import type { Auth, OpaqueSession } from '@microsoft/rayfin-auth';
import type { FabricAuthOptions } from './types.js';
/**
 * Detects embedded mode from the `fabricEmbedded` option, the
 * `?fabricEmbedded=true` URL query parameter, or a previously stored
 * `sessionStorage` flag.
 *
 * Delegates to `@microsoft/fabric-embedded-host` for the actual
 * detection logic.  `FabricAuthOptions` satisfies the shared
 * `EmbeddedModeOptions` interface.
 */
export declare function isEmbeddedMode(options: FabricAuthOptions): boolean;
/**
 * Returns whether an embedded postMessage handoff has already completed during this page load.
 */
export declare function hasEmbeddedHandoffCompleted(): boolean;
/**
 * Marks that an embedded postMessage handoff has completed for this page load.
 */
export declare function markEmbeddedHandoffCompleted(): void;
/**
 * Clears the embedded-handoff completion flag.
 *
 * @internal Test helper. Not exported from the package barrel.
 */
export declare function resetEmbeddedHandoffStateForTests(): void;
/**
 * Attempts to resume an existing session without any user interaction.
 *
 * 1. Returns the current session if already authenticated.
 * 2. If a refresh token is available, tries `auth.refreshSession()` and
 *    returns the refreshed session on success.
 * 3. Returns `null` when neither path produces an authenticated session.
 *
 * This helper never opens windows, popups, or postMessage channels —
 * it is always safe to call on page load.
 */
export declare function tryResumeSession(auth: Auth): Promise<OpaqueSession | null>;
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