@use '../config' as *;

.switch-icon {
  @include focus-ring-transition();
  // scss-docs-start switch-icon-css-vars
  --switch-icon-size: #{$switch-icon-size};
  --switch-icon-min-size: #{$switch-icon-min-size};
  --switch-icon-disabled-opacity: #{$switch-icon-disabled-opacity};
  --switch-icon-loading-size: #{$switch-icon-loading-size};
  --switch-icon-loading-border-width: #{$switch-icon-loading-border-width};
  --switch-icon-loading-animation-speed: #{$switch-icon-loading-animation-speed};
  // scss-docs-end switch-icon-css-vars
  position: relative;
  display: inline-block;
  width: var(--switch-icon-size);
  min-width: var(--switch-icon-min-size);
  height: var(--switch-icon-size);
  min-height: var(--switch-icon-min-size);
  padding: 0;
  line-height: 1;
  vertical-align: bottom;
  cursor: pointer;
  background: transparent;
  border: 0;

  &.disabled,
  &:disabled,
  &[aria-disabled='true'] {
    pointer-events: none;
    opacity: var(--switch-icon-disabled-opacity);
  }

  @media (prefers-reduced-motion: reduce) {
    --switch-icon-loading-animation-speed: #{$switch-icon-loading-animation-speed * 2};
  }

  &:focus:not(:focus-visible) {
    outline: none;
  }

  &:focus-visible {
    @include focus-ring(true);
  }

  svg {
    display: block;
    width: 100%;
    height: 100%;
  }

  // Both icons sit centered in the (possibly larger) button box
  .switch-icon-a,
  .switch-icon-b {
    position: absolute;
    inset: 0;
    display: block;
    width: var(--switch-icon-size);
    height: var(--switch-icon-size);
    margin: auto;
  }

  .switch-icon-a {
    opacity: 1;
  }

  .switch-icon-b {
    opacity: 0;
  }

  &.active {
    .switch-icon-a {
      opacity: 0;
    }

    .switch-icon-b {
      opacity: 1;
    }
  }

  // Loading state: both icons hidden, a spinner drawn in their place
  &.switch-icon-loading {
    pointer-events: none;

    .switch-icon-a,
    .switch-icon-b {
      opacity: 0;
      transition: none;
    }

    &::after {
      position: absolute;
      inset-inline-start: calc(50% - var(--switch-icon-loading-size) / 2);
      top: calc(50% - var(--switch-icon-loading-size) / 2);
      width: var(--switch-icon-loading-size);
      height: var(--switch-icon-loading-size);
      content: '';
      border: var(--switch-icon-loading-border-width) var(--border-style) currentColor;
      border-inline-end-color: transparent;
      animation: spinner-border var(--switch-icon-loading-animation-speed) linear infinite;
      @include border-radius(var(--border-radius-pill));
    }
  }
}

// Inside a button (e.g. .btn-action) the button is the target and carries hover and focus
.btn .switch-icon {
  --switch-icon-min-size: var(--switch-icon-size);
  vertical-align: middle;
  pointer-events: none;

  // the button's own icon sizing and margins would misplace the two stacked icons
  .icon {
    width: 100%;
    min-width: 0;
    height: 100%;
    margin: 0;
  }
}

// Fade variant
.switch-icon-fade {
  .switch-icon-a,
  .switch-icon-b {
    @include transition(opacity 0.5s);
  }
}

// Scale variant
.switch-icon-scale {
  .switch-icon-a,
  .switch-icon-b {
    @include transition(opacity 0.5s, transform 0s 0.5s);
  }

  .switch-icon-b {
    transform: scale(1.5);
  }

  &.active {
    .switch-icon-a,
    .switch-icon-b {
      @include transition(opacity 0s, transform 0.5s);
    }

    .switch-icon-b {
      transform: scale(1);
    }
  }
}

// Flip variant
.switch-icon-flip {
  perspective: 10em;

  .switch-icon-a,
  .switch-icon-b {
    backface-visibility: hidden;
    transform-style: preserve-3d;
    @include transition(opacity 0s 0.2s, transform 0.4s ease-in-out);
  }

  .switch-icon-a {
    opacity: 1;
    transform: rotateY(0deg);
  }

  .switch-icon-b {
    opacity: 1;
    transform: rotateY(-180deg);
  }

  &.active {
    .switch-icon-a {
      opacity: 1;
      transform: rotateY(180deg);
    }

    .switch-icon-b {
      opacity: 1;
      transform: rotateY(0deg);
    }
  }
}

// Slide variant
.switch-icon-slide-up,
.switch-icon-slide-left,
.switch-icon-slide-start,
.switch-icon-slide-right,
.switch-icon-slide-end,
.switch-icon-slide-down {
  overflow: hidden;

  .switch-icon-a,
  .switch-icon-b {
    @include transition(opacity $transition-time, transform $transition-time);
  }

  .switch-icon-a {
    transform: translateY(0);
  }

  .switch-icon-b {
    transform: translateY(100%);
  }

  &.active {
    .switch-icon-a {
      transform: translateY(-100%);
    }

    .switch-icon-b {
      transform: translateY(0);
    }
  }
}

.switch-icon-slide-left,
.switch-icon-slide-start {
  .switch-icon-a {
    transform: translateX(0);
  }

  .switch-icon-b {
    /* rtl:ignore */
    transform: translateX(calc(var(--dir) * 100%));
  }

  &.active {
    .switch-icon-a {
      /* rtl:ignore */
      transform: translateX(calc(var(--dir) * -100%));
    }

    .switch-icon-b {
      transform: translateX(0);
    }
  }
}

.switch-icon-slide-right,
.switch-icon-slide-end {
  .switch-icon-a {
    transform: translateX(0);
  }

  .switch-icon-b {
    /* rtl:ignore */
    transform: translateX(calc(var(--dir) * -100%));
  }

  &.active {
    .switch-icon-a {
      /* rtl:ignore */
      transform: translateX(calc(var(--dir) * 100%));
    }

    .switch-icon-b {
      transform: translateX(0);
    }
  }
}

.switch-icon-slide-down {
  .switch-icon-a {
    transform: translateY(0);
  }

  .switch-icon-b {
    transform: translateY(-100%);
  }

  &.active {
    .switch-icon-a {
      transform: translateY(100%);
    }

    .switch-icon-b {
      transform: translateY(0);
    }
  }
}