package nrandom

import (
	"math/rand"
	"time"
)

// RandInt generate random int between min and max, maybe min,  not be max.
//
// Usage:
//
//	RandInt(10, 99)
//	RandInt(100, 999)
//	RandInt(1000, 9999)
func RandInt(min, max int) int {
	return RandIntWithSeed(min, max, time.Now().UnixNano())
}

// RandIntWithSeed return a random int at the [min, max)
// Usage:
//
//	seed := time.Now().UnixNano()
//	RandomIntWithSeed(1000, 9999, seed)
func RandIntWithSeed(min, max int, seed int64) int {
	if min == max {
		return min
	}
	if max < min {
		min, max = max, min
	}
	r := rand.New(rand.NewSource(seed))

	return r.Intn(max-min) + min
}