@charset 'UTF-8';

////
/// Flavor SCSS Mixins Text
/// @group mixins-text
/// @author blackmirror1980
////

/// Text shadow modes
///
/// @access private
/// @type list
$text-shadow-modes: array-concat((none), $css-default-modes);

/// Checks if something is text shadow mode
///
/// @access public
/// @param {string} $tsm - the text-shadow mode
/// @return {boolean} - true if is text-shadow mode
@function is-text-shadow-mode($tsm) {
  @return is-defined($tsm) and array-contains($text-shadow-modes, $tsm);
}

/// Checks if something is text shadow value
///
/// @access public
/// @param {any} $text-shadow - the text-shadow value
/// @return {boolean} - true if is text-shadow value
@function is-text-shadow($text-shadow) {
  @if is-defined($text-shadow) {
    @if is-text-shadow-mode($text-shadow) {
      @return true;
    }
    @else {
      // $defaults: (h-offset: 0, v-offset: 0, blur: 0, spread: 0, color: transparent, inset: null);
      // TODO: add spread & inset support when available
      $defaults: (h-offset: 0, v-offset: 0, blur: 0, color: transparent);

      @if is-object($text-shadow) {
        $text-shadow: extend($defaults, $text-shadow);
      }
      @else {
        $text-shadow-h-offset: nth-value($text-shadow, 1);
        $text-shadow-v-offset: nth-value($text-shadow, 2);
        $text-shadow-blur: nth-value($text-shadow, 3);
        $text-shadow-color: nth-value($text-shadow, 4);
        // $text-shadow-spread: nth-value($text-shadow, 4);
        // $text-shadow-color: nth-value($text-shadow, 5);
        // $text-shadow-inset: nth-value($text-shadow, 6);

        $text-shadow: extend($defaults, ());

        @if is-defined($text-shadow-h-offset) {
          $text-shadow: extend($text-shadow, (h-offset: $text-shadow-h-offset));
        }

        @if is-defined($text-shadow-v-offset) {
          $text-shadow: extend($text-shadow, (v-offset: $text-shadow-v-offset));
        }

        @if is-defined($text-shadow-blur) {
          $text-shadow: extend($text-shadow, (blur: $text-shadow-blur));
        }

        // @if is-defined($text-shadow-spread) {
        //   $text-shadow: extend($text-shadow, (spread: $text-shadow-spread));
        // }

        @if is-defined($text-shadow-color) {
          $text-shadow: extend($text-shadow, (color: $text-shadow-color));
        }

        // @if is-defined($text-shadow-inset) {
        //   $text-shadow: extend($text-shadow, (inset: $text-shadow-inset));
        // }
      }

      $is-text-shadow-valid: true;

      $text-shadow-h-offset: get($text-shadow, h-offset);

      @if not is-length($text-shadow-h-offset) {
        $is-text-shadow-valid: false;

        @warn '`text-shadow h-offset: #{$text-shadow-h-offset}` is not a valid css length value';
      }

      $text-shadow-v-offset: get($text-shadow, v-offset);

      @if $is-text-shadow-valid {
        @if not is-length($text-shadow-v-offset) {
          $is-text-shadow-valid: false;

          @warn '`text-shadow v-offset: #{$text-shadow-v-offset}` is not a valid css length value';
        }
      }

      $text-shadow-blur: get($text-shadow, blur);

      @if $is-text-shadow-valid {
        @if not is-length($text-shadow-blur) {
          $is-text-shadow-valid: false;

          @warn '`text-shadow blur: #{$text-shadow-blur}` is not a valid css length value';
        }
      }

      // $text-shadow-spread: get($text-shadow, spread);

      // @if $is-text-shadow-valid {
      //   @if not is-length($text-shadow-spread) {
      //     $is-text-shadow-valid: false;

      //     @warn '`text-shadow spread: #{$text-shadow-spread}` is not a valid css length value';
      //   }
      // }

      $text-shadow-color: get($text-shadow, color);

      @if $is-text-shadow-valid {
        @if not is-css-color($text-shadow-color) {
          $is-text-shadow-valid: false;

          @warn '`text-shadow color: #{$text-shadow-color}` is not a valid css color value';
        }
      }

      // $text-shadow-inset: get($text-shadow, inset);

      // @if $is-text-shadow-valid {
      //   @if is-string($text-shadow-inset) and $text-shadow-inset !=inset {
      //     $is-text-shadow-valid: false;

      //     @warn '`text-shadow inset: #{$text-shadow-inset}` is not a valid css inset value';
      //   }
      // }

      @return $is-text-shadow-valid;
    }
  }

  @return false;
}

/// Checks if a list is a text-shadow values list (e.g. `0 2px 0 #dcffa6, 0 2px 5px #000`)
///
/// @access public
/// @param {array | list} $text-shadows - the text-shadow values list
/// @return {boolean} - true if is text-shadow values list
@function is-text-shadows($text-shadows) {
  @if is-defined($text-shadows) {
    $is-text-shadows-valid: true;

    @each $text-shadow in $text-shadows {
      @if $is-text-shadows-valid {
        $is-text-shadows-valid: is-text-shadow($text-shadow);
      }
    }

    @return $is-text-shadows-valid;
  }

  @return false;
}

/// Text shadow mixin
///
/// @example scss - Usage
///   .text-shadow-element {
///     @include text-shadow(0 2px 0 #dcffa6, 0 2px 5px #000);
///   }
///
/// @example css - Output
///   .text-shadow-element {
///     -webkit-text-shadow: 0 2px 0 #dcffa6, 0 2px 5px #000;
///     -moz-text-shadow: 0 2px 0 #dcffa6, 0 2px 5px #000;
///     -ms-text-shadow: 0 2px 0 #dcffa6, 0 2px 5px #000;
///     -o-text-shadow: 0 2px 0 #dcffa6, 0 2px 5px #000;
///     text-shadow: 0 2px 0 #dcffa6, 0 2px 5px #000;
///   }
/// @access public
/// @param {shadow} $text-shadows... - the text shadows list
@mixin text-shadow($text-shadows...) {
  @if list-separator($text-shadows) != comma {
    $text-shadows: ($text-shadows,);
  }

  @if is-text-shadows($text-shadows) {
    @include prefixer(text-shadow, $text-shadows);
  }
  @else {
    @warn '`text-shadow: #{$text-shadows}` one or more are not valid css text-shadow values';
  }
}