/**
 * Copyright 2026, Optimizely
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { Client, OptimizelyUserContext } from '@optimizely/optimizely-sdk';
import type { UserInfo } from '../provider';
export interface UserContextManagerConfig {
    client: Client;
    onUserContextChange: (ctx: OptimizelyUserContext | null) => void;
    onError: (error: Error) => void;
}
/**
 * Manages user context creation, VUID resolution, and ODP segment fetching.
 *
 * Handles async operations with staleness checks so that rapid user changes
 * only result in the latest request's callback being fired. Previous in-flight
 * operations are abandoned via a requestId counter.
 *
 * Internally tracks previous user, segments, and skipSegments values to
 * short-circuit when nothing has changed.
 */
export declare class UserContextManager {
    private readonly client;
    private readonly onUserContextChange;
    private readonly onError;
    private readonly meta;
    private requestId;
    private disposed;
    private initialized;
    private skipSegments;
    private prevUser?;
    private prevSegments?;
    constructor(config: UserContextManagerConfig);
    /**
     * Resolves whether user context needs to be (re)created based on
     * value-equality of user, qualifiedSegments, and skipSegments.
     * Short-circuits if nothing has changed since the previous call.
     *
     * @param user - Optional user info (id and attributes)
     * @param qualifiedSegments - Optional pre-fetched segments. When provided,
     * @param skipSegments - Whether to skip ODP segment fetching (default: false)
     */
    resolveUserContext(user?: UserInfo | null, qualifiedSegments?: string[], skipSegments?: boolean): void;
    /**
     * Disposes the manager, preventing any future callbacks from firing.
     */
    dispose(): void;
    private createUserContext;
    private isStale;
}