package auth

import (
	"crypto/rand"
	"math/big"
	mrand "math/rand"
)

const (
	stateLength = 32
	stateChars  = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-"
)

func GenerateState() string {
	b := make([]byte, stateLength)
	for i := range b {
		num, err := rand.Int(rand.Reader, big.NewInt(int64(len(stateChars))))
		if err != nil {
			num = big.NewInt(mrand.Int63n(int64(len(stateChars))))
		}
		b[i] = stateChars[num.Int64()]
	}
	return string(b)
}