(function ($) {
  'use strict';
  $.fn.counterUp = function (options) {
    var settings = $.extend({ time: 400, delay: 10, offset: 100, beginAt: 0, formatter: false, context: 'window', callback: function () {} }, options),
      s;
    return this.each(function () {
      var $this = $(this),
        counter = {
          time: $(this).data('counterup-time') || settings.time,
          delay: $(this).data('counterup-delay') || settings.delay,
          offset: $(this).data('counterup-offset') || settings.offset,
          beginAt: $(this).data('counterup-beginat') || settings.beginAt,
          context: $(this).data('counterup-context') || settings.context,
        };
      var counterUpper = function () {
        var nums = [];
        var divisions = counter.time / counter.delay;
        var num = $(this).attr('data-num') ? $(this).attr('data-num') : $this.text();
        var isComma = /[0-9]+,[0-9]+/.test(num);
        num = num.replace(/,/g, '');
        var decimalPlaces = (num.split('.')[1] || []).length;
        if (counter.beginAt > num) counter.beginAt = num;
        var isTime = /[0-9]+:[0-9]+:[0-9]+/.test(num);
        if (isTime) {
          var times = num.split(':'),
            m = 1;
          s = 0;
          while (times.length > 0) {
            s += m * parseInt(times.pop(), 10);
            m *= 60;
          }
        }
        for (var i = divisions; i >= (counter.beginAt / num) * divisions; i--) {
          var newNum = parseFloat((num / divisions) * i).toFixed(decimalPlaces);
          if (isTime) {
            newNum = parseInt((s / divisions) * i);
            var hours = parseInt(newNum / 3600) % 24;
            var minutes = parseInt(newNum / 60) % 60;
            var seconds = parseInt(newNum % 60, 10);
            newNum = (hours < 10 ? '0' + hours : hours) + ':' + (minutes < 10 ? '0' + minutes : minutes) + ':' + (seconds < 10 ? '0' + seconds : seconds);
          }
          if (isComma) {
            while (/(\d+)(\d{3})/.test(newNum.toString())) {
              newNum = newNum.toString().replace(/(\d+)(\d{3})/, '$1' + ',' + '$2');
            }
          }
          if (settings.formatter) {
            newNum = settings.formatter.call(this, newNum);
          }
          nums.unshift(newNum);
        }
        $this.data('counterup-nums', nums);
        $this.text(counter.beginAt);
        var f = function () {
          if (!$this.data('counterup-nums')) {
            settings.callback.call(this);
            return;
          }
          $this.html($this.data('counterup-nums').shift());
          if ($this.data('counterup-nums').length) {
            setTimeout($this.data('counterup-func'), counter.delay);
          } else {
            $this.data('counterup-nums', null);
            $this.data('counterup-func', null);
            settings.callback.call(this);
          }
        };
        $this.data('counterup-func', f);
        setTimeout($this.data('counterup-func'), counter.delay);
      };
      $this.waypoint(
        function (direction) {
          counterUpper();
          this.destroy();
        },
        { offset: counter.offset + '%', context: counter.context }
      );
    });
  };
})(jQuery);