import { MutableRefObject } from 'react';
import { ReadyState } from './constants';
export interface QueryParams {
    [key: string]: string | number;
}
export interface Options {
    fromSocketIO?: boolean;
    queryParams?: QueryParams;
    protocols?: string | string[];
    share?: boolean;
    onOpen?: (event: WebSocketEventMap['open']) => void;
    onClose?: (event: WebSocketEventMap['close']) => void;
    onMessage?: (event: WebSocketEventMap['message']) => void;
    onError?: (event: WebSocketEventMap['error']) => void;
    onReconnectStop?: (numAttempts: number) => void;
    shouldReconnect?: (event: WebSocketEventMap['close']) => boolean;
    reconnectInterval?: number;
    reconnectAttempts?: number;
    filter?: (message: WebSocketEventMap['message']) => boolean;
    retryOnError?: boolean;
    eventSourceOptions?: EventSourceOnly;
}
export declare type EventSourceOnly = Omit<Options, 'eventSourceOptions'> & EventSourceInit;
export interface EventSourceEventHandlers {
    [eventName: string]: (message: EventSourceEventMap['message']) => void;
}
export interface EventSourceOptions extends EventSourceOnly {
    events?: EventSourceEventHandlers;
}
export declare type ReadyStateState = {
    [url: string]: ReadyState;
};
export declare type WebSocketMessage = string | ArrayBuffer | SharedArrayBuffer | Blob | ArrayBufferView;
export declare type SendMessage = (message: WebSocketMessage) => void;
export declare type SendJsonMessage = (jsonMessage: any) => void;
export declare type Subscriber<T = WebSocketEventMap['message']> = {
    setLastMessage: (message: T) => void;
    setReadyState: (readyState: ReadyState) => void;
    optionsRef: MutableRefObject<Options>;
    reconnectCount: MutableRefObject<number>;
    reconnect: MutableRefObject<() => void>;
};
export declare type WebSocketHook<T = WebSocketEventMap['message']> = {
    sendMessage: SendMessage;
    sendJsonMessage: SendJsonMessage;
    lastMessage: T | null;
    lastJsonMessage: any;
    readyState: ReadyState;
    getWebSocket: () => (WebSocketLike | null);
};
export declare type EventSourceHook = Omit<WebSocketHook<EventSourceEventMap['message']>, 'sendMessage' | 'sendJsonMessage' | 'lastMessage' | 'lastJsonMessage' | 'getWebSocket'> & {
    lastEvent: EventSourceEventMap['message'] | null;
    getEventSource: () => (WebSocketLike | null);
};
export declare type WebSocketLike = WebSocket | EventSource;