package utils

import (
	"math/rand"
	"micro-bundle/internal/model"
	"time"
)

const source = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

// 生成订单号  模版 BD20250220104501+6位随机数 避免 订单号重复
func GetOrderNo(orderType int32) string {
	if orderType == model.OrderTypeBundle {
		return "BD" + GetRandomString(20)
	} else if orderType == model.OrderTypeValueAdd {
		return "BNPL" + GetRandomString(20)
	}
	return ""
}

// 生成随机字符串
func GetRandomString(length int) string {
	rand.Seed(time.Now().UnixNano())
	bytes := make([]byte, length)
	for i := 0; i < length; i++ {
		bytes[i] = source[rand.Intn(62)]
	}
	return string(bytes)
}