import { useEffect, useRef } from 'react';
import { eventBus, type EventMap } from '../utils/eventBus';

type EventListener<K extends keyof EventMap> = {
  busEventKey: K;
  action: (data: EventMap[K]) => void;
};

/**
 * Hook to listen to events from the EventBus
 * Automatically subscribes on mount and unsubscribes on unmount
 */
export const useEventListener = <K extends keyof EventMap>(listener: EventListener<K>) => {
  const actionRef = useRef(listener.action);

  // Keep action ref up to date
  useEffect(() => {
    actionRef.current = listener.action;
  }, [listener.action]);

  useEffect(() => {
    // Subscribe to the event
    const unsubscribe = eventBus.on(listener.busEventKey, (data) => {
      actionRef.current(data);
    });

    // Cleanup: unsubscribe when component unmounts
    return unsubscribe;
  }, [listener.busEventKey]);
};