/// <reference types="node" />
import { ServerOptions } from "@nimbus/server";
import { ApolloServer } from "apollo-server-express";
import { GetMiddlewareOptions } from "apollo-server-express/src/ApolloServer";
import { Application } from "express";
import { Server } from "http";
import { ApolloServerConfig } from "./apollo";
export interface ApolloServerExpress extends ApolloServerConfig {
    server?: GetMiddlewareOptions & ServerOptions;
}
/**
 * A configured ready to use graphql server
 */
export declare class GraphQLServer {
    private readonly _serverOptions;
    _server: Server;
    private readonly _express;
    private readonly _apollo;
    constructor(_serverOptions: ApolloServerExpress, _express?: Application);
    prepare(): this;
    get server(): Server;
    get express(): Application;
    get apollo(): ApolloServer;
    on: Server["on"];
    listen(port: number): Promise<unknown>;
    close(): Promise<unknown>;
}