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

interface UseImmunizationEvaluationWebSocketOptions {
    immunizationEvaluation?: ImmunizationEvaluation;
    immunizationEvaluationId?: string;
    isOpen?: boolean;
    onUpdate: (immunizationEvaluation: ImmunizationEvaluation) => void;
    onDelete: () => void;
}

export const useFhirImmunizationEvaluationTargetedBroadcast = ({
                                                                   immunizationEvaluation,
                                                                   immunizationEvaluationId,
                                                                   isOpen = true,
                                                                   onUpdate,
                                                                   onDelete
                                                               }: UseImmunizationEvaluationWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleImmunizationEvaluationEvent = (cloudEvent: any) => {
            const immunizationEvaluationPayload: ImmunizationEvaluation = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = immunizationEvaluationId || immunizationEvaluation.id;

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

        subscribe('com.akashichealthrecords.fhir.immunizationevaluation.updated', handleImmunizationEvaluationEvent);
        subscribe('com.akashichealthrecords.fhir.immunizationevaluation.deleted', handleImmunizationEvaluationEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.immunizationevaluation.updated', handleImmunizationEvaluationEvent);
            unsubscribe('com.akashichealthrecords.fhir.immunizationevaluation.deleted', handleImmunizationEvaluationEvent);
        };
    }, [patientState, immunizationEvaluation, immunizationEvaluationId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};