import { Decision, FeatureFlagDecision, HackleEvent, HackleRemoteConfig, User } from "./internal/model/model";
import { PropertyOperations } from "../hackle/property/PropertyOperations";
import { HackleExperiment } from "../public/model";
export default interface HackleClient {
    /**
     * Determine the variation to expose to the user for experiment.
     *
     * This method return the {"A"} if:
     * - The experiment key is invalid
     * - The experiment has not started yet
     * - The user is not allocated to the experiment
     * - The determined variation has been dropped
     *
     * @param experimentKey     the unique key of the experiment.
     * @param user              the user to participate in the experiment. MUST NOT be null.
     * @param defaultVariation  the default variation of the experiment.
     *
     * @return string           the decided variation for the user, or the default variation.
     */
    variation(experimentKey: number, user: User | string, defaultVariation?: string): string;
    /**
     * Determine the variation to expose to the user for experiment, and returns an object that
     * describes the way the variation was determined.
     *
     * @param experimentKey    the unique key of the experiment.
     * @param user             the user to participate in the experiment. MUST NOT be null. (e.g. { id: "userId"} )
     * @param defaultVariation the default variation of the experiment. MUST NOT be null.
     *
     * @return {Decision} object
     */
    variationDetail(experimentKey: number, user: User | string, defaultVariation?: string): Decision;
    /**
     * Determine whether the feature is turned on to the user.
     *
     * @param featureKey the unique key for the feature.
     * @param user       the user requesting the feature.
     *
     * @return boolean True if the feature is on. False if the feature is off.
     *
     * @since 2.0.0
     */
    isFeatureOn(featureKey: number, user: User | string): boolean;
    /**
     * Determine whether the feature is turned on to the user, and returns an object that
     * describes the way the value was determined.
     *
     * @param featureKey the unique key for the feature.
     * @param user     the identifier of user.
     *
     * @return {FeatureFlagDecision}
     *
     * @since 2.0.0
     */
    featureFlagDetail(featureKey: number, user: User | string): FeatureFlagDecision;
    /**
     * Records the event that occurred by the user.
     *
     * @param event the unique key of the event that occurred. MUST NOT be null.
     * @param user  the user that occurred the event. MUST NOT be null.
     */
    track(event: HackleEvent | string, user: User | string): void;
    /**
     * Returns a instance of Hackle Remote Config.
     *
     * @param user     the identifier of user.
     */
    remoteConfig(user: User | string): HackleRemoteConfig;
    /**
     * Updates the user's properties.
     *
     * @param operations Property operations to update user properties.
     * @param user the user whose properties will be updated
     *
     */
    updateUserProperties(operations: PropertyOperations, user: User | string): void;
    getExperiment(experimentKey: number): HackleExperiment | undefined;
    /**
     * @deprecated use onInitialized instead.
     * @param block callback function.
     * @param timeout
     */
    onReady(block: () => void, timeout?: number): void;
    onInitialized(config?: {
        timeout?: number;
    }): Promise<{
        success: boolean;
    }>;
    close(): void;
}