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

interface UseProcedureWebSocketOptions {
    procedure?: Procedure;
    procedureId?: string;
    isOpen?: boolean;
    onUpdate: (procedure: Procedure) => void;
    onDelete: () => void;
}

export const useFhirProcedureTargetedBroadcast = ({
                                                      procedure,
                                                      procedureId,
                                                      isOpen = true,
                                                      onUpdate,
                                                      onDelete
                                                  }: UseProcedureWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleProcedureEvent = (cloudEvent: any) => {
            const procedurePayload: Procedure = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = procedureId || procedure.id;

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

        subscribe('com.akashichealthrecords.fhir.procedure.updated', handleProcedureEvent);
        subscribe('com.akashichealthrecords.fhir.procedure.deleted', handleProcedureEvent);

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