import Decimal from 'decimal.js';
import type { FSTranslationKeys, I18n, MappedCurrencySymbols, NumberLike, TranslationKey, TranslationKeys, Translations } from './types';
export interface ICurrencyValue {
    value: Decimal;
    currencyCode: string;
}
export default class I18nHelper {
    protected readonly i18n: I18n;
    constructor(i18n: I18n);
    protected localeListeners: Array<(locale: string) => void>;
    /**
     * Converts a given number-like value into an actual number
     *
     * @param num - number-like value to be converted
     * @return - Converted number
     */
    protected convertToNumber(num: NumberLike): number;
    /**
     * Lets you override the currency symbol by providing mappedCurrencyCodes:{}
     * in the env file. Ex: mappedCurrencyCodes: { AUD: 'A$'},
     *
     * @param num - Number to be formatted
     * @param [currency] - ISO 4217 code for the currency you're trying to change
     * @return - Formatted number
     */
    protected currencyWithCustomSymbol(num: ICurrencyValue | NumberLike, options: Intl.NumberFormatOptions): string;
    /**
     * Recursively creates a new object matching the structure of the currently set
     * translations with each keys' value replaced by its object path. This object can be
     * used to reference the intended translation key with auto-completion and type checking.
     *
     * @param translations - Translations keys to flatten
     * @param parentTranslations - New object containing the object paths
     * @param paths - Paths to the current translation keys object from the root level
     * @return - New object containing the object paths
     */
    protected flatten(translations: TranslationKeys, parentTranslations?: TranslationKeys, paths?: string[]): TranslationKeys;
    /**
     * Determines if a given value is a translation key
     *
     * @param translationKey - Value to check if it is a translation key
     * @param translationKey.zero
     * @param translationKey.one
     * @param translationKey.other
     * @return - Whether or not the value is a translation key
     */
    protected isTranslationKey(translationKey: TranslationKey | object | undefined): translationKey is TranslationKey;
    /**
     * Recursively merges new string translations into any existing
     *
     * @param translations - A locale-indexed object containing
     * key/value pairs of string translations
     * @return - All possible string translations
     */
    addTranslations<T = TranslationKeys>(translations: Translations): FSTranslationKeys<string> & T;
    /**
     * Recursively merges new currency symbol overrides into any existing
     *
     * @param mappedCurrencyCodes - A locale-indexed object containing
     * key/value pairs of string translations
     * @return - All possible string translations
     * @example FSI18n.addCurrencyOverrides({AUD: 'A$'});
     */
    addCurrencyOverrides<T = TranslationKeys>(mappedCurrencyCodes: MappedCurrencySymbols): FSTranslationKeys<string> & T;
    /**
     * Change language
     *
     * @param locale - Set locale
     */
    setLocale(locale: string): void;
    addLocaleListener(func: (locale: string) => void): void;
    removeLocaleListener(func: (locale: string) => void): void;
    /**
     * Creates an object matching the same structure as the translation definitions
     * object, but with the string translation values replaced by their object path
     *
     * Used for code completion.
     *
     * @return Available string translations
     * @throws MISSING_TRANSLATIONS_ERROR
     */
    getAvailableStringTranslations<T = TranslationKeys>(): T;
    /**
     * Creates an object matching the same structure as the translation definitions
     * object, but with the string translation values replaced by their object path
     *
     * Used for code completion.
     *
     * @return Available string translations
     * @throws MISSING_TRANSLATIONS_ERROR
     */
    getAvailableCurrencySymbolOverrides<T = MappedCurrencySymbols>(): T;
    /**
     * Converts a number-like value into a locale-formatted string
     *
     * @param num - Number to be formatted
     * @param [options] - Options to control how the number is formatted
     * @return - Formatted number
     * @example FSI18n.number(1234); // returns "1,234"
     */
    number(num: NumberLike, options?: Intl.NumberFormatOptions): string;
    /**
     * Converts a number-like value into a locale-formatted currency string
     *
     * @param num - Number to be formatted
     * @param [currency] - ISO 4217 currency code
     * @param [options] - Options to control how the number is formatted
     * @return - Formatted number
     * @example FSI18n.currency(1.23, 'USD'); // returns "$1.23"
     */
    currency(num: ICurrencyValue | NumberLike, currency?: string, options?: Intl.NumberFormatOptions): string;
    /**
     * Converts a number-like value into a locale-formatted percent string
     *
     * @param num - Number to be formatted
     * @param [options] - Options to control how the number is formatted
     * @return - Formatted number
     * @example FSI18n.percent(.12); // returns "12%"
     */
    percent(num: NumberLike, options?: Intl.NumberFormatOptions): string;
    /**
     * Converts a date object into a locale-formatted string
     *
     * @param date - Date object to be formatted
     * @param [options] - Options to control how the date is formatted
     * @return - Formatted date string
     * @example FSI18n.date(new Date()); // returns "6/13/2018"
     */
    date(date: Date, options?: Intl.DateTimeFormatOptions): string;
    /**
     * Returns the language appropriate for a given translationKey
     *
     * @param translationKey - Path to the appropriate key in a translation object
     * @param [options] - Optional options object to
     * allow for interpolation and/or pluralization
     * @return - Localized string
     */
    string(translationKey?: TranslationKey, options?: I18n.TranslateOptions): string;
    /**
     * Returns the current Locale
     *
     * @return Current locale
     */
    currentLocale(): string;
}