conditional($var, $values...)
  $result = ''

  // If there is only an array passed, use its contents
  if length($values) == 1
    $values = $values[0]

  // Validating the values and check if we need to do anything at all
  $type = null
  $equal = true

  for $value, $i in $values
    if $i > 0 and $value != $values[0]
      $equal = false

    $value_type = typeof($value)
    $type = $type || $value_type
    if !($type == 'unit' or $type == 'rgba')
      error('Conditional function can accept only numbers or colors')

    if $type != $value_type
      error('Conditional function can accept only same type values')

  // If all the values are equal, just return one of them
  if $equal
    return $values[0]

  // Handling numbers
  if $type == 'unit'
    $result = 'calc('
    $i_count = 0
    for $value, $i in $values
      $multiplier = ''
      $modifier = 1
      $j_count = 0
      for $j in 0..(length($values) - 1)
        if $j != $i
          $j_count = $j_count + 1
          // We could use just the general multiplier,
          // but for 0 and 1 we can simplify it a bit.
          if $j == 0
            $modifier = $modifier * $i
            $multiplier = $multiplier + $var
          else if $j == 1
            $modifier = $modifier * ($j - $i)
            $multiplier = $multiplier + '(1 - ' + $var + ')'
          else
            $modifier = $modifier * ($i - $j)
            $multiplier = $multiplier + '(' + $var + ' - ' + $j + ')'

          if $j_count < length($values) - 1
            $multiplier = $multiplier + ' * '

      // If value is zero, just don't add it there lol
      if $value != 0
        if $modifier != 1
          $multiplier = $multiplier + ' * ' + (1 / $modifier)
        $result = $result + ($i_count > 0 ? ' + ' : '') + $value + ' * ' + $multiplier
        $i_count = $i_count + 1

    $result = $result + ')'

  // Handling colors
  if $type == 'rgba'
    $hues = ()
    $saturations = ()
    $lightnesses = ()
    $alphas = ()

    for $value in $values
      push($hues, unit(hue($value), ''))
      push($saturations, saturation($value))
      push($lightnesses, lightness($value))
      push($alphas, alpha($value))

    $result = 'hsla(' + conditional($var, $hues) + ', ' + conditional($var, $saturations) + ', ' + conditional($var, $lightnesses) + ', ' + conditional($var, $alphas) +  ')'

  return unquote($result)

.test
  border: solid
  margin: 20px

.test_foo
  border-width: conditional(var(--foo), 10px, 20px)
  border-color: red
  @supports (color:unquote('rgb(0,calc(0),0)'))
    border-color: conditional(var(--foo), red, lime)

.test_bar
  border-width: conditional(var(--bar), 10px, 30px, 40px)
  border-color: blue
  @supports (color:unquote('rgb(0,calc(0),0)'))
    border-color: conditional(var(--bar), red, lime, rebeccapurple, orange)