import { ExperimentAnalyticsProvider } from './types/analytics';
import { ExposureTrackingProvider } from './types/exposure';
import { ExperimentUserProvider } from './types/provider';
import { Source } from './types/source';
import { HttpClient } from './types/transport';
import { Variant, Variants } from './types/variant';
/**
 * @category Configuration
 */
export interface ExperimentConfig {
    /**
     * Debug all assignment requests in the UI Debugger and log additional
     * information to the console. This should be false for production builds.
     */
    debug?: boolean;
    /**
     * The name of the instance being initialized. Used for initializing separate
     * instances of experiment or linking the experiment SDK to a specific
     * instance of the amplitude analytics SDK.
     */
    instanceName?: string;
    /**
     * The default fallback variant for all {@link ExperimentClient.variant}
     * calls.
     */
    fallbackVariant?: Variant;
    /**
     * Initial values for variants. This is useful for bootstrapping the
     * client with fallbacks and values evaluated from server-side rendering.
     * @see Variants
     */
    initialVariants?: Variants;
    /**
     * Initial values for flags. This is useful for bootstrapping the
     * client with fallbacks for flag configs.
     */
    initialFlags?: string;
    /**
     * Determines the primary source of variants and variants before falling back.
     * @see Source
     */
    source?: Source;
    /**
     * The domain from which to request variants using remote evaluation.
     */
    serverUrl?: string;
    /**
     * The domain to request flag configurations used in local evaluation from.
     */
    flagsServerUrl?: string;
    /**
     * The amplitude data center to fetch flags and variants from. If set,
     * automatically sets the {@link serverUrl} and {@link flagsServerUrl}
     * configurations.
     */
    serverZone?: string;
    /**
     * The request timeout, in milliseconds, when fetching variants.
     */
    fetchTimeoutMillis?: number;
    /**
     * Set to true to retry fetch requests in the background if the initial
     * requests fails or times out.
     */
    retryFetchOnFailure?: boolean;
    /**
     * If true, automatically tracks exposure events though the
     * `ExperimentAnalyticsProvider`. If no analytics provider is set, this
     * option does nothing.
     */
    automaticExposureTracking?: boolean;
    /**
     * Enable or disable local evaluation flag configuration polling on `start()`.
     */
    pollOnStart?: boolean;
    /**
     * The interval to poll local evaluation flag configurations on `start()`.
     * Only used if `pollOnStart` is `true`. Minimum 60000.
     */
    flagConfigPollingIntervalMillis?: number;
    /**
     * Explicitly enable or disable calling {@link fetch()} on {@link start()}:
     *
     *  - `true`:      fetch will always be called on start.
     *  - `false`:     fetch will never be called on start.
     *  - `undefined`: fetch will always be called on start.
     */
    fetchOnStart?: boolean;
    /**
     * This config only matters if you are using the amplitude analytics SDK
     * integration initialized by calling
     * `Experiment.initializeWithAmplitudeAnalytics()`.
     *
     * If true, the `ExperimentClient` will automatically fetch variants when the
     * user's identity changes. The user's identity includes user_id, device_id
     * and any user properties which are `set`, `unset` or `clearAll`ed via a call
     * to `identify()`.
     *
     * Note: Non-idempotent identify operations `setOnce`, `add`, `append`, and
     * `prepend` are not counted towards the user identity changing.
     */
    automaticFetchOnAmplitudeIdentityChange?: boolean;
    /**
     * Sets a user provider that will inject identity information into the user
     * for {@link fetch()} requests. The user provider will only set user fields
     * in outgoing requests which are null or undefined.
     *
     * See {@link ExperimentUserProvider} for more details
     */
    userProvider?: ExperimentUserProvider;
    /**
     * Provides a analytics implementation for standard experiment events
     * generated by the client (e.g. {@link ExposureEvent}).
     *
     * @deprecated Use exposureTrackingProvider instead
     */
    analyticsProvider?: ExperimentAnalyticsProvider;
    /**
     * Provides the ability to track exposure events through a 3rd party analytics
     * implementation.
     */
    exposureTrackingProvider?: ExposureTrackingProvider;
    /**
     * (Advanced) Use your own http client.
     */
    httpClient?: HttpClient;
}
/**
 Defaults for Experiment Config options

 | **Option**       | **Default**                       |
 |------------------|-----------------------------------|
 | **debug**        | `false`                           |
 | **instanceName** | `$default_instance` |
 | **fallbackVariant**         | `null`                 |
 | **initialVariants**         | `null`                 |
 | **initialFlags**         | `undefined`                 |
 | **source** | `Source.LocalStorage` |
 | **serverUrl**    | `"https://api.lab.amplitude.com"` |
 | **flagsServerUrl**    | `"https://flag.lab.amplitude.com"` |
 | **serverZone**    | `"US"` |
 | **assignmentTimeoutMillis**    | `10000` |
 | **retryFailedAssignment**    | `true` |
 | **automaticExposureTracking** | `true` |
 | **pollOnStart** | `true` |
 | **flagConfigPollingIntervalMillis** | `300000` |
 | **fetchOnStart** | `true` |
 | **automaticFetchOnAmplitudeIdentityChange** | `false` |
 | **userProvider**    | `null` |
 | **analyticsProvider**    | `null` |
 | **exposureTrackingProvider**    | `null` |

 *
 * @category Configuration
 */
export declare const Defaults: ExperimentConfig;