package app

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

	"github.com/pkg/errors"
)

type cryptoSource struct{}

func (s cryptoSource) Seed(seed int64) {}

func (s cryptoSource) Int63() int64 {
	return int64(s.Uint64() & ^uint64(1<<63))
}

func (s cryptoSource) Uint64() (v uint64) {
	err := binary.Read(rand.Reader, binary.BigEndian, &v)
	if err != nil {
		panic(errors.Wrap(err, "could not read number for random source"))
	}

	return v
}