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

interface UseRelatedPersonWebSocketOptions {
    relatedPerson?: RelatedPerson;
    relatedPersonId?: string;
    isOpen?: boolean;
    onUpdate: (relatedPerson: RelatedPerson) => void;
    onDelete: () => void;
}

export const useFhirRelatedPersonTargetedBroadcast = ({
                                                          relatedPerson,
                                                          relatedPersonId,
                                                          isOpen = true,
                                                          onUpdate,
                                                          onDelete
                                                      }: UseRelatedPersonWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleRelatedPersonEvent = (cloudEvent: any) => {
            const relatedPersonPayload: RelatedPerson = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = relatedPersonId || relatedPerson.id;

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

        subscribe('com.akashichealthrecords.fhir.relatedperson.updated', handleRelatedPersonEvent);
        subscribe('com.akashichealthrecords.fhir.relatedperson.deleted', handleRelatedPersonEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.relatedperson.updated', handleRelatedPersonEvent);
            unsubscribe('com.akashichealthrecords.fhir.relatedperson.deleted', handleRelatedPersonEvent);
        };
    }, [patientState, relatedPerson, relatedPersonId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};