package utils

import (
	"fmt"
	"math/rand"
	"runtime/debug"
	"strings"
	"time"
	"videoweb/pub/common/log"

	"golang.org/x/exp/constraints"
)

func RecoverError(onError func(err error)) {
	if r := recover(); r != nil {
		err := fmt.Errorf("internal error: %v", r)
		if onError != nil {
			onError(err)
		}
		log.Error(fmt.Sprintf("[Panic] RecoverError err: %+v\n", r) + string(debug.Stack()))
	}
}

func GetRandom(min, max int) int64 {
	rand.Seed(time.Now().UnixNano())
	return int64(rand.Intn(max-min+1) + min)
}
func EnsureRange[T constraints.Ordered](value, min, max T) T {
	if value < min {
		value = min
	}
	if value > max {
		value = max
	}
	return value
}

func InRange[T constraints.Ordered](value, min, max T) bool {
	if value < min {
		return false
	}
	if value > max {
		return false
	}
	return true
}

// Shuffle 使用 Fisher-Yates 算法对切片进行随机排序
func Shuffle[T any](slice []T) {
	rand.Seed(time.Now().UnixNano())
	n := len(slice)
	for i := n - 1; i > 0; i-- {
		j := rand.Intn(i + 1)
		slice[i], slice[j] = slice[j], slice[i]
	}
}
func GetRandomMacAddress() string {
	buf := make([]byte, 6)
	rand.Read(buf)
	buf[0] |= 2
	mac := fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5])
	return strings.ToUpper(mac)
}