@import '../../settings/rem';

@function char($iso-char) {
  @return unquote('"\\e#{$iso-char}"');
}

$modules: () !default;

@mixin exports($name) {
  // Import from global scope
  $modules: $modules;
  // Check if a module is already on the list
  $module_index: index($modules, $name);

  @if (($module_index == null) or ($module_index == false)) {
    $modules: append($modules, $name);

    @content;
  }
}

//===============================================
// VARS
//===============================================
// rem base value (16px)
//$rem-base: $rem-base;

// base unit in rems
//$base-rem: rem-calc($rem-base) / 2;

// 6 = (6 x base unit)
//$base-scale: 6;

// this value has to be adjusted to the font used or 0 to use line-height
//$base-line-height: $base-rem * $base-scale / 1rem;

// calculate base unit from scale, and rem base (4)
//$base-unit: $base-line-height / $base-scale * $rem-base;

//===============================================
// FUNCTIONS
//===============================================

// convert px to em
@function em($px: 0, $font-size: $rem-base) {
  @return $px / $font-size + em;
}

// convert unitless or px to rem
@function rem($val) {
  @if unit($val) == 'px' or unitless($val) {
    @return rem-calc($val);
  } @else if unit($val) == 'rem' {
    @return $val;
  } @else {
    @warn '`#{$val}` is not a supported try a px or rem value';

    @return false;
  }
}

// convert rem to px
@function px($val, $base: $rem-base) {
  @if unitless($val) {
    @return $val * 1px;
  }

  @if unit($val) == 'px' {
    @return $val;
  } @else if unit($val) == 'rem' {
    @return $val * $base / 1rem;
  } @else {
    @warn '`#{$val}` is not a supported try a px or rem value';

    @return false;
  }
}

// find the nearest ceiling rem value to a baseline unit
@function vr-adjust($val: 1px, $remove: 0px, $base-unit: rem($base-unit)) {
  @return ceil(rem($val) / $base-unit) * $base-unit - rem($remove);
}

// round to the nearest specified number
@function round-to($val, $unit: $base-unit) {
  @return round($val / $unit) * $unit;
}

@function lower-bound($range) {
  @if length($range) <= 0 {
    @return 0;
  }

  @return nth($range, 1);
}

@function upper-bound($range) {
  @if length($range) < 2 {
    @return 999999999999;
  }

  @return nth($range, 2);
}

@function strip-unit($num) {
  @return $num / ($num * 0 + 1);
}

@function text-inputs($types: all, $selector: input) {
  $return: ();

  $all-text-input-types: text password date datetime datetime-local month week
    email number search tel time url color textarea;

  @if $types == all {
    $types: $all-text-input-types;
  }

  @each $type in $types {
    @if $type == textarea {
      @if $selector == input {
        $return: append($return, unquote('#{$type}'), comma);
      } @else {
        $return: append($return, unquote('#{$type}#{$selector}'), comma);
      }
    } @else {
      $return: append($return, unquote('#{$selector}[type="#{$type}"]'), comma);
    }
  }

  @return $return;
}

@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;
}

@function data($attr) {
  @return '[data-' + $attr + ']';
}

@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;
}

@function em-calc($values) {
  $remValues: rem-calc($values);

  $max: length($remValues);

  @if $max == 1 {
    @return strip-unit(nth($remValues, 1)) * 1em;
  }

  $emValues: ();

  @for $i from 1 through $max {
    $emValues: append($emValues, strip-unit(nth($remValues, $i)) * 1em);
  }

  @return $emValues;
}