module SCSSBeautifier
  class CLI

    def run(args)
      options = Options.new.parse(args)
      generate_configuration and return if options[:generate_config]

      contents = args.first.nil? ? $stdin.read : File.read(args.first)
      engine = Sass::Engine.new(contents, cache: false, syntax: :scss)

      tree = engine.to_tree
      config = Config.new(options[:config])

      config.formatters.each do |formatter|
        formatter.send(:visit, tree)
      end

      output = SCSSBeautifier::Convert.visit(tree, config.options, :scss)
      if options[:in_place]
        File.write(args.first, output)
      else
        puts output
      end
    end

    private

    def generate_configuration
      File.write(".scss-beautifier", File.read(Config::DEFAULT))
    end

  end
end