/**
 * Copyright 2018-2019, 2022-2024, 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 { UserAttributes, OptimizelyDecideOption } from '@optimizely/optimizely-sdk';
import { ReactSDKClient, VariableValuesObject } from './client';
import { OptimizelyDecision } from './utils';
export declare const hooksLogger: import("@optimizely/optimizely-sdk/dist/modules/logging").LoggerFacade;
type HookOptions = {
    autoUpdate?: boolean;
    timeout?: number;
};
type DecideHooksOptions = HookOptions & {
    decideOptions?: OptimizelyDecideOption[];
};
type HookOverrides = {
    overrideUserId?: string;
    overrideAttributes?: UserAttributes;
};
type ClientReady = boolean;
type DidTimeout = boolean;
interface ExperimentDecisionValues {
    variation: string | null;
}
interface FeatureDecisionValues {
    isEnabled: boolean;
    variables: VariableValuesObject;
}
interface UseExperiment {
    (experimentKey: string, options?: HookOptions, overrides?: HookOverrides): [ExperimentDecisionValues['variation'], ClientReady, DidTimeout];
}
interface UseFeature {
    (featureKey: string, options?: HookOptions, overrides?: HookOverrides): [FeatureDecisionValues['isEnabled'], FeatureDecisionValues['variables'], ClientReady, DidTimeout];
}
interface UseDecision {
    (featureKey: string, options?: DecideHooksOptions, overrides?: HookOverrides): [OptimizelyDecision, ClientReady, DidTimeout];
}
interface UseTrackEvent {
    (): [(...args: Parameters<ReactSDKClient['track']>) => void, boolean, boolean];
}
/**
 * A React Hook that retrieves the variation for an experiment, optionally
 * auto updating that value based on underlying user or datafile changes.
 *
 * Note: The react client can become ready AFTER the timeout period.
 *       ClientReady and DidTimeout provide signals to handle this scenario.
 */
export declare const useExperiment: UseExperiment;
/**
 * A React Hook that retrieves the status of a feature flag and its variables, optionally
 * auto updating those values based on underlying user or datafile changes.
 *
 * Note: The react client can become ready AFTER the timeout period.
 *       ClientReady and DidTimeout provide signals to handle this scenario.
 */
export declare const useFeature: UseFeature;
/**
 * A React Hook that retrieves the flag decision, optionally
 * auto updating those values based on underlying user or datafile changes.
 *
 * Note: The react client can become ready AFTER the timeout period.
 *       ClientReady and DidTimeout provide signals to handle this scenario.
 */
export declare const useDecision: UseDecision;
export declare const useTrackEvent: UseTrackEvent;
export {};