@import "call-once";
@import "colors";

$cx-include-all: true !default;

$cx-excluded: () !default;
$cx-used: null !default;

$cx-dependencies: () !default;

@function cx-should-include($name, $once: true) {
   @return (
       (map-get($cx-excluded, $name) != true) and
       ($cx-include-all or
       ($cx-used != null and map-get($cx-used, $name) == true))
   )
   and ($once != true or cx-call-once($name));
}

@function cx-included($name) {
   @return cx-called-once($name);
}

@function cx-widget($name) {
   @if (map-get($cx-excluded, $name)) {
      @return 0;
   }
   $cx-used: map_merge($cx-used, ($name: true)) !global;
   $dummy: 1;
   $deps: map-get($cx-dependencies, $name);
   @if ($deps == null) {
      @return 0;
   }
   @each $dep in $deps {
      $dummy: cx-widget($dep);
   }
   @return $dummy;
}

@mixin cx-widgets($names...) {
   $dummy: 1;
   $cx-used: () !default !global;

   @each $name in $names {
      $dummy: cx-widget($name)
   }
}