type Locale = "tr" | "en";
export declare function formatDate(date: Date | string | number | null | undefined, locale?: Locale): string;
export declare function formatDateTime(date: Date | string | number | null | undefined, locale?: Locale): string;
/**
 * Like {@link formatDateTime} but includes seconds — for screens where the exact
 * second matters (e.g. outage start/end on the modem detail screen, FIX-414).
 */
export declare function formatDateTimeWithSeconds(date: Date | string | number | null | undefined, locale?: Locale): string;
export declare function formatNumber(num: number | null | undefined, locale?: Locale): string;
export declare function formatDecimal(num: number, decimals?: number, locale?: Locale): string;
export declare function formatSlug(flag: string, serial: string): string;
export declare function formatRelativeTime(date: Date | string | number | null | undefined, locale?: Locale): string;
export declare function formatPercentage(value: number | undefined | null, decimals?: number): string;
/**
 * Format a duration given in seconds as a human-readable string.
 *
 * - < 60 s         → "{N} sn" (1 decimal place if non-integer)
 * - < 3600 s       → "{M} dk {S} sn" (S omitted when zero)
 * - >= 3600 s      → "{H} sa {M} dk" (M omitted when zero)
 *
 * Negative or non-finite inputs return "--".
 */
export declare function formatDuration(seconds: number | null | undefined, locale?: Locale): string;
export {};
//# sourceMappingURL=formatters.d.ts.map