package helper

import (
	"crypto/md5"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"time"
)

const (
	PhotoDomainUrl  = "https://photo-app.ddegame.cn/"
	TimeLayout      = "2006-01-02 15:04:05"
	DateLayout      = "2006-01-02"
	DateLayoutShort = "20060102"
)

func FullPhotoUrl(path string) string {
	if len(path) == 0 {
		return ""
	}
	if strings.Index(path, "http") == 0 {
		return path
	}
	return PhotoDomainUrl + path
}

func Md5ForList(s ...string) string {
	sort.Strings(s)
	h := md5.New()
	h.Write([]byte(strings.Join(s, "")))
	return hex.EncodeToString(h.Sum(nil))
}

func StringToInt(source string) int {
	target, _ := strconv.Atoi(source)
	return target
}

func StringToInt64(source string) int64 {
	target, _ := strconv.Atoi(source)
	return int64(target)
}

func StringToFloat(source string) float64 {
	target, _ := strconv.ParseFloat(source, 64)
	return target
}

func StringIntPlus(s1, s2 string) string {
	return strconv.Itoa(StringToInt(s1) + StringToInt(s2))
}

func StringIntMultiply(s1, s2 string) string {
	return strconv.Itoa(StringToInt(s1) * StringToInt(s2))
}

func StringIntSub(s1, s2 string) string {
	return strconv.Itoa(StringToInt(s1) - StringToInt(s2))
}

func StringFloatSub(s1, s2 string) string {
	return strconv.FormatFloat(StringToFloat(s1)-StringToFloat(s2), 'f', -1, 64)
}

func ListToSet(list []string) (set []string) {
	m := make(map[string]bool, 0)
	for i := range list {
		m[list[i]] = true
	}
	for k := range m {
		set = append(set, k)
	}
	return
}

func ToJson(source interface{}) []byte {
	b, _ := json.Marshal(source)
	return b
}

func NowTimeToString() string {
	return time.Now().Format(TimeLayout)
}

func NowTimeIncreaseString(t time.Duration) string {
	now := time.Now()
	now.Add(t)
	return now.Format(TimeLayout)
}

func NowDateToString() string {
	return time.Now().Format(DateLayout)
}

func NowDateToStringShort() string {
	return time.Now().Format(DateLayoutShort)
}

func Md5(s string) string {
	h := md5.New()
	h.Write([]byte(s))
	return hex.EncodeToString(h.Sum(nil))
}

func ZeroFillByStr(str string, resultLen int, reverse bool) string {
	if len(str) > resultLen || resultLen <= 0 {
		return str
	}
	if reverse {
		return fmt.Sprintf("%0*s", resultLen, str) //不足前置补零
	}
	result := str
	for i := 0; i < resultLen-len(str); i++ {
		result += "0"
	}
	return result

}

func IsMobile(no string) bool {
	return regexp.MustCompile("^1[3456789]\\d{9}$").MatchString(no)
}

func IsEmail(email string) bool {
	pattern := `^[0-9a-z][_.0-9a-z-]{0,31}@([0-9a-z][0-9a-z-]{0,30}[0-9a-z]\.){1,4}[a-z]{2,4}$`
	return regexp.MustCompile(pattern).MatchString(email)
}

func LegalUsername(source string) bool {
	return regexp.MustCompile("^\\D[\\w-]{5,17}$").MatchString(source)
}

func LegalShortUsername(source string) bool {
	return regexp.MustCompile("^[a-zA-Z][\\w-]{2,17}$").MatchString(source)
}

func LegalPassword(source string) bool {
	return regexp.MustCompile("^[a-zA-Z0-9,.!@#$%^&*()_-]{6,18}$").MatchString(source)
}