import { Optional } from "../lang-utils/core";
import { Option } from "../lang-utils/rust-lang-utils";
import { Counter } from "./counter";
import { State, TimerTickFn } from "./externals";
import { TimerInternal } from "./internals";
export declare const NoDuration = -1;
export declare class TimerImpl implements TimerInternal {
    readonly name: string;
    readonly delayMs: number;
    readonly durationMs: number;
    readonly counter?: Counter | undefined;
    /**
     * Node.js uses Timeout and browser uses number. ReturnType<typeof setTimeout> handles this 🎉.
     *
     * More info:
     * - https://tinyurl.com/y2bssbfr
     * - https://stackoverflow.com/a/56970244/2085356
     * @private
     */
    private timerHandle?;
    private _state;
    private _onTickFn;
    private _onStopFn;
    private _onStartFn;
    constructor(name: string, delayMs: number, durationMs?: number, counter?: Counter | undefined);
    getOnStopFn(): Option<TimerTickFn>;
    setOnStopFn(fn: Optional<TimerTickFn>): void;
    getOnStartFn(): Option<TimerTickFn>;
    setOnStartFn(value: Optional<TimerTickFn>): void;
    getOnTickFn(): Option<TimerTickFn>;
    setOnTickFn(fn: Optional<TimerTickFn>): void;
    /**
     * Computes the new state using `TimerReducer.reducerFn` and puts it `this.state` property.
     * @param action if not provided compute initial state, else use it to get new state
     * @return new state object
     */
    private dispatch;
    startTicking: () => this;
    stopTicking: () => this;
    get isStopped(): boolean;
    get isRunning(): boolean;
    get isCreatedAndNotStarted(): boolean;
    get state(): State;
    actuallyStart: () => void;
    actuallyStop: () => void;
    toString: () => string;
}