package rule

import (
	"reflect"
)

type Field struct {
	FieldName  string
	ColumnName string
	Type       string
}

func DefaultUsage(e any) ([]Field, error) {
	fields := make([]Field, 0)

	err := UseTag(e, defaultCallback(&fields))
	if err != nil {
		return nil, err
	}

	return fields, nil
}

func defaultCallback(fields *[]Field) OnParsedFieldTagFunc {
	return func(fieldName string, entityFieldElemValue reflect.Value, tag *Tag) error {
		field := Field{
			FieldName:  fieldName,
			ColumnName: tag.ColumnName,
			Type:       tag.Type,
		}

		*fields = append(*fields, field)
		return nil
	}
}