/// <reference types="express" />
import MongooseHelperConfigType from "./types/mongoose-helper-config";
declare class Manager {
    _port: number | string;
    _server: any;
    _initialized: boolean;
    constructor(port?: string | number, callback?: Function, skipInit?: boolean);
    /** Enable morgan HTTP request logger middleware*/
    useMorgan(format?: string): void;
    /** Enable MongoDB initialization for data storage layer
     * @param {string} connectionString - MongoDB Connection string
     */
    useMongo(config: MongooseHelperConfigType): Promise<boolean>;
    /**
     * Initialize Spry
     * @param {Function} callback - Will be called when server is initialized
     */
    private initialize;
    /** Server instance */
    get server(): any;
    set server(val: any);
    get defaultPort(): string;
    /** Get initialized state
     * @returns {boolean} initialized state
     */
    get isInitialized(): boolean;
    /** Get express application instance */
    get app(): import("express").Application;
    private onError;
    private onListening;
    private normalizePort;
}
export default Manager;