@use 'sass:map';
@use 'sass:list';
@use 'sass:math';
@use 'functions' as *;

// Check ascending order
// Used to ensure the breakpoints are ordered ascending.
@mixin assert-ascending($map, $map-name) {
	$prev-key: null;
	$prev-num: null;

	@each $key, $num in $map {
		@if not $prev-num or math.unit($num) == '%' {
			// Do nothing
		} @else if not compatible($prev-num, $num) {
			@warn "Potentially invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} whose unit makes it incomparable to #{$prev-num}, the value of the previous key '#{$prev-key}' !";
		} @else if $prev-num >= $num {
			@warn "Invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} which isn't greater than #{$prev-num}, the value of the previous key '#{$prev-key}' !";
		}

		$prev-key: $key;
		$prev-num: $num;
	}
}

// Starts at zero
// Used to ensure the min-width of the lowest breakpoint starts at 0.
@mixin assert-starts-at-zero($map, $map-name: '$grid-breakpoints') {
	$values: map.values($map);
	$first-value: list.nth($values, 1);

	@if $first-value != 0 {
		@warn "First breakpoint in #{$map-name} must start at 0, but starts at #{$first-value}.";
	}
}