import * as Polyglot from 'node-polyglot';
import { ObserverManager } from './ObserverManager';
declare type Observer = () => void;
export declare class LanguageManager extends ObserverManager<Observer> {
    private static sharedInstance?;
    /** Gets the singleton. */
    static getInstance(): LanguageManager;
    /**
     * Current config directory.
     * Actually UUID in editor mode and relative path in release mode.
     */
    private configDir?;
    /** Current active language. */
    private currentLanguage?;
    private configs;
    /** Wrappee i18n manager. */
    private polyglot;
    private constructor();
    /**
     * Gets all available languages.
     * @return Array of language names.
     */
    getLanguages(): string[];
    /**
     * Gets the config dir.
     * Used in editor only.
     */
    getConfigDir(): string | undefined;
    /**
     * Sets the config directory.
     * @param path The directory path.
     */
    setConfigDir(path: string): void;
    /** Clears the language directory. */
    resetConfigDir(): void;
    private updateConfigs;
    private updateLanguage;
    /** Gets the active language. */
    getCurrentLanguage(): string | undefined;
    /** Sets the active language. */
    setCurrentLanguage(language: string | undefined): void;
    /** Gets the language format in the current language. */
    getFormat(key: string): string | undefined;
    parseFormat(key: string, options?: Polyglot.InterpolationOptions): string | undefined;
    /** Detects language for the config path. */
    private parseLanguage;
}
export {};