/**
 * Copyright 2019, 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
 *
 * http://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 * as optimizely from '@optimizely/optimizely-sdk';
export type UserInfo = {
    id: string | null;
    attributes?: optimizely.UserAttributes;
};
export interface OptimizelyDecision extends Omit<optimizely.OptimizelyDecision, 'userContext'> {
    userContext: UserInfo;
}
export declare function areUsersEqual(user1: UserInfo, user2: UserInfo): boolean;
/**
 * Equality check applied to override user attributes passed into hooks. Used to determine when we need to recompute
 * a decision because a new set of override attributes was passed into a hook.
 * @param {UserAttributes|undefined} oldAttrs
 * @param {UserAttributes|undefined} newAttrs
 * @returns boolean
 */
export declare function areAttributesEqual(maybeOldAttrs: unknown, maybeNewAttrs: unknown): boolean;
export declare function createFailedDecision(flagKey: string, message: string, user: UserInfo): OptimizelyDecision;
export declare function sprintf(format: string, ...args: any[]): string;
/**
 * 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 Array of qualified segment names, empty array if no segments configured,
 *          or null if ODP is not integrated or the fetch fails.
 *
 * @example
 * ```ts
 * const segments = await getQualifiedSegments('user-123', datafile);
 * if (segments) {
 *   console.log('Qualified segments:', segments);
 * }
 * ```
 */
export declare function getQualifiedSegments(userId: string, datafile: string | Record<string, any>): Promise<string[] | null>;