class Faker::Color

def color_name
  fetch('color.name')
end

def hex_color(args = nil)
  hsl_hash = {}
  hsl_hash = { lightness: LIGHTNESS_LOOKUP[args] } if %i[dark light].include?(args)
  hsl_hash = args if args.is_a?(Hash)
  hsl_to_hex(hsl_color(**hsl_hash))
end

def hsl_color(hue: nil, saturation: nil, lightness: nil)
  valid_hue = hue || sample((0..360).to_a)
  valid_saturation = saturation&.clamp(0, 1) || rand.round(2)
  valid_lightness = lightness&.clamp(0, 1) || rand.round(2)
  [valid_hue, valid_saturation, valid_lightness]
end

def hsl_to_hex(a_hsl_color)
  h, s, l = a_hsl_color
  c = (1 - (2 * l - 1).abs) * s
  h_prime = h / 60
  x = c * (1 - (h_prime % 2 - 1).abs)
  m = l - 0.5 * c
  rgb = case h_prime.to_i
        when 0 # 0 <= H' < 1
          [c, x, 0]
        when 1 # 1 <= H' < 2
          [x, c, 0]
        when 2 # 2 <= H' < 3
          [0, c, x]
        when 3 # 3 <= H' < 4
          [0, x, c]
        when 4 # 4 <= H' < 5
          [x, 0, c]
        else # 5 <= H' < 6
          [c, 0, x]
        end.map { |value| ((value + m) * 255).round }
  format('#%02x%02x%02x', rgb[0], rgb[1], rgb[2])
end

def hsla_color
  hsl_color << rand.round(1)
end

def rgb_color
  Array.new(3) { single_rgb_color }
end

def single_rgb_color
  sample((0..255).to_a)
end