package validate

import (
	"base-go-v2/internal/errs"
	"errors"
	"reflect"
	"strings"
)

// ValidateNotEmpty 校验结构体中指定字段不能为空
func ValidateNotEmpty(s interface{}, fields ...string) error {
	v := reflect.ValueOf(s)
	if v.Kind() == reflect.Ptr {
		v = v.Elem()
	}

	for _, field := range fields {
		f := v.FieldByName(field)
		if !f.IsValid() {
			return errors.New("field " + field + " does not exist")
		}

		switch f.Kind() {
		case reflect.String:
			if strings.TrimSpace(f.String()) == "" {
				return errs.NewValidationError(field, "不能为空")
			}
		case reflect.Slice, reflect.Array, reflect.Map:
			if f.Len() == 0 {
				return errs.NewValidationError(field, "不能为空")
			}
		case reflect.Ptr, reflect.Interface:
			if f.IsNil() {
				return errs.NewValidationError(field, "不能为空")
			}
		default:
			continue
		}
	}

	return nil
}