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script.js
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script.js
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/** Helper function to get element text */
function text(txt){
return txt.innerHTML;
}
/*
* Represents a state in the game
*/
var Init = function(){
// human play with X or O
this.playWith = document.getElementById('pw').value;
// ai playing with X or O
this.aiPw = function(){
return this.playWith === 'X' ? 'O' : 'X';
};
// game result at this state
this.result = 'running';
// get empty cells
this.emptyCells = function(){
var indxs = [];
var cells = document.getElementsByClassName('val');
for(var i = 0; i < 9; i++){
if(text(cells[i]) !== this.playWith && text(cells[i]) !== this.aiPw()){
indxs.push(i);
}
}
return indxs;
};
// not very easy
this.regular = function(available){
var relative = [];
for(var x =0; x < available.length; x++){
if(available[x] - available[x+1] !== -1){
relative.push(available[x]);
}
}
return relative[Math.floor(Math.random() * relative.length)];
};
// AI action
this.aiAction = function(){
this.result = 'wait';
var available = this.emptyCells();
if(available.length > 1){
var randCell = this.regular(available);
}
var cell = document.getElementsByClassName('val');
cell[randCell].innerHTML = this.aiPw();
this.result = 'your turn';
};
// get result
this.getResult = function(){
var cells = document.getElementsByClassName('val');
// check rows
for(var i = 0; i <= 6; i = i +3){
var first = cells[i],
second = cells[i+1],
third = cells[i+2];
if( text(first).length && text(first) === text(second) && text(second) === text(third) ){
this.result = text(first) + '-won';
first.className += ' win';
second.className += ' win';
third.className += ' win';
return true;
}
}
// check cols
for(var i = 0; i <= 2; i++){
var first = cells[i],
second = cells[i+3],
third = cells[i+6];
if( text(first).length && text(first) === text(second) && text(second) === text(third) ){
this.result = text(first) + '-won';
first.className += ' win';
second.className += ' win';
third.className += ' win';
return true;
}
}
// check diagonals
for(var i = 0, j = 4; i <= 2; i = i+2, j = j-2){
var first = cells[i],
second = cells[i+j],
third = cells[i+ 2*j];
if( text(first).length && text(first) === text(second) && text(second) === text(third) ){
this.result = text(first) + '-won';
first.className += ' win';
second.className += ' win';
third.className += ' win';
return true;
}
}
// get empty cells
var empty = this.emptyCells();
if(!empty.length){
// the game is draw
this.result = 'it`s draw';
return true;
}
else{
return false;
}
};
// reset all cells
this.restart = function(){
document.getElementById('h1').innerHTML = 'your turn';
var cells = document.getElementsByClassName('val');
for(var i = 0; i < 9; i++){
cells[i].className = "val";
cells[i].innerHTML = '';
}
};
};
var Game = function(){
var run = new Init();
// check if game still running run ai action
if(!run.getResult()){
run.aiAction();
}
// check if game ended
// show result and rest all cells
if(run.getResult()){
document.getElementById('h1').innerHTML = run.result;
setTimeout(function(){
run.restart()
}, 1200);
}
};
$(document).ready(function(){
// show modal on the begging
$('#myModal').modal();
// get user choosed X or O
$('.pw-X, .pw-O').on('click touchstart', function(){
$('input.pw').val($(this).attr('data-choose'));
});
$('.cell').on('click touchstart', function(e){
var val = $(this).children();
// if cell already used
if(val.text().length){
return false;
}
val.text($('input.pw').val());
// run game instance
new Game();
});
});