-
Notifications
You must be signed in to change notification settings - Fork 0
/
script.js
145 lines (126 loc) · 3.34 KB
/
script.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
var origBoard;
const huPlayer = 'O';
const aiPlayer = 'X';
const winCombos = [
[0, 1, 2],
[3, 4, 5],
[6, 7, 8],
[0, 3, 6],
[1, 4, 7],
[2, 5, 8],
[0, 4, 8],
[6, 4, 2]
]
const cells = document.querySelectorAll('.cell');
startGame();
function startGame() {
document.querySelector(".endgame").style.display = "none";
origBoard = Array.from(Array(9).keys());
for (var i = 0; i < cells.length; i++) {
cells[i].innerText = '';
cells[i].style.removeProperty('background-color');
cells[i].addEventListener('click', turnClick, false);
}
}
function turnClick(square) {
if (typeof origBoard[square.target.id] == 'number') {
turn(square.target.id, huPlayer)
if (!checkWin(origBoard, huPlayer) && !checkTie()) turn(bestSpot(), aiPlayer);
}
}
function turn(squareId, player) {
origBoard[squareId] = player;
document.getElementById(squareId).innerText = player;
let gameWon = checkWin(origBoard, player)
if (gameWon) gameOver(gameWon)
}
function checkWin(board, player) {
let plays = board.reduce((a, e, i) =>
(e === player) ? a.concat(i) : a, []);
let gameWon = null;
for (let [index, win] of winCombos.entries()) {
if (win.every(elem => plays.indexOf(elem) > -1)) {
gameWon = {index: index, player: player};
break;
}
}
return gameWon;
}
function gameOver(gameWon) {
for (let index of winCombos[gameWon.index]) {
document.getElementById(index).style.backgroundColor =
gameWon.player == huPlayer ? "green" : "red";
}
for (var i = 0; i < cells.length; i++) {
cells[i].removeEventListener('click', turnClick, false);
}
declareWinner(gameWon.player == huPlayer ? "You win!" : "You lose.");
}
function declareWinner(who) {
document.querySelector(".endgame").style.display = "block";
document.querySelector(".endgame .text").innerText = who;
}
function emptySquares() {
return origBoard.filter(s => typeof s == 'number');
}
function bestSpot() {
return minimax(origBoard, aiPlayer).index;
}
function checkTie() {
if (emptySquares().length == 0) {
for (var i = 0; i < cells.length; i++) {
cells[i].style.backgroundColor = "gray";
cells[i].removeEventListener('click', turnClick, false);
}
declareWinner("Tie Game!")
return true;
}
return false;
}
function minimax(newBoard, player) {
var availSpots = emptySquares();
if (checkWin(newBoard, huPlayer)) {
return {score: -10};
} else if (checkWin(newBoard, aiPlayer)) {
return {score: 10};
} else if (availSpots.length === 0) {
return {score: 0};
}
var moves = [];
for (var i = 0; i < availSpots.length; i++) {
var move = {};
move.index = newBoard[availSpots[i]];
newBoard[availSpots[i]] = player;
if (player == aiPlayer) {
var result = minimax(newBoard, huPlayer);
move.score = result.score;
} else {
var result = minimax(newBoard, aiPlayer);
move.score = result.score;
}
newBoard[availSpots[i]] = move.index;
moves.push(move);
}
var bestMove;
if(player === aiPlayer) {
var bestScore = -10000;
for(var i = 0; i < moves.length; i++) {
if (moves[i].score > bestScore) {
bestScore = moves[i].score;
bestMove = i;
}
}
} else {
var bestScore = 10000;
for(var i = 0; i < moves.length; i++) {
if (moves[i].score < bestScore) {
bestScore = moves[i].score;
bestMove = i;
}
}
}
return moves[bestMove];
}
window.addEventListener('load', () => {
document.querySelector('.preloader').classList.add('preloader--hidden');
});