import { DetectTimezoneResult } from '@multisystemsuite/timezone-engine-shared-types';

/** Detect timezone in browser environment */
declare function detectBrowserTimezone(): DetectTimezoneResult;
/** Detect timezone in Node.js environment */
declare function detectNodeTimezone(): DetectTimezoneResult;
/** Detect server timezone */
declare function detectServerTimezone(defaultTimezone?: string): DetectTimezoneResult;
/** Universal timezone detection — SSR-safe */
declare function detectTimezone(fallback?: string): DetectTimezoneResult;
/** Get user's current timezone */
declare function getUserTimezone(fallback?: string): string;
/** Resolve timezone from header, cookie, or query param value */
declare function resolveTimezoneFromValue(value: string | undefined, fallback?: string): DetectTimezoneResult;
/**
 * Validate that a timezone string (after normalisation) is a valid IANA id
 * recognised by the runtime Intl implementation.
 */
declare function isValidTimezone(timeZone: string | null | undefined): boolean;
/** List all supported IANA timezones via Intl */
declare function listSupportedTimezones(): string[];

export { detectBrowserTimezone, detectNodeTimezone, detectServerTimezone, detectTimezone, getUserTimezone, isValidTimezone, listSupportedTimezones, resolveTimezoneFromValue };