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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
| <script>
let origBoard;
let huPlayer = 'O';
let aiPlayer = 'X';
const winCombos = [
[0, 1, 2],
[3, 4, 5],
[6, 7, 8],
[0, 4, 8],
[6, 4, 2],
[2, 5, 8],
[1, 4, 7],
[0, 3, 6]
];
const cells = document.querySelectorAll('.cell');
startGame();
function selectSym(sym) {
huPlayer = sym;
aiPlayer = sym === 'O' ? 'X' : 'O';
origBoard = Array.from(Array(9).keys());
for (let i = 0; i < cells.length; i++) {
cells[i].addEventListener('click', turnClick, false);
}
if (aiPlayer === 'X') {
turn(bestSpot(), aiPlayer);
}
document.querySelector('.selectSym').style.display = "none";
}
function startGame() {
document.querySelector('.endgame').style.display = "none";
document.querySelector('.endgame .text').innerText = "";
document.querySelector('.selectSym').style.display = "block";
for (let i = 0; i < cells.length; i++) {
cells[i].innerText = '';
cells[i].style.removeProperty('background-color');
}
}
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).innerHTML = player;
let gameWon = checkWin(origBoard, player);
if (gameWon) gameOver(gameWon);
checkTie();
}
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 ? "#0099ff" : "#f4001f";
}
for (let i = 0; i < cells.length; i++) {
cells[i].removeEventListener('click', turnClick, false);
}
declareWinner(gameWon.player === huPlayer ? "您赢了！" : "您输了.");
}
function declareWinner(who) {
document.querySelector(".endgame").style.display = "block";
document.querySelector(".endgame .text").innerText = who;
const winner = who === "您赢了！" ? "player" : "ai";
fetch("game.php", {
method: "POST",
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({ winner: winner })
})
.then(response => response.json())
.then(data => {
if (data.flag) {
alert("Flag: " + data.flag);
} else if (data.message) {
alert(data.message);
}
})
.catch(error => {
console.error("Error:", error);
});
}
function emptySquares() {
return origBoard.filter((elm, i) => i === elm);
}
function bestSpot() {
return minimax(origBoard, aiPlayer).index;
}
function checkTie() {
if (emptySquares().length === 0) {
for (cell of cells) {
cell.style.backgroundColor = "green";
cell.removeEventListener('click', turnClick, false);
}
declareWinner("平局");
return true;
}
return false;
}
function minimax(newBoard, player) {
var availSpots = emptySquares(newBoard);
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 (let i = 0; i < availSpots.length; i++) {
var move = {};
move.index = newBoard[availSpots[i]];
newBoard[availSpots[i]] = player;
if (player === aiPlayer)
move.score = minimax(newBoard, huPlayer).score;
else
move.score = minimax(newBoard, aiPlayer).score;
newBoard[availSpots[i]] = move.index;
if ((player === aiPlayer && move.score === 10) || (player === huPlayer && move.score === -10))
return move;
else
moves.push(move);
}
let bestMove, bestScore;
if (player === aiPlayer) {
bestScore = -1000;
for (let i = 0; i < moves.length; i++) {
if (moves[i].score > bestScore) {
bestScore = moves[i].score;
bestMove = i;
}
}
} else {
bestScore = 1000;
for (let i = 0; i < moves.length; i++) {
if (moves[i].score < bestScore) {
bestScore = moves[i].score;
bestMove = i;
}
}
}
return moves[bestMove];
}
</script>
|
