import type { ILocalization, LocaleStrings, StringsDataSource } from './abstractions.js';
import type { AnyObject } from '../types/misc.js';
import { type EventHandler } from '../observing/event.js';
export declare class LocalizationManager<TLocaleType extends string, TStrings extends AnyObject> implements ILocalization<TStrings> {
    private readonly _dataSource;
    private _currentLocale;
    private _currentStrings;
    private readonly _localeUpdatedEvent;
    private readonly _firstInit;
    constructor(_dataSource: StringsDataSource<TLocaleType, TStrings>, locale: TLocaleType, fallbackStrings?: TStrings | null);
    get Locale(): TLocaleType;
    get Current(): TStrings;
    get firstInitialized(): Promise<void>;
    get localeUpdated(): import("../observing/event.js").IEvent<LocaleStrings<TLocaleType, TStrings>>;
    /**
     * Updates locale synchronously, and then loads corresponding strings from datasource.
     * If loader for the locale is sync, this method updates instantly and returns resolved Promise.
     * Otherwise, strings will be updated asynchronously.
     */
    useLocale(locale: TLocaleType): Promise<void>;
    /**
     * Subscribes `handler` to `this.localUpdated` event and also calls it immeditately.
     *
     * @returns unsubscribe function
     */
    synchronizeLocale(handler: EventHandler<LocaleStrings<TLocaleType, TStrings>>): () => void;
    protected doUpdateStrings(locale: TLocaleType, strings: TStrings | null, revert?: () => void): Promise<void>;
}