/**
 * Time-of-day greeting key.
 * Maps to bundled i18n keys in `_global` namespace: goodMorning / goodAfternoon / goodEvening.
 */
export type TimeOfDayKey = 'goodMorning' | 'goodAfternoon' | 'goodEvening';
/**
 * Returns the i18n key for a time-of-day greeting based on the given date's hour.
 *
 * - 00:00 - 11:59 → 'goodMorning'
 * - 12:00 - 17:59 → 'goodAfternoon'
 * - 18:00 - 23:59 → 'goodEvening'
 *
 * Pure function (testable). Defaults to current local time.
 *
 * @example
 * import { getTimeOfDayKey } from 'valtech-components';
 *
 * const key = getTimeOfDayKey();          // 'goodMorning' | 'goodAfternoon' | 'goodEvening'
 * const text = i18n.t(key);               // 'Buenos días' | 'Buenas tardes' | 'Buenas noches'
 */
export declare function getTimeOfDayKey(date?: Date): TimeOfDayKey;
/** Hora corta local, ej. "14:05". */
export declare function formatClockTime(value: Date | string | undefined | null, locale?: string): string;
/**
 * Etiqueta corta para listas de conversaciones (estilo Telegram/WhatsApp):
 * hoy → hora ("14:05"), ayer → label `yesterday`, esta semana → día de semana,
 * más viejo → fecha corta. `labels.today/yesterday` se inyectan ya traducidos.
 */
export declare function formatRelativeTime(value: Date | string | undefined | null, locale?: string, labels?: {
    today?: string;
    yesterday?: string;
}): string;
/**
 * Etiqueta para separadores de fecha dentro de un chat: "Hoy" / "Ayer" /
 * fecha larga ("12 de junio de 2026"). `labels.today/yesterday` ya traducidos.
 */
export declare function formatDateSeparator(value: Date | string | undefined | null, locale?: string, labels?: {
    today?: string;
    yesterday?: string;
}): string;