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

interface UseConditionWebSocketOptions {
    condition?: Condition;
    conditionId?: string;
    isOpen?: boolean;
    onUpdate: (condition: Condition) => void;
    onDelete: () => void;
}

export const useFhirConditionTargetedBroadcast = ({
                                                      condition,
                                                      conditionId,
                                                      isOpen = true,
                                                      onUpdate,
                                                      onDelete
                                                  }: UseConditionWebSocketOptions) => {
    const { subscribe, unsubscribe } = useWebSocketServiceContext();
    const { patientState } = usePatientServiceContext();

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

        const handleConditionEvent = (cloudEvent: any) => {
            const conditionPayload: Condition = cloudEvent.data;
            const eventType = cloudEvent.type;

            const targetId = conditionId || condition.id;

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

        subscribe('com.akashichealthrecords.fhir.condition.updated', handleConditionEvent);
        subscribe('com.akashichealthrecords.fhir.condition.deleted', handleConditionEvent);

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