/**
 * Requires
 */
@use "sass:list";
@use "sass:math";
@use "sass:meta";
@use "sass:string";

/**
 * Generate spacing values with a base
 * @param {string|number} $base - Base size including unit or variable
 * @param {number} $spaces - 1-4 values, unitless used for multiplication
 * @return {list} - Spacing values list
 */
@function spacing($params...) {
  @if list.length($params) == 0 {
    @error 'spacing::$args must supply at least one unitless number';
  }
  $base: 'var(--ui-spacing-base)';
  $values: ();
  $i: 0;
  @each $param in $params {
    @if $i == 0 {
      @if meta.type-of($param) == string {
        $base: $param;
      } @else if meta.type-of($param) == number {
        @if math.is-unitless($param) {
          @if $param == 0 {
            $values: list.append($values, 0);
          } @else {
            $values: list.append($values, string.unquote('calc(#{$base} * #{$param})'));
          }
        } @else {
          $base: $param;
        }
      } @else {
        @error 'spacing::$arg[#{$i}] must be a string or number, number can be unitless';
      }
    } @else {
      @if meta.type-of($param) == number and math.is-unitless($param) {
        @if $param == 0 {
          $values: list.append($values, 0);
        } @else {
          $values: list.append($values, string.unquote('calc(#{$base} * #{$param})'));
        }
      } @else {
        @error 'spacing::$arg[#{$i}] must be unitless number';
      }
    }
    $i: $i + 1;
  }
  @return $values;
}