module Sass::Value::Color::Space::Utils

def lab_to_lch(dest, lightness, a, b, alpha, # rubocop:disable Naming/MethodParameterName
               missing_chroma: false, missing_hue: false)
  chroma = Math.sqrt(((a.nil? ? 0 : a)**2) + ((b.nil? ? 0 : b)**2))
  hue = if missing_hue || FuzzyMath.equals(chroma, 0)
          nil
        else
          Math.atan2(b.nil? ? 0 : b, a.nil? ? 0 : a) * 180 / Math::PI
        end
  Color.send(
    :for_space_internal,
    dest,
    lightness,
    missing_chroma ? nil : chroma,
    hue.nil? || hue >= 0 ? hue : hue + 360,
    alpha
  )
end

def srgb_and_display_p3_from_linear(channel)
  abs = channel.abs
  abs <= 0.0031308 ? channel * 12.92 : (channel <=> 0) * ((1.055 * (abs**(1 / 2.4))) - 0.055)
end

def srgb_and_display_p3_to_linear(channel)
  abs = channel.abs
  abs <= 0.04045 ? channel / 12.92 : (channel <=> 0) * (((abs + 0.055) / 1.055)**2.4)
end