package bingo.game;import java.util.Stack;import bingo.shared.*;class RingMaster implements States {    private SocketGate socketGate;    private GameParameters gameParameters;    private NotaryPublic notary;    private Roster roster;    private Stack announcedBalls;    private int gameNumber = 0;    private int state = BEFOREINITIALIZATION;    RingMaster() throws java.io.IOException {	socketGate = new SocketGate();	gameParameters = new GameParameters();	notary = new NotaryPublic();	roster = new Roster();	announcedBalls = new Stack();	announcedBalls.push(new BingoBall(BingoBall.FREE_SPACE));    }    GameParameters getGameParameters() {	return gameParameters;    }    Roster getRoster() {	return roster;    }    int getGameNumber() {	return gameNumber;    }    synchronized void waitForFirstPlayer() {	gameNumber++;	state = WAITING;	socketGate.sendGameStatusMessage(statusString());        while (state == WAITING) {            try {               wait();            } catch (InterruptedException e) {            }        }        socketGate.sendGameStatusMessage("Beginning count down ... ");    }    synchronized void waitForGameToEnd() {        while (gameInProgress()) {            try {               wait();            } catch (InterruptedException e) {            }        }    }    boolean ready() {	return (state == BEFOREINITIALIZATION) ? false : true;    }    boolean isCountingDown() {	return (state == COUNTINGDOWN) ? true : false;    }    synchronized boolean isRegistering() {	return (state == WAITING || state == COUNTINGDOWN) ? true : false;    }    boolean isCheckingForWinner() {	return (state == CHECKINGFORWINNER) ? true : false;    }    synchronized boolean gameInProgress() {	return (state == PLAYING || state == CHECKINGFORWINNER) ? true : false;    }    synchronized void startCountDown() {	state = COUNTINGDOWN;	notifyAll();    }    void startGame() {	state = PLAYING;	socketGate.sendGameStatusMessage("Game Starting...");    }    void setCheckingForWinner() {	state = CHECKINGFORWINNER;    }    synchronized void setGameResumed() {	if (state == CHECKINGFORWINNER)	    state = PLAYING;    }    synchronized void setGameOver() {	state = GAMEOVER;        announceBall(new BingoBall(BingoBall.GAME_OVER));	announcedBalls.removeAllElements();	announcedBalls.push(new BingoBall(BingoBall.FREE_SPACE));	roster.removeAllElements();	notifyAll();    }    void signTheCards(Card[] cards) {	try {	    for (int i = 0; i < cards.length; i++)	        notary.signTheCard(cards[i], gameNumber);	} catch (Exception e) {	    // PENDING: can't sign the cards, what to do?	}    }    boolean verify(Card c) {	int colMatches = 0;	int rowMatches = 0;	int diagMatches = 0;	int otherDiagMatches = 0;	if (!(notary.verifyTheSignature(c, gameNumber)))	    return false;	for (int i = 0; i < Card.SIZE; i ++) {	    for (int j = 0; j < Card.SIZE; j ++) {		if (announcedBalls.contains(c.boardValues[i][j]))		    rowMatches ++;		if (announcedBalls.contains(c.boardValues[j][i]))		    colMatches ++;		if ((i == j) && announcedBalls.contains(c.boardValues[i][j]))		    diagMatches ++;		if (((i + j) == (Card.SIZE-1)) && announcedBalls.contains(c.boardValues[j][i]))		    otherDiagMatches ++;	    }	    if (colMatches == Card.SIZE) {		return true;	    } else if (rowMatches == Card.SIZE) {		return true;	    } else {		rowMatches = 0;		colMatches = 0;	    }	}	if (diagMatches == Card.SIZE) {	    return true;	} else if (otherDiagMatches == Card.SIZE) {	    return true;	}	return false;    }    void announceBall(BingoBall b) {	socketGate.sendBall(b);	socketGate.sendGameStatusMessage(statusString());	announcedBalls.push(b);    }    void sendTimeRemainingMessage(int timeRemaining) {	socketGate.sendGameStatusMessage(statusString(timeRemaining));    }    void sendPlayerStatusMessage(PlayerRecord p) {	socketGate.sendPlayerStatusMessage(p);    }    String statusString() {	return statusString(-1);    }    private String statusString(int anArgument) {	switch (state) {	case BEFOREINITIALIZATION:	    return "The BINGO server isn't ready yet.";	case WAITING:	    return "Waiting for first player to register for game # " + gameNumber + ".";	case COUNTINGDOWN:	    return "Game # " + gameNumber + " starts in "		   + anArgument + " seconds.";	case PLAYING:	    return "Game #" + gameNumber + " in progress. "		   + announcedBalls.size() + " balls announced.";	case CHECKINGFORWINNER:	    return "Game paused while checking for winner."		   + announcedBalls.size() + " balls announced.";	case GAMEOVER:	    return "Game over.";	default:	    return "Nuttin'.";	}    }}