import type { AppTimeFormat } from "./time-formats.js";
import type { AppDateFormat } from "./date-formats.js";
/**
 * A UI locale: any REGISTERED BCP-47 tag (`registerLocale`) — sent as `x-locale` to the backend.
 *
 * v32 widened it from the closed union `"vi" | "en" | "ja"` (gh#1219); those three remain
 * pre-registered and are named by {@link BuiltInLocale}.
 */
export type AppLocale = string;
/** The locales the library ships packs (messages + date adapters) for. */
export type BuiltInLocale = "vi" | "en" | "ja";
/** IANA timezone identifier — sent as `x-timezone` to backend. */
export type AppTimezone = string;
/** How to resolve the initial timezone when nothing is stored. */
export type AppTimezoneDefault = "browser" | "system" | (AppTimezone & {});
export type { AppTimeFormat } from "./time-formats.js";
export type { AppDateFormat } from "./date-formats.js";
export { APP_TIME_FORMATS, APP_REQUEST_HEADER_TIME_FORMAT, getTimePattern, isAppTimeFormat, } from "./time-formats.js";
export { APP_DATE_FORMATS, APP_REQUEST_HEADER_DATE_FORMAT, getDatePattern, getDateTimePattern, isAppDateFormat, } from "./date-formats.js";
/** The built-in locales. For everything registered at runtime, read `getRegisteredLocales()`. */
export declare const APP_LOCALES: readonly ["vi", "en", "ja"];
export declare const APP_REQUEST_HEADER_LOCALE: "x-locale";
export declare const APP_REQUEST_HEADER_TIMEZONE: "x-timezone";
export type AppRequestHeaders = {
    "x-locale": AppLocale;
    "x-timezone": AppTimezone;
    "x-time-format": AppTimeFormat;
    "x-date-format": AppDateFormat;
};