@import '../../style/var';
@import '../../style/animation';

.hl-loading {
  position: relative;
  color: $loading-spinner-color;
  font-size: 0;
  vertical-align: middle;

  &__spinner {
    position: relative;
    display: inline-block;
    width: $loading-spinner-size;
    // compatible for 1.x, users may set width or height in root element
    max-width: 100%;
    height: $loading-spinner-size;
    max-height: 100%;
    vertical-align: middle;
    animation: hl-rotate $loading-spinner-animation-duration linear infinite;

    &--spinner {
      animation-timing-function: steps(12);

      i {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;

        &::before {
          display: block;
          width: 2px;
          height: 25%;
          margin: 0 auto;
          background-color: currentColor;
          border-radius: 40%;
          content: ' ';
        }

        &:nth-of-type(1) {
          transform: rotate(30deg);
          opacity: 1;
        }
        &:nth-of-type(2) {
          transform: rotate(60deg);
          opacity: 0.9375;
        }
        &:nth-of-type(3) {
          transform: rotate(90deg);
          opacity: 0.875;
        }
        &:nth-of-type(4) {
          transform: rotate(120deg);
          opacity: 0.8125;
        }
        &:nth-of-type(5) {
          transform: rotate(150deg);
          opacity: 0.75;
        }
        &:nth-of-type(6) {
          transform: rotate(180deg);
          opacity: 0.6875;
        }
        &:nth-of-type(7) {
          transform: rotate(210deg);
          opacity: 0.625;
        }
        &:nth-of-type(8) {
          transform: rotate(240deg);
          opacity: 0.5625;
        }
        &:nth-of-type(9) {
          transform: rotate(270deg);
          opacity: 0.5;
        }
        &:nth-of-type(10) {
          transform: rotate(300deg);
          opacity: 0.4375;
        }
        &:nth-of-type(11) {
          transform: rotate(330deg);
          opacity: 0.375;
        }
        &:nth-of-type(12) {
          transform: rotate(360deg);
          opacity: 0.3125;
        }
      }
    }

    &--circular {
      animation-duration: 2s;
    }
  }

  &__circular {
    display: block;
    width: 100%;
    height: 100%;

    circle {
      animation: hl-circular 1.5s ease-in-out infinite;
      stroke: currentColor;
      stroke-width: 3;
      stroke-linecap: round;
    }
  }

  &__text {
    display: inline-block;
    margin-left: $padding-xs;
    color: $loading-text-color;
    font-size: $loading-text-font-size;
    vertical-align: middle;
  }

  &--vertical {
    display: flex;
    flex-direction: column;
    align-items: center;

    .hl-loading__text {
      margin: $padding-xs 0 0;
    }
  }
}

@keyframes hl-circular {
  0% {
    stroke-dasharray: 1, 200;
    stroke-dashoffset: 0;
  }

  50% {
    stroke-dasharray: 90, 150;
    stroke-dashoffset: -40;
  }

  100% {
    stroke-dasharray: 90, 150;
    stroke-dashoffset: -120;
  }
}