package randomstring

import (
	"context"
	"math/rand"
)

const chars = "abcdefghijklmnopqrstuvwxyz0123456789"

type Service struct {
	chars  []rune
	length int
	size   uint
}

func New(size uint) *Service {
	return &Service{
		chars:  []rune(chars),
		length: len([]rune(chars)),
		size:   size,
	}
}

func (s *Service) NewString(context.Context) string {
	res := make([]rune, s.size)

	for i := uint(0); i < s.size; i++ {
		res[i] = s.chars[rand.Intn(s.length)]
	}

	return string(res)
}