import { watch } from 'chokidar';
import { existsSync } from 'fs';
import { PATHS } from '../config/constants.js';
import { readJSON } from '../utils/fileUtils.js';
import { broadcast } from './websocket.js';

let watcher = null;

// Inicializar file watcher
export function initFileWatcher() {
  // Watch files for changes
  const filesToWatch = [PATHS.WORKERS].filter(p => existsSync(p));
  
  if (filesToWatch.length === 0) {
    return;
  }
  
  watcher = watch(filesToWatch, {
    persistent: true,
    ignoreInitial: true,
  });
  
  watcher.on('change', async (path) => {
    console.log(`Archivo cambiado: ${path}`);
    if (path === PATHS.WORKERS) {
      const workers = readJSON(PATHS.WORKERS);
      broadcast({ type: 'workers_updated', data: workers });
    }
  });
  
  console.log('✅ File watcher inicializado');
}

// Detener file watcher
export function stopFileWatcher() {
  if (watcher) {
    watcher.close();
    watcher = null;
  }
}