package validate

import (
	"reflect"
	"regexp"
	"strings"

	"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 (
	Uni      *ut.UniversalTranslator
	Validate *validator.Validate
	Trans    ut.Translator
)

func Setup() {
	zh := zh.New()
	Uni = ut.New(zh, zh)
	Trans, _ = Uni.GetTranslator("zh")

	// use origin
	// Validate = validator.New()

	// use gin built in
	Validate, _ = binding.Validator.Engine().(*validator.Validate)

	zh_translations.RegisterDefaultTranslations(Validate, Trans)

	Validate.RegisterTagNameFunc(func(fld reflect.StructField) string {
		name := fld.Tag.Get("label")
		return name
	})

	Validate.RegisterValidation("checkMobile", checkMobile)

	// customer error
	Validate.RegisterTranslation("checkMobile", Trans, func(ut ut.Translator) error {
		return ut.Add("checkMobile", "{0}格式错误!", true)
	}, func(ut ut.Translator, fe validator.FieldError) string {
		t, _ := ut.T("checkMobile", fe.Field())
		return t
	})
}

func Translate(errs validator.ValidationErrors) string {
	var errList []string
	for _, e := range errs {
		errList = append(errList, e.Translate(Trans))
	}
	return strings.Join(errList, "|")
}

func checkMobile(fl validator.FieldLevel) bool {
	mobile := fl.Field().String()
	regular := "^(1)\\d{10}$"
	r := regexp.MustCompile(regular)
	return r.MatchString(mobile)
}