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 | ((lastAttemptNumber: number) => number);
    reconnectAttempts?: number;
    filter?: (message: WebSocketEventMap['message']) => boolean;
    retryOnError?: boolean;
    eventSourceOptions?: EventSourceOnly;
    skipAssert?: boolean;
}
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, keep?: boolean) => void;
export declare type SendJsonMessage = (jsonMessage: JsonValue, keep?: boolean) => 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 = JsonValue, P = WebSocketEventMap['message'] | null> = {
    sendMessage: SendMessage;
    sendJsonMessage: SendJsonMessage;
    lastMessage: P;
    lastJsonMessage: T;
    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;
/**
Matches a [`class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes).
@category Class
*/
export declare type Class<T, Arguments extends unknown[] = any[]> = Constructor<T, Arguments> & {
    prototype: T;
};
/**
Matches a [`class` constructor](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes).
@category Class
*/
export declare type Constructor<T, Arguments extends unknown[] = any[]> = new (...arguments_: Arguments) => T;
/**
Matches any valid JSON primitive value.
@category JSON
*/
export declare type JsonPrimitive = string | number | boolean | null;
/**
Matches a JSON object.
This type can be useful to enforce some input to be JSON-compatible or as a super-type to be extended from. Don't use this as a direct return type as the user would have to double-cast it: `jsonObject as unknown as CustomResponse`. Instead, you could extend your CustomResponse type from it to ensure your type only uses JSON-compatible types: `interface CustomResponse extends JsonObject { … }`.
@category JSON
*/
export declare type JsonObject = {
    [Key in string]?: JsonValue | JsonPrimitive;
};
/**
Matches a JSON array.
@category JSON
*/
export declare type JsonArray = JsonValue[] | JsonPrimitive[];
/**
Matches any valid JSON value.
@see `Jsonify` if you need to transform a type to one that is assignable to `JsonValue`.
@category JSON
*/
export declare type JsonValue = JsonObject | JsonArray;