package unity

import (
	"fmt"
	"github.com/gin-gonic/gin/binding"
	"github.com/go-playground/locales/en"
	"github.com/go-playground/locales/zh"
	ut "github.com/go-playground/universal-translator"
	"github.com/go-playground/validator/v10"
	enTranslations "github.com/go-playground/validator/v10/translations/en"
	zhTranslations "github.com/go-playground/validator/v10/translations/zh"
)

var Validate *validator.Validate // 声明一个全局的validator.Validate实例
var Trans ut.Translator          // 声明一个全局的Translator变量

// InitializeValidator 初始化全局验证器并注册翻译器
func InitializeValidator(local string) error {
	Validate = validator.New()

	// 初始化英语和中文翻译器
	zhT := zh.New()
	enT := en.New()

	// 创建一个通用翻译器实例，传入多个翻译器
	uni := ut.New(enT, zhT, enT)

	// 尝试从通用翻译器中获取指定语言的翻译器
	var found bool
	Trans, found = uni.GetTranslator(local)
	if !found {
		return fmt.Errorf("failed to find translator for %s", local)
	}

	// 注册翻译到验证器
	switch local {
	case "en":
		err := enTranslations.RegisterDefaultTranslations(Validate, Trans)
		if err != nil {
			return err
		}
	case "zh":
		err := zhTranslations.RegisterDefaultTranslations(Validate, Trans)
		if err != nil {
			return err
		}
	default:
		err := enTranslations.RegisterDefaultTranslations(Validate, Trans)
		if err != nil {
			return err
		}
	}

	// 如果您使用 Gin，并想替换 Gin 的默认验证器引擎，请执行以下操作
	if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
		*v = *Validate
	} else {
		return fmt.Errorf("failed to replace Gin's default validator engine")
	}

	return nil
}