module GoggleBox
  # require 'httparty'

  module TVRage
    class Show
      def self.search opts={}
        "searching TVRage for shows with options #{opts.inspect}"
      end
    end
  end

  module TheTVDB
    class Show
      def self.search opts={}
        "searching TheTVDB for shows with options #{opts.inspect}"
      end
    end
  end

  class << self
    attr_writer :adapter
    def adapter
      @adapter ||= GoggleBox::TVRage
    end
  end

  # Bit o' metaprogramming magic to invoke the right class on the adapter
  # Raises a normal NameError if the constant is missing
  def self.const_missing klass
    GoggleBox::adapter.const_get(klass)
  end

end

GoggleBox.adapter # => GoggleBox::TVRage
GoggleBox::Show.search :title => "foo" # => "searching TVRage for shows with options {:title=>\"foo\"}"

GoggleBox.adapter = GoggleBox::TheTVDB
GoggleBox.adapter # => GoggleBox::TheTVDB
GoggleBox::Show.search :title => "foo" # => "searching TheTVDB for shows with options {:title=>\"foo\"}"