package testutil

import (
	"fmt"
	"math/rand"
	"os"
	"time"
)

func init() {
	rand.Seed(time.Now().UnixNano())
}

func RandomString(n int) string {
	var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
	s := make([]rune, n)
	for i := range s {
		s[i] = letters[rand.Intn(len(letters))]
	}
	return string(s)
}

func CreateFolder() (tmp string) {
	tmp = fmt.Sprintf("/tmp/%s", RandomString(10))

	err := os.Mkdir(tmp, 0755)

	if err != nil {
		fmt.Println(err.Error())
	}

	return
}

func AppendEmptyFile(path string) (fullPath string) {
	fullPath = fmt.Sprintf("%s/%s", path, RandomString(10))
	os.OpenFile(fullPath, os.O_RDONLY|os.O_CREATE, 0666)

	return
}

func CreateEmptyFile(path string) {
	os.OpenFile(path, os.O_RDONLY|os.O_CREATE, 0666)
}

func CreateTmpFile() (fullPath string) {
	path := CreateFolder()
	fullPath = AppendEmptyFile(path)
	return
}