class RgbaPng

# File lib/rgba_png.rb, line 50
def self.create_files(colors, destination)
  colors.uniq.each do |color|
    bg = ChunkyPNG::Color.rgba(color[:r], color[:g], color[:b], color[:a])
    png = ChunkyPNG::Image.new(16, 16, bg)

    unless Dir.exists? destination
      Dir.mkdir destination
    end

    png.save(destination + '/' + (file_name(color) + '.png'), interlace: true)
  end
end

# File lib/rgba_png.rb, line 42
def self.file_name(color)
  # Convert the alpha to 0-1 range
  alpha = (color[:a] / 255.to_f).round(1)

  color[:r].to_s + '-' + color[:g].to_s + '-' + color[:b].to_s + '-' + alpha.to_s
end

# File lib/rgba_png.rb, line 5
def self.init(file, destination)
  if !file || !destination
    puts 'Usage: rgba-png sourcefile destination'

    return
  end

  colors = parse(file)
  create_files colors, destination

  puts colors.uniq.length.to_s + ' image(s) created!'
end

# File lib/rgba_png.rb, line 19
def self.parse(file)
  colors = []
  rgba = /rgba\((\d+),(\d+),(\d+),(\d?.\d+)\)/

  IO.foreach(file) do |line|
    is_rgba = line.match rgba

    if is_rgba
      color = {
          r: is_rgba[1].to_i,
          g: is_rgba[2].to_i,
          b: is_rgba[3].to_i,
          a: (is_rgba[4].to_f * 255).to_i # Convert alpha value to 0-255 range
      }

      colors.push(color)
    end
  end

  colors
end