import { APIGatewayEvent, Context as LambdaContext } from 'aws-lambda';
import { GraphQLResolveInfo } from 'graphql';
import { PubSubEngine } from 'graphql-subscriptions';
import { APIGatewayWebSocketEvent } from './aws';
import { IConnection, IConnectionManager } from './connections';
import { ISubscriptionManager } from './subscriptions';
import { OperationRequest } from './operations';
/**
 * Superset of context passed to every operation invoked by websocket
 */
export interface IContext {
    event: (APIGatewayEvent | APIGatewayWebSocketEvent) & {
        appSyncExtensions?: AppSyncExtensions;
    };
    /**
     * Lambda's context can be an empty object in case if custom event processors
     */
    lambdaContext: LambdaContext;
    $$internal: {
        /**
         * Current connection that invoked execution
         *
         * This is set up only during websocket event processing:
         *  - event processing
         *  - $connect
         *  - $disconnect
         *  - $default
         *
         * Ignored for HTTP event handling
         */
        connection?: IConnection;
        connectionManager: IConnectionManager;
        /**
         * Current executed operation
         *
         * This is set up only during websocket $default and event processing
         */
        operation?: OperationRequest;
        /**
         * Pub sub is set up only during event processing and websocket event processing
         *
         * Ignored for HTTP event handling
         */
        pubSub?: PubSubEngine;
        /**
         * Should we register subscriptions?
         * Basically this means that PubSub will call subscriptionManager
         * Otherwise it will create an async iterator right away
         *
         * For internal use only
         */
        registerSubscriptions?: boolean;
        subscriptionManager: ISubscriptionManager;
    };
    [key: string]: any;
}
export interface AppSyncExtensions {
    authorization?: {
        Authorization?: string;
        'x-api-key'?: string;
        'X-Api-Key'?: string;
        host?: string;
        'x-amz-user-agent'?: string;
        'x-amz-date'?: string;
    };
}
export declare type SubcribeResolveFn = (rootValue: any, args: any, context: IContext, info?: GraphQLResolveInfo) => Promise<AsyncIterator<any> & AsyncIterable<any>>;
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