function shuffleArray(array) {
  for (var i = array.length - 1; i > 0; i--) {
    var j = Math.floor(Math.random() * (i + 1));
    var temp = array[i];
    array[i] = array[j];
    array[j] = temp;
  }
  return array;
}
 
 
/*****
    A jQuery plugin to facilitate the Van Westendorp pricing research methodology
    Copyright (C) 2016 - Tony Partner (http://partnersurveys.com)
    Licensed MIT, GPL
    Version - 2.0
    Create date - 19/10/16
*****/
(function( $ ){
 
  $.fn.vWPricing25 = function(options) {  
 
    var opts = $.extend( {
      order: [1, 2, 3, 4],
      randomOrder: false
    }, options);
 
    return this.each(function() { 
 
      var thisQuestion = $(this);
 
      thisQuestion.addClass('vwp-question');
 
      // Add some attributes and set the slider max/min values
      var itemsLength = $('.question-item', thisQuestion).length;
      $('.question-item', thisQuestion).each(function(i) {
        var thisInput = $('input[type=text]', this);
        var thisVal = $(thisInput).val();
 
        $(this).attr('data-item', (i+1));
        $(thisInput).attr('data-bs-slider-index', (i+1));
 
        // Slider initial settings
        setTimeout(function() {  
          var thisSliderMin = $(thisInput).bootstrapSlider('getAttribute', 'min');
          $(thisInput).bootstrapSlider('setAttribute', 'min', thisSliderMin+(i));
          var thisSliderMax = $(thisInput).bootstrapSlider('getAttribute', 'max');
          $(thisInput).bootstrapSlider('setAttribute', 'max', thisSliderMax-((itemsLength-1)-i));
 
          if(thisVal == '') {
            $(thisInput).val('');
          }
 
        }, 200);
 
      });
 
      // Slider order
      if(opts.randomOrder == true) {
        shuffleArray(opts.order);
      }
      $(opts.order).each(function(i, val) {
        $('.subquestion-list.questions-list', thisQuestion).append($('.question-item[data-item="'+val+'"]', thisQuestion));
      });
 
      // Listeners on the sliders
      $('input[type=text]', thisQuestion).on('slide', function(event) {
        handleVwpSliders(this, $(this).bootstrapSlider('getValue'));
      });  
      $('input[type=text]', thisQuestion).on('slideStop', function(event) {
        handleVwpSliders(this, $(this).bootstrapSlider('getValue'));
      });
 
      // A function to handle the siders
      function handleVwpSliders(el, sliderVal) {
        var movedIndexNum = $(el).attr('data-bs-slider-index');
 
        var lowerSliders = $('input[type=text]', thisQuestion).filter(function() {
          return $(this).attr('data-bs-slider-index') < movedIndexNum;
        });
        var higherSliders = $('input[type=text]', thisQuestion).filter(function() {
          return $(this).attr('data-bs-slider-index') > movedIndexNum;
        });
 
        $(lowerSliders).each(function(i) {
          var thisIndexNum = $(this).attr('data-bs-slider-index');
          var newSliderVal = sliderVal-(movedIndexNum-thisIndexNum);
          if($(this).bootstrapSlider('getValue') > newSliderVal) {
            var thisRow = $(this).closest('.question-item');
            var thisTooltip = $('.tooltip', thisRow);
            $(this).bootstrapSlider('setValue', newSliderVal);
            $('.tooltip-inner', thisTooltip).text($('input.text', thisRow).val());
            thisTooltip.show().css('margin-left', '-'+(thisTooltip.width()/2)+'px');
 
            var validationInput =  $('input.em_sq_validation', thisRow);
            $(validationInput).val($('input.text', thisRow).val())
            fixnum_checkconditions($(validationInput).attr('value'), $(validationInput).attr('name'), $(validationInput).attr('type'));
          }
        });
        $(higherSliders).each(function(i) {
          var thisIndexNum = $(this).attr('data-bs-slider-index');
          var newSliderVal = sliderVal+(thisIndexNum-movedIndexNum);
          if($(this).bootstrapSlider('getValue') < newSliderVal) {
            var thisRow = $(this).closest('.question-item');
            var thisTooltip = $('.tooltip', thisRow);
            $(this).bootstrapSlider('setValue', newSliderVal);
            $('.tooltip-inner', thisTooltip).text($('input.text', thisRow).val());
            thisTooltip.show().css('margin-left', '-'+(thisTooltip.width()/2)+'px');
 
            var validationInput =  $('input.em_sq_validation', thisRow);
            $(validationInput).val($('input.text', thisRow).val())
            fixnum_checkconditions($(validationInput).attr('value'), $(validationInput).attr('name'), $(validationInput).attr('type'));
          }
        });
      }
 
      // Listener on resizing (override the bootstrap callout behaviour)
      $(window).resize(function() {
        setTimeout(function() {  
          $('input[type=text]', thisQuestion).each(function(i) {
            if($(this).val() != '') {
              var thisRow = $(this).closest('.question-item');
              var thisTooltip = $('.tooltip', thisRow);
              $('.tooltip-inner', thisTooltip).text($.trim($(this).val()));
              thisTooltip.show().css('margin-left', '-'+(thisTooltip.width()/2)+'px');
            }
          });
        }, 1);
      });
    });  
  };
})( jQuery );