import { useContext, useMemo } from "react";
import { useFhirRelatedPersons } from "../../../hooks/useFhirRelatedPersons";
import { useMyProxies } from "../../../hooks/useMyProxies";
import { usePatientServiceContext, useRelatedPersonServiceContext } from "../../../services";
import { PatientInboxContext } from "../../../components/PatientInbox/patientInboxContext";
import { usePracticeSwitcher } from "../../../components/PracticeSwitcher/PracticeSwitcherProvider";
import { familyCount, ownTeamCount, type PatientHomeDoorCounts } from "./patientHomeDoorCounts";

// Practices and teams are already loaded by the frame's providers; related persons share the
// Family & caregivers page's cached search.
export const usePatientHomeDoorCounts = (): PatientHomeDoorCounts => {
  const { practiceCount } = usePracticeSwitcher();
  const inbox = useContext(PatientInboxContext);
  const { patientState } = usePatientServiceContext();
  const { cachedForPatientId } = useRelatedPersonServiceContext();
  const { loading, error, relatedPersonsList } = useFhirRelatedPersons();
  const { proxies, isLoading: helpingLoading, error: helpingError } = useMyProxies();
  const patientId = patientState?.id;

  return useMemo(
    () => ({
      practices: practiceCount,
      family: familyCount({
        patientId,
        answeredFor: cachedForPatientId,
        loading,
        error,
        relatedPersons: relatedPersonsList,
        helping: { loading: helpingLoading, error: helpingError, subjects: proxies.map((proxy) => proxy.subjectPatientId) },
      }),
      collaboration: inbox
        ? ownTeamCount({
          patientId,
          openTeams: inbox.openTeams,
          loading: inbox.teamsLoading,
          error: inbox.teamsError,
        })
        : undefined,
    }),
    [practiceCount, patientId, cachedForPatientId, loading, error, relatedPersonsList, helpingLoading, helpingError, proxies, inbox],
  );
};