// Package validate ...
//
// Description : validate ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2025-03-19 15:50
package validate

import (
	"errors"
	"fmt"
	"github.com/go-playground/validator/v10"
	"reflect"
	"strings"
)

// GetValidateErr 格式化验证结果错误信息
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 15:51 2025/3/19
func GetValidateErr(obj any, rawErr error, errMsgTag string) error {
	if len(errMsgTag) == 0 {
		errMsgTag = TagErrMsg
	}
	if nil == rawErr {
		return nil
	}
	if nil == obj {
		return rawErr
	}
	var (
		ok             bool
		validationErrs validator.ValidationErrors
		errString      []string
		field          reflect.StructField
	)
	if ok = errors.As(rawErr, &validationErrs); !ok {
		return rawErr
	}
	objType := reflect.TypeOf(obj)
	if objType.Kind() == reflect.Ptr {
		objType = objType.Elem()
	}
	for _, validationErr := range validationErrs {
		if field, ok = objType.FieldByName(validationErr.Field()); ok {
			if e := field.Tag.Get(errMsgTag); e != "" {
				errString = append(errString, fmt.Sprintf("%s: %s", field.Tag.Get("json"), e))
				continue
			} else {
				errString = append(errString, fmt.Sprintf("%s: %v", field.Tag.Get("json"), validationErr.Value()))
			}
		}
		errString = append(errString, validationErr.Error())
	}
	return errors.New(strings.Join(errString, "\n"))
}