/// <reference types="node" />
import { EventEmitter } from 'events';
import { GraphQLResolveInfo } from 'graphql';
import { IDebugger } from '@cortexql/core';
import { Request } from 'express';
import * as WebSocket from 'ws';
import { OperationMessage, ExecutionParams } from 'subscriptions-transport-ws';
import { GraphQLSchema, DocumentNode, ExecutionResult } from 'graphql';
export interface ContextExecute {
    (document: DocumentNode, variableValues?: {
        [key: string]: any;
    }, operationName?: string): Promise<ExecutionResult>;
}
export interface ContextSubscribe {
    (document: DocumentNode, variableValues?: {
        [key: string]: any;
    }, operationName?: string): Promise<ExecutionResult | AsyncIterator<ExecutionResult>>;
}
export interface ContextParams {
    [key: string]: any;
}
export declare function createContextId(context: BaseContext): any;
export declare function createExecutionContextId(context: BaseContext, info?: GraphQLResolveInfo): any;
export declare function createContextNamespace(context: BaseContext, info?: GraphQLResolveInfo, id?: any): string;
export declare class BaseContext {
    params: ContextParams;
    operationName: string | undefined;
    operationType: string | undefined;
    id: any;
    schema: GraphQLSchema;
    event: EventEmitter;
    executionEvent?: EventEmitter;
    execute: ContextExecute;
    subscribe: ContextSubscribe;
    context?: this;
    completed: boolean;
    completionError?: Error;
    completionReason?: string;
    isExecution: false;
    destroy(handler: (...args: any[]) => void): EventEmitter;
    on(event: string, handler: (...args: any[]) => void): EventEmitter;
    once(event: string, handler: (...args: any[]) => void): EventEmitter;
    removeListener(event: string, handler: (...args: any[]) => void): EventEmitter;
    removeAllListeners(event: string): EventEmitter;
    emit(event: string, ...args: any[]): boolean;
    constructor(params: ContextParams, operationName?: string | undefined, operationType?: string | undefined, id?: any);
    debug: IDebugger;
    execution(info?: GraphQLResolveInfo): Promise<ExecutionContext<this>>;
    endAll(): void;
    endAll(error: Error | null | undefined, reason?: string): void;
    endAll(handler: (error?: Error | null | undefined, reason?: string) => void): Promise<void>;
    end(): void;
    end(error: Error | null | undefined, reason?: string): void;
    end(handler: (error?: Error | null | undefined, reason?: string) => void): Promise<void>;
}
export declare class BaseExecutionContext<T extends BaseContext> {
    context: T;
    info: GraphQLResolveInfo | undefined;
    executionEvent: EventEmitter;
    isExecution: boolean;
    id: any;
    debug: IDebugger;
    completed: boolean;
    completionError?: Error;
    completionReason?: string;
    execution(info?: GraphQLResolveInfo | undefined): Promise<ExecutionContext<T>>;
    constructor(context: T, info?: GraphQLResolveInfo | undefined);
    destroy(handler: (...args: any[]) => void): EventEmitter;
    on(event: string, handler: (...args: any[]) => void): EventEmitter;
    once(event: string, handler: (...args: any[]) => void): EventEmitter;
    removeListener(event: string, handler: (...args: any[]) => void): EventEmitter;
    removeAllListeners(event: string): EventEmitter;
    emit(event: string, ...args: any[]): boolean;
    end(): void;
    end(error: Error | null | undefined, reason?: string): void;
    end(handler: (error?: Error | null | undefined, reason?: string) => void): Promise<void>;
}
export declare type ExecutionContext<T extends BaseContext> = T & BaseExecutionContext<T>;
export declare function createContext(params: ContextParams, operationName?: string, operationType?: string, executionId?: any): Promise<BaseContext>;
export declare function createExecutionContext<T extends BaseContext>(context: T, info?: GraphQLResolveInfo): Promise<ExecutionContext<T>>;
export declare function getOperationFromQuery(query: string): {
    operationName: string;
    operationType: string;
} | {
    operationName: undefined;
    operationType: undefined;
};
export declare function createContextFromExpressRequest(req: Request, params?: ContextParams): Promise<BaseContext>;
export declare function createContextFromWebSocketTransport(webSocket: WebSocket, message: OperationMessage, params: ExecutionParams): Promise<BaseContext>;