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script.js
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script.js
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$(document).ready(function(){
var p1_human = true;
var p2_human = true;
var mainGame;
var manager;
loadStartScreen();
// Click handlers
$(document).on('click', "#1P", function(){
if(!p1_human){
$(this).html("> 1P <");
$("#CPU-X").html("CPU");
p1_human = true;
}
});
$(document).on('click', "#CPU-X", function(){
if(p1_human){
$(this).html("> CPU <");
$("#1P").html("1P");
p1_human = false;
}
});
$(document).on('click', "#2P", function(){
if(!p2_human){
$(this).html("> 2P <");
$("#CPU-O").html("CPU");
p2_human = true;
}
});
$(document).on('click', "#CPU-O", function(){
if(p2_human){
$(this).html("> CPU <");
$("#2P").html("2P");
p2_human = false;
}
});
$(document).on('click', "#start-game", function(){
loadGameScreen();
});
$(document).on('click', "#board>div", function(){
if(manager.turn.type === "Human" && !manager.gameover){
manager.play(this.id);
manager.updateGame();
}
});
$(document).on('click', "#quit-bar>p", function(){
loadStartScreen();
});
$(document).on('click', "#restart-no", function(){
loadStartScreen();
});
$(document).on('click', "#restart-yes", function(){
loadGameScreen();
});
// Prototype definitions
function GameManager(){
this.gameover = false;
this.turn = null;
this.startNewGame = function(){
var p1 = p1_human ? new Player("X", "Human") : new Player("X", "CPU");
var p2 = p2_human ? new Player("O", "Human") : new Player("O", "CPU");
var board = [null, null, null,
null, null, null,
null, null, null];
mainGame = new Game(p1, p2, board);
}
//returns an array with "X", "O", "DRAW" or null and the winning sequence [,,].
this.checkWinner = function(board){
var winningcases = [[0,1,2], [3,4,5], [6,7,8], [0,3,6], [1,4,7], [2,5,8], [0,4,8], [2,4,6]];
for(var i = 0; i < winningcases.length; i++){
var sequenceCheck = [board[winningcases[i][0]], board[winningcases[i][1]], board[winningcases[i][2]]];
if(!sequenceCheck.includes(null) && sequenceCheck[0] === sequenceCheck[1] && sequenceCheck[0] === sequenceCheck[2]){
return [board[winningcases[i][0]], winningcases[i]];
}
}
//no more moves and no winners -> draw
if(!board.includes(null) && !this.gameover){
return ["DRAW", null];
}
return [null, null];
} //end of checkWinner
this.updateGame = function(){
var winner = this.checkWinner(mainGame.board);
mainGame.renderBoard(winner[1]);
switch (winner[0]) {
case "X":
this.gameover = true;
var msg = ("X" === mainGame.player1.symbol) ? "1P WINS" : "2P WINS";
setTimeout(function(){loadGameOverScreen(msg);}, 2000);
break;
case "O":
this.gameover = true;
var msg = ("O" === mainGame.player1.symbol) ? "1P WINS" : "2P WINS";
setTimeout(function(){loadGameOverScreen(msg);}, 2000);
break;
case "DRAW":
this.gameover = true;
setTimeout(function(){loadGameOverScreen("DRAW");}, 2000);
break;
default:
break;
}
if(!this.gameover){
this.changeTurn();
var currentTurn = (this.turn==mainGame.player1) ? "1P" : "2P";
document.getElementById("status-bar").innerHTML = "<p>"+ currentTurn + " TURN</p>"
}
if(this.turn.type === "CPU"){
var move = this.turn.getNextMove(mainGame.board, 0, this.turn.symbol);
mainGame.addMove(move[0], this.turn.symbol);
if(!this.gameover){
setTimeout(function(){manager.updateGame()}, 500);
}
}
} //end of updateGame
this.play = function(pos){
if(!this.gameover){
if(mainGame.isFree(pos)){
mainGame.addMove(pos, this.turn.symbol);
//Check if cpu is next player, if so, it plays the next move
if(!this.gameover && this.turn.type === "CPU"){
var move = this.turn.getNextMove(mainGame.board, 0, this.turn.symbol); //AI
mainGame.addMove(move[0], this.turn.symbol);
setTimeout(function(){this.updateGame();}, 1000);
}
}
}
} //end of play
this.changeTurn = function(){
this.turn = (this.turn==mainGame.player1) ? mainGame.player2 : mainGame.player1;
} //end of changeTurn
}
function Game(p1, p2, board){
this.player1 = p1;
this.player2 = p2;
this.board = board;
this.renderBoard = function(winnerSequence){
for(var i = 0; i < this.board.length; i++){
if(this.board[i] === null){
document.getElementById(parseInt(i)).innerHTML = "";
} else {
var move = "<p>" + this.board[i] + "</p>"
document.getElementById(parseInt(i)).innerHTML = move;
//console.log(i + " " + winnerSequence);
if(winnerSequence != null && winnerSequence.includes(i)){
document.getElementById(parseInt(i)).style.color = "red";
}
}
}
} //end of renderBoard
this.addMove = function(pos, symbol){
this.board[pos] = symbol;
}
this.isFree = function(pos){
return this.board[pos] === null;
}
} //end of game object
function Player(symbol, type){
this.symbol = symbol;
this.type = type;
this.getNextMove = function(board, depth, symbol){
var move;
var isFirstMove = true;
for(var i = 0; i < board.length; i++){
if(board[i] !== null) {
isFirstMove = false;
break;
}
}
if(isFirstMove) return [4, 10]; //first move center
var scores = [-10, -10, -10, -10, -10, -10, -10, -10, -10];
for(var i = 0; i < scores.length; i++){
if(board[i] !== null){
scores[i] = -10; //spot taken
} else {
var newBoard = board.slice();
newBoard[i] = symbol;
var winner = manager.checkWinner(newBoard);
if(winner[0] === null){
//if there is no winner, simulate game
var newSymbol = (symbol === "X") ? "O" : "X";
var newDepth = depth + 1;
var score = this.getNextMove(newBoard, newDepth, newSymbol);
scores[i] = score[1];
} else if (winner[0] === "DRAW"){
//draw
scores[i] = 0;
} else {
//there is a winner
scores[i] = (winner[0] === this.symbol) ? 10 - depth : depth - 10;
}
}
}
var finalScore = -10;
if(this.symbol === symbol){
for(var i = 0; i < scores.length; i++){
if(scores[i] > finalScore){finalScore = scores[i]; move = i;}
}
} else {
finalScore = 10;
for(var i = 0; i < scores.length; i++){
if(scores[i] < finalScore && scores[i] > -10){finalScore = scores[i]; move = i;}
}
}
return [move, finalScore];
}//end of getNextMove
}//end of Player
// Screen loaders
function loadStartScreen(){
p1_human = true;
p2_human = true;
$("#app-wrapper").html('<div id="start-screen" class="container"><div id="title" class="row"><h1>TIC TAC TOE</h1></div><div id="choose-player" class="row"><div class="col-xs-5"><div class="row"><p>PLAYER X</p></div><div class="row"><p class="option" id="1P">> 1P <</p></div><div class="row"><p class="option" id="CPU-X">CPU</p></div></div><div id="choose-player-vs" class="col-xs-2"><p>VS</p></div><div class="col-xs-5"><div class="row"><p>PLAYER O</p></div><div class="row"><p class="option" id="2P">> 2P <</p></div><div class="row"><p class="option" id="CPU-O">CPU</p></div></div><div id="start-game-wrapper" class="col-xs-12"><p id="start-game" class="option">START GAME</p></div></div></div>');
}
function loadGameScreen(){
$("#app-wrapper").html('<div id="game-screen" class="container"><div id="status-bar" class="row"><p>1P TURN</p></div><div id="board" class="row"><div class="col-xs-4" id="0"></div><div class="col-xs-4" id="1"></div><div class="col-xs-4" id="2"></div><div class="col-xs-4" id="3"></div><div class="col-xs-4" id="4"></div><div class="col-xs-4" id="5"></div><div class="col-xs-4" id="6"></div><div class="col-xs-4" id="7"></div><div class="col-xs-4" id="8"></div></div><div id="quit-bar" class="row"><p>RETURN TO MENU</p></div></div>');
manager = new GameManager();
manager.startNewGame();
manager.updateGame();
}
function loadGameOverScreen(result){
$("#app-wrapper").html('<div id="gameover-screen" class="container"><div id="gameover" class="row"><p>GAME OVER</p></div><div id="gameover-result" class="row"><p>'+result+'</p></div><div id="restart-wrapper" class="row"><div id="restart-question" class="col-xs-12"><p>RESTART GAME?</p></div><div id="restart-yes" class="col-xs-offset-2 col-xs-4"><p class="option">YES</p></div><div id="restart-no" class="col-xs-4"><p class="option">NO</p></div></div></div>');
}
function showBoard(gameBoard){
gameBoard = gameBoard.map(function(elem){
return (elem === null) ? "-" : elem;
});
var boardStr = gameBoard[0] + " | " + gameBoard[1] + " | " + gameBoard[2] + "\n----------\n" +
gameBoard[3] + " | " + gameBoard[4] + " | " + gameBoard[5] + "\n----------\n" +
gameBoard[6] + " | " + gameBoard[7] + " | " + gameBoard[8];
console.log(boardStr);
}
});