// Grid Layout System
//
// This mixin provides a responsive CSS Grid layout system with different configurations
// for mobile, tablet, desktop and desktop-wide screen sizes.
//
// The Grid consists of:
// - Mobile: 4 columns, 16px gutters, 16px margins
// - Tablet: 8 columns, 24px gutters, 24px margins
// - Desktop: 24 columns, 24px gutters, 32px margins, max content width 1596px
// - Desktop-wide: 24 columns, 24px gutters, responsive margins, max content width 1596px
//
// Example usage:
//
// .my-grid-container {
//     .cdx-mixin-grid-container();
// }
//
// .my-grid-item {
//     // Span 6 columns on desktop, 4 on tablet, 2 on mobile.
//     .cdx-mixin-grid-item( 6, 4, 2 );
// }

// Variables for different viewport sizes
// @min-width-breakpoint-desktop-wide equals to 1680px.
// @min-width-breakpoint-desktop equals to 1120px.
// @min-width-breakpoint-tablet equals to 640px.
// TODO: Define if this should be set in Codex and to what value as it seems to be skin specific.
@max-width-grid-content: 99.75rem; // equals to 1596px.

// Container mixin - creates the Grid container.
// Only parametrize the row gap as column gap would mean that downstream consumers could
// directly break out of Grid, leading too easily to unwanted inconsistencies.
// @param {string} gap-row is the row gap.
// @param {string} gap-multiplier is a multiplying the gaps on larger screens (tablet and up).
.cdx-mixin-grid-container( @param-gap-row: @spacing-100; @param-gap-multiplier: 1.5 ) {
	display: grid;
	// Mobile layout (default).
	// TODO: Turn into design token.
	grid-template-columns: repeat( 4, 1fr );
	// Grid `gap` for columns and rows.
	gap: @param-gap-row @spacing-100;
	box-sizing: @box-sizing-base;
	width: @size-full;
	// Mobile layout (default) continuation.
	padding-right: @spacing-100;
	padding-left: @spacing-100;

	// Tablet layout.
	@media ( min-width: @min-width-breakpoint-tablet ) {
		grid-template-columns: repeat( 8, 1fr );
		gap: calc( @param-gap-row * @param-gap-multiplier ) @spacing-150;
		padding-right: @spacing-150;
		padding-left: @spacing-150;
	}

	// Desktop layout.
	@media ( min-width: @min-width-breakpoint-desktop ) {
		grid-template-columns: repeat( 24, 1fr );
		gap: calc( @param-gap-row * @param-gap-multiplier ) @spacing-150;
		max-width: @max-width-grid-content;
		margin: 0 auto;
		padding-right: @spacing-200;
		padding-left: @spacing-200;
	}

	// Desktop wide layout.
	@media ( min-width: @min-width-breakpoint-desktop-wide ) {
		padding-right: calc( ( @size-full - @max-width-grid-content ) / 2 );
		padding-left: calc( ( @size-full - @max-width-grid-content ) / 2 );
	}
}

// Grid item mixin - defines how many columns an item spans at different screen sizes.
// @param {number} col-span-desktop - Number of columns to span on desktop (out of 24)
// @param {number} col-span-tablet - Number of columns to span on tablet (out of 8)
// @param {number} col-span-mobile - Number of columns to span on mobile (out of 4)
.cdx-mixin-grid-item( @col-span-desktop: 24, @col-span-tablet: 8, @col-span-mobile: 4 ) {
	// Mobile layout (default).
	// TODO: See if we can workaround the not completely and fully supported `min()` function.
	// The browsers not supporting it are falling out of basic support in coming months, nonetheless
	// present rules.
	/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
	grid-column: span min( @col-span-mobile, 4 );

	// Tablet layout.
	@media ( min-width: @min-width-breakpoint-tablet ) {
		/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
		grid-column: span min( @col-span-tablet, 8 );
	}

	// Desktop layout.
	@media ( min-width: @min-width-breakpoint-desktop ) {
		/* stylelint-disable-next-line plugin/no-unsupported-browser-features */
		grid-column: span min( @col-span-desktop, 24 );
	}
}

// Full-width Grid item mixin (spans all available columns)
.cdx-mixin-grid-item-full() {
	grid-column: 1 / -1;
}

// Start-end position mixin - allows precise column positioning.
//
// This mixin provides fine-grained control over Grid item placement across different screen sizes.
// Unlike the `.cdx-mixin-grid-item()` which uses `<span>` element, this mixin gives explicit
// control over both start and end positions of the Grid item.
//
// For each viewport size, specify:
// - Where the item begins (start column number)
// - Where the item ends (end column number)
//
// Important notes:
// - Column counting begins at 1 (not 0)
// - End position is exclusive (it's the position AFTER the last column you want to include)
// - The total number of columns varies by viewport: Mobile (4), Tablet (8), Desktop (24)
//
// Example usage:
//
// .sidebar {
//     // On desktop: columns 1-6 (spans first 6 columns)
//     // On tablet: columns 1-3 (spans first 3 columns)
//     // On mobile: columns 1-4 (full width)
//     .cdx-mixin-grid-position( 1, 7, 1, 4, 1, 5 );
// }
//
// .main-content {
//     // On desktop: columns 7-24 (spans remaining 18 columns)
//     // On tablet: columns 4-9 (spans remaining 5 columns)
//     // On mobile: full width in a new row (handled by layout)
//     .cdx-mixin-grid-position( 7, 25, 4, 9, 1, 5 );
// }
//
// @param {number} col-desktop-start - Starting column for desktop viewports (1-24)
// @param {number} col-desktop-end - Ending column for desktop viewports (2-25)
// @param {number} col-tablet-start - Starting column for tablet viewports (1-8)
// @param {number} col-tablet-end - Ending column for tablet viewports (2-9)
// @param {number} col-mobile-start - Starting column for mobile viewports (1-4)
// @param {number} col-mobile-end - Ending column for mobile viewports (2-5)
/* stylelint-disable @stylistic/indentation */
.cdx-mixin-grid-position(
	@param-col-desktop-start: 1,
	@param-col-desktop-end: 25,
	@param-col-tablet-start: 1,
	@param-col-tablet-end: 9,
	@param-col-mobile-start: 1,
	@param-col-mobile-end: 5
) {
	// Mobile layout (default).
	// `~'/'` is used to concatenate the start and end column numbers for Less compiler.
	grid-column: @param-col-mobile-start ~'/' @param-col-mobile-end;

	// Tablet layout.
	@media ( min-width: @min-width-breakpoint-tablet ) {
		grid-column: @param-col-tablet-start ~'/' @param-col-tablet-end;
	}

	// Desktop layout.
	@media ( min-width: @min-width-breakpoint-desktop ) {
		grid-column: @param-col-desktop-start ~'/' @param-col-desktop-end;
	}
}
/* stylelint-enable @stylistic/indentation */