@use "sass:map";
@use "sass:list";
@use "helper";

$--gaps: () !default;

@mixin define-gap($name, $gap, $iterable: true) {
    $name: helper.string-of($name, "define-gap", "name");
    $gap: helper.number-of($gap, "define-gap", "gap");
    $iterable: helper.bool-of($iterable, "define-gap", "iterable");
    $--gaps: map.merge($--gaps, helper.map-from($name, $gap $iterable)) !global;
}

@function gap($name) {
    $name: helper.string-of($name, "gap", "name");
    @if map.has-key($--gaps, $name) {
        @return list.nth(map.get($--gaps, $name), 1);
    }
    @error "#{$name} gap not found!";
}

@function gaps($includes: ()) {
    $includes: helper.list-of($includes, "gaps", "includes");
    $res: ();
    @each $k, $v in $--gaps {
        @if list.index($includes, $k) != null or list.nth($v, 2) == true {
            $res: map.merge($res, helper.map-from($k, list.nth($v, 1)));
        }
    }
    @return $res;
}