<div id="content" class="content">
  <div class="timeline">
    <div class="timeline__line"></div>
    <div class="timeline__points">
      
      <div class="point"
           v-for="(point, index) in timelinePoints">
        <div class="upper-content">
          <strong v-text="point.period"></strong>
        </div>
        <div class="circle" 
             v-text="index + 1"
             v-bind:ref="'circle' + index"
             v-on:click="toggleTooltip(index);
                         normalizeSelection(index);">
        </div>
        <div class="bottom-content">
          <div class="tooltip"
               v-bind:ref="'tooltip' + index">
            <p v-text="point.desc"></p>
          </div>
        </div>
      </div>
      
    </div>
  </div>
</div>

@import url(https://fonts.googleapis.com/css?family=Roboto);
@mixin flex($dir, $jus: flex-start, $ali: flex-start, $wrap: nowrap) {
  display: flex;
  flex-direction: $dir;
  justify-content: $jus;
  align-items: $ali;
  flex-wrap: $wrap;
}
 
$timeline-container-h: 560px;
$point-w: 300px;
$point-h: 560px;
$circle-size: 40px;
  
body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  font-family: 'Roboto';
}

.content {
  background: linear-gradient(#61cae6, #60569C);
  height: 100vh;
  @include flex(row, center, center);
}

.timeline {
  background: linear-gradient(90deg, #654e9c 50%, #9b75de 50%);
  width: 100%;
  height: $timeline-container-h;
  @include flex(row, center, center);
  overflow-x: hidden;
  
  &__line {
    // background: radial-gradient(white 50%, gray 90%);
    background: white;
    width: 100%;
    height: 5px;
  }
  
  &__points {
    width: inherit;
    height: $timeline-container-h;
    @include flex(row, space-evenly, center);
    flex-basis: $point-w;
    position: absolute;
  }
}

.point {
  background: rgba(0, 0, 0, 0.1);
  width: $point-w;
  height: $point-h;
  @include flex(column, space-evenly, center);
  .upper-content {
    width: 100%;
    height: calc(#{$point-h} * 0.5 - #{$circle-size});
    @include flex(column, flex-end, center);
    strong {
      color: white;
      font-size: 24px;
      margin-bottom: 24px;
    }
  }
  .bottom-content {
    width: 100%;
    height: calc(#{$point-h} * 0.5 - #{$circle-size});
    @include flex(column, flex-start, center);
  }
}

.short-line {
  background: linear-gradient(white 70%, rgba(0, 0, 0, 0.5) 90%);
  width: 2px;
  height: 50px;
  border-radius: 50%;
  margin-bottom: 36px;
}

.circle {
  background: orange;
  width: $circle-size;
  height: $circle-size;
  @include flex(row, center, center);
  border: 7px solid white;
  border-radius: 50%;
  color: white;
  font-weight: bold;
  box-shadow: 0 7px 16px 0 rgba(238, 145, 36, 0.4);
  &::after {
    content: '';
    display: inline-block;
    border: 5px solid white;
    width: $circle-size * 1.7;
    height: $circle-size * 1.7;
    border-radius: inherit;
    position: absolute;
    transition: all 0.3s ease-out;
    opacity: 0;
  }
  &.active {  
    &::after {
      opacity: 1;
    }
  }
  &:hover {
    cursor: pointer;
  }
}

.tooltip {
  background-color: white;
  padding: 16px;
  border-radius: 16px;
  margin-top: 24px;
  position: relative;
  transition: all 0.3s;
  opacity: 0;
  &.active {
    opacity: 1;
  }
  &::before {
    content: '';
    display: inline-block;
    background: white;
    width: 5px;
    height: 24px;
    position: absolute;
    top: -24px;
    left: 49%;
  }
}

var timeline_points = [
  {period: 'Q1 2018', desc: 'Start verifying and developing technology engaged with 100 brands with various products, financial institution, insurance company & medical industry'},
  {period: 'Q2 2018', desc: 'Pre ICO - Running online & offline campaign. Token presale'},
  {period: 'Q3 2018', desc: 'ICO - Distributing tokens & crowdsale' },
  {period: 'Q4 2018', desc: 'Releasing blueprint technology'},
  {period: 'Q1 2019', desc: 'Close beta for App Launch, first App create API token stacking system and loyalty program'},
  {period: 'Q2 2019', desc: 'Close beta for token stacking system launch token stacking and loyalty program'},
  {period: 'Q3 2019', desc: 'Partner Expand 1500 brand product and logistic around Java' },
  // {period: 'Q4 2019', desc: 'Partner Expand to producers and logistic around Indonesia'},
  // {period: 'Q1 2020', desc: 'Project expansion in South East Asia, logistic partnership airline company'},
  // {period: 'Q2 2020', desc: 'Blockchain forking. Expand capacity'},
];

var vm = new Vue({
  el: '#content',
  data: {
    timelinePoints: timeline_points,
    toggled: false,
  },
  methods: {
    normalizeSelection(idx) {
      var circ, tooltip;
      for(var i = 0; i < 8; i++) {
        if(i != idx) {
          circ = this.$refs['circle'+i][0];
          tooltip = this.$refs['tooltip'+i][0];
          circ.classList.remove('active');
          tooltip.classList.remove('active');
        }
      }
    },
    toggleTooltip(idx) {
      var circ = this.$refs['circle'+idx][0];
      var tooltip = this.$refs['tooltip'+ idx][0];
      if(!circ.classList.contains('active')) {
        circ.classList.add('active');
        tooltip.classList.add('active');
      } else {
        circ.classList.remove('active');
        tooltip.classList.remove('active');
      }
    },
  }
});