package main

import (
	"time"

	omadamodel "git.tordarus.net/tordarus/omada-api/model"
)

var TrafficByClient = map[ClientUniqueID]TrafficRate{}

func CalculateClientTraffic(site *omadamodel.Site, client *omadamodel.Client, duration time.Duration) TrafficRate {
	uniqueID := ClientUniqueID{
		SiteID:    site.ID,
		ClientMac: client.MacAddress,
	}

	trafficTotal := MakeTrafficRate(
		uint64(client.TrafficDownBytes),
		uint64(client.TrafficUpBytes),
	)

	defer func() {
		TrafficByClient[uniqueID] = trafficTotal
	}()

	lastTotal, ok := TrafficByClient[uniqueID]

	if !ok {
		return MakeTrafficRate(0, 0)
	}

	trafficInDur := trafficTotal.Sub(lastTotal)
	seconds := duration.Seconds()

	return MakeTrafficRate(
		uint64(float64(trafficInDur.Received)/seconds),
		uint64(float64(trafficInDur.Transferred)/seconds),
	)
}