/// <reference types="node" />
import { EventEmitter } from "node:events";
/**
 * Class representing a file watcher.
 * @extends EventEmitter
 */
export declare class FileWatcher extends EventEmitter {
    private processId;
    private baseDir;
    private watchers;
    private dirHandlers;
    private ignoredDirectories;
    private allowedExtensions;
    private monitoredDirectories;
    private initialFiles;
    /**
     * Create a FileWatcher.
     * @param {number} [processId] - The process ID.
     */
    constructor(processId?: number);
    /**
     * Watch a directory for changes.
     * @private
     * @param {string} directory - The directory to watch.
     */
    private watchDirectory;
    /**
     * Find a handler for a specific event type in a directory.
     * @private
     * @param {string} directory - The directory to find the handler for.
     * @param {"add" | "change" | "unlink"} eventType - The event type.
     * @returns {Function | undefined} The handler function or undefined if not found.
     */
    private findHandler;
    /**
     * Handle a file system event.
     * @private
     * @param {"add" | "change" | "unlink"} eventType - The event type.
     * @param {string} directory - The directory where the event occurred.
     * @param {string} filePath - The path of the file that triggered the event.
     */
    private handleEvent;
    /**
     * Capture the initial files in a directory.
     * @private
     * @param {string} directory - The directory to capture initial files from.
     */
    private captureInitialFiles;
    /**
     * Start watching the directories.
     */
    startWatching(): this;
    /**
     * Stop watching all directories.
     */
    stopWatching(): this;
    /**
     * Set a handler for a specific event type in a directory.
     * @param {string} directory - The directory to set the handler for.
     * @param {"add" | "change" | "unlink"} eventType - The event type.
     * @param {Function} callback - The handler function.
     */
    setHandler(directory: string, eventType: "add" | "change" | "unlink", callback: (directory: string, filename: string, relativePath: string, eventType: "add" | "change" | "unlink") => void): this;
    /**
     * Ignore specific directories.
     * @param {...string} directory - The directories to ignore.
     * @returns {FileWatcher} The current FileWatcher instance.
     */
    ignoreDirectory(...directory: string[]): this;
    /**
     * Unignore specific directories.
     * @param {...string} directory - The directories to unignore.
     * @returns {FileWatcher} The current FileWatcher instance.
     */
    unignoreDirectory(...directory: string[]): this;
    /**
     * Set the allowed file extensions to watch.
     * @param {...string} extensions - The file extensions to allow.
     * @returns {FileWatcher} The current FileWatcher instance.
     */
    setAllowedExtensions(...extensions: string[]): this;
    /**
     * Set the directories to monitor.
     * @param {...string} directories - The directories to monitor.
     * @returns {FileWatcher} The current FileWatcher instance.
     */
    setMonitoredDirectories(...directories: string[]): this;
}