package util

import (
	"crypto/md5"
	"encoding/json"
	"fmt"
	"io"
	"math/rand"
	"reflect"
	"service/library/logger"
	"strings"
	"time"
	"unsafe"

	"github.com/qiniu/qmgo"
)

func ToJson(v any) string {
	str, err := json.Marshal(v)
	if err != nil {
		logger.Info("%v marsha failed, err: %v", v, err)
	}
	return string(str)
}

func StringToMd5(s string) string {
	m := md5.New()
	_, _ = io.WriteString(m, s)
	return fmt.Sprintf("%x", m.Sum(nil))
}

// 将实体类结构体指针转为bson.M，采用反射
func EntityToM(p any) qmgo.M {
	set := qmgo.M{}
	pType := reflect.TypeOf(p).Elem()
	pVal := reflect.ValueOf(p).Elem()
	for i := 0; i < pType.NumField(); i++ {
		name := pType.Field(i).Tag.Get("bson")
		if name != "" {
			field := pVal.Field(i)
			if name != "_id" && !field.IsNil() {
				value := field.Elem().Interface()
				set[name] = value
			}
		}
	}
	return set
}

func StringsContains(elems []string, v string) bool {
	for _, s := range elems {
		if s == v {
			return true
		}
	}
	return false
}

// 下划线转大写驼峰
func UderscoreToUpperCamelCase(s string) string {
	s = strings.Replace(s, "_", " ", -1)
	s = strings.Title(s)
	return strings.Replace(s, " ", "", -1)
}

// 数组转sql数组 []int{1, 2, 3) --> 1,2,3
func Convert2SqlArr(a ...any) string {
	return strings.Replace(strings.Trim(fmt.Sprint(a), "[]"), " ", ",", -1)
}

// 获取整点时间戳
func GetHourStartTimeStamp(t time.Time) int64 {
	loc, _ := time.LoadLocation("Asia/Shanghai")
	timeStr := fmt.Sprintf("%02d-%02d-%02d %02d:00:00", t.Year(), t.Month(), t.Day(), t.Hour())
	duetimecst, err := time.ParseInLocation("2006-1-2 15:04:05", timeStr, loc)
	if err != nil {
		logger.Error("parse error : %v", err)
	}
	return duetimecst.Unix()
}

// 获取今天0点
func GetTodayZeroTime() time.Time {
	currentTime := time.Now()
	zeroTime := time.Date(currentTime.Year(), currentTime.Month(), currentTime.Day(), 0, 0, 0, 0, currentTime.Location())
	return zeroTime
}

// 随机生成字符串
func RandomString(l int) string {
	str := "0123456789AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
	bytes := []byte(str)
	var result []byte = make([]byte, 0, l)
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	for i := 0; i < l; i++ {
		result = append(result, bytes[r.Intn(len(bytes))])
	}
	return BytesToString(result)
}

// BytesToString 0 拷贝转换 slice byte 为 string
func BytesToString(b []byte) (s string) {
	_bptr := (*reflect.SliceHeader)(unsafe.Pointer(&b))
	_sptr := (*reflect.StringHeader)(unsafe.Pointer(&s))
	_sptr.Data = _bptr.Data
	_sptr.Len = _bptr.Len
	return s
}

func UnescapeJsonStr(s string) string {
	s = strings.ReplaceAll(s, "\\u003c", "<")
	s = strings.ReplaceAll(s, "\\u003e", ">")
	s = strings.ReplaceAll(s, "\\u0026", "&")
	return s
}