<!--
  rangeslider.js
  https://github.com/andreruffert/rangeslider.js
  by André Ruffert - @andreruffert
-->
<div class="main">
  <label for="panel_size">Panel Size</label>
  <input
      type="range"
      name="participants"
      min="5"
      max="51"
      value="20"
  >
  <span class="rangeslider__tooltip" id ="range-tooltip"></span>
</div>

html,
body {
  font-family: Century Gothic,CenturyGothic,AppleGothic,sans-serif;
  color: #404040;
  height: 100%;
  margin: 0;
}

body {
  padding: 0 20px;
  color: #716894;
}

.main {
  width: 400px;
  margin: auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

label {
  display: block;
  margin-bottom: 2.5em;
  font-size: 13px;
  font-weight: bold;
}

.rangeslider__tooltip {
  display: block;
  margin-top: 2.5em;
  font-size: 12px;
  color: #a59eb5;
}

.rangeslider,
input[type='range'] {
  max-width: 400px;
}

.rangeslider__handle {
  border-radius: 22px;
  line-height: 42px;
  text-align: center;
  font-weight: bold;
  
  &:after {
    background: 0;
  }
}

.rangeslider,
.rangeslider__fill {
  display: block;
  border-radius: 10px;
}

.rangeslider {
  background: #e6e5ea;
    background-image:
    linear-gradient(
      to right, 
      #4bc67d 30%, #f1c40f 45%, #b94a48 99%
  );
  position: relative;
}

.rangeslider--horizontal {
  height: 10px;
  width: 100%;
}

.rangeslider--vertical {
  width: 20px;
  min-height: 150px;
  max-height: 100%;
}

.rangeslider--disabled {
  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=40);
  opacity: 0.4;
}

.rangeslider__fill {
  // background: #4bc67d;
  position: absolute;
}
.rangeslider--horizontal .rangeslider__fill {
  top: 0;
  height: 100%;
}
.rangeslider--vertical .rangeslider__fill {
  bottom: 0;
  width: 100%;
}

.rangeslider__handle {
  background: white;
  border: 6px solid #4bc67d;
  cursor: pointer;
  display: inline-block;
  width: 40px;
  height: 40px;
  position: absolute;
  -moz-border-radius: 50%;
  -webkit-border-radius: 50%;
  border-radius: 50%;
  
  &.js-low {
    border-color: #4bc67d;
  }
    
  &.js-med {
    border-color: #f1c40f;
  }
    
  &.js-high {
    border-color: #b94a48;
  }
}
.rangeslider__handle:after {
  content: "";
  display: block;
  width: 18px;
  height: 18px;
  margin: auto;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  -moz-border-radius: 50%;
  -webkit-border-radius: 50%;
  border-radius: 50%;
}
.rangeslider__handle:active {
  
}
.rangeslider--horizontal .rangeslider__handle {
  top: -20px;
  touch-action: pan-y;
  -ms-touch-action: pan-y;
}
.rangeslider--vertical .rangeslider__handle {
  left: -10px;
  touch-action: pan-x;
  -ms-touch-action: pan-x;
}

input[type="range"]:focus + .rangeslider .rangeslider__handle {
  -moz-box-shadow: 0 0 8px rgba(255, 0, 255, 0.9);
  -webkit-box-shadow: 0 0 8px rgba(255, 0, 255, 0.9);
  box-shadow: 0 0 8px rgba(255, 0, 255, 0.9);
}

const $element = $('input[type="range"]');
const $tooltip = $('#range-tooltip');
const sliderStates = [
  {name: "low", tooltip: "Great, we're confident we can complete your project within <strong>24 hours</strong> of launch.", range: _.range(5, 26) },
  {name: "med", tooltip: "Looks good! We can complete a project of this size within <strong>48 hours</strong> of launch.", range: _.range(26, 51)},
  {name: "high", tooltip: "With a project of this size we'd like to talk with you before setting a completion timeline.", range: [51] },
];
var currentState;
var $handle;

$element
  .rangeslider({
    polyfill: false,
    onInit: function() {
      $handle = $('.rangeslider__handle', this.$range);
      updateHandle($handle[0], this.value);
      updateState($handle[0], this.value);
    }
  })
  .on('input', function() {
    updateHandle($handle[0], this.value);
    checkState($handle[0], this.value);
  });

// Update the value inside the slider handle
function updateHandle(el, val) {
  el.textContent = val;
}

// Check if the slider state has changed
function checkState(el, val) {
  // if the value does not fall in the range of the current state, update that shit.
  if (!_.contains(currentState.range, parseInt(val))) {
    updateState(el, val);
  }
}

// Change the state of the slider
function updateState(el, val) {
  for (var j = 0; j < sliderStates.length; j++){
    if (_.contains(sliderStates[j].range, parseInt(val))) {
      currentState = sliderStates[j];
      // updateSlider();
    }
  }
  // If the state is high, update the handle count to read 50+
  if (currentState.name == "high") {
    updateHandle($handle[0], "50+");
  }
  // Update handle color
  $handle
    .removeClass (function (index, css) {
    return (css.match (/(^|\s)js-\S+/g) ||   []).join(' ');
  })
    .addClass("js-" + currentState.name);
  // Update tooltip
  $tooltip.html(currentState.tooltip);
}