package hrend

import (
	"time"
)

// Sum up and average frame times at desired intervals. Average and sum
// should be seconds
type FrameTimer struct {
	Sum         time.Duration
	TotalTime   time.Duration
	Count       int
	TotalCount  int
	LastAverage time.Duration
}

func (ft *FrameTimer) Add(t time.Duration, avgcount int) {
	ft.Sum += t
	ft.TotalTime += t
	ft.Count += 1
	ft.TotalCount += 1
	if ft.Count%avgcount == 0 {
		ft.LastAverage = ft.Sum / time.Duration(ft.Count)
		ft.Sum = 0
		ft.Count = 0
	}
}