module Fog
  module Storage
    class AWS
      class Real
        # Upload a part for a multipart upload
        #
        # @param bucket_name [String] Name of bucket to add part to
        # @param object_name [String] Name of object to add part to
        # @param upload_id [String] Id of upload to add part to
        # @param part_number [String] Index of part in upload
        # @param data [File||String] Content for part
        # @param options [Hash]
        # @option options Content-MD5 [String] Base64 encoded 128-bit MD5 digest of message
        #
        # @return [Excon::Response] response
        #   * headers [Hash]:
        #     * ETag [String] etag of new object (will be needed to complete upload)
        #
        # @see http://docs.amazonwebservices.com/AmazonS3/latest/API/mpUploadUploadPart.html
        #
        def upload_part(bucket_name, object_name, upload_id, part_number, data, options = {})
          data = Fog::Storage.parse_data(data)
          headers = options
          headers['Content-Length'] = data[:headers]['Content-Length']
          request({
            :body       => data[:body],
            :expects    => 200,
            :idempotent => true,
            :headers    => headers,
            :bucket_name => bucket_name,
            :object_name => object_name,
            :method     => 'PUT',
            :query      => {'uploadId' => upload_id, 'partNumber' => part_number}
          })
        end
      end # Real

      class Mock # :nodoc:all
        require 'fog/aws/requests/storage/shared_mock_methods'
        include Fog::Storage::AWS::SharedMockMethods

        def upload_part(bucket_name, object_name, upload_id, part_number, data, options = {})
          data = parse_mock_data(data)
          verify_mock_bucket_exists(bucket_name)
          upload_info = get_upload_info(bucket_name, upload_id)
          upload_info[:parts][part_number] = data[:body]

          response = Excon::Response.new
          response.status = 200
          # just use the part number as the ETag, for simplicity
          response.headers["ETag"] = part_number.to_s
          response
        end
      end # Mock
    end # Storage
  end # AWS
end # Fog