * 2 - Return the value of an individual piece, includes location.
 */

import java.awt.Point;

class Piece 
{
	/* First, the static members and methods to keep track of which player
	 * has which symbol.
	 */
	static char Player1 = 'X';
	static char Player2 = 'O';
	static char Empty = ' ';
	
	public void swapPieces() {
		char temp = Player1;
		Player1 = Player2;
		Player2 = temp;
	}
	
	public boolean setPlayer1(char p1) {
	/* Returns true on error */
		if(p1 == Player2 || p1 == Empty)
			return true;
		else {
			Player1 = p1;
			return false;
		}
	}
	
	public boolean setPlayer2(char p2) {
		/* Returns true on error */
		if(p2 == Player1 || p2 == Empty)
			return true;
		else {
			Player2 = p2;
			return false;
		}
	}
	
	public boolean setEmpty(char e) {
		/* Returns true on error */
		if(e == Player1 || e == Player2)
			return true;
		else {
			Empty = e;
			return false;
		}
	}
	
	/* Now for the iplementation for instantiated objects */
	private int player;
	private Point location;
	
	public Piece() {
		/* Default value of (0,0) */
		this(Empty, 0, 0);
	}
	
	public Piece(char p) {
		this(p, 0, 0);
	}

	public Piece(char p, int x, int y) {
		location = new Point();
		set(p);
		set(x, y);
	}
	
	public Piece(Piece p) {
		this(p.getPiece(), p.location);
	}
	
	public Piece(char p, Point location) {
		this(p, location.x, location.y);
	}
	
	public Piece(int x, int y) {
		this(Empty, x, y);
	}
		
	public boolean equals(Piece p) {
		return (player==player && location.equals(p.location));
	}
	
	/* p - char indicating marker of piece. should be Piece.Player1 or Piece.Player2
	 *     what is really stored is the player, not the character
	 * x - int of the x location (0,2)
	 * y - int of the y location (0,2)
	 * returns true on error
	 */
	public boolean set(char p, int x, int y) {
		return set(p) || set(x, y);
	}
	
	public boolean set(char p) {
		if(p==Player1) {
			player = 1;
			return false;
		}
		else if(p==Player2) {
			player = 2;
			return false;
		}
		else if(p==Empty) {
			player = 0;
			return false;
		}
		else
			return true;
	}
	
	public boolean set(Piece p) {
		return set(p.getPiece()) || set(p.location.x, p.location.y);
	}
	
	public boolean set(int x, int y) {
	/* Returns true on error */
		if(x>=0 && x<3 && y>=0 && y<3) {
			location.setLocation(x, y);
			return false;
		} else
			return true;
	}
	
	public int getX() {
		return location.x;
	}
	
	public int getY() {
		return location.y;
	}
	
	public char getPiece() {
		if(player==1) return Player1;
		else if(player==2) return Player2;
		else return Empty;
	}
}