/**
 * Check if the passed value is of a certain type
 *
 * Here's the available types that you can check
 * - mixed => mean anything
 * - null
 * - url
 * - px
 * - pt
 * - rem
 * - em
 * - percent | %
 * - vw
 * - vh
 * - ex
 * - ch
 * - cm
 * - mm
 * - in
 * - pc
 * - s | second
 * - boolean | bool
 * - function
 * - number
 * - int | integer
 * - string
 * - color
 * - list
 * - map
 * - deg | degree
 * - list-{type} => check if is a list of the specified type
 * - map-{type} => check if is a map of the specified type
 *
 * @param 			{Mixed} 			$value 			The value to check
 * @param 			{String} 			$type 			The type to check
 * @return 			{Boolean} 							true if match the type, false if not
 *
 * @example
 * s-is(hello, string) // => true
 * s-is('hello', string) // => true
 * s-is(#fff, color) // => true
 * s-is(hello #fff, list-color) // => false
 * s-is(#fff #ddd, list-color) // => true
 * // etc...
 *
 * @author 			Olivier Bossel <olivier.bossel@gmail.com> (https://olivierbossel.com)
 */
@function s-is($value, $type) {
  @if type-of($type) == string and str-index($type, "|") {
    $type: _split($type, "|");
  }

  @if type-of($type) == list {
    $ok: false;
    @each $t in $type {
      @if s-is($value, $t) {
        $ok: true;
      }
    }
    @return $ok;
  } @else {
    @if $type == mixed {
      @return true;
    } @else if $type == null or $type == "null" {
      @return _is-null($value);
    } @else if $type == url {
      @return str-is-url($value);
    } @else if str-index($type, "map-") {
      $idx: str-index($type, "-");
      $type: str-slice($type, $idx + 1);
      @each $prop, $val in $value {
        @if $val and not s-is($val, $type) {
          @return false;
        }
      }
      @return true;
    } @else if str-index($type, "list-") {
      $idx: str-index($type, "-");
      $type: str-slice($type, $idx + 1);
      @each $item in $value {
        @if $item and not s-is($item, $type) {
          @return false;
        }
      }
      @return true;
    } @else if $type == px {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == px;
    } @else if $type == rem {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == rem;
    } @else if $type == em {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == em;
    } @else if $type == pt {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == pt;
    } @else if $type == percent or $type == "%" {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == "%";
    } @else if $type == vw {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == vw;
    } @else if $type == vh {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == vh;
    } @else if $type == ex {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == ex;
    } @else if $type == ch {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == ch;
    } @else if $type == cm {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == cm;
    } @else if $type == mm {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == mm;
    } @else if $type == in {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == in;
    } @else if $type == pc {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == pc;
    } @else if $type == s or $type == second {
      @return type-of($value) == number and not unitless($value) and
        unit($value) == s;
    } @else if $type == boolean or $type == bool {
      @return _is-boolean($value);
    } @else if $type == function {
      @return _is-function($value);
    } @else if $type == number {
      @return type-of($value) == number;
    } @else if $type == integer or $type == int {
      @if type-of($value) != number {
        @return false;
      }
      @return round($value) == $value;
    } @else if $type == string {
      @return type-of($value) == string;
    } @else if $type == color {
      @return type-of($value) == color;
    } @else if $type == list {
      @return type-of($value) == list;
    } @else if $type == map {
      @return type-of($value) == map;
    } @else if $type == degree or $type == deg {
      @return unit($value) == deg;
    }
  }
  // default return
  @return false;
}