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

interface UseNutritionOrderWebSocketOptions {
    nutritionOrder?: NutritionOrder;
    nutritionOrderId?: string;
    isOpen?: boolean;
    onUpdate: (nutritionOrder: NutritionOrder) => void;
    onDelete: () => void;
}

export const useFhirNutritionOrderTargetedBroadcast = ({
                                                           nutritionOrder,
                                                           nutritionOrderId,
                                                           isOpen = true,
                                                           onUpdate,
                                                           onDelete
                                                       }: UseNutritionOrderWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleNutritionOrderEvent = (cloudEvent: any) => {
            const nutritionOrderPayload: NutritionOrder = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = nutritionOrderId || nutritionOrder.id;

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

        subscribe('com.akashichealthrecords.fhir.nutritionorder.updated', handleNutritionOrderEvent);
        subscribe('com.akashichealthrecords.fhir.nutritionorder.deleted', handleNutritionOrderEvent);

        return () => {
            unsubscribe('com.akashichealthrecords.fhir.nutritionorder.updated', handleNutritionOrderEvent);
            unsubscribe('com.akashichealthrecords.fhir.nutritionorder.deleted', handleNutritionOrderEvent);
        };
    }, [patientState, nutritionOrder, nutritionOrderId, isOpen, onUpdate, onDelete, subscribe, unsubscribe]);
};