/**
 * The wrapper of the SPExperiment modules in \@ms/sp-experiment.
 * see https://onedrive.visualstudio.com/OneDriveWeb/_git/odsp-common?path=%2Fsp-experiments%2FREADME.md&version=GBmaster&_a=preview
 */
/**
 * @internal
 */
export interface IExperimentContext {
    /**
     * Assignment information and metadata for active Flights on Rails experiments, in a compressed format.
     */
    readonly experimentData: string;
    /**
     * Additional assignment information and metadata for active Flights on Rails experiments, in a compressed format.
     */
    readonly experimentDataLookup: string[];
    /**
     * Server time when page was pushed to client.
     */
    readonly serverTime: string;
    /**
     * Unique site identifier, used for caching logic.
     */
    readonly siteId?: string;
    /**
     * Unique user identifier, used for caching logic.
     */
    readonly aadUserId?: string;
}
/**
 * We don't want people to use _getVariantWithoutLogging except in SPPerfExperiment, so this interface is to keep
 * that function private.
 *
 * @internal
 */
export interface IPrivateSPExperiment {
    _getVariantWithoutLogging(experimentId: number): number;
}
/**
 * The wrapper of sp-experiment to check experiment status in sp-client.
 *
 * @internal
 */
export declare class SPExperiment {
    /**
     * The experiment overrides where key is experiment id and value is the variant.
     * RESERVED FOR INTERNAL USAGE. This is only supposed to be used by SPPerfExperiment to
     * share debug experiment overrides. Production code should not access it.
     * It will be undefined debug experiments are not supported.
     */
    static experimentOverrides: Map<number, number> | undefined;
    private static _experimentContext;
    private static _isInitialized;
    /**
     * Initialize/Re-initialize experiments with latest page context info.
     * @param experimentContext - The context to identify the experiment environment.
     */
    static initialize(experimentContext: IExperimentContext): void;
    /**
     * @internal
     * Retrieves the variant assignment for the given Flights on Rails experiment from the given page context.
     * This method automatically logs the assignment data to the experiment stream, so it is crucial that
     * this method is called only when the differences between variants would become visible to the end user.
     * If the assignment must be retrieved earlier, call getExperiment to get an ISpExperiment
     * object and use variantToDisplay and logExposure() at the appropriate times.
     * @param experimentId - The automatically generated experiment id in Flights on Rails.
     *  Check the flighting page at aka.ms/flightsui to find this value.
     * @returns The variant to display to the end user. A value of 0 indicates that the original, control
     *  experience should be shown, whereas a value of n greater than 0 indicates that the nth treatment
     *  group should be shown.
     */
    static getVariantAndLogExposure(experimentId: number): number;
    /**
     * RESERVED FOR INTERNAL USAGE.  This method is invoked automatically by the system shell.
     * The application code should not call it directly.
     *
     * @param expOverrides - The experiment overrides string.
     * e.g. '[[90023,1],[90034,0]]' which means experiment 90023 will be forced on treatment experience and
     *  experiment 90034 will be forced on control experience.
     */
    static setDebugExperiments(expOverrides: string): void;
    /**
     * @internal
     * DO NOT USE UNLESS THERE IS NO NEED FOR SCORECARDS - this API will not log exposure to the experiment
     * Retrieves the variant assignment for the given Flights on Rails experiment from the given page context. This method does not log exposure
     * to the experiment, only returns the variant. This should be used only in cases where you want to retrieve the assignment, but do not want
     * the data to be logged. When using this API, the experimentation dashboard at aka.ms/odspexp and the automated SRM detection would
     * also be unavailable.
     * @param experimentId - The automatically generated experiment id in Flights on Rails. Check the flighting page at aka.ms/flightsui to find
     * this value.
     * @returns The variant to display to the end user. A value of 0 indicates that the original, control experience should be shown, whereas
     * a value of n \> 0 indicates that the nth treatment group should be shown.
     */
    private static _getVariantWithoutLogging;
}
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