package randomizer

import "math/rand"

type Random interface {
	Int() int
}

func init(){}
type rndGenerator func(n int) int

type Randomizer struct {
	fn rndGenerator
}

func NewRandomizer(fn rndGenerator) *Randomizer {
	return &Randomizer{fn: fn}
}

func (r *Randomizer) Int(n int) int {
	return r.fn(n)
}

func Rand(rand int) int {
	return randGen(rand)
}
func realRand(n int) int { return int(rand.Intn(n)) }
func fakeRand(n int) func(_ int) int {
	return func(_ int)int { return n}
}
var randGen = NewRandomizer(realRand).Int

func FakeRandomizer(n int) {
	randGen = NewRandomizer(fakeRand(n)).Int
}