package validate

import (
	"yitao/ecode"

	"github.com/go-playground/locales/zh"
	ut "github.com/go-playground/universal-translator"
	"github.com/go-playground/validator/v10"
	"github.com/kataras/iris/v12"
)

var validate *validator.Validate
var trans ut.Translator

type ParamInterface interface {
	Default()
}

func InitValidator() {
	validate = validator.New()
	eng := zh.New()
	uni := ut.New(eng, eng)
	trans, _ = uni.GetTranslator("zh")

	addTranslation("min", "{0} 长度必须至少为 {1} 个字符")
	addTranslation("max", "{0} 长度不能超过 {1} 个字符")
	addTranslation("len", "{0} 长度应该为 {1} 个字符")
	addTranslation("required", "{0} 不能为空")
}

func addTranslation(tag string, tr string) {
	validate.RegisterTranslation(tag, trans, func(ut ut.Translator) error {
		return ut.Add(tag, tr, true)
	}, func(ut ut.Translator, fe validator.FieldError) string {
		t, _ := ut.T(tag, fe.Field(), fe.Param())
		return t
	})
}

func GetValidator() *validator.Validate {
	return validate
}

func ReadJSON(ctx iris.Context, result ParamInterface) *ecode.Ecode {
	ctx.ReadBody(result)
	err := GetValidator().Struct(result)
	if err != nil {
		validateErr := err.(validator.ValidationErrors)
		firstValue := ""
		for _, v := range validateErr.Translate(trans) {
			firstValue = v
			break // 退出循环，确保只获取第一个元素
		}
		return ecode.Set(255, firstValue)
	}
	// 填充默认值
	result.Default()
	return ecode.OK()
}

func ReadQuery(ctx iris.Context, result ParamInterface) *ecode.Ecode {
	ctx.ReadQuery(result)
	err := GetValidator().Struct(result)
	if err != nil {
		validateErr := err.(validator.ValidationErrors)
		firstValue := ""
		for _, v := range validateErr.Translate(trans) {
			firstValue = v
			break // 退出循环，确保只获取第一个元素
		}
		return ecode.Set(255, firstValue)
	}
	result.Default()
	return ecode.OK()
}