class Colorin

# File lib/colorin.rb, line 61
def self.color_palette
  DEFAULT_COLORS.keys.reject { |c| c.to_s.start_with? 'on_' }.map { |color| "#{Colorin.send "on_#{color}", '    ' }  #{Colorin.send color, color.to_s}" }
end

# File lib/colorin.rb, line 65
def self.custom_color_palette
  CUSTOM_COLORS.keys.map { |color| "#{Colorin.send "on_#{color}", '    ' }  #{Colorin.send color, color.to_s}" }
end

# File lib/colorin.rb, line 53
def hex(hex)
  rgb *hex_to_rgb(hex)
end

# File lib/colorin.rb, line 57
def on_hex(hex)
  on_rgb *hex_to_rgb(hex)
end

# File lib/colorin.rb, line 49
def on_rgb(r, g, b)
  wrap "48;5;#{rgb_to_256(r, g, b)}"
end

# File lib/colorin.rb, line 45
def rgb(r, g, b)
  wrap "38;5;#{rgb_to_256(r, g, b)}"
end

# File lib/colorin.rb, line 75
def hex_to_rgb(hex)
  raise ArgumentError, "Invalid hexadecimal: #{hex}" unless hex.match /[0-9abcdef]{6}/i
  [
    hex[0,2].to_i(16),
    hex[2,2].to_i(16),
    hex[4,2].to_i(16),
  ]
end

# File lib/colorin.rb, line 84
def rgb_to_256(r, g, b)
  raise ArgumentError, "Color out of range (0-255): r: #{r}, g: #{g}, b: #{b}" if [r,g,b].any? { |c| c < 0 || c > 255 }
  red, green, blue = [r, g, b].map { |c| (6 * (c / 256.0)).to_i }
  (red * 36 + green * 6 + blue + 16).abs
end

# File lib/colorin.rb, line 71
def wrap(code)
  Colorin.new "\e[#{code}m#{self}\e[#{STYLES[:clear]}m"
end