defimpl CWMP.Protocol.Generate, for: CWMP.Protocol.Messages.Inform do
  import XmlBuilder

  use CWMP.Protocol.GenerateHelpers

  def generate(req) do
    ctime = timeString(req.current_time)
    element("cwmp:Inform", [
      deviceId(req.device_id),
      events(req.events),
      element(:MaxEnvelopes, req.max_envelopes),
      element(:CurrentTime, ctime),
      element(:RetryCount, req.retry_count),
      parameters(req.parameters)
    ])
  end

  defp deviceId( deviceid ) do
    element(:DeviceId,[ element(:Manufacturer, deviceid.manufacturer),
                         element(:OUI, deviceid.oui),
                         element(:ProductClass, deviceid.product_class),
                         element(:SerialNumber, deviceid.serial_number) ])
  end

  defp events( informevents ) do
    eventlist=for e <- informevents, do: element(
      :EventStruct, [
        element(:EventCode, e.code),
        element(:CommandKey, e.command_key) ])
    element(:Event, %{"SOAP-ENC:arrayType": "cwmp:EventStruct[#{length(eventlist)}]"}, [eventlist])
  end

  defp parameters( parameterlist ) do
    plist=for p <- parameterlist, do: element(:ParameterValueStruct, [
      element(:Name, p.name),
      element(:Value, %{"xsi:type": p.type}, p.value) ] )
    element(:ParameterList, %{"SOAP-ENC:arrayType": "cwmp:ParameterValueStruct[#{length(plist)}]"}, [plist])
  end

end