import type { FetchServerResponseResult } from '../../client/components/router-reducer/fetch-server-response';
import type { FocusAndScrollRef, PrefetchKind } from '../../client/components/router-reducer/router-reducer-types';
import type { FlightRouterState, FlightSegmentPath } from '../../server/app-render/types';
import React from 'react';
export type ChildSegmentMap = Map<string, CacheNode>;
/**
 * Cache node used in app-router / layout-router.
 */
export type CacheNode = ReadyCacheNode | LazyCacheNode;
export type LoadingModuleData = [React.JSX.Element, React.ReactNode, React.ReactNode] | null;
/** viewport metadata node */
export type HeadData = React.ReactNode;
export type LazyCacheNode = {
    /**
     * When rsc is null, this is a lazily-initialized cache node.
     *
     * If the app attempts to render it, it triggers a lazy data fetch,
     * postpones the render, and schedules an update to a new tree.
     *
     * TODO: This mechanism should not be used when PPR is enabled, though it
     * currently is in some cases until we've implemented partial
     * segment fetching.
     */
    rsc: null;
    /**
     * A prefetched version of the segment data. See explanation in corresponding
     * field of ReadyCacheNode (below).
     *
     * Since LazyCacheNode mostly only exists in the non-PPR implementation, this
     * will usually be null, but it could have been cloned from a previous
     * CacheNode that was created by the PPR implementation. Eventually we want
     * to migrate everything away from LazyCacheNode entirely.
     */
    prefetchRsc: React.ReactNode;
    /**
     * A pending response for the lazy data fetch. If this is not present
     * during render, it is lazily created.
     */
    lazyData: Promise<FetchServerResponseResult> | null;
    prefetchHead: HeadData | null;
    head: HeadData;
    loading: LoadingModuleData | Promise<LoadingModuleData>;
    /**
     * Child parallel routes.
     */
    parallelRoutes: Map<string, ChildSegmentMap>;
    /**
     * The timestamp of the navigation that last updated the CacheNode's data. If
     * a CacheNode is reused from a previous navigation, this value is not
     * updated. Used to track the staleness of the data.
     */
    navigatedAt: number;
};
export type ReadyCacheNode = {
    /**
     * When rsc is not null, it represents the RSC data for the
     * corresponding segment.
     *
     * `null` is a valid React Node but because segment data is always a
     * <LayoutRouter> component, we can use `null` to represent empty.
     *
     * TODO: For additional type safety, update this type to
     * Exclude<React.ReactNode, null>. Need to update createEmptyCacheNode to
     * accept rsc as an argument, or just inline the callers.
     */
    rsc: React.ReactNode;
    /**
     * Represents a static version of the segment that can be shown immediately,
     * and may or may not contain dynamic holes. It's prefetched before a
     * navigation occurs.
     *
     * During rendering, we will choose whether to render `rsc` or `prefetchRsc`
     * with `useDeferredValue`. As with the `rsc` field, a value of `null` means
     * no value was provided. In this case, the LayoutRouter will go straight to
     * rendering the `rsc` value; if that one is also missing, it will suspend and
     * trigger a lazy fetch.
     */
    prefetchRsc: React.ReactNode;
    /**
     * There should never be a lazy data request in this case.
     */
    lazyData: null;
    prefetchHead: HeadData | null;
    head: HeadData;
    loading: LoadingModuleData | Promise<LoadingModuleData>;
    parallelRoutes: Map<string, ChildSegmentMap>;
    navigatedAt: number;
};
export interface NavigateOptions {
    scroll?: boolean;
}
export interface PrefetchOptions {
    kind: PrefetchKind;
    onInvalidate?: () => void;
}
export interface AppRouterInstance {
    /**
     * Navigate to the previous history entry.
     */
    back(): void;
    /**
     * Navigate to the next history entry.
     */
    forward(): void;
    /**
     * Refresh the current page.
     */
    refresh(): void;
    /**
     * Navigate to the provided href.
     * Pushes a new history entry.
     */
    push(href: string, options?: NavigateOptions): void;
    /**
     * Navigate to the provided href.
     * Replaces the current history entry.
     */
    replace(href: string, options?: NavigateOptions): void;
    /**
     * Prefetch the provided href.
     */
    prefetch(href: string, options?: PrefetchOptions): void;
}
export declare const AppRouterContext: React.Context<AppRouterInstance | null>;
export declare const LayoutRouterContext: React.Context<{
    parentTree: FlightRouterState;
    parentCacheNode: CacheNode;
    parentSegmentPath: FlightSegmentPath | null;
    url: string;
} | null>;
export declare const GlobalLayoutRouterContext: React.Context<{
    tree: FlightRouterState;
    focusAndScrollRef: FocusAndScrollRef;
    nextUrl: string | null;
}>;
export declare const TemplateContext: React.Context<React.ReactNode>;
export declare const MissingSlotContext: React.Context<Set<string>>;
