//
// Copyright IBM Corp. 2016, 2026
//
// 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 'sass:map';

@use 'vars' as *;
@use '../../config' as *;
@use '../../motion' as *;
@use '../../spacing' as *;
@use '../../theme' as *;
@use '../../type' as *;
@use '../../utilities/component-reset';
@use '../../utilities/convert';
@use '../../utilities/custom-property';
@use '../../utilities/layout';
@use 'tokens' as *;

$button-focus-color: custom-property.get-var('button-focus-color', $focus);

@mixin button-base {
  // https://caniuse.com/mdn-css_types_length_lh
  --temp-1lh: (
    #{custom-property.get-var(
        'body-compact-01-line-height',
        map.get($body-compact-01, line-height)
      )} * 1em
  );
  --temp-expressive-1lh: (
    #{custom-property.get-var(
        'body-compact-02-line-height',
        map.get($body-compact-02, line-height)
      )} * 1em
  );
  // -1px to compensate for border width
  --temp-padding-block-max: calc(
    (#{custom-property.get-var('layout-size-height-lg')} - var(--temp-1lh)) / 2 -
      #{convert.to-rem(1px)}
  );

  @include component-reset.reset;
  @include type-style('body-compact-01');

  position: relative;
  display: inline-flex;
  flex-shrink: 0;
  justify-content: space-between;
  border-radius: $button-border-radius;
  // Fix to remove added margins on buttons in safari (see #5155)
  margin: 0;
  cursor: pointer;
  inline-size: max-content;
  max-inline-size: convert.to-rem(320px);
  min-block-size: layout.size('height');
  outline: none;
  // -1px to compensate for border width
  padding-block: min(
    calc((layout.size('height') - var(--temp-1lh)) / 2 - convert.to-rem(1px)),
    var(--temp-padding-block-max)
  );
  padding-inline: calc(layout.density('padding-inline') - convert.to-rem(1px))
    calc(
      layout.density('padding-inline') * 3 + convert.to-rem(16px) - convert.to-rem(
          1px
        )
    );
  text-align: start;
  text-decoration: none;
  transition:
    background $duration-fast-01 motion(entrance, productive),
    box-shadow $duration-fast-01 motion(entrance, productive),
    border-color $duration-fast-01 motion(entrance, productive),
    outline $duration-fast-01 motion(entrance, productive);
  vertical-align: top;

  &:disabled,
  &:hover:disabled,
  &:focus:disabled,
  &.#{$prefix}--btn--disabled,
  &.#{$prefix}--btn--disabled:hover,
  &.#{$prefix}--btn--disabled:focus {
    border-color: $button-disabled;
    background: $button-disabled;
    box-shadow: none;
    color: $text-on-color-disabled;
    cursor: not-allowed;
  }

  .#{$prefix}--btn__icon {
    position: absolute;
    flex-shrink: 0;
    block-size: convert.to-rem(16px);
    inline-size: convert.to-rem(16px);
    // -1px to compensate for border width
    inset-block-start: min(
      calc(
        (layout.size('height') - convert.to-rem(16px)) / 2 - convert.to-rem(1px)
      ),
      var(--temp-padding-block-max)
    );
    inset-inline-end: layout.density('padding-inline');
    margin-block-start: convert.to-rem(1px);
  }
}

/// Button variant styles
/// @access private
/// @group button
@mixin button-theme(
  $bg-color,
  $border-color,
  $font-color,
  $hover-bg-color,
  $icon-color,
  $active-color
) {
  border-width: $button-outline-width;
  border-style: solid;
  border-color: $border-color;
  background-color: $bg-color;
  color: $font-color;

  // Apply hover styles only on devices that support hover
  @media (any-hover: hover) {
    &:hover {
      background-color: $hover-bg-color;
    }
  }

  &:focus {
    border-color: $button-focus-color;
    box-shadow:
      inset 0 0 0 $button-outline-width $button-focus-color,
      inset 0 0 0 $button-border-width $background;
  }

  &:active {
    background-color: $active-color;
  }

  .#{$prefix}--btn__icon,
  .#{$prefix}--btn__icon path:not([data-icon-path]):not([fill='none']) {
    fill: $icon-color;
  }
}

@mixin button-padding-large {
  align-items: baseline;
  padding-block-start: $spacing-05;
  padding-inline: $spacing-05 $spacing-10;
}