import { ApiMethods } from "../api";
import { ApplicationOverrides, CustomElementOptions } from "../CustomElement";
import { RootNode } from "../dom";
export interface AppOptions {
    /** The root node that contains the application. */
    rootNode: RootNode;
    /** The HTML element that embeds the application. */
    hostElement: HTMLElement;
    /** Trails options for the application. */
    elementOptions: CustomElementOptions;
    /** These have higher priority than the options in `elementOptions`. */
    overrides: ApplicationOverrides | undefined;
    /**
     * A callback to restart the application with new options.
     * Currently only used for reloading with a certain locale.
     */
    restart: (overrides?: ApplicationOverrides) => void;
}
export type AppState = "not-started" | "starting" | "started" | "destroyed" | "error";
export declare class AppInstance {
    private options;
    private apiPromise;
    private api;
    private state;
    private rootNode;
    private container;
    private appRoot;
    private config;
    private i18n;
    private serviceLayer;
    private lifecycleEvents;
    private themeService;
    private reactIntegration;
    private stylesWatch;
    constructor(options: AppOptions);
    start(): void;
    destroy(): void;
    private reset;
    whenAPI(): Promise<ApiMethods>;
    private startImpl;
    /**
     * Returns a signal that contains the application's styles.
     * During development, the signal is updated when the user edits .css files.
     * In production, the signal is static.
     */
    private initStylesSignal;
    private initServiceLayer;
    private initAPI;
    private triggerApplicationLifecycleEvent;
    private checkAbort;
    private showErrorScreen;
}