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

interface UseDeviceUseStatementWebSocketOptions {
    deviceUseStatement?: DeviceUseStatement;
    deviceUseStatementId?: string;
    isOpen?: boolean;
    onUpdate: (deviceUseStatement: DeviceUseStatement) => void;
    onDelete: () => void;
}

export const useFhirDeviceUseStatementTargetedBroadcast = ({
                                                               deviceUseStatement,
                                                               deviceUseStatementId,
                                                               isOpen = true,
                                                               onUpdate,
                                                               onDelete
                                                           }: UseDeviceUseStatementWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleDeviceUseStatementEvent = (cloudEvent: any) => {
            const deviceUseStatementPayload: DeviceUseStatement = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = deviceUseStatementId || deviceUseStatement.id;

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

        subscribe('com.akashichealthrecords.fhir.deviceusestatement.updated', handleDeviceUseStatementEvent);
        subscribe('com.akashichealthrecords.fhir.deviceusestatement.deleted', handleDeviceUseStatementEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.deviceusestatement.updated', handleDeviceUseStatementEvent);
            unsubscribe('com.akashichealthrecords.fhir.deviceusestatement.deleted', handleDeviceUseStatementEvent);
        };
    }, [patientState, deviceUseStatement, deviceUseStatementId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};