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

interface UseFhirAppointmentTargetedBroadcastOptions {
    appointment?: Appointment;
    appointmentId?: string;
    isOpen?: boolean;
    onUpdate: (appointment: Appointment) => void;
    onDelete: () => void;
}

export const useFhirAppointmentTargetedBroadcast = ({
                                                        appointment,
                                                        appointmentId,
                                                        isOpen = true,
                                                        onUpdate,
                                                        onDelete
                                                    }: UseFhirAppointmentTargetedBroadcastOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleAppointmentEvent = (cloudEvent: any) => {
            const bundle: Bundle<Appointment | Slot> = cloudEvent.data;
            const eventType = cloudEvent.type;
            const appointmentPayload: Appointment = bundle.entry?.find(e => e.resource?.resourceType === 'Appointment')?.resource as Appointment;
            const targetId = appointmentId || appointment.id;

            if (!appointmentPayload) {
                console.warn('No appointment found in broadcast bundle');
                return;
            }

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

                }
            }
        };

        subscribe('com.akashichealthrecords.fhir.appointment.updated', handleAppointmentEvent);
        subscribe('com.akashichealthrecords.fhir.appointment.deleted', handleAppointmentEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.appointment.updated', handleAppointmentEvent);
            unsubscribe('com.akashichealthrecords.fhir.appointment.deleted', handleAppointmentEvent);
        };
    }, [patientState, appointment, appointmentId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};