/// <reference types="node" />
import EventEmitter from "events";
import { render } from "ink";
/**
 * Launches a CLI app. This is the "bootloader" equivalent for a CLI app.
 *
 * If you have any event listeners attached (eg, using `useKeyboard()`, or `useNodeKeypress()`) then
 * your app won't exit if you don't call `LifecycleHelper.fireExit()`.
 *
 * Usage example:
 * ```tsx
 * const App:FC = ()=> {
 *   const createShortcutsFn = (): ShortcutToActionMap =>
 *     _also(
 *       createNewShortcutToActionMap(),
 *       map => map.set("q", LifecycleHelper.fireExit)
 *     )
 *   useKeyboardWithMapCached(createShortcutsFn)
 *   return( <Text>"Hello"</Text> )
 * }
 *
 * inkCLIAppMainFn( ()=>{
 *   const args = processCommandLineArgs()
 *   return createInkApp(args)
 * } ).catch(console.error)
 * ```
 *
 * @param {() => ReturnType<typeof render>} runFn Do what you need to create an Ink instance
 * @param okExitMsg If non empty string (truthy) display this on exit w/out errors
 * @param errExitMsg If non empty string (truthy) display this on exit w/ errors
 * @return {Promise<void>} Optionally attach a catch block to this promise
 */
export declare const inkCLIAppMainFn: (runFn: () => ReturnType<typeof render>, okExitMsg?: string, errExitMsg?: string) => Promise<void>;
declare type EventName = "exit" | "start";
declare type EventListener = (name: EventName) => void;
export declare class LifecycleHelper extends EventEmitter {
    static instance: LifecycleHelper;
    static addStartListener: (listener: EventListener) => LifecycleHelper;
    static addExitListener: (listener: EventListener) => LifecycleHelper;
    static fireExit: () => boolean;
    static fireStart: () => boolean;
    static removeAll: () => LifecycleHelper;
}
export {};