/// <reference types="node" />
import { EventEmitter } from "events";
import { IAutoUpdateConfig } from "./AutoUpdateConfig";
import { AutoUpdateService } from "./AutoUpdateService";
import { IUser } from "./User";
export interface IFloodGateClient {
    IsReady(): boolean;
    FetchValue(key: string, defaultValue: any, callback: (value: any) => void, user?: IUser): any;
    GetValue(key: string, defaultValue: any, user?: IUser): any;
}
export declare class FloodGateClient extends EventEmitter implements IFloodGateClient {
    private isReady;
    config: IAutoUpdateConfig;
    service: AutoUpdateService;
    user?: IUser;
    constructor(_config: IAutoUpdateConfig);
    IsReady(): boolean;
    /**
     * Return a value of the requested flag or the default value
     * Fetch data from remote server if not available in cache
     * @param {string} _key - Flag key
     * @param {string} _defaultValue - Default value to return to the client if no flag is found
     * @param callback - Client callback method
     * @param _user - User to evaluate against
     */
    FetchValue(_key: string, _defaultValue: any, callback: (value: any) => void, _user?: IUser): any;
    /**
     * Return a value of the requested flag or the default value.
     *
     * This method does not use callbacks, if the value is not present in the cache then the
     * default value is returned or if the client is not ready an error is thrown.
     * @param {string} _key - Flag key
     * @param {string} _defaultValue - Default value to return to the client if no flag is found
     * @param _user - User to evaluate against
     */
    GetValue(_key: string, _defaultValue: any, _user?: IUser): any;
    /**
     * Forces client to update flags from remote server
     */
    ForceRefresh(): void;
}