import { Context, MiddlewareFunction, RequestOptions } from './interfaces';
import { JsLoaderOptions } from './abilities/jsloader';
export default class Saber<ExtendCtx extends Record<string, any>> {
    /** 加载 JS CDN 资源 */
    static loadScript(src: string, options?: JsLoaderOptions): Promise<unknown>;
    /** 单例模式 */
    static singleton<ExtendCtx extends Record<string, any>>(): Saber<ExtendCtx>;
    private _middlewares;
    private _middlewareMap;
    private _invoker;
    constructor();
    private _init;
    /**
     * 添加中间件
     * @param middleware
     * @param order 调用顺序，默认按添加的顺序
     */
    use(middleware: MiddlewareFunction, order?: number): this;
    run(api: string, options?: RequestOptions<ExtendCtx>): Promise<Context & ExtendCtx>;
    request(api: string, options?: RequestOptions<ExtendCtx>): Promise<any>;
    /** alias for request */
    invoke: (api: string, options?: RequestOptions<ExtendCtx>) => Promise<any>;
    /** 加载 JS CDN 资源 */
    loadScript(src: string, options?: JsLoaderOptions): Promise<unknown>;
}