package pwgenerator

import (
	"crypto/rand"
	"encoding/binary"
)

// Int63 is used to interface as a *(math/rand).Rand but backed with a cryptographically sound generation.
func (c *cryptoShuffler) Int63() (i int64) {

	var b [8]byte

	_, _ = rand.Read(b[:])

	// Mask is used to ensure a positive number.
	i = int64(binary.LittleEndian.Uint64(b[:]) & (1<<63 - 1))

	return
}

// Seed is used to interface as a *(math/rand).Rand.
func (c *cryptoShuffler) Seed(_ int64) {

	// It's 100% OK that this is a no-op because we seed from the crypto methodology itself within cryptoShuffler.Int63 on each call.

	return
}