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

interface UseDetectedIssueWebSocketOptions {
    detectedIssue?: DetectedIssue;
    detectedIssueId?: string;
    isOpen?: boolean;
    onUpdate: (detectedIssue: DetectedIssue) => void;
    onDelete: () => void;
}

export const useFhirDetectedIssueTargetedBroadcast = ({
                                                          detectedIssue,
                                                          detectedIssueId,
                                                          isOpen = true,
                                                          onUpdate,
                                                          onDelete
                                                      }: UseDetectedIssueWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleDetectedIssueEvent = (cloudEvent: any) => {
            const detectedIssuePayload: DetectedIssue = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = detectedIssueId || detectedIssue.id;

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

        subscribe('com.akashichealthrecords.fhir.detectedissue.updated', handleDetectedIssueEvent);
        subscribe('com.akashichealthrecords.fhir.detectedissue.deleted', handleDetectedIssueEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.detectedissue.updated', handleDetectedIssueEvent);
            unsubscribe('com.akashichealthrecords.fhir.detectedissue.deleted', handleDetectedIssueEvent);
        };
    }, [patientState, detectedIssue, detectedIssueId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};