package mathx

import (
	"math/rand"
	"sync"
	"time"
)

type Probe struct {
	r    *rand.Rand
	lock sync.Mutex
}

func NewProbe() *Probe {
	return &Probe{
		r: rand.New(rand.NewSource(time.Now().UnixNano())),
	}
}

func (p *Probe) TrueOnProbe(probe float64) bool {
	p.lock.Lock()
	truth := p.r.Float64() < probe
	p.lock.Unlock()
	return truth
}