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HTML

CSS

H1 { 
    background:black;
    color:white;
    margin:0px 0px 2px 0px;
    font-size:20px;
    padding:2px 1px 5px 1px;
    text-align:center;    
}

body {
    font-family:verdana,helvetica,arial,sans-serif;
    border:0px; margin:0px; padding:0px;
        
    background:url(
        data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAIUlEQVQYV2N89urtfwYiACNIoZSYMCMhtaMK8YYQ0cEDAG5yJ8eLRhTfAAAAAElFTkSuQmCC
    ) repeat;
}

/* board */
.sudoku_board {
    margin:6px auto;
  
    overflow: hidden;
    
    -webkit-user-select: none;  
    -moz-user-select: none;    
    -ms-user-select: none;      
    user-select: none;
    
    box-shadow: 0px 0px 5px 5px #bdc3c7;
}

.sudoku_board .cell {    
    width:11.11%;    
    display: inline-block;    
    float:left;
    cursor:pointer;    
    text-align: center;
    overflow: hidden;  
    
    -webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */
	    -moz-box-sizing: border-box;    /* Firefox, other Gecko */
	    box-sizing: border-box;
    
    box-shadow: 0px 0px 0px 1px #bdc3c7;
  
    background:white;
}

.sudoku_board .cell.border_h {
    box-shadow: 0px 0px 0px 1px #bdc3c7, inset 0px -2px 0 0 #34495e;    
}

.sudoku_board .cell.border_v {
    box-shadow: 0px 0px 0px 1px #bdc3c7, inset -2px 0 0 #34495e;
}

.sudoku_board .cell.border_h.border_v {
    box-shadow: 0px 0px 0px 1px #bdc3c7, inset -2px 0 0 black, inset 0px -2px 0 black;
}

.sudoku_board .cell span {
    color:#2c3e50;
    font-size:14px;
    text-align:middle;    
}

.sudoku_board .cell.selected, .sudoku_board .cell.selected.fix {
    background:#FFE;    
}

.sudoku_board .cell.selected.current {
    position:relative;
    background: #3498db;
    font-weight:bold;
    box-shadow: 0px 0px 3px 3px #bdc3c7;
}

.sudoku_board .cell.selected.current span {
    color:white;
}

.sudoku_board .cell.selected.group {
    color:blue;    
}

.sudoku_board .cell span.samevalue, .sudoku_board .cell.fix span.samevalue {
    font-weight:bold;  
    color:#3498db;
}

.sudoku_board .cell.notvalid, .sudoku_board .cell.selected.notvalid{
    font-weight:bold;
    color:white;;
    background:#e74c3c;
}

.sudoku_board .cell.fix {
    background:#ecf0f1;
    cursor:not-allowed;
}

.sudoku_board .cell.fix span {
  color:#7f8c8d;
}

.sudoku_board .cell .solution {
  font-size:10px;
  color:#d35400;
}

.sudoku_board .cell .note {
    color:#bdc3c7;    
    width:50%;    
    height:50%;
    display: inline-block;    
    float:left;
    text-align:center;
    font-size:14px;
  
    -webkit-box-sizing: border-box;
	    -moz-box-sizing: border-box;
	    box-sizing: border-box;
}

.gameover_container .gameover {
    color:white;
    font-weight:bold;
	    text-align:center; 
    
    display:block;
    position:absolute;       
    width:90%;    
    padding:10px;
    
    box-shadow: 0px 0px 5px 5px #bdc3c7;
}

.restart {
  background:#7F8C8D;
  color:#ecf0f1;
}

/* console */
.board_console_container, .gameover_container {
    background-color: rgba(127, 140, 141, 0.7);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    
     -webkit-user-select: none;  
     -moz-user-select: none;    
     -ms-user-select: none;      
     user-select: none;
}

.board_console {
    display:block;
    position:absolute;        
    width:50%;        
    color:white;
    background-color: rgba(127, 140, 141, 0.7);
    box-shadow: 0px 0px 5px 5px #bdc3c7;
}

.board_console .num {
    width:33.33%;    
    color:#2c3e50;    
    padding: 1px;
    display: inline-block;    
    font-weight:bold;
    font-size:24px;
    text-align: center;    
    cursor:pointer;
    
    -webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */
	    -moz-box-sizing: border-box;    /* Firefox, other Gecko */
	    box-sizing: border-box;
    
    box-shadow: 0px 0px 0px 1px #bdc3c7;
}

.board_console .num:hover {
    color:white;
    background:#f1c40f;
}

.board_console .num.remove {
    width:66.66%;    
}

.board_console .num.note {
    background:#95a5a6;
    color:#ecf0f1;
}

.board_console .num.note:hover {
    background:#95a5a6;
    color:#f1c40f;
}

.board_console .num.selected {
    background:#f1c40f;
    box-shadow: 0px 0px 3px 3px #bdc3c7;
}

.board_console .num.note.selected {
    background:#f1c40f;  
    box-shadow: 0px 0px 3px 3px #bdc3c7;
}

.board_console .num.note.selected:hover {
  color:white;
}

.board_console .num.no:hover {
    color:white;
    cursor:not-allowed;
}

.board_console .num.remove:hover {
    color:white;
    background:#c0392b;
}

.statistics {
    text-align:center;    
}

#sudoku_menu {
    background-color: black;
    position: absolute;
    z-index:2;
    width: 100%;
    height: 100%;
    left: -100%;
    box-sizing: border-box;
    -moz-box-sizing: border-box;
}

#sudoku_menu ul {
   margin: 0;
   padding: 100px 0px 0px 0px;
   list-style: none;
}

#sudoku_menu ul li{
  margin: 0px 50px;
}

#sudoku_menu ul li a {
  text-align:center;
  padding: 15px 20px;
  font-size: 28px;
  font-weight: bold;
  color: white;
  text-decoration: none;
  display: block;
  border-bottom: 1px solid #2c3e50;
}

#sudoku_menu.open-sidebar {
  left:0px;
}

#sidebar-toggle {
    z-index:3;
    background: #bdc3c7;
    border-radius: 3px;
    display: block;
    position: relative;
    padding: 22px 18px;
    float: left;
}

#sidebar-toggle .bar{
    display: block;
    width: 28px;
    margin-bottom: 4px;
    height: 4px;
    background-color: #f0f0f0;
    border-radius: 1px;   
}

#sidebar-toggle .bar:last-child{
     margin-bottom: 0;   
}

/*Responsive Stuff*/

@media all and (orientation:portrait) and (min-width: 640px){
    h1 { font-size:50px; }
    .statistics { font-size:30px; }    
    .sudoku_board .cell span { font-size:60px; }    
    .board_console .num { font-size:60px; }
}

@media all and (orientation:landscape) and (min-height: 640px){
    h1 { font-size:50px; }
    .statistics { font-size:30px; }
    .sudoku_board .cell span { font-size:50px; }
    .board_console .num { font-size:50px; }
}

@media all and (orientation:portrait) and (max-width: 1000px){
    .sudoku_board .cell span { font-size:30px; }   
}

@media all and (orientation:portrait) and (max-width: 640px){
	.sudoku_board .cell span { font-size:24px; }
  .sudoku_board .cell .note { font-size:10px; }
}

@media all and (orientation:portrait) and (max-width: 470px){
	.sudoku_board .cell span { font-size:16px; }
.sudoku_board .cell .note { font-size:8px; }
}

@media all and (orientation:portrait) and (max-width: 320px){
	.sudoku_board .cell span { font-size:12px; }
.sudoku_board .cell .note { font-size:8px; }
}

@media all and (orientation:portrait) and  (max-width: 240px){
	.sudoku_board .cell span { font-size:10px; }   
}

function Sudoku(params) {
    var t = this;
  
    this.INIT = 0;
    this.RUNNING = 1;
    this.END = 2;
    
    this.id = params.id || 'sudoku_container';
    this.displaySolution = params.displaySolution || 0;
    this.displaySolutionOnly = params.displaySolutionOnly || 0;
    this.displayTitle = params.displayTitle || 0;
    this.highlight = params.highlight || 0;  
    this.fixCellsNr = params.fixCellsNr || 32;
    this.n = 3;    
    this.nn = this.n * this.n;      
    this.cellsNr = this.nn * this.nn;
    
    if (this.fixCellsNr < 10 ) this.fixCellsNr = 10;
    if (this.fixCellsNr > 70 ) this.fixCellsNr = 70;      
    
    this.init();
  
    //counter    
    setInterval(function(){
      t.timer();
    },1000);
          
    return this;
}

Sudoku.prototype.init = function() {    
    this.status = this.INIT;
    this.cellsComplete = 0;
    this.board = [];
    this.boardSolution = [];
    this.cell = null;
    this.markNotes = 0;  
    this.secondsElapsed = 0;
    
    if(this.displayTitle == 0) {
      $('#sudoku_title').hide();
    }
    
    this.board = this.boardGenerator(this.n, this.fixCellsNr);
    
    return this;
};

Sudoku.prototype.timer = function() {
  if (this.status === this.RUNNING) {
    this.secondsElapsed++;
    $('.time').text( '' + this.secondsElapsed );
  }
};

/**
Shuffle array
*/
Sudoku.prototype.shuffle = function(array) {
    var currentIndex   = array.length, 
        temporaryValue = 0,
        randomIndex = 0;        
    
    while (0 !== currentIndex) {
        randomIndex   = Math.floor(Math.random() * currentIndex);
        currentIndex -= 1;
        temporaryValue      = array[currentIndex];
        array[currentIndex] = array[randomIndex];
        array[randomIndex]  = temporaryValue;
     }
    
    return array;
};

/**
Generate the sudoku board
*/
Sudoku.prototype.boardGenerator = function(n, fixCellsNr) {
    var matrix_fields = [],
        index = 0,
        i = 0,
        j = 0,
        j_start = 0,
        j_stop = 0;
  
    //generate solution
    this.boardSolution = [];
  
    //shuffle matrix indexes
    for (i = 0; i < this.nn; i++) {
        matrix_fields[i] = i+1;
    }  
    
    //shuffle sudoku 'collors'
    matrix_fields = this.shuffle(matrix_fields);
    for (i = 0; i < n*n; i++) {
        for (j = 0; j < n*n; j++) {
            var value = Math.floor( (i*n + i/n + j) % (n*n) + 1 );            
            this.boardSolution[index] = value;
            index++;
        }
    }
    
    //shuffle sudokus indexes of bands on horizontal and vertical
    var blank_indexes = [];    
    for (i = 0; i < this.n; i++) {
        blank_indexes[i] = i+1;        
    }
  
    
    //shuffle sudokus bands horizontal
    var bands_horizontal_indexes = this.shuffle(blank_indexes);
    var board_solution_tmp = [];
    index = 0;
    for (i = 0; i < bands_horizontal_indexes.length; i++) {
        j_start = (bands_horizontal_indexes[i] -1) * this.n * this.nn;
        j_stop  = bands_horizontal_indexes[i] * this.n * this.nn;
        
        for( j = j_start; j < j_stop; j++ ) {
          board_solution_tmp[index] = this.boardSolution[j];
          index++;
        }
    }
    this.boardSolution = board_solution_tmp;
    
    
    //shuffle sudokus bands vertical
    var bands_vertical_indexes   = this.shuffle(blank_indexes);
    board_solution_tmp = [];
    index = 0;    
    for (k = 0; k < this.nn; k++) {      
      for (i = 0; i < this.n; i++) {      
        j_start = (bands_vertical_indexes[i]-1) * this.n;
        j_stop  = bands_vertical_indexes[i] * this.n;
      
        for( j = j_start; j < j_stop; j++ ) {
          board_solution_tmp[index] = this.boardSolution[j + (k*this.nn)];
          index++;
        }
      }
    }
    this.boardSolution = board_solution_tmp;
    
    //shuffle sudokus lines on each bands horizontal
    //TO DO
  
    //shuffle sudokus columns on each bands vertical
    //TO DO
    
    //board init
    var board_indexes =[],
        board_init = [];
  
    //shuffle board indexes and cut empty cells    
    for (i=0; i < this.boardSolution.length; i++) {
        board_indexes[i] = i;
        board_init[i] = 0;
    }
    
    board_indexes = this.shuffle(board_indexes);
    board_indexes = board_indexes.slice(0, this.fixCellsNr);
    
    //build the init board    
    for (i=0; i< board_indexes.length; i++) {
        board_init[ board_indexes[i] ] = this.boardSolution[ board_indexes[i] ];
        if (parseInt(board_init[ board_indexes[i] ]) > 0) {
          this.cellsComplete++;
        }
    }
    
    return (this.displaySolutionOnly) ? this.boardSolution : board_init;    
};

/**
Draw sudoku board in the specified container
*/
Sudoku.prototype.drawBoard = function(){
    var index = 0,
        position       = { x: 0, y: 0 },
        group_position = { x: 0, y: 0 };
    
    var sudoku_board = $('<div></div>').addClass('sudoku_board');
    var sudoku_statistics = $('<div></div>')
                                .addClass('statistics')
    .html('<b>Cells:</b> <span class="cells_complete">'+ this.cellsComplete +'/'+this.cellsNr +'</span> <b>Time:</b> <span class="time">' + this.secondsElapsed + '</span>');
    
    $('#'+ this.id).empty();
    
    //draw board 
    for (i=0; i < this.nn; i++) {
        for (j=0; j < this.nn; j++) {
            position       = { x: i+1, y: j+1 };
            group_position = { x: Math.floor((position.x -1)/this.n), y: Math.floor((position.y-1)/this.n) };
            
            var value = (this.board[index] > 0 ? this.board[index] : ''),
                value_solution = (this.boardSolution[index] > 0 ? this.boardSolution[index] : ''),
                cell = $('<div></div>')
                            .addClass('cell')
                            .attr('x', position.x)
                            .attr('y', position.y)
                            .attr('gr', group_position.x +''+ group_position.y)
                            .html('<span>'+ value +'</span>' );
          
            if (this.displaySolution) {
               $('<span class="solution">('+ value_solution +')</span>').appendTo(cell);
            }
          
            if ( value > 0) {
                cell.addClass('fix');
            }
            
            if ( position.x % this.n === 0 && position.x != this.nn ) {
                cell.addClass('border_h');
            }
            
            if ( position.y % this.n === 0 && position.y != this.nn ) {
                cell.addClass('border_v');
            }
            
            cell.appendTo(sudoku_board);
            index++;
        }
    }
    
    sudoku_board.appendTo('#'+ this.id);
    
    //draw console
    var sudoku_console_cotainer = $('<div></div>').addClass('board_console_container');
    var sudoku_console = $('<div></div>').addClass('board_console');
    
    for (i=1; i <= this.nn; i++) {
        $('<div></div>').addClass('num').text(i).appendTo(sudoku_console);
    }
    $('<div></div>').addClass('num remove').text('X').appendTo(sudoku_console);
    $('<div></div>').addClass('num note').text('?').appendTo(sudoku_console);
    
    //draw gameover
    var sudoku_gameover = $('<div class="gameover_container"><div class="gameover">Congratulation! <button class="restart">Play Again</button></div></div>');
    
    //add all to sudoku container
    sudoku_console_cotainer.appendTo('#'+ this.id).hide();
    sudoku_console.appendTo(sudoku_console_cotainer);    
    sudoku_statistics.appendTo('#'+ this.id);
    sudoku_gameover.appendTo('#'+ this.id).hide();  
  
    //adjust size
    this.resizeWindow();
};

Sudoku.prototype.resizeWindow = function(){
    console.time("resizeWindow");
    
    var screen = { w: $(window).width(), h: $(window).height() };
    
    //adjust the board
    var b_pos = $('#'+ this.id +' .sudoku_board').offset(),
        b_dim = { w: $('#'+ this.id +' .sudoku_board').width(),  h: $('#'+ this.id +' .sudoku_board').height() },
        s_dim = { w: $('#'+ this.id +' .statistics').width(),    h: $('#'+ this.id +' .statistics').height()   };
    
    var screen_wr = screen.w + s_dim.h + b_pos.top + 10;
  
    if (screen_wr > screen.h) {
        $('#'+ this.id +' .sudoku_board').css('width', (screen.h - b_pos.top - s_dim.h - 14) );
        $('#'+ this.id +' .board_console').css('width', (b_dim.h/2) );
    } else {
        $('#'+ this.id +' .sudoku_board').css('width', '98%' );
        $('#'+ this.id +' .board_console').css('width', '50%' );
    }
    
    var cell_width = $('#'+ this.id +' .sudoku_board .cell:first').width(),
        note_with  = Math.floor(cell_width/2) -1;
  
    $('#'+ this.id +' .sudoku_board .cell').height(cell_width);
    $('#'+ this.id +' .sudoku_board .cell span').css('line-height', cell_width+'px');    
    $('#'+ this.id +' .sudoku_board .cell .note').css({'line-height': note_with+'px' ,'width' : note_with, 'height': note_with});
    
    //adjust the console
    var console_cell_width = $('#'+ this.id +' .board_console .num:first').width();
    $('#'+ this.id +' .board_console .num').css('height', console_cell_width);
    $('#'+ this.id +' .board_console .num').css('line-height', console_cell_width+'px');
    
    //adjust console
    b_dim = { w: $('#'+ this.id +' .sudoku_board').width(),  h: $('#'+ this.id +' .sudoku_board').width() };
    b_pos = $('#'+ this.id +' .sudoku_board').offset();
    c_dim = { w: $('#'+ this.id +' .board_console').width(), h: $('#'+ this.id +' .board_console').height() };
    
    var c_pos_new = { left : ( b_dim.w/2 - c_dim.w/2 + b_pos.left ), top  : ( b_dim.h/2 - c_dim.h/2 + b_pos.top ) };    
    $('#'+ this.id +' .board_console').css({'left': c_pos_new.left, 'top': c_pos_new.top});
    
    //adjust the gameover container
    var gameover_pos_new = { left : ( screen.w/20 ), top  : ( screen.w/20 + b_pos.top ) };    
    
    $('#'+ this.id +' .gameover').css({'left': gameover_pos_new.left, 'top': gameover_pos_new.top});    
    
    console.log('screen', screen);    
    console.timeEnd("resizeWindow");
};

/**
Show console
*/
Sudoku.prototype.showConsole = function(cell) {
  $('#'+ this.id +' .board_console_container').show();
  
  var 
    t = this,
    oldNotes = $(this.cell).find('.note');
  
  //init
  $('#'+ t.id +' .board_console .num').removeClass('selected');
    
  //mark buttons
  if(t.markNotes) {
    //select markNote button  
    $('#'+ t.id +' .board_console .num.note').addClass('selected');
  
    //select buttons
    $.each(oldNotes, function() {
      var noteNum = $(this).text();
      $('#'+ t.id +' .board_console .num:contains('+ noteNum +')').addClass('selected');
    });  
  }
  
  return this;
};

/**
Hide console
*/
Sudoku.prototype.hideConsole = function(cell) {
  $('#'+ this.id +' .board_console_container').hide();
  return this;
};

/**
Select cell and prepare it for input from sudoku board console
*/
Sudoku.prototype.cellSelect = function(cell){    
    this.cell = cell;
    
    var value = $(cell).text() | 0,
        position       = { x: $(cell).attr('x'), y: $(cell).attr('y') } ,
        group_position = { x: Math.floor((position.x -1)/3), y: Math.floor((position.y-1)/3) },
        horizontal_cells = $('#'+ this.id +' .sudoku_board .cell[x="'+ position.x +'"]'),
        vertical_cells   = $('#'+ this.id +' .sudoku_board .cell[y="'+ position.y +'"]'),
        group_cells      = $('#'+ this.id +' .sudoku_board .cell[gr="'+ group_position.x +''+ group_position.y +'"]'),
        same_value_cells = $('#'+ this.id +' .sudoku_board .cell span:contains('+value+')');
    
    //remove all other selections
    $('#'+ this.id +' .sudoku_board .cell').removeClass('selected current group');
    $('#'+ this.id +' .sudoku_board .cell span').removeClass('samevalue');
    //select current cell
    $(cell).addClass('selected current');
    
    //highlight select cells
    if (this.highlight > 0) {        
        horizontal_cells.addClass('selected');
        vertical_cells.addClass('selected');
        group_cells.addClass('selected group');
        same_value_cells.not( $(cell).find('span') ).addClass('samevalue');
    }
    
    if ($( this.cell ).hasClass('fix')) {
        $('#'+ this.id +' .board_console .num').addClass('no');
    } else {
        $('#'+ this.id +' .board_console .num').removeClass('no');
        
        this.showConsole();
        this.resizeWindow();
    }    
};

/**
Add value from sudoku console to selected board cell
*/
Sudoku.prototype.addValue = function(value) {
    console.log('prepare for addValue', value);
    
    var    
        position       = { x: $(this.cell).attr('x'), y: $(this.cell).attr('y') },        
        group_position = { x: Math.floor((position.x -1)/3), y: Math.floor((position.y-1)/3) },
        
        horizontal_cells = '#'+ this.id +' .sudoku_board .cell[x="'+ position.x +'"]',
        vertical_cells   = '#'+ this.id +' .sudoku_board .cell[y="'+ position.y +'"]',
        group_cells      = '#'+ this.id +' .sudoku_board .cell[gr="'+ group_position.x +''+ group_position.y +'"]',
          
        horizontal_cells_exists = $(horizontal_cells + ' span:contains('+ value +')'),
        vertical_cells_exists   = $(vertical_cells + ' span:contains('+ value +')'),
        group_cells_exists      = $(group_cells + ' span:contains('+ value +')'),
        
        horizontal_notes = horizontal_cells + ' .note:contains('+ value +')',
        vertical_notes   = vertical_cells + ' .note:contains('+ value +')',
        group_notes      = group_cells + ' .note:contains('+ value +')',
          
        old_value = parseInt($( this.cell ).not('.notvalid').text()) || 0;
      
  
    if ($( this.cell ).hasClass('fix')) {
        return;
    }        
  
    //delete value or write it in cell
    $( this.cell ).find('span').text( (value === 0) ? '' : value );
        
    if ( this.cell !== null && ( horizontal_cells_exists.length || vertical_cells_exists.length || group_cells_exists.length ) ) {
        if (old_value !== value) {
            $( this.cell ).addClass('notvalid');            
        } else {            
            $(this.cell).find('span').text('');            
        }
    } else {
        //add value
        $(this.cell).removeClass('notvalid');        
        console.log('Value added ', value); 
      
        //remove all notes from current cell,  line column and group
        $(horizontal_notes).remove();
        $(vertical_notes).remove();
        $(group_notes).remove();      
    }
    
    //recalculate completed cells
    this.cellsComplete = $('#'+ this.id +' .sudoku_board .cell:not(.notvalid) span:not(:empty)').length;
    console.log('is game over? ', this.cellsComplete, this.cellsNr, (this.cellsComplete === this.cellsNr) );
    //game over
    if (this.cellsComplete === this.cellsNr) {
        this.gameOver();
    }
      
    $('#'+ this.id +' .statistics .cells_complete').text(''+this.cellsComplete+'/'+this.cellsNr);  
    
    return this;
};

/**
Add note from sudoku console to selected board cell
*/
Sudoku.prototype.addNote = function(value) {
  console.log('addNote', value);
 
  var 
    t = this,
    oldNotes = $(t.cell).find('.note'),
    note_width = Math.floor($(t.cell).width() / 2);
  
  //add note to cell
  if (oldNotes.length < 4) {
    $('<div></div>')
        .addClass('note')
        .css({'line-height' : note_width+'px', 'height': note_width -1, 'width': note_width -1})
        .text(value)
        .appendTo( this.cell );    
  }
  
  return this;
};

/**
Remove note from sudoku console to selected board cell
*/
Sudoku.prototype.removeNote = function(value) {
  if (value === 0) {    
      $(this.cell).find('.note').remove();
  } else {    
      $(this.cell).find('.note:contains('+value+')').remove();        
  }
  
  return this;
};

/**
End game routine
*/
Sudoku.prototype.gameOver = function(){
    console.log('GAME OVER!');  
    this.status = this.END;   
  
    $('#'+ this.id +' .gameover_container').show();
};

/**
Run a new sudoku game
*/
Sudoku.prototype.run = function(){
    this.status = this.RUNNING;
  
    var t = this;
    this.drawBoard();
    
    //click on board cell
    $('#'+ this.id +' .sudoku_board .cell').on('click', function(e){
        t.cellSelect(this);
    });
    
    //click on console num
    $('#'+ this.id +' .board_console .num').on('click', function(e){
        var 
            value          = $.isNumeric($(this).text()) ? parseInt($(this).text()) : 0,
            clickMarkNotes = $(this).hasClass('note'),
            clickRemove = $(this).hasClass('remove'),
            numSelected    = $(this).hasClass('selected');
                
        if (clickMarkNotes) {
            console.log('clickMarkNotes');
            t.markNotes = !t.markNotes;
            
            if(t.markNotes) { 
                $(this).addClass('selected'); 
            } else { 
                $(this).removeClass('selected');
                t.removeNote(0).showConsole();
            }
        
        } else {
            if (t.markNotes) {
                if (!numSelected) {
                    if (!value) {
                        t.removeNote(0).hideConsole();
                    } else {
                        t.addValue(0).addNote(value).hideConsole();
                    }
                } else {
                    t.removeNote(value).hideConsole();
                }
            } else {
                t.removeNote(0).addValue(value).hideConsole();
            }
        }        
    });
    
    //click outer console
    $('#'+ this.id +' .board_console_container').on('click', function(e){        
        if ( $(e.target).is('.board_console_container') ) {
            $(this).hide();
        }                
    });
    
    $( window ).resize(function() {
        t.resizeWindow();
    });
};

//main
$(function() {
    console.time("loading time");    
    
    //init        
    $('head').append('<meta name="viewport" content="initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,width=device-width,height=device-height,target-densitydpi=device-dpi,user-scalable=yes" />');
    
    //game  
    var game = new Sudoku({ 
                    id: 'sudoku_container',                    
                    fixCellsNr: 30,
                    highlight : 1,
                    displayTitle : 1,
                    //displaySolution: 1,
                    //displaySolutionOnly: 1,
               });
    
    game.run();
  
    $('#sidebar-toggle').on('click', function(e){
      $('#sudoku_menu').toggleClass("open-sidebar");
    });
  
     //restart game
    $('#'+ game.id +' .restart').on('click', function(){
        game.init().run();
    });
  
    $('#sudoku_menu .restart').on('click', function(){
        game.init().run();
        $('#sudoku_menu').removeClass('open-sidebar');
    });
    
    console.timeEnd("loading time");
});