import type { StorageArea } from 'kv-storage-interface';
import type { Context } from './context.js';
import type { Awaitable } from './utils/common-types.js';
import type { UnsignedCookiesContext, SignedCookiesContext, EncryptedCookiesContext } from './cookies.js';
import type { FlushedContext } from './flushed.js';
declare type Rec = Record<PropertyKey, any>;
declare type CookieContext = Context & (EncryptedCookiesContext | SignedCookiesContext | UnsignedCookiesContext);
interface SessionContext<S extends Rec = Rec> {
    session: S;
}
export interface CookieSessionContext<S extends Rec = Rec> extends SessionContext<S> {
    cookieSession: S;
}
export interface StorageSessionContext<S extends Rec = Rec> extends SessionContext<S> {
    storageSession: S;
}
export interface CookieSessionOptions<S extends Rec = Rec> {
    /** The name of the session cookie. Defaults to `sid`. */
    cookieName?: string;
    /** Session expiration time in seconds. Defaults to five minutes. */
    expirationTtl?: number;
    /** Provide a record that serves as the default session object. Also used for type inference. */
    defaultSession?: S;
}
export interface StorageSessionOptions<S extends Rec = Rec> extends CookieSessionOptions<S> {
    /** The storage area where to persist the session objects. */
    storage: StorageArea;
}
/**
 * Cookie session middleware for worker runtimes.
 *
 * Requires a cookie store, preferably encrypted or signed.
 *
 * Important: This will serialize the entire session data and store it in a cookie. It is sent with every request!
 * Only applicable for small session objects. Use `storageSession` for a traditional, KV store-backed session.
 */
export declare function cookieSession<S extends Rec = Rec>(options?: CookieSessionOptions<S>): <X extends CookieContext>(ax: Awaitable<X>) => Promise<X & CookieSessionContext<S>>;
/**
 * Session middleware for worker runtimes.
 *
 * Need to provide a `StorageArea` to persist the session between requests.
 * See `@worker-tools/kv-storage`.
 *
 */
export declare function storageSession<S extends Rec = Rec>(options: StorageSessionOptions<S>): <X extends CookieContext & Partial<FlushedContext>>(ax: Awaitable<X>) => Promise<X & StorageSessionContext<S>>;
export {};