module Fog
  module HP
    class Storage
      class Real

        # Get details for an object
        #
        # ==== Parameters
        # * container<~String> - Name of container to look in
        # * object<~String> - Name of object to look for
        #
        def get_object(container, object, &block)
          response = request({
            :block    => block,
            :expects  => 200,
            :method   => 'GET',
            :path     => "#{escape_name(container)}/#{escape_name(object)}"
          }, false, &block)
          response
        end

      end

      class Mock # :nodoc:all

        def get_object(container_name, object_name, options = {}, &block)
          unless container_name
            raise ArgumentError.new('container_name is required')
          end
          unless object_name
            raise ArgumentError.new('object_name is required')
          end
          response = Excon::Response.new
          if (container = self.data[:containers][container_name])
            if (object = container[:objects][object_name])
              if options['If-Match'] && options['If-Match'] != object['ETag']
                response.status = 412
              elsif options['If-Modified-Since'] && options['If-Modified-Since'] > Time.parse(object['Last-Modified'])
                response.status = 304
              elsif options['If-None-Match'] && options['If-None-Match'] == object['ETag']
                response.status = 304
              elsif options['If-Unmodified-Since'] && options['If-Unmodified-Since'] < Time.parse(object['Last-Modified'])
                response.status = 412
              else
                response.status = 200
                for key, value in object
                  case key
                  when 'Cache-Control', 'Content-Disposition', 'Content-Encoding', 'Content-Length', 'Content-MD5', 'Content-Type', 'ETag', 'Expires', 'Last-Modified', /^X-Object-Meta-/
                    response.headers[key] = value
                  end
                end
                unless block_given?
                  response.body = object[:body]
                else
                  data = StringIO.new(object[:body])
                  remaining = data.length
                  while remaining > 0
                    chunk = data.read([remaining, Excon::CHUNK_SIZE].min)
                    block.call(chunk)
                    remaining -= Excon::CHUNK_SIZE
                  end
                end
              end
            else
              response.status = 404
              response.body = "The resource could not be found."
              raise(Excon::Errors.status_error({:expects => 200}, response))
            end
          else
            response.status = 404
            response.body = "The resource could not be found."
            raise(Excon::Errors.status_error({:expects => 200}, response))
          end
          response
        end

      end

    end
  end
end