import type { Strong } from '@toreda/strong-types';
import { Log } from '@toreda/log';
import type { Time } from '../time';
import type { TimeUnit } from './unit';
/**
 * Internal state data created and wrapped by Time instances.
 */
export declare class TimeData {
    readonly units: Strong<TimeUnit>;
    private readonly value;
    readonly log: Log;
    constructor(units: TimeUnit, value: number, log?: Log | null);
    private makeLog;
    /**
     * Get the current time value in instance's native time unit.
     * @returns
     */
    get(): number;
    set(caller: Time, input?: number | Time | null): Time;
    /**
     * Add number input to current value.
     * @param caller		Time instance calling this method.
     * @param input			number value to be added.
     * @returns				Returns the Time instance which invoked the function
     *						to support method chaining.
     */
    addNumber(caller: Time, input?: number | null): Time;
    /**
     * Subtract number input from the current value.
     * @param caller		Time instance calling this method.
     * @param input			number value to be subtracted.
     * @returns				Returns the Time instance which invoked the function
     *						to support method chaining.
     */
    subNumber(caller: Time, input?: number | null): Time;
    /**
     * Get numeric unit value from a Time or number input. Time inputs are converted from
     * their native TimeUnit to the TimeUnit specified by the `convertTo` arg.
     * @param convertTo
     * @param input
     * @returns
     */
    getUnitValue(convertTo: TimeUnit, input?: Time | number | null): number | null;
    /**
     * Convert value from specified units into object's native time units, then
     * subtract it from the current value.
     * @param caller		Time instance calling this method.
     * @param input			number value to be added.
     * @returns				Returns the Time instance which invoked the function
     *						to support method chaining.
     */
    subUnit(caller: Time, units: TimeUnit, value?: number | null, decimals?: number): Time;
    /**
     * Convert value from provided unit type into object's native time units and
     * add it to the current value.
     * @param caller		Time instance calling this function to be returned by function.
     * @param units			Time Unit of provided value.
     * @param value			Value to be converted and added to current time.
     * @param decimals		Number of decimals to include in final added value.
     * @returns
     */
    addUnit(caller: Time, units: TimeUnit, value?: number | null, decimals?: number): Time;
    /**
     * Invert current value's sign.
     * @param caller
     * @param posOnly
     * @returns
     */
    invert(caller: Time, posOnly?: boolean): Time;
    timeSinceTime(target: Time): Time | null;
    timeSinceNumber(target: number): Time | null;
    /**
     * Get time object containing time left until target time. May return
     * negative vamlue when target time is in the past. The returned time
     * object's time left value uses the same time units as the calling instance.
     * @param time
     * @returns
     */
    timeUntilTime(time?: Time | null): Time | null;
    /**
     * Get time remaining until target unix timestamp.
     * @param target
     * @returns
     */
    timeUntilNumber(target?: number | null): Time | null;
    /**
     * Reset internal state variables to their initial values.
     * @param caller
     * @returns
     */
    reset(caller: Time): Time;
}