import type { ReactNode } from 'react';
import type { DateOrder } from '../../DateFormatProvider/context';
export type ChartTimeOrder = DateOrder;
export type ChartHourCycle = 12 | 24;
export interface ChartTimeFormatterOptions {
    order?: ChartTimeOrder;
    hourCycle?: ChartHourCycle;
}
/** `14:32` (24h) / `2:32 PM` (12h). Empty string for invalid input. */
export declare const formatChartHour: (value: unknown, options?: {
    hourCycle?: ChartHourCycle;
}) => string;
/** `24 Jan` (day-first) / `Jan 24` (month-first). Year is omitted — axis space is precious. */
export declare const formatChartDate: (value: unknown, options?: {
    order?: ChartTimeOrder;
}) => string;
/** Combined `24 Jan 14:32`. Respects both `order` and `hourCycle`. */
export declare const formatChartDateTime: (value: unknown, options?: ChartTimeFormatterOptions) => string;
/** `GMT±N` / `UTC`. Delegates to the shared `utils/formatDateTime` helper. */
export declare const formatChartTimezone: (value: unknown) => string;
/**
 * Wrap a string formatter so it appends a dimmed timezone chip. Returns a
 * `ReactNode` so it can be passed to tooltip / zoom-popover slots.
 */
export declare const withTimezoneChip: (formatter: (value: unknown) => string) => ((value: unknown) => ReactNode);