import { useEffect } from 'react';

type EventHandler = (data: any) => void;

class NeuralEventBus {
  private listeners: Map<string, EventHandler[]> = new Map();

  on(event: string, handler: EventHandler) {
    if (!this.listeners.has(event)) {
      this.listeners.set(event, []);
    }
    this.listeners.get(event)?.push(handler);
  }

  off(event: string, handler: EventHandler) {
    const handlers = this.listeners.get(event);
    if (handlers) {
      this.listeners.set(event, handlers.filter(h => h !== handler));
    }
  }

  emit(event: string, data: any) {
    const handlers = this.listeners.get(event);
    if (handlers) {
      handlers.forEach(h => h(data));
    }
  }
}

export const neuralEventBus = new NeuralEventBus();

export const emitNeuralEvent = (event: string, data: any) => {
  neuralEventBus.emit(event, data);
};

export const useNeuralEvent = (event: string, handler: EventHandler) => {
  useEffect(() => {
    neuralEventBus.on(event, handler);
    return () => {
      neuralEventBus.off(event, handler);
    };
  }, [event, handler]);
};