import { PrimitiveState } from '../utils/PrimitiveState';
import { WidgetCtx } from './widget.ctx';
export type ScreenU = /** A welcome screen to collect user data. Useful in public non-logged-in environments */ 'welcome'
/** Show a list of the user's previous sessions */
 | 'sessions'
/** Self-explanatory */
 | 'chat';
type RouterState = {
    screen: ScreenU;
};
export declare class RouterCtx {
    private widget;
    state: PrimitiveState<RouterState>;
    private subscriptions;
    private disposed;
    private config;
    private contactCtx;
    private sessionCtx;
    private resetChat;
    /**
     * Whether a reload returns the visitor to the conversation they were in.
     * Off by default: the home screen is the sessions list. Embedders whose
     * widget is a continuous assistant (an empty panel beside a live
     * conversation reads as data loss) opt in via `router.restoreLastSession`.
     */
    private readonly shouldRestoreLastSession;
    /** The stored pointer, until it is used or found unusable. */
    private restorableSessionId;
    /** Has the (async) storage read settled? Automatic routing waits for it. */
    private didReadStoredSession;
    constructor(widget: WidgetCtx);
    /**
     * Read the remembered conversation before any automatic routing runs. The
     * read is async (the storage adapter may be), and the sessions list can land
     * first — so routing is re-run once the pointer is known.
     */
    private readStoredSession;
    private registerRoutingListener;
    /**
     * Every automatic route the sessions list can trigger, in one place so the
     * restore can re-run it once the stored pointer is known.
     */
    private routeFromSessions;
    dispose: () => void;
    /** A multi-chat host owns navigation without resetting background sends. */
    navigateConversation?: (sessionId?: string) => WidgetCtx | undefined;
    toSessionsScreen: () => void;
    /**
     * @param sessionId The ID of the session to open, or `undefined` if it is a new chat session
     */
    toChatScreen: (sessionId?: string) => WidgetCtx | undefined;
}
export {};
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