import { useEffect } from 'react';
import { EpisodeOfCare } from 'fhir/r4';
import { usePatientServiceContext, useWebSocketServiceContext } from '../services';

interface UseEpisodeOfCareWebSocketOptions {
    episodeOfCare?: EpisodeOfCare;
    episodeOfCareId?: string;
    isOpen?: boolean;
    onUpdate: (episodeOfCare: EpisodeOfCare) => void;
    onDelete: () => void;
}

export const useFhirEpisodeOfCareTargetedBroadcast = ({
                                                          episodeOfCare,
                                                          episodeOfCareId,
                                                          isOpen = true,
                                                          onUpdate,
                                                          onDelete
                                                      }: UseEpisodeOfCareWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

    useEffect(() => {
        if (!patientState || !episodeOfCare || !isOpen) {
            return;
        }

        const handleEpisodeOfCareEvent = (cloudEvent: any) => {
            const episodeOfCarePayload: EpisodeOfCare = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = episodeOfCareId || episodeOfCare.id;

            if (episodeOfCarePayload.id === targetId) {
                switch (eventType) {
                    case 'com.akashichealthrecords.fhir.episodeofcare.updated':
                        onUpdate(episodeOfCarePayload);
                        break;
                    case 'com.akashichealthrecords.fhir.episodeofcare.deleted':
                        onDelete();
                        break;
                }
            }
        };

        subscribe('com.akashichealthrecords.fhir.episodeofcare.updated', handleEpisodeOfCareEvent);
        subscribe('com.akashichealthrecords.fhir.episodeofcare.deleted', handleEpisodeOfCareEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.episodeofcare.updated', handleEpisodeOfCareEvent);
            unsubscribe('com.akashichealthrecords.fhir.episodeofcare.deleted', handleEpisodeOfCareEvent);
        };
    }, [patientState, episodeOfCare, episodeOfCareId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};