import type { Practitioner, PractitionerRole, Schedule } from 'fhir/r4';
import { formatFhirHumanName } from '../fhirHumanName';
import { schedulePractitionerId } from './schedulePractitioner';

// A Schedule actor display is a snapshot from when the block was saved, so it goes stale when the name
// changes later. The saved display is only the fallback for a record the viewer cannot read.
export const schedulePractitionerName = (
    schedule: Schedule,
    practitioners: Practitioner[],
    fallback = 'Practitioner not recorded',
    // The schedule's role: its practitioner names a schedule that carries no Practitioner actor of its own.
    role?: PractitionerRole | null,
): string => {
    const ref = schedule.actor?.find((a) => a.reference?.startsWith('Practitioner/'));
    const id = schedulePractitionerId(schedule, role);
    const current = id ? practitioners.find((p) => p.id === id) : undefined;
    const roleName = id && role?.practitioner?.reference === `Practitioner/${id}` ? role.practitioner.display : undefined;
    return formatFhirHumanName(current?.name).trim() || ref?.display || roleName || fallback;
};