/**
 * 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 { UserInfo } from '../provider/types';
/**
 * Compares two string arrays for value equality (order-insensitive).
 * Used to prevent redundant user context creation when the segments prop
 * is referentially different but value-equal.
 */
export declare function areSegmentsEqual(a?: string[], b?: string[]): boolean;
/**
 * Compares two UserInfo objects for value equality.
 * Used to prevent redundant user context creation when the user prop
 * is referentially different but value-equal.
 */
export declare function areUsersEqual(user1?: UserInfo | null, user2?: UserInfo | null): boolean;
export interface QualifiedSegmentsResult {
    segments: string[];
    error: Error | null;
}
/**
 * Fetches qualified ODP segments for a user given a datafile and user ID.
 *
 * This is a standalone, self-contained utility that:
 * 1. Parses the datafile to extract ODP configuration (apiKey, apiHost)
 * 2. Collects all ODP segments referenced in audience conditions
 * 3. Queries the ODP GraphQL API
 * 4. Returns only the segments where the user is qualified
 *
 * @param userId - The user ID to fetch qualified segments for
 * @param datafile - The Optimizely datafile (JSON object or string)
 * @returns Object with `segments` (qualified segment names) and `error` (null on success).
 *
 * @example
 * ```ts
 * const { segments, error } = await getQualifiedSegments('user-123', datafile);
 * if (!error) {
 *   console.log('Qualified segments:', segments);
 * }
 * ```
 */
export declare function getQualifiedSegments(userId: string, datafile: string | Record<string, any>): Promise<QualifiedSegmentsResult>;