package app

import (
	"encoding/json"
	"errors"
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/go-playground/validator/v10"
	"strconv"
	"zhiyuan/pkg/logger"
	"zhiyuan/pkg/validate"
)

func Bind(c *gin.Context, request interface{}) error {
	// use origin
	//c.ShouldBind(request)
	//err := validate.Validate.Struct(request)

	// use built in
	err := c.ShouldBind(request)
	var errStr string
	if err != nil {
		switch err.(type) {
		case validator.ValidationErrors:
			errStr = validate.Translate(err.(validator.ValidationErrors))
		case *json.UnmarshalTypeError:
			unmarshalTypeError := err.(*json.UnmarshalTypeError)
			errStr = fmt.Errorf("%s 类型错误，期望类型 %s", unmarshalTypeError.Field, unmarshalTypeError.Type.String()).Error()
		case *strconv.NumError:
			numError := err.(*strconv.NumError)
			errStr = errors.New("\"" + numError.Num + "\" 必须为数字类型").Error()
		default:
			errStr = errors.New("未知错误").Error()
		}
		logger.Sugar.Error(err)
		ErrorMsg(c, errStr, nil)
		return err
	}
	return nil
}