unless Fog.mocking?

  module Fog
    module AWS
      class S3

        # Copy an object from one S3 bucket to another
        #
        # ==== Parameters
        # * source_bucket_name<~String> - Name of source bucket
        # * source_object_name<~String> - Name of source object
        # * target_bucket_name<~String> - Name of bucket to create copy in
        # * target_object_name<~String> - Name for new copy of object
        # * options<~Hash>:
        #   * 'x-amz-metadata-directive'<~String> - Specifies whether to copy metadata from source or replace with data in request.  Must be in ['COPY', 'REPLACE']
        #   * 'x-amz-copy_source-if-match'<~String> - Copies object if its etag matches this value
        #   * 'x-amz-copy_source-if-modified_since'<~Time> - Copies object it it has been modified since this time
        #   * 'x-amz-copy_source-if-none-match'<~String> - Copies object if its etag does not match this value
        #   * 'x-amz-copy_source-if-unmodified-since'<~Time> - Copies object it it has not been modified since this time
        #
        # ==== Returns
        # * response<~Fog::AWS::Response>:
        #   * body<~Hash>:
        #     * 'ETag'<~String> - etag of new object
        #     * 'LastModified'<~Time> - date object was last modified
        #
        # TODO: allow specifying new metadata (support all/some of put_object?)
        def copy_object(source_bucket_name, source_object_name, target_bucket_name, target_object_name, options = {})
          headers = { 'x-amz-copy-source' => "/#{source_bucket_name}/#{source_object_name}" }.merge!(options)
          request({
            :expects  => 200,
            :headers  => headers,
            :host     => "#{target_bucket_name}.#{@host}",
            :method   => 'PUT',
            :parser   => Fog::Parsers::AWS::S3::CopyObject.new,
            :path     => target_object_name
          })
        end

      end
    end
  end

else

  module Fog
    module AWS
      class S3

        def copy_object(source_bucket_name, source_object_name, target_bucket_name, target_object_name, options = {})
          response = Fog::Response.new
          source_bucket = @data[:buckets][source_bucket_name]
          source_object = source_bucket && source_bucket[:objects][source_object_name]
          target_bucket = @data[:buckets][target_bucket_name]

          if source_object && target_bucket
            response.status = 200
            target_object = source_object.dup
            target_object.merge!({
              'ETag' => Fog::AWS::Mock.etag,
              'Name' => target_object_name
            })
            target_bucket[:objects][target_object_name] = target_object
            response.body = {
              'ETag'          => target_object['ETag'],
              'LastModified'  => Time.parse(target_object['LastModified'])
            }
          else
            response.status = 404
            raise(Fog::Errors.status_error(200, 404, response))
          end

          response
        end

      end
    end
  end

end