class Entity

  attr_accessor :components, :server_id

  def initialize(server_id)
    @server_id = server_id
    @components ||= {}
  end

  def acts_as(component_sym, *args)
    # TODO maybe use symbols here
    @components[component_sym] = ObjectSpace.const_get(camelize(component_sym)).new *args
  end

  def acts_as?(component_sym)
    @components.has_key? component_sym
  end

  def use_as(component_sym)
    @components[component_sym]
  end

  def update(passed_time)
    @components.each_value{|v|v.update(passed_time)}
  end

  def behaviors
    @components.keys
  end

  private
  # Ganked this from Inflector:
  def camelize(lower_case_and_underscored_word)
    lower_case_and_underscored_word.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
  end
  # Ganked this from Inflector:
  def underscore(camel_cased_word)
    camel_cased_word.to_s.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z])/,'\1_\2').gsub(/([a-z\d])([A-Z])/,'\1_\2').downcase
  end
end


class Component
  def update(passed_time);end
end


require 'component'
class Movable < Component
  attr_accessor :destination, :moving, :direction

  def moving?()
    @moving
  end
  alias in_motion? moving?
end