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

interface UseAdverseEventWebSocketOptions {
    adverseEvent?: AdverseEvent;
    adverseEventId?: string;
    isOpen?: boolean;
    onUpdate: (adverseEvent: AdverseEvent) => void;
    onDelete: () => void;
}

export const useFhirAdverseEventTargetedBroadcast = ({
                                                         adverseEvent,
                                                         adverseEventId,
                                                         isOpen = true,
                                                         onUpdate,
                                                         onDelete
                                                     }: UseAdverseEventWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleAdverseEventEvent = (cloudEvent: any) => {
            const adverseEventPayload: AdverseEvent = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = adverseEventId || adverseEvent.id;

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

        subscribe('com.akashichealthrecords.fhir.adverseevent.updated', handleAdverseEventEvent);
        subscribe('com.akashichealthrecords.fhir.adverseevent.deleted', handleAdverseEventEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.adverseevent.updated', handleAdverseEventEvent);
            unsubscribe('com.akashichealthrecords.fhir.adverseevent.deleted', handleAdverseEventEvent);
        };
    }, [patientState, adverseEvent, adverseEventId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};