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

interface UseClinicalImpressionWebSocketOptions {
    clinicalImpression?: ClinicalImpression;
    clinicalImpressionId?: string;
    isOpen?: boolean;
    onUpdate: (clinicalImpression: ClinicalImpression) => void;
    onDelete: () => void;
}

export const useFhirClinicalImpressionTargetedBroadcast = ({
                                                               clinicalImpression,
                                                               clinicalImpressionId,
                                                               isOpen = true,
                                                               onUpdate,
                                                               onDelete
                                                           }: UseClinicalImpressionWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleClinicalImpressionEvent = (cloudEvent: any) => {
            const clinicalImpressionPayload: ClinicalImpression = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = clinicalImpressionId || clinicalImpression.id;

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

        subscribe('com.akashichealthrecords.fhir.clinicalimpression.updated', handleClinicalImpressionEvent);
        subscribe('com.akashichealthrecords.fhir.clinicalimpression.deleted', handleClinicalImpressionEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.clinicalimpression.updated', handleClinicalImpressionEvent);
            unsubscribe('com.akashichealthrecords.fhir.clinicalimpression.deleted', handleClinicalImpressionEvent);
        };
    }, [patientState, clinicalImpression, clinicalImpressionId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};