package utils

import (
	"hash/crc32"
	"strconv"
	"time"

	uuid "github.com/satori/go.uuid"
)

func GetUUID() string {
	return uuid.NewV4().String()
}

//the result likes 1423361979
func GetTimestamp() int64 {
	return time.Now().Unix()
}

func Int2String(val int64) string {
	return strconv.Itoa(int(val))
}

func ValidTime(t time.Time) bool {
	t1970, _ := time.Parse("2006-01-02", "1970-01-01")
	return t.After(t1970)
}

func String2Int64(str string) int64 {
	number, _ := strconv.ParseInt(str, 10, 64)
	return number
}

func HashCode(s string) int {
	v := int(crc32.ChecksumIEEE([]byte(s)))
	if v >= 0 {
		return v
	}
	if -v >= 0 {
		return -v
	}
	return 0
}