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

interface UseQuestionnaireResponseWebSocketOptions {
    questionnaireResponse?: QuestionnaireResponse;
    questionnaireResponseId?: string;
    isOpen?: boolean;
    onUpdate: (questionnaireResponse: QuestionnaireResponse) => void;
    onDelete: () => void;
}

export const useFhirQuestionnaireResponseTargetedBroadcast = ({
                                                                  questionnaireResponse,
                                                                  questionnaireResponseId,
                                                                  isOpen = true,
                                                                  onUpdate,
                                                                  onDelete
                                                              }: UseQuestionnaireResponseWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleQuestionnaireResponseEvent = (cloudEvent: any) => {
            const questionnaireResponsePayload: QuestionnaireResponse = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = questionnaireResponseId || questionnaireResponse.id;

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

        subscribe('com.akashichealthrecords.fhir.questionnaireresponse.updated', handleQuestionnaireResponseEvent);
        subscribe('com.akashichealthrecords.fhir.questionnaireresponse.deleted', handleQuestionnaireResponseEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.questionnaireresponse.updated', handleQuestionnaireResponseEvent);
            unsubscribe('com.akashichealthrecords.fhir.questionnaireresponse.deleted', handleQuestionnaireResponseEvent);
        };
    }, [patientState, questionnaireResponse, questionnaireResponseId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};