package utils

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

func GenCustomerIdentifier() string {
	random := rand.New(rand.NewSource(time.Now().UnixNano()))
	return fmt.Sprintf("%08v", random.Int31n(100000000))
}

// 生成随机字符串
func GenerateSubString() string {
	var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
	var n = 12
	b := make([]rune, n)
	for i := range b {
		b[i] = letterRunes[rand.New(rand.NewSource(time.Now().UnixNano())).Intn(len(letterRunes))]
	}
	return string(b)
}

func Interface2String(inter interface{}) string {
	switch inter.(type) {
	case string:
		return inter.(string)
	case int:
		return strconv.Itoa(inter.(int))
	case int64:
		return strconv.FormatInt(inter.(int64), 10)
	case float64:
		return strconv.FormatFloat(inter.(float64), 'f', -1, 64)
	case bool:
		return strconv.FormatBool(inter.(bool))
	}
	return ""
}