// This is the default html and body font-size for the base rem value.
$rem-base: 10px !default;

// IMPORT ONCE
// We use this to prevent styles from being loaded multiple times for compenents that rely on other components.
$modules: () !default;

@mixin exports($name) {
  @if index($modules, $name) == false {
    $modules: append($modules, $name);

    @content;
  }
}

//
// @functions
//

// STRIP UNIT
// It strips the unit of measure and returns it
@function strip-unit($num) {
  @return $num / ($num * 0 + 1);
}

// CONVERT TO REM
@function convert-to-rem($value, $base-value: $rem-base) {
  $value: strip-unit($value) / strip-unit($base-value) * 1rem;

  @if $value == 0rem {
    $value: 0;
  }

  // Turn 0rem into 0
  @return $value;
}

// REM CALC

// New Syntax, allows to optionally calculate on a different base value to counter compounding effect of rem's.
// Call with 1, 2, 3 or 4 parameters, 'px' is not required but supported:
//
//   rem-calc(10 20 30px 40);
//
// Space delimited, if you want to delimit using comma's, wrap it in another pair of brackets
//
//   rem-calc((10, 20, 30, 40px));
//
// Optionally call with a different base (eg: 8px) to calculate rem.
//
//   rem-calc(16px 32px 48px, 8px);
//
// If you require to comma separate your list
//
//   rem-calc((16px, 32px, 48), 8px);

@function rem-calc($values, $base-value: $rem-base) {
  $max: length($values);

  @if $max == 1 {
    @return convert-to-rem(nth($values, 1), $base-value);
  }

  $remValues: ();

  @for $i from 1 through $max {
    $remValues: append($remValues, convert-to-rem(nth($values, $i), $base-value));
  }

  @return $remValues;
}
