module Fog
  module Storage
    class AWS
      module HeadObjectUrl
        def head_object_url(bucket_name, object_name, expires, options = {})
          unless bucket_name
            raise ArgumentError.new('bucket_name is required')
          end
          unless object_name
            raise ArgumentError.new('object_name is required')
          end
          signed_url(options.merge({
            :bucket_name => bucket_name,
            :object_name => object_name,
            :method => 'HEAD'
          }), expires)
        end
      end

      class Real
        # An expiring head request url from S3
        #
        # @param bucket_name [String] Name of bucket containing object
        # @param object_name [String] Name of object to get expiring url for
        # @param expires [Time] An expiry time for this url
        #
        # @return [Excon::Response] response:
        #   * body [String] - url for object
        #
        # @see http://docs.amazonwebservices.com/AmazonS3/latest/dev/S3_QSAuth.html

        include HeadObjectUrl
      end

      class Mock # :nodoc:all
        include HeadObjectUrl
      end
    end
  end
end