import type { createReadStream, existsSync, statSync } from 'node:fs';
import { type IncomingMessage, type Server as HttpServer, type ServerResponse } from 'node:http';
import { type Server as HttpsServer } from 'node:https';
import type { OutputFileSystem } from 'webpack';
import { type CertOption } from '../dev/get-cert.mjs';
export type FileSystem = OutputFileSystem & {
    existsSync: typeof existsSync;
    createReadStream: typeof createReadStream;
    statSync: typeof statSync;
};
type HttpServerResponse = ServerResponse<IncomingMessage> & {
    req: IncomingMessage;
};
interface ServerOption {
    port: number;
    root_dir: string;
    fileSystem: FileSystem;
    onRequest?(req: IncomingMessage, res: HttpServerResponse): boolean | void;
    headers?: Record<string, string>;
    basename?: string;
    https?: CertOption | boolean;
    host: string;
    open?: boolean;
}
export type Server = HttpServer | HttpsServer;
declare function server(option: ServerOption): Promise<HttpServer<typeof IncomingMessage, typeof ServerResponse>>;
export default server;