@use "sass:math";

systelab-percentage-circle {
  //styling
  $borderWidth: 7px;
  $animationTime: 1.5s;
  $border-color-default: #eee;
  $border-color-fill: #ffb43e;
  $size: 150px;

  //Create how many steps
  $howManySteps: 100; //this needs to be even.
  //for fun try using 20 and changing in the HTML the data-percentage to 15 or 85


  .percentage-circle {
    width: $size;
    height: $size;
    line-height: $size;
    background: none;
    margin: 0 auto;
    box-shadow: none;
    position: relative;

    &:after {
      content: "";
      width: 100%;
      height: 100%;
      border-radius: 50%;
      border: $borderWidth solid $border-color-default;
      position: absolute;
      top: 0;
      left: 0;
    }

    > span {
      width: 50%;
      height: 100%;
      overflow: hidden;
      position: absolute;
      top: 0;
      z-index: 1;
    }

    .percentage-circle-left {
      left: 0;
    }

    .percentage-circle-bar {
      width: 100%;
      height: 100%;
      background: none;
      border-width: $borderWidth;
      border-style: solid;
      position: absolute;
      top: 0;
      border-color: $border-color-fill;
    }

    .percentage-circle-left .percentage-circle-bar {
      left: 100%;
      border-top-right-radius: math.div($size, 2);
      border-bottom-right-radius: math.div($size, 2);
      border-left: 0;
      -webkit-transform-origin: center left;
      transform-origin: center left;
    }

    .percentage-circle-right {
      right: 0;

      .percentage-circle-bar {
        left: -100%;
        border-top-left-radius: math.div($size,2);
        border-bottom-left-radius: math.div($size,2);
        border-right: 0;
        -webkit-transform-origin: center right;
        transform-origin: center right;
      }
    }

    .percentage-circle-value {
      display: flex;
      border-radius: 50%;
      font-size: 36px;
      text-align: center;
      line-height: 20px;
      align-items: center;
      justify-content: center;
      height: 100%;
      font-weight: 300;

      div {
        margin-top: 10px;
      }

      span {
        font-size: 12px;
        text-transform: uppercase;
      }
    }
  }

  /* This for look creates the 	necessary css animation names
  Due to the split circle of percentage-circle-left and percentage-circle right, we must use the animations on each side.
  */
  @for $i from 1 through $howManySteps {
    $stepName: ($i * math.div(100, $howManySteps));

    //animation only the left side if below 50%
    @if $i <= math.div($howManySteps, 2) {
      .percentage-circle[data-percentage="#{$stepName}"] {
        .percentage-circle-right .percentage-circle-bar {
          animation: loading-#{$i} $animationTime linear forwards;
        }

        .percentage-circle-left .percentage-circle-bar {
          animation: 0;
        }
      }
    }
    //animation only the right side if above 50%
    @if $i > math.div($howManySteps, 2) {
      .percentage-circle[data-percentage="#{$stepName}"] {
        .percentage-circle-right .percentage-circle-bar {
          animation: loading-#{math.div($howManySteps, 2)} $animationTime linear forwards; //set the animation to longest animation
        }

        .percentage-circle-left .percentage-circle-bar {
          animation: loading-#{$i - math.div($howManySteps, 2)} $animationTime linear forwards $animationTime;
        }
      }
    }
  }

  //animation
  @for $i from 1 through math.div($howManySteps, 2) {
    $degrees: math.div(180, math.div($howManySteps, 2));
    $degrees: ($degrees*$i);
    @keyframes loading-#{$i}{
      0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
      }
      100% {
        -webkit-transform: rotate($degrees);
        transform: rotate(#{$degrees}deg);
      }
    }
  }
}