@use 'sass:list';
@use 'sass:map';
@use 'src/module/string';
@use 'src/module/color';
@use 'src/module/utilities';
@use 'src/module/elevation/variable/backgrounds';

@mixin background($layer, $options: ()) {
  $legacy: map.get($options, legacy);
  $usage: _usage($options);
  $background: map.get($options, background);

  @if map.has-key(backgrounds.$values, $usage) {
    $tokens: map.get(backgrounds.$values, $usage);
    @if map.has-key($tokens, $layer) {
      @include utilities.nest($background) {
        @include color.background(map.get($tokens, $layer), (legacy: $legacy));
      }
    }
  }
}

@function _usage($options) {
  @if map.has-key($options, usage) {
    $usage: map.get($options, usage);
    @if map.has-key(backgrounds.$values, $usage) {
      @return $usage;
    }
  }
  @return default;
}