/**
 * HttpStorage.ts
 *
 * ARCHITECTURE DOCUMENTATION
 * ==========================
 *
 * HttpStorage is a client-side storage implementation that fetches content
 * via HTTP and receives real-time updates via WebSocket notifications.
 *
 * REAL-TIME SYNCHRONIZATION:
 * --------------------------
 * 1. HttpStorage connects to /ws/notifications WebSocket endpoint
 * 2. Subscribes to file/folder change events for specific slots
 * 3. When notifications arrive, converts them to standard IStorage events
 * 4. Consumers (MCWorld, etc.) subscribe to these events
 *
 * DATA FLOW:
 * ----------
 * NodeStorage (fs.watch) -> HttpServer (broadcast) -> WebSocket ->
 *   HttpStorage (this) -> notifyFileAdded/Removed/Updated -> MCWorld -> WorldView
 *
 * WEBSOCKET PROTOCOL:
 * -------------------
 * - Connect: ws://host:port/ws/notifications?token=<authToken>
 * - Subscribe: { header: {..., messageType: "subscriptionRequest", messagePurpose: "subscribe" },
 *               body: { eventNames: ["fileChanged", "fileAdded", ...], slot: 0 } }
 * - Receive: IServerNotification messages with file/folder change details
 *
 * RELATED FILES:
 * --------------
 * - IServerNotification.ts: WebSocket message format definitions
 * - IStorageWatcher.ts: INotificationReceiver interface
 * - HttpServer.ts: Server-side WebSocket broadcaster
 * - NodeStorage.ts: Server-side file watcher source
 *
 * USAGE:
 * ------
 * const storage = HttpStorage.get("http://localhost:6126/api/worldContent/0/");
 * storage.authToken = "encrypted-token";
 * await storage.connectToNotifications();
 * storage.onFileAdded.subscribe((sender, file) => console.log("File added:", file.name));
 */
import HttpFolder from "./HttpFolder";
import StorageBase from "./StorageBase";
import IStorage from "./IStorage";
import { INotificationReceiver } from "./IStorageWatcher";
export default class HttpStorage extends StorageBase implements IStorage, INotificationReceiver {
    rootFolder: HttpFolder;
    baseUrl: string;
    /**
     * Bearer token for Authorization header.
     * When set, requests will include "Authorization: Bearer <token>" header.
     * This is used for authenticated endpoints like /api/content.
     */
    authToken?: string;
    /**
     * When true (default), the storage is read-only and write operations will throw.
     * Set to false to enable HTTP PUT/DELETE operations for editing content.
     */
    readOnly: boolean;
    /** WebSocket connection for receiving notifications */
    private _webSocket;
    /** Currently subscribed event names */
    private _subscribedEvents;
    /** Server slot this storage is associated with (for filtering notifications) */
    private _slot?;
    /** Whether we're currently connected to the notification server */
    private _isConnected;
    /** Reconnection timer */
    private _reconnectTimer?;
    /** Whether auto-reconnect is enabled */
    private _autoReconnect;
    /**
     * Event fired when the server sends a shutdown notification.
     * This indicates the entire MCT server is shutting down (not just a BDS instance).
     * Subscribers should show appropriate UI feedback and disable auto-reconnect.
     * Args: (reason: string, graceful: boolean)
     */
    private _onServerShutdown;
    /**
     * Subscribe to server shutdown notifications.
     * This is fired when the MCT server is about to shut down.
     */
    get onServerShutdown(): import("ste-events").IEvent<HttpStorage, {
        reason: string;
        graceful: boolean;
    }>;
    /**
     * Static cache of HttpStorage instances by base URL.
     * Used to avoid creating duplicate storage instances for the same URL.
     */
    private static _storageCache;
    /**
     * Get or create an HttpStorage instance for the given base URL.
     * Reuses cached instances to avoid creating duplicates.
     * @param baseUrl The base URL for the storage
     * @returns A cached or new HttpStorage instance
     */
    static get(baseUrl: string): HttpStorage;
    /**
     * Clear the storage cache. Useful for testing or when storage should be refreshed.
     */
    static clearCache(): void;
    constructor(newUrl: string);
    getAvailable(): Promise<boolean>;
    get isConnected(): boolean;
    /**
     * Get the underlying WebSocket connection.
     * Can be used to listen for raw notifications (e.g., debug stats).
     */
    get webSocket(): WebSocket | null;
    /**
     * Set the slot number for filtering notifications.
     */
    set slot(value: number | undefined);
    get slot(): number | undefined;
    /**
     * Connect to the WebSocket notification endpoint.
     * The WebSocket URL is derived from the baseUrl.
     *
     * @param url Optional override URL for the WebSocket endpoint
     * @param authToken Optional auth token (uses this.authToken if not provided)
     */
    connect(url?: string, authToken?: string): Promise<void>;
    /**
     * Disconnect from the WebSocket notification server.
     */
    disconnect(): void;
    /**
     * Subscribe to specific event types.
     *
     * @param eventNames Array of event names to subscribe to
     * @param slot Optional slot number to filter events
     */
    subscribe(eventNames: string[], slot?: number): Promise<void>;
    /**
     * Unsubscribe from specific event types.
     */
    unsubscribe(eventNames: string[]): Promise<void>;
    /**
     * Send a subscription request to the server.
     */
    private _sendSubscription;
    /**
     * Handle an incoming notification message.
     */
    private _handleNotification;
}