//
// Copyright IBM Corp. 2021
//
// This source code is licensed under the Apache-2.0 license found in the
// LICENSE file in the root directory of this source tree.
//

@use 'keyframes';
@use '../theme' as *;
@use '../config' as *;
@use '../utilities/high-contrast-mode' as *;

/// Skeleton loading animation
/// @access public
/// @example @include skeleton;
/// @group utilities
@mixin skeleton {
  position: relative;
  padding: 0;
  border: none;
  background: $skeleton-background;
  box-shadow: none;
  pointer-events: none;

  &:hover,
  &:focus,
  &:active {
    border: none;
    cursor: default;
    outline: none;
  }

  &::before {
    position: absolute;
    animation: 3000ms ease-in-out #{$prefix}--skeleton infinite;
    background: $skeleton-element;
    block-size: 100%;
    content: '';
    inline-size: 100%;
    inset-inline-start: 0;
    will-change: transform-origin, transform, opacity;

    @media (prefers-reduced-motion: reduce) {
      animation: none;
    }
  }

  // High Contrast Mode support
  @include high-contrast-mode {
    background: CanvasText;

    &::before {
      background: Canvas;
      forced-color-adjust: none;
    }
  }
}

/// Circular Skeleton loading animation
/// @access public
/// @example @include circular-skeleton;
/// @group utilities
@mixin circular-skeleton {
  position: relative;
  overflow: hidden;
  border-radius: 50%;
  background: $skeleton-background;

  &::before {
    position: absolute;
    animation: 3000ms ease-in-out #{$prefix}--skeleton infinite;
    background: $skeleton-element;
    block-size: 100%;
    content: '';
    inline-size: 200%;
    will-change: transform-origin, transform, opacity;

    @media (prefers-reduced-motion: reduce) {
      animation: none;
    }
  }

  //High Contrast Mode
  //Ensure Skeleton is visible and animated in Windows HCM
  @include high-contrast-mode {
    background: CanvasText;

    &::before {
      background: Canvas;
      forced-color-adjust: none;
    }
  }
}