import { Kernel, Logger } from "oly-core";
import { IPixieSetOptions } from "../interfaces";
/**
 * Use Pixie for handling ServerClient data use cases.
 *
 * For cache http call: PixieHttp.
 * For cache session: PixieSession.
 *
 * Pixie writes server-data into HTML then browser use this data.
 */
export declare class Pixie {
    static stateName: string;
    protected logger: Logger;
    protected kernel: Kernel;
    /**
     * Volatile data
     */
    protected data: {};
    /**
     * Getter
     *
     * @param key
     * @returns {T}
     */
    get<T>(key: string): T;
    /**
     * Set value in pixie;
     * By default, store data only once and only on server env.
     *
     * @param key       Key
     * @param value     Value
     * @param options   only+once
     * @returns {T}
     */
    set<T>(key: string, value: T, options?: IPixieSetOptions): T;
    /**
     * Like set, but for functions.
     *
     * Function will be executed only in Server.
     * ```ts
     * // SERVER
     * pixie.fly(() => "DATA"); // called + cached
     * // BROWSER
     * pixie.fly(() => "DATA"); // use cache, remove cache
     * pixie.fly(() => "DATA"); // called
     * ```
     *
     * Async function with Promise is allowed.
     *
     * @param key     Identifier
     * @param func    Function to call which returns a value
     * @returns       The value
     */
    fly<T>(key: string, func: () => Promise<T> | T): Promise<T>;
    /**
     * Stringify store.
     *
     * @returns {string}
     */
    toString(): string;
    /**
     * Wrap data into <script> tags.
     *
     * @returns {string}
     */
    toHTML(): string;
}