import type { Reference } from 'fhir/r4';

// A form carries a link either as the stored reference it loaded or as a resource just picked, and the
// two shapes must save the same way. Rebuilding a stored one from an id it lacks writes "Type/undefined".
export const referenceFromFormItem = (
    item: { reference?: string; display?: string; resourceType?: string; id?: string } | undefined,
    fallbackType?: string,
): Reference | undefined => {
    if (!item) return undefined;
    if (item.reference) return item.display ? { reference: item.reference, display: item.display } : { reference: item.reference };
    const type = item.resourceType ?? fallbackType;
    return type && item.id ? { reference: `${type}/${item.id}` } : undefined;
};