package utils

import (
	"errors"
	"fmt"
	"sort"
	"strconv"
)

func CombineId(aid, bid string) string {
	ids := []string{aid, bid}

	sort.Slice(ids, func(i, j int) bool {
		a, _ := strconv.ParseUint(ids[i], 0, 64)
		b, _ := strconv.ParseUint(ids[j], 0, 64)
		return a < b
	})

	return fmt.Sprintf("%s_%s", ids[0], ids[1])
}

func CombineUserID(aid, bid int64) string {
	ids := []int64{aid, bid}
	sort.Slice(ids, func(i, j int) bool {
		return ids[i] < ids[j]
	})
	return fmt.Sprintf("%s%s", fmt.Sprintf("%012x", ids[0]), fmt.Sprintf("%012x", ids[1]))
}

func UserIdToHex(id int64) string {
	return fmt.Sprintf("%012x", id)
}

func HexToUID(hex string) (int64, error) {
	var originalID int
	_, err := fmt.Sscanf(hex, "%x", &originalID)
	if err != nil {
		return int64(originalID), errors.New("用户id回转失败")
	}
	return int64(originalID), nil
}