package bps

import "time"

// Multi wraps multiple BPS
type Multi struct {
	bs []*BPS
}

// NewMulti returns a populated Multi that has a BPS for each provided
// duration.
func NewMulti(durs ...time.Duration) (*Multi, error) {
	bs := []*BPS{}
	for _, d := range durs {
		b, err := New(d)
		if err != nil {
			return nil, err
		}
		bs = append(bs, b)
	}
	r := &Multi{bs}
	return r, nil
}

// Add adds i to each internal BPS.
func (mw *Multi) Add(i int64) {
	for _, b := range mw.bs {
		b.Add(i)
	}
}

// Rate returns a slice of rates, one for each BPS.
func (mw *Multi) Rate() []float64 {
	r := []float64{}
	for _, b := range mw.bs {
		r = append(r, b.Rate())
	}
	return r
}