import { useCallback, useMemo } from "react";
import type { Appointment, Location, Organization } from "fhir/r4";
import { useAuthServiceContext } from "../services";
import type { PractitionerWithRoles } from "../services/PractitionerService.tsx";
import { useMyOrganizations } from "./useMyOrganizations.tsx";
import { usePracticeZones } from "./usePracticeToday";
import { appointmentPractice, appointmentPracticeId, type AppointmentPractice } from "../utils/appointmentPractice";

/**
 * Each appointment's own practice and clock, for lists that can span practices. The signed-in
 * practice is only a place to look an id up, never an answer for an appointment that names none.
 */
export const useAppointmentPractices = (
  appointments: readonly Appointment[],
  practitioners: readonly PractitionerWithRoles[],
  locations: readonly Location[],
  { readPatientPractices = true }: { readPatientPractices?: boolean } = {},
): ((appointment: Appointment) => AppointmentPractice) => {
  const { wpOrganization } = useAuthServiceContext();
  const { organizations } = useMyOrganizations({ enabled: readPatientPractices });
  const ids = useMemo(
    () => appointments
      .map((appointment) => appointmentPracticeId(appointment, practitioners, locations))
      .filter((id): id is string => Boolean(id)),
    [appointments, practitioners, locations],
  );
  const zones = usePracticeZones(ids);
  const active = wpOrganization?.current;

  return useCallback(
    (appointment: Appointment) => appointmentPractice(appointment, {
      practitioners,
      locations,
      organizations: [...(active ? [active as Organization] : []), ...organizations],
      zoneOf: (id) => zones.get(id) ?? null,
    }),
    [practitioners, locations, organizations, active, zones],
  );
};

export default useAppointmentPractices;