import { IResolvers, Transform } from '@graphql-tools/utils';
import { GraphQLSchema, GraphQLResolveInfo, DocumentNode } from 'graphql';
import * as YamlConfig from './config';
import { KeyValueCache, KeyValueCacheSetOptions } from 'fetchache';
import { Executor, Subscriber } from '@graphql-tools/delegate';
export { YamlConfig };
export declare function getJsonSchema(): any;
export declare type MeshSource<ContextType = any, InitialContext = any> = {
    schema: GraphQLSchema;
    executor?: Executor;
    subscriber?: Subscriber;
    contextVariables?: (keyof InitialContext)[];
    contextBuilder?: (initialContextValue: InitialContext) => Promise<ContextType>;
    batch?: boolean;
};
export declare type GetMeshSourceOptions<THandlerConfig> = {
    name: string;
    pubsub: MeshPubSub;
    config: THandlerConfig;
    cache: KeyValueCache;
};
export interface MeshHandler<TContext = any> {
    getMeshSource: () => Promise<MeshSource<TContext>>;
}
export interface MeshHandlerLibrary<TConfig = any, TContext = any> {
    new (options: GetMeshSourceOptions<TConfig>): MeshHandler<TContext>;
}
export declare type ResolverData<TParent = any, TArgs = any, TContext = any> = {
    root?: TParent;
    args?: TArgs;
    context?: TContext;
    info?: GraphQLResolveInfo;
};
export declare type AllHooks = {
    destroy: void;
    resolverCalled: {
        resolverData: ResolverData;
    };
    resolverDone: {
        resolverData: ResolverData;
        result: any;
    };
    resolverError: {
        resolverData: ResolverData;
        error: Error;
    };
    [key: string]: any;
};
export declare type HookName = keyof AllHooks & string;
export interface MeshPubSub {
    publish<THook extends HookName>(triggerName: THook, payload: AllHooks[THook]): Promise<void>;
    subscribe<THook extends HookName>(triggerName: THook, onMessage: (data: AllHooks[THook]) => void, options?: any): Promise<number>;
    unsubscribe(subId: number): void;
    asyncIterator<THook extends HookName>(triggers: THook): AsyncIterator<AllHooks[THook]>;
}
export interface MeshTransformOptions<Config = any> {
    config: Config;
    cache: KeyValueCache;
    pubsub: MeshPubSub;
    apiName?: string;
}
export interface MeshTransformLibrary<Config = any> {
    new (options: MeshTransformOptions<Config>): MeshTransform;
}
export interface MeshTransform extends Transform {
    noWrap?: boolean;
}
export declare type Maybe<T> = null | undefined | T;
export { KeyValueCache, KeyValueCacheSetOptions };
export declare type MergerFn = (options: {
    rawSources: RawSourceOutput[];
    cache: KeyValueCache;
    pubsub: MeshPubSub;
    typeDefs?: DocumentNode[];
    resolvers?: IResolvers;
    transforms?: Transform[];
    executor?: Executor;
}) => Promise<GraphQLSchema> | GraphQLSchema;
export declare type RawSourceOutput = {
    name: string;
    contextBuilder: null | ((initialContextValue?: any) => Promise<any>);
    schema: GraphQLSchema;
    executor?: Executor;
    subscriber?: Subscriber;
    transforms: MeshTransform[];
    contextVariables: (keyof any)[];
    handler: MeshHandler;
    batch: boolean;
};
export declare type GraphQLOperation = DocumentNode | string;
export declare type ImportFn = (moduleId: string) => Promise<any>;