import { Socket } from 'socket.io-client';
import { InitConfig, OnlineQueueStatus } from './types';
interface ConnectionState {
    socket: Socket | null;
    popupEl: HTMLElement | null;
    isNavigating: boolean;
    storageTokenKey: string | null;
    storageConnectKey: string | null;
    queueStatus: {
        position: number;
        status: OnlineQueueStatus;
        uuid: string;
    } | null;
    wsUrl: string | null;
    apiUrl: string | null;
    socketConfig: InitConfig['socketConfig'] | null;
}
declare class ConnectionJQueueSdkWeb {
    private static readonly CONFIG;
    private static state;
    private static ttlInterval;
    private static statusListeners;
    private static log;
    private static injectStyles;
    private static createPopup;
    private static removePopup;
    private static toggleNavigation;
    private static sendLeaveRequest;
    private static getDefaultPopupContent;
    private static getLoadingPopupContent;
    private static getAdjustedPollInterval;
    private static clearInterval;
    private static reloadPage;
    private static startStatusEmission;
    private static startCheckDisconnectedEmission;
    private static updateQueueStatus;
    private static handleStatusUpdate;
    private static setupSocket;
    /**
     * Adds a listener for queue status updates.
     * @param listener Callback function to receive status updates.
     */
    static addStatusListener(listener: (status: NonNullable<ConnectionState['queueStatus']>) => void): void;
    /**
     * Removes a queue status listener.
     * @param listener Callback function to remove.
     */
    static removeStatusListener(listener: (status: NonNullable<ConnectionState['queueStatus']>) => void): void;
    /**
     * Gets the current queue status.
     * @returns Current queue status or null if not initialized.
     */
    static getQueueStatus(): ConnectionState['queueStatus'];
    /**
     * Initializes the J-Queue SDK with the provided configuration.
     * @param config Configuration for the SDK.
     * @returns Promise resolving to an object with a disconnect method.
     */
    static init({ wsUrl, apiUrl, socketConfig, popupConfig, customEvents, option, }: InitConfig): Promise<{
        disconnect: () => void;
    }>;
    private static cleanup;
    private static disconnect;
    /**
     * Initializes the SDK using attributes from the script tag.
     * Automatically called when the script is loaded with data-* attributes.
     * Supported attributes:
     * - data-ws-url: WebSocket URL (optional; if not provided, determined by data-mode).
     * - data-mode: Environment mode ('dev' or 'prod'; optional, defaults to 'prod').
     * - data-api-url: API URL for queue operations.
     * - data-storage-token-key: sessionStorage key for queue token.
     * - data-storage-connect-key: sessionStorage key for connect key.
     * - data-connect-key: Connect key for socket query.
     * - data-show-loading: Show loading popup on connect ('true'/'false').
     * - data-language: Language for popup ('en'/'ko').
     * - data-storage-language-key: Language for popup ('en'/'ko').
     * - data-text-color: Text color for popup.
     * - data-loader-gradient-start: Starting color for the loader gradient.
     * - data-loader-gradient-end: Ending color for the loader gradient.
     */
    static initFromScriptAttributes(): void;
}
declare global {
    interface Window {
        ConnectionJQueueSdkWeb?: typeof ConnectionJQueueSdkWeb;
    }
}
export default ConnectionJQueueSdkWeb;
export type { InitConfig, OnlineQueueStatus, PopupConfig } from './types';