module Vacuum
  # An Amazon locale
  class Locale
    # Amazon hosts
    HOSTS = { :ca => 'ecs.amazonaws.ca',
              :cn => 'webservices.amazon.cn',
              :de => 'ecs.amazonaws.de',
              :es => 'webservices.amazon.es',
              :fr => 'ecs.amazonaws.fr',
              :it => 'webservices.amazon.it',
              :jp => 'ecs.amazonaws.jp',
              :us => 'ecs.amazonaws.com',
              :uk => 'ecs.amazonaws.co.uk' }

    # Country codes for Amazon locales
    LOCALES = HOSTS.keys

    # @return [String] the Amazon Web Services access key
    attr_accessor :key

    # @return [String] the Amazon Web Services secret
    attr_accessor :secret

    # @return [String] the Amazon associate tag
    attr_accessor :tag

    # @param [Symbol] locale the locale key
    # @raise [Vacuum::BadLocale] locale is bad
    def initialize(locale)
      raise BadLocale unless LOCALES.include?(locale)
      @locale = locale
    end

    # @return [String] the Amazon host
    def host
      HOSTS[@locale]
    end
  end
end