func routeEvent(msg *events.Envelope, extraFields map[string]string) {

	eventType := msg.GetEventType()

	if selectedEvents[eventType.String()] {
		var event Event
		switch eventType {
		case events.Envelope_HttpStart:
			event = HttpStart(msg)
		case events.Envelope_HttpStop:
			event = HttpStop(msg)
		case events.Envelope_HttpStartStop:
			event = HttpStartStop(msg)
		case events.Envelope_LogMessage:
			event = LogMessage(msg)
		case events.Envelope_ValueMetric:
			event = ValueMetric(msg)
		case events.Envelope_CounterEvent:
			event = CounterEvent(msg)
		case events.Envelope_Error:
			event = ErrorEvent(msg)
		case events.Envelope_ContainerMetric:
			event = ContainerMetric(msg)
		}

		event.AnnotateWithAppData()
		event.AnnotateWithMetaData(extraFields)
		event.ShipEvent()

		mutex.Lock()
		selectedEventsCount[eventType.String()]++
		mutex.Unlock()
	}
}

func HttpStartStop(msg *events.Envelope) Event {
	httpStartStop := msg.GetHttpStartStop()

	fields := logrus.Fields{
		"cf_app_id":       utils.FormatUUID(httpStartStop.GetApplicationId()),
		"content_length":  httpStartStop.GetContentLength(),
		"instance_id":     httpStartStop.GetInstanceId(),
		"instance_index":  httpStartStop.GetInstanceIndex(),
		"method":          httpStartStop.GetMethod(),
		"peer_type":       httpStartStop.GetPeerType(),
		"remote_addr":     httpStartStop.GetRemoteAddress(),
		"request_id":      utils.FormatUUID(httpStartStop.GetRequestId()),
		"start_timestamp": httpStartStop.GetStartTimestamp(),
		"status_code":     httpStartStop.GetStatusCode(),
		"stop_timestamp":  httpStartStop.GetStopTimestamp(),
		"uri":             httpStartStop.GetUri(),
		"user_agent":      httpStartStop.GetUserAgent(),
		"duration_ms":     (((httpStartStop.GetStopTimestamp() - httpStartStop.GetStartTimestamp()) / 1000) / 1000),
	}

	return Event{
		Fields: fields,
		Msg:    "",
	}
}

func dopplerReceivedMessageCount(msg *events.Envelope) bool {
	return msg.GetEventType() == events.Envelope_CounterEvent &&
		(msg.CounterEvent.GetName() == "udpListener.receivedMessageCount" ||
			msg.CounterEvent.GetName() == "tcpListener.receivedMessageCount" ||
			msg.CounterEvent.GetName() == "tlsListener.receivedMessageCount") &&
		msg.GetOrigin() == "DopplerServer"
}

func listenForLogs() {
	for {
		buffer := make([]byte, 1024)
		n, _, err := udpConn.ReadFrom(buffer)
		if err != nil {
			return
		}

		if n == 0 {
			panic("Received empty packet")
		}
		envelope := new(events.Envelope)
		err = proto.Unmarshal(buffer[0:n], envelope)
		if err != nil {
			panic(err)
		}

		if envelope.GetEventType() == events.Envelope_LogMessage {
			logLock.Lock()
			logMessages = append(logMessages, envelope.GetLogMessage())
			logLock.Unlock()

		}
	}
}

func (l *logCounter) processEnvelope(env *events.Envelope) {
	if env.GetEventType() != events.Envelope_LogMessage {
		return
	}
	logMsg := env.GetLogMessage()

	msg := string(logMsg.GetMessage())
	if strings.HasPrefix(msg, "mismatched prefix") {
		return
	}
	if !strings.HasPrefix(msg, l.cfg.MessagePrefix) {
		fmt.Printf("mismatched prefix: log message %s did not match prefix: %s\n", string(logMsg.GetMessage()), string(l.cfg.MessagePrefix))
		return
	}

	if len(msg) < sepEnd {
		fmt.Printf("Cannot parse message %s\n", msg)
		return
	}

	id := Identity{
		appID: logMsg.GetAppId(),
		runID: msg[prefixEnd:guidEnd],
	}

	l.counterLock.Lock()
	defer l.counterLock.Unlock()
	counter, ok := l.counters[id]
	if !ok {
		counter = make(map[string]bool)
		l.counters[id] = counter
	}
	counter[msg[sepEnd:]] = true
}

func TranslateDropsondeToLegacyLogMessage(message []byte) ([]byte, error) {
	var receivedEnvelope events.Envelope
	err := proto.Unmarshal(message, &receivedEnvelope)
	if err != nil {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Unable to unmarshal bytes as Envelope: %v", err)
	}

	if receivedEnvelope.GetEventType() != events.Envelope_LogMessage {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Envelope contained %s instead of LogMessage", receivedEnvelope.GetEventType().String())
	}

	logMessage := receivedEnvelope.GetLogMessage()
	if logMessage == nil {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Envelope's LogMessage was nil: %v", receivedEnvelope)
	}

	messageBytes, err := proto.Marshal(
		&logmessage.LogMessage{
			Message:     logMessage.GetMessage(),
			MessageType: (*logmessage.LogMessage_MessageType)(logMessage.MessageType),
			Timestamp:   proto.Int64(logMessage.GetTimestamp()),
			AppId:       proto.String(logMessage.GetAppId()),
			SourceId:    proto.String(logMessage.GetSourceInstance()),
			SourceName:  proto.String(logMessage.GetSourceType()),
		},
	)
	if err != nil {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Failed marshalling converted dropsonde message: %v", err)
	}

	return messageBytes, nil
}

func (m *MessageAggregator) Write(envelope *events.Envelope) {
	// TODO: don't call for every message if throughput becomes a problem
	m.cleanupOrphanedHTTPStart()

	if envelope.EventType == nil {
		metrics.BatchIncrementCounter("MessageAggregator.uncategorizedEvents")
		return
	}

	switch envelope.GetEventType() {
	case events.Envelope_HttpStart:
		m.handleHTTPStart(envelope)
	case events.Envelope_HttpStop:
		startStopMessage := m.handleHTTPStop(envelope)
		if startStopMessage != nil {
			m.outputWriter.Write(startStopMessage)
		}
	case events.Envelope_CounterEvent:
		counterEventMessage := m.handleCounter(envelope)
		m.outputWriter.Write(counterEventMessage)
	default:
		metrics.BatchIncrementCounter("MessageAggregator.uncategorizedEvents")
		m.outputWriter.Write(envelope)
	}
}

func (m *MessageAggregator) Write(envelope *events.Envelope) {
	// TODO: don't call for every message if throughput becomes a problem
	m.cleanupOrphanedHTTPStart()

	if envelope.EventType == nil {
		m.outputWriter.Write(envelope)
		return
	}
	switch envelope.GetEventType() {
	case events.Envelope_HttpStart:
		m.handleHTTPStart(envelope)
	case events.Envelope_HttpStop:
		startStopMessage := m.handleHTTPStop(envelope)
		if startStopMessage != nil {
			m.outputWriter.Write(startStopMessage)
		}
	case events.Envelope_CounterEvent:
		counterEventMessage := m.handleCounter(envelope)
		m.outputWriter.Write(counterEventMessage)
	default:
		m.incrementCounter(&m.uncategorizedEventCount)
		m.logger.Debugf("passing through message %v", spew.Sprintf("%v", envelope))
		m.outputWriter.Write(envelope)
	}
}

func (d *DopplerForwarder) networkWrite(message *events.Envelope) {
	client, err := d.clientPool.RandomClient()
	if err != nil {
		d.logger.Errord(map[string]interface{}{
			"error": err.Error(),
		}, "DopplerForwarder: can't forward message")
		return
	}

	messageBytes, err := proto.Marshal(message)
	if err != nil {
		d.logger.Errorf("DopplerForwarder: marshal error %v", err)
		metrics.BatchIncrementCounter("dropsondeMarshaller.marshalErrors")
		return
	}

	switch client.Scheme() {
	case "udp":
		signedMessage := signature.SignMessage(messageBytes, d.sharedSecret)
		bytesWritten, err := client.Write(signedMessage)
		if err != nil {
			metrics.BatchIncrementCounter("udp.sendErrorCount")
			d.logger.Debugd(map[string]interface{}{
				"scheme":  client.Scheme(),
				"address": client.Address(),
			}, "Error writing legacy message")
			return
		}
		metrics.BatchIncrementCounter("udp.sentMessageCount")
		metrics.BatchAddCounter("udp.sentByteCount", uint64(bytesWritten))
	case "tls":
		var bytesWritten int
		err = binary.Write(client, binary.LittleEndian, uint32(len(messageBytes)))
		if err == nil {
			bytesWritten, err = client.Write(messageBytes)
		}

		if err != nil {
			metrics.BatchIncrementCounter("tls.retryCount")
			d.inputChan <- message
			client.Close()

			d.logger.Errord(map[string]interface{}{
				"scheme":  client.Scheme(),
				"address": client.Address(),
				"error":   err.Error(),
			}, "DopplerForwarder: streaming error")
			return
		}
		metrics.BatchIncrementCounter("tls.sentMessageCount")
		metrics.BatchAddCounter("tls.sentByteCount", uint64(bytesWritten+4))
	default:
		d.logger.Errorf("DopplerForwarder: unknown protocol, %s for %s", client.Scheme(), client.Address())
		return
	}

	d.incrementMessageCount(message.GetEventType())
	metrics.BatchIncrementCounter("DopplerForwarder.sentMessages")
}

func addDefaultTags(envelope *events.Envelope) *events.Envelope {
	envelope.Deployment = proto.String("deployment-name")
	envelope.Job = proto.String("test-component")
	envelope.Index = proto.String("42")
	envelope.Ip = proto.String(localIPAddress)

	return envelope
}

func DecodeProtoBufLogMessage(actual []byte) *events.LogMessage {
	var receivedEnvelope events.Envelope
	err := proto.Unmarshal(actual, &receivedEnvelope)
	if err != nil {
		Fail(err.Error())
	}
	return receivedEnvelope.GetLogMessage()
}

func EmitToMetron(envelope *events.Envelope) {
	metronConn, err := net.Dial("udp4", fmt.Sprintf("localhost:%d", config.DropsondePort))
	Expect(err).NotTo(HaveOccurred())

	b, err := envelope.Marshal()
	Expect(err).NotTo(HaveOccurred())

	_, err = metronConn.Write(b)
	Expect(err).NotTo(HaveOccurred())
}

func (metrics *metrics) processMetric(metric *events.Envelope) {
	switch metric.GetEventType() {
	case events.Envelope_ValueMetric:
		metrics.processValueMetric(metric)
	case events.Envelope_CounterEvent:
		metrics.processCounterEvent(metric)
	case events.Envelope_HttpStartStop:
		metrics.processHTTPStartStop(metric)
	}
}

func getName(envelope *events.Envelope) string {
	switch envelope.GetEventType() {
	case events.Envelope_ValueMetric:
		return envelope.GetOrigin() + "." + envelope.GetValueMetric().GetName()
	case events.Envelope_CounterEvent:
		return envelope.GetOrigin() + "." + envelope.GetCounterEvent().GetName()
	default:
		panic("Unknown event type")
	}
}

func (m *MessageAggregator) handleHTTPStart(envelope *events.Envelope) {
	metrics.BatchIncrementCounter("MessageAggregator.httpStartReceived")

	logging.Debugf(m.logger, "handling HTTP start message for appID: %v", envelope.GetHttpStart().GetApplicationId())
	startEvent := envelope.GetHttpStart()

	requestID := startEvent.RequestId.String()
	event := eventID{requestID: requestID, peerType: startEvent.GetPeerType()}
	m.startEventsByEventID[event] = startEventEntry{startEvent: startEvent, entryTime: time.Now()}
}

func basicTaggedHttpStartStopMessage(envelope events.Envelope) *events.Envelope {
	ip, _ := localip.LocalIP()

	envelope.Deployment = proto.String("test-deployment")
	envelope.Job = proto.String("test-job")
	envelope.Index = proto.String("2")
	envelope.Ip = proto.String(ip)

	return &envelope
}

func (m *MessageAggregator) handleHTTPStart(envelope *events.Envelope) {
	m.incrementCounter(&m.httpStartReceivedCount)

	m.logger.Debugf("handling HTTP start message %v", spew.Sprintf("%v", envelope))
	startEvent := envelope.GetHttpStart()

	requestID := startEvent.RequestId.String()
	event := eventID{requestID: requestID, peerType: startEvent.GetPeerType()}
	m.startEventsByEventID[event] = startEventEntry{startEvent: startEvent, entryTime: time.Now()}
}

func (m *MetricsNozzle) handleMessage(envelope *events.Envelope) {
	if m.config.OriginID != "" {
		if envelope.GetOrigin() == m.config.OriginID {
			fmt.Fprintf(m.stdout, "%v \n", envelope)
		}
	} else {
		fmt.Fprintf(m.stdout, "%v \n", envelope)
	}

}

func update(values map[string]int64, event *events.Envelope) int64 {

	values[event.GetIp()] = int64(event.GetCounterEvent().GetTotal())

	var sum int64
	for _, v := range values {
		sum = sum + v
	}

	return sum
}

func (m *MsgLossChart) ProcessEvent(evt *events.Envelope) {
	switch evt.GetCounterEvent().GetName() {
	case "DopplerForwarder.sentMessages":
		m.totalSent = update(m.sentByIP, evt)
	case "tlsListener.receivedMessageCount", "dropsondeListener.receivedMessageCount":
		m.totalReceived = update(m.receivedByIP, evt)
	}
	percent := 100 * ((m.totalSent - m.totalReceived) / m.totalSent)

	m.graph.Percent = int(percent)
}