@use "sass:math";
@use "@wordpress/base-styles/colors" as *;
@use "@wordpress/base-styles/mixins" as *;
@use "@wordpress/base-styles/variables" as *;
@use "../utils/theme-variables" as *;

$toggle-width: $grid-unit-40;
$toggle-height: $grid-unit-20;
$toggle-border-width: 1px;
$toggle-thumb-size:  $grid-unit-15;

$transition-duration: 0.2s;

.components-form-toggle {
	position: relative;
	isolation: isolate;
	display: inline-block;
	height: $toggle-height;

	// Unchecked state.
	.components-form-toggle__track {
		position: relative;
		content: "";
		display: inline-block;
		box-sizing: border-box;
		vertical-align: top;
		background-color: $white;
		border: $toggle-border-width solid $gray-600;
		width: $toggle-width;
		height: $toggle-height;
		border-radius: math.div($toggle-height, 2);

		@media not (prefers-reduced-motion) {
			transition:
				$transition-duration background-color ease,
				$transition-duration border-color ease;
		}

		overflow: hidden;

		// Windows High Contrast Mode
		&::after {
			content: "";
			position: absolute;
			inset: 0;
			box-sizing: border-box;
			// Expand the border to fake a solid in Windows High Contrast Mode.
			border-top: #{ $toggle-height } solid transparent;

			@media not (prefers-reduced-motion) {
				transition: $transition-duration opacity ease;
			}

			opacity: 0;
		}
	}

	.components-form-toggle__thumb {
		display: block;
		position: absolute;
		box-sizing: border-box;
		top: math.div($toggle-thumb-size, 6);
		left: math.div($toggle-thumb-size, 6);
		width: $toggle-thumb-size;
		height: $toggle-thumb-size;
		border-radius: $radius-round;

		@media not (prefers-reduced-motion) {
			transition:
				$transition-duration transform ease,
				$transition-duration background-color ease-out;
		}

		background-color: $gray-900;
		box-shadow: $elevation-x-small;

		// Transparent border acts as a fill in Windows High Contrast Mode.
		border: math.div($toggle-thumb-size, 2) solid transparent;
	}

	// Checked state.
	&.is-checked .components-form-toggle__track {
		background-color: $components-color-accent;
		border-color: $components-color-accent;

		// Windows High Contrast Mode
		&::after {
			opacity: 1;
		}
	}

	.components-form-toggle__input:focus + .components-form-toggle__track {
		@include button-style-outset__focus($components-color-accent);
	}

	&.is-checked {
		.components-form-toggle__thumb {
			background-color: $white;
			border-width: 0; // Zero out the border color to make the thumb invisible in Windows High Contrast Mode.
			transform: translateX($toggle-width - ($toggle-border-width * 4) - ($toggle-height - ($toggle-border-width * 4)));
		}
	}

	// Disabled state:
	&.is-disabled,
	.components-disabled & {
		.components-form-toggle__track {
			background-color: $components-color-gray-100;
			border-color: $components-color-gray-300;

			@media ( forced-colors: active ) {
				border-color: GrayText;
			}
		}

		.components-form-toggle__thumb {
			background-color: $components-color-gray-400;
			box-shadow: none;

			@media ( forced-colors: active ) {
				border-color: GrayText;
			}
		}

		&.is-checked .components-form-toggle__track {
			background-color: $components-color-gray-400;
			border-color: $components-color-gray-400;

			@media ( forced-colors: active ) {
				border-color: GrayText;

				&::after {
					border-top-color: GrayText;
				}
			}
		}

		&.is-checked .components-form-toggle__thumb {
			background-color: $white;
		}
	}
}

// This needs specificity to override inherited checkbox styles.
.components-form-toggle input.components-form-toggle__input[type="checkbox"] {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	opacity: 0;
	margin: 0;
	padding: 0;
	// Sit above the visual track and thumb so the invisible input receives pointer events.
	z-index: 1;

	// This overrides a border style that is inherited from parent checkbox styles.
	border: none;
	&:checked {
		background: none;
	}

	// Don't show custom checkbox checkmark.
	&::before {
		content: "";
	}

	&:not(:disabled, [aria-disabled="true"]) {
		cursor: var(--wpds-cursor-control);
	}
}