import { FieldHook } from 'payload/types';

const format = (val: string): string => val.replace(/ /g, '-').replace(/[^\w-/]+/g, '').toLowerCase();

const formatSlug = (fallback: string): FieldHook => ({ value, originalDoc, data }) => {
	if (typeof value === 'string')
		return format(value);

	const fallbackData = data && data[fallback] || originalDoc && originalDoc[fallback];

	if (fallbackData && typeof fallbackData === 'string')
		return format(fallbackData);


	return value;
};

export default formatSlug;