package common

import (
	"regexp"

	"github.com/gin-gonic/gin/binding"
	"github.com/go-playground/locales/zh"
	ut "github.com/go-playground/universal-translator"
	"github.com/go-playground/validator/v10"
	zh_translations "github.com/go-playground/validator/v10/translations/zh"
)

var (
	phoneRegexp = regexp.MustCompile(`^1[3456789]\d{9}$`)
	emailRegexp = regexp.MustCompile(`^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`)
)

// IsPhoneValid 验证手机号格式
func IsPhoneValid(fl validator.FieldLevel) bool {
	return phoneRegexp.MatchString(fl.Field().String())
}

// IsEmailValid 验证邮箱格式
func IsEmailValid(fl validator.FieldLevel) bool {
	return emailRegexp.MatchString(fl.Field().String())
}

func ValidatePassword(fl validator.FieldLevel) bool {
	password := fl.Field().String()
	if password == "" {
		return true
	}
	if len(password) < 8 || len(password) > 16 {
		return false
	}
	if !regexp.MustCompile(`[0-9]`).MatchString(password) ||
		!regexp.MustCompile(`[a-zA-Z]`).MatchString(password) {
		return false
	}
	return true
}

var trans ut.Translator

func init() {
	if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
		v.RegisterValidation("password", ValidatePassword)
		v.RegisterValidation("email", IsEmailValid)
		v.RegisterValidation("phone", IsPhoneValid)

		zhCn := zh.New()
		uni := ut.New(zhCn, zhCn)
		trans, _ = uni.GetTranslator("zh")
		zh_translations.RegisterDefaultTranslations(v, trans)

		v.RegisterTranslation("password", trans, func(ut ut.Translator) error {
			return ut.Add("password", "{0}必须包含数字、字母，长度在8-16位之间", true)
		}, func(ut ut.Translator, fe validator.FieldError) string {
			t, _ := ut.T("password", fe.Field())
			return t
		})

		v.RegisterTranslation("phone", trans, func(ut ut.Translator) error {
			return ut.Add("phone", "{0}格式不正确", true)
		}, func(ut ut.Translator, fe validator.FieldError) string {
			t, _ := ut.T("phone", fe.Field())
			return t
		})

		v.RegisterTranslation("email", trans, func(ut ut.Translator) error {
			return ut.Add("email", "{0}格式不正确", true)
		}, func(ut ut.Translator, fe validator.FieldError) string {
			t, _ := ut.T("email", fe.Field())
			return t
		})
	}
}

func GetTrans() ut.Translator {
	return trans
}