import { ColorScheme, SettableColorKey, Version } from './types';
import { Bridge } from '../Bridge';
import { RGBColor } from 'twa-core';
import { WebAppEventsMap } from './events';
/**
 * Provides functionality which is recognized as common for Web Apps. In other
 * words, this class mostly contains utilities.
 */
export declare class WebApp {
    private bridge;
    private ee;
    private _backgroundColor;
    private _headerColor;
    private _isClosingConfirmationEnabled;
    /**
     * Updates current closing confirmation enable status.
     *
     * @param value - new closing confirmation status.
     * @private
     */
    private set isClosingConfirmationEnabled(value);
    constructor(bridge: Bridge, headerColor: SettableColorKey, backgroundColor: RGBColor, version: Version, isClosingConfirmationEnabled?: boolean);
    /**
     * Current native application background color.
     */
    get backgroundColor(): RGBColor;
    /**
     * Closes the Web App.
     */
    close: () => void;
    /**
     * Returns current application color scheme. This value is computed according
     * to current background color.
     */
    get colorScheme(): ColorScheme;
    /**
     * Disables the confirmation dialog while the user is trying to close the
     * Web App.
     */
    disableClosingConfirmation: () => void;
    /**
     * Enables the confirmation dialog while the user is trying to close the
     * Web App.
     */
    enableClosingConfirmation: () => void;
    /**
     * Current native application header color key.
     */
    get headerColor(): SettableColorKey;
    /**
     * `true`, if the confirmation dialog enabled while the user is trying to
     * close the Web App.
     */
    get isClosingConfirmationEnabled(): boolean;
    /**
     * Return `true` in case, passed version is more than or equal to current
     * Web App version.
     *
     * @param version - compared version.
     */
    isVersionAtLeast: (version: Version) => boolean;
    /**
     * Opens a link in an external browser. The Web App will not be closed.
     *
     * Note that this method can be called only in response to the user
     * interaction with the Web App interface (e.g. click inside the Web App
     * or on the main button).
     *
     * @param url - URL to be opened.
     */
    openLink: (url: string) => void;
    /**
     * Opens a telegram link inside Telegram app. The Web App will be closed.
     *
     * @param url - URL to be opened.
     * @throws {Error} URL has not allowed hostname.
     * @since Web App version 6.1+
     */
    openTelegramLink: (url: string) => void;
    /**
     * TODO: Check docs.
     * FIXME: Implement
     * Opens an invoice using the link url.
     *
     * @since Bot API 6.1+
     * @param url
     */
    openInvoice: (url: string) => void;
    /**
     * Adds new event listener.
     */
    on: <E extends keyof WebAppEventsMap>(event: E, listener: import("twa-core").EventListener<WebAppEventsMap[E]>) => void;
    /**
     * Removes event listener.
     */
    off: <E extends keyof WebAppEventsMap>(event: E, listener: import("twa-core").EventListener<WebAppEventsMap[E]>) => void;
    /**
     * Informs the Telegram app that the Web App is ready to be displayed.
     *
     * It is recommended to call this method as early as possible, as soon as
     * all essential interface elements loaded. Once this method called,
     * the loading placeholder is hidden and the Web App shown.
     *
     * If the method not called, the placeholder will be hidden only when
     * the page fully loaded.
     */
    ready: () => void;
    /**
     * Checks if current version satisfies minimum (passed) version.
     *
     * @param version - version number.
     * @throws {Error} Version of Web App does not support this method.
     */
    requireVersion: (version: Version) => void;
    /**
     * A method used to send data to the bot. When this method called, a
     * service message sent to the bot containing the data of the
     * length up to 4096 bytes, and the Web App closed. See the field
     * `web_app_data` in the class Message.
     *
     * This method is only available for Web Apps launched via a Keyboard button.
     *
     * @param data - data to send to bot.
     * @throws {Error} data has incorrect size.
     */
    sendData: (data: string) => void;
    /**
     * Updates current application background color.
     * FIXME: Has no effect on desktop, works incorrectly on Android.
     *  Issues:
     *  https://github.com/Telegram-Web-Apps/client-sdk/issues/1
     *  https://github.com/Telegram-Web-Apps/client-sdk/issues/2
     *
     * @param color - settable color key or color description in known RGB
     * format.
     * @since Web App version 6.1+
     */
    setBackgroundColor: (color: RGBColor) => void;
    /**
     * Updates current application header color.
     * FIXME: Has no effect on desktop, works incorrectly on Android.
     *  Issues:
     *  https://github.com/Telegram-Web-Apps/client-sdk/issues/1
     *  https://github.com/Telegram-Web-Apps/client-sdk/issues/2
     *
     * @param color - settable color key.
     * @since Web App version 6.1+
     */
    setHeaderColor: (color: SettableColorKey) => void;
    /**
     * Current Web App version. This property is used by other components to check if
     * some functionality is available on current device.
     */
    version: Version;
}