import { DeepPartial, TimerCallback, TimerId } from './types';
import { DowntimerOptions } from './options';
import { StackFrame } from './stackTrace';
/** Internal timer info type */
export type TimerInfo = {
    /** The callback to call when the timer fires */
    callback: () => void;
    /** The UNIX timestamp (in ms) when the timer was scheduled */
    scheduledAt: number;
    /** The UNIX timestamp (in ms) for when the timer should fire */
    scheduledFor: number;
    /** User-facing timer ID */
    externalId: TimerId;
    /** Internal timer ID */
    internalId: ReturnType<typeof setTimeout>;
    /** Stack trace of the code that scheduled the timer */
    scheduleStackTrace: StackFrame[];
};
/** The Downtimer class, which acts as a timer manager */
export declare class Downtimer {
    #private;
    /**
     * Create a new Downtimer manager object.
     *
     * Importantly, this manager can only access timers that it scheduled. As such, creating a new
     * `downtimer` object elsewhere in your code won't allow you to clear timers scheduled using a
     * different timer manager. As such, it may be best to create a single global `downtimer` manager
     * which you use across your entire codebase.
     *
     * @param options Options for the `Downtimer` object, including settings for logging.
     */
    constructor(options?: DeepPartial<DowntimerOptions>);
    /**
     * Schedule a callback function to be executed after the given amount of time has elapsed. This
     * function returns immediately, meaning that the scheduled callback will be executed after any
     * following code.
     *
     * @param callback callback function to schedule
     * @param ms amount of time to wait before calling the callback.
     *
     * @returns a timer ID which can be used to cancel the scheduled timer. You should store this
     * timer ID somewhere in your data structures if there is a chance that you'll need to cancel it
     * later.
     */
    schedule(callback: TimerCallback, ms: number): TimerId;
    /**
     * Cancel the scheduled callback function associated with the given timer ID. If the callback
     * hasn't been run yet, it will be cancelled and will never run.
     *
     * If the scheduled callback has already been run, or does not exist, a warning will be logged to
     * the console. Importantly, no exception will be thrown.
     *
     * Note that the scheduled timer must be cancelled using the `downtimer` manager that scheduled
     * it. Other `downtimer` manager instances will log a "timer not found" warning.
     *
     * @param timerId ID of timer to clear
     */
    clear(timerId: TimerId): void;
    /**
     * Cancel all outstanding callback functions.
     *
     * This cancels all scheduled timers managed by this `downtimer` object. Note that timers
     * scheduled by other `downtimer` manager objects won't be cleared.
     */
    clearAll(): void;
}
/**
 * Create a new Downtimer manager object.
 *
 * Importantly, this manager can only access timers that it scheduled. As such, creating a new
 * `downtimer` object elsewhere in your code won't allow you to clear timers scheduled using a
 * different timer manager. As such, it may be best to create a single global `downtimer` manager
 * which you use across your entire codebase.
 *
 * @param options Options for the `Downtimer` object, including settings for logging.
 */
export declare function downtimer(options?: DeepPartial<DowntimerOptions>): Downtimer;