/// <reference types="node" />
import http, { IncomingMessage, ServerResponse } from 'http';
import https from 'https';
import { IGripConfig, Publisher, WebSocketContext } from "@fanoutio/grip";
import { ServeGrip } from '@fanoutio/serve-grip';
import { ExecutionResult, GraphQLSchema, DocumentNode, GraphQLFieldResolver, ValidationRule } from 'graphql';
import { IPersistence } from "../persistence/persistence";
export declare type ExecutionIterator = AsyncIterator<ExecutionResult>;
export declare type IFormatResultFunction = (value: ExecutionResult, params: ExecutionParams) => ExecutionResult;
export declare type IFormatErrorFunction = (e: Error, params: ExecutionParams) => Error;
export interface ExecutionParams<TContext = any> {
    query: string | DocumentNode;
    variables: {
        [key: string]: any;
    };
    operationName: string;
    context: TContext;
    formatResponse?: IFormatResultFunction;
    formatError?: IFormatErrorFunction;
    schema?: GraphQLSchema;
}
export declare type ConnectionContext = {
    initPromise?: Promise<any>;
    wsId: string;
    wsContext?: WebSocketContext;
    request?: IncomingMessage;
    operations: {
        [opId: string]: ExecutionIterator;
    };
};
export interface OperationMessagePayload {
    [key: string]: any;
    query?: string;
    variables?: {
        [key: string]: any;
    };
    operationName?: string;
}
export interface OperationMessage {
    payload?: OperationMessagePayload;
    id?: string;
    type: string;
}
export declare type ExecuteFunction = (schema: GraphQLSchema, document: DocumentNode, rootValue?: any, contextValue?: any, variableValues?: {
    [key: string]: any;
}, operationName?: string, fieldResolver?: GraphQLFieldResolver<any, any>) => ExecutionResult | Promise<ExecutionResult> | AsyncIterator<ExecutionResult>;
export declare type SubscribeFunction = (schema: GraphQLSchema, document: DocumentNode, rootValue?: any, contextValue?: any, variableValues?: {
    [key: string]: any;
}, operationName?: string, fieldResolver?: GraphQLFieldResolver<any, any>, subscribeFieldResolver?: GraphQLFieldResolver<any, any>) => AsyncIterator<ExecutionResult> | Promise<AsyncIterator<ExecutionResult> | ExecutionResult>;
export declare type IOnOperationHandler = (message: OperationMessage, baseParams: ExecutionParams, wsContextId: string | undefined) => Promise<ExecutionParams>;
export declare type IOnOperationCompleteHandler = (wsContextId: string | undefined, opId: string) => void;
export declare type IOnConnectHandler = (payload: OperationMessagePayload | undefined, wsContextId: string | undefined, connectionContext: ConnectionContext) => Promise<object | boolean>;
export declare type IOnDisconnectHandler = (wsContextId: string | undefined, connectionContext: ConnectionContext) => void;
export interface ServerOptions {
    rootValue?: any;
    schema?: GraphQLSchema;
    execute?: ExecuteFunction;
    subscribe?: SubscribeFunction;
    validationRules?: ValidationRule[];
    onOperation?: IOnOperationHandler;
    onOperationComplete?: IOnOperationCompleteHandler;
    onConnect?: IOnConnectHandler;
    onDisconnect?: IOnDisconnectHandler;
    keepAlive?: number;
    persistence?: IPersistence;
    grip: string | IGripConfig | IGripConfig[] | Publisher;
    gripPrefix?: string;
}
export declare class SubscriptionServer {
    private readonly server?;
    private execute?;
    private subscribe?;
    private schema?;
    private rootValue?;
    private readonly keepAlive?;
    private readonly specifiedRules;
    readonly serveGrip: ServeGrip;
    private readonly onOperation?;
    private readonly onOperationComplete?;
    private readonly onConnect?;
    private readonly onDisconnect?;
    private readonly readyPromise;
    private readonly persistence;
    static create(options: ServerOptions, server?: http.Server | https.Server): SubscriptionServer;
    constructor(options: ServerOptions, server?: http.Server | https.Server);
    requestHandler(req: IncomingMessage, res: ServerResponse): Promise<boolean>;
    private prep;
    ready(): Promise<void>;
    private _connectionContexts;
    private getConnectionContext;
    private loadExecutor;
    private unsubscribe;
    private onClose;
    private onMessage;
    private sendKeepAlive;
    private sendMessage;
    private sendError;
}