class Setting
  class << self
    private
      def instance
        @instance ||= new
      end

      def method_missing(name, *args, &block)
        instance.send(name, *args, &block)
      end
  end

  def initialize(name_or_hash = :application)
    case name_or_hash
    when Hash
      @settings = name_or_hash
    when String, Symbol
      name_or_hash = name_or_hash.to_s
      name_or_hash = "#{name_or_hash}.yml" unless name_or_hash =~ /\.(yml|yaml)$/i
      @settings = YAML.load(File.read("#{RAILS_ROOT}/config/#{name_or_hash}"))
      @settings = @settings[RAILS_ENV] if defined?(RAILS_ENV)
    end
    @settings = @settings.with_indifferent_access
  end

  private
    def method_missing(name, *args, &block)
      if @settings.key?(name)
        case @settings[name]
        when Hash
          self.class.new(@settings[name])
        else
          @settings[name]
        end
      else
        raise NoMethodError.new("no configuration was specified for #{name}")
      end
    end
end