package utils

import (
	"crypto/hmac"
	"crypto/md5"
	"crypto/sha256"
	"encoding/base64"
	"encoding/hex"
	"fmt"
	"math"
	"math/rand"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"time"
)

// 手机号，电子邮箱正则
const (
	RegularMobile = "^((13[0-9])|(14[5|7])|(15([0-3]|[5-9]))|(18[0-9])|(17[0-9])|(16[0-9])|(19[0-9]))\\d{8}$" //手机号码
	RegularEmail  = `\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*`                                             //匹配电子邮箱
)

const TelAreaCodeHome = "86" // 大陆区号

// 数据没有记录
func ErrNoRow() string {
	return "<QuerySeter> no row found"
}

var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))

// ValidateMobileFormatat 校验手机格式
func ValidateMobileFormatat(mobileNum string) bool {
	reg := regexp.MustCompile(RegularMobile)
	return reg.MatchString(mobileNum)
}

// ValidateEmailFormatat 校验邮箱格式
func ValidateEmailFormatat(email string) bool {
	reg := regexp.MustCompile(RegularEmail)
	return reg.MatchString(email)
}
func MD5(data string) string {
	m := md5.Sum([]byte(data))
	return hex.EncodeToString(m[:])
}

func CheckPwd(pwd string) bool {
	compile := `([0-9a-z]+){6,12}|(a-z0-9]+){6,12}`
	reg := regexp.MustCompile(compile)
	flag := reg.MatchString(pwd)
	return flag
}

// 计算分页起始页
func StartIndex(page, pagesize int) int {
	if page > 1 {
		return (page - 1) * pagesize
	}
	return 0
}

// GetLikeKeywordPars 获取sql查询中的参数切片
func GetLikeKeywordPars(pars []interface{}, keyword string, num int) (newPars []interface{}) {
	newPars = pars
	if newPars == nil {
		newPars = make([]interface{}, 0)
	}
	for i := 1; i <= num; i++ {
		newPars = append(newPars, `%`+keyword+`%`)
	}
	return
}

// GetRandDigit 获取数字随机字符
func GetRandDigit(n int) string {
	return fmt.Sprintf("%0"+strconv.Itoa(n)+"d", rnd.Intn(int(math.Pow10(n))))
}

func GetRandString(size int) string {
	allLetterDigit := []string{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "!", "@", "#", "$", "%", "^", "&", "*"}
	randomSb := ""
	digitSize := len(allLetterDigit)
	for i := 0; i < size; i++ {
		randomSb += allLetterDigit[rnd.Intn(digitSize)]
	}
	return randomSb
}

// HmacSha256 计算HmacSha256
// key 是加密所使用的key
// data 是加密的内容
func HmacSha256(key string, data string) []byte {
	mac := hmac.New(sha256.New, []byte(key))
	_, _ = mac.Write([]byte(data))
	return mac.Sum(nil)
}

// HmacSha256ToBase64 将加密后的二进制转Base64字符串
func HmacSha256ToBase64(key string, data string) string {
	return base64.URLEncoding.EncodeToString(HmacSha256(key, data))
}

func GetSign(nonce, timestamp, appId, secret string) (sign string) {
	signStrMap := map[string]string{
		"nonce":     nonce,
		"timestamp": timestamp,
		"appid":     appId,
	}
	keys := make([]string, 0, len(signStrMap))
	for k := range signStrMap {
		keys = append(keys, k)
	}
	sort.Strings(keys)
	var signStr string
	for _, k := range keys {
		signStr += k + "=" + signStrMap[k] + "&"
	}
	signStr = strings.Trim(signStr, "&")
	fmt.Println("signStr:" + signStr)
	sign = HmacSha256ToBase64(secret, signStr)
	return
}

func GetRandStringNoSpecialChar(size int) string {
	allLetterDigit := []string{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"}
	randomSb := ""
	digitSize := len(allLetterDigit)
	for i := 0; i < size; i++ {
		randomSb += allLetterDigit[rnd.Intn(digitSize)]
	}
	return randomSb
}

func StringsToJSON(str string) string {
	rs := []rune(str)
	jsons := ""
	for _, r := range rs {
		rint := int(r)
		if rint < 128 {
			jsons += string(r)
		} else {
			jsons += "\\u" + strconv.FormatInt(int64(rint), 16) // json
		}
	}
	return jsons
}

func SecondsToHMS(seconds int64) string {
	duration := time.Duration(seconds) * time.Second
	hours := int64(duration.Hours())
	minutes := int64(duration.Minutes()) % 60
	secs := int64(duration.Seconds()) % 60

	var result string
	if hours > 0 {
		result += fmt.Sprintf("%d时", hours)
	}
	if minutes > 0 || (hours > 0 && secs > 0) {
		result += fmt.Sprintf("%d分", minutes)
	}
	if secs > 0 || (hours == 0 && minutes == 0) {
		result += fmt.Sprintf("%d秒", secs)
	}
	return result
}

func Unique[T comparable](slice []T) []T {
	seen := make(map[T]struct{})
	var unique []T

	for _, v := range slice {
		if _, exists := seen[v]; !exists {
			unique = append(unique, v)
			seen[v] = struct{}{}
		}
	}
	return unique
}

func GetOrmReplaceHolder(num int) string {
	var stringBuffer strings.Builder
	for i := 0; i < num; i++ {
		stringBuffer.WriteString("?")
		if i != num-1 {
			stringBuffer.WriteString(",")
		}
	}
	return stringBuffer.String()
}

func SetKeyExpireToday() time.Duration {
	now := time.Now()
	endOfDay := time.Date(now.Year(), now.Month(), now.Day(), 23, 59, 59, 0, now.Location())
	return time.Until(endOfDay)
}