import type { DocumentNode, GraphQLSchema } from 'graphql';
import type { TransportEntryAdditions } from '@graphql-hive/gateway';
import type { TransportContext, TransportEntry } from '@graphql-mesh/transport-common';
import type { OnDelegateHook } from '@graphql-mesh/types';
import type { SubschemaConfig } from '@graphql-tools/delegate';
import type { IResolvers, MaybePromise, TypeSource } from '@graphql-tools/utils';
import { DisposableSymbols } from '@whatwg-node/disposablestack';
import { getOnSubgraphExecute, type OnSubgraphExecuteHook, type Transports } from './utils.js';
export declare function ensureSchema(source: GraphQLSchema | DocumentNode | string): GraphQLSchema;
export type UnifiedGraphHandler = (opts: UnifiedGraphHandlerOpts) => UnifiedGraphHandlerResult;
export interface UnifiedGraphHandlerOpts {
    unifiedGraph: GraphQLSchema;
    additionalTypeDefs?: TypeSource;
    additionalResolvers?: IResolvers<unknown, any> | IResolvers<unknown, any>[];
    onSubgraphExecute: ReturnType<typeof getOnSubgraphExecute>;
    transportEntryAdditions?: TransportEntryAdditions;
    /**
     * Whether to batch the subgraph executions.
     * @default true
     */
    batch?: boolean;
}
export interface UnifiedGraphHandlerResult {
    unifiedGraph: GraphQLSchema;
    transportEntryMap: Record<string, TransportEntry>;
    subschemas: SubschemaConfig[];
    additionalResolvers: IResolvers[];
}
export interface UnifiedGraphManagerOptions<TContext> {
    getUnifiedGraph(ctx: TransportContext): MaybePromise<GraphQLSchema | string | DocumentNode>;
    handleUnifiedGraph?: UnifiedGraphHandler;
    onSchemaChange?(unifiedGraph: GraphQLSchema): void;
    transports?: Transports;
    transportEntryAdditions?: TransportEntryAdditions;
    /** Schema polling interval in milliseconds. */
    pollingInterval?: number;
    additionalTypeDefs?: TypeSource;
    additionalResolvers?: IResolvers<unknown, TContext> | IResolvers<unknown, TContext>[];
    transportContext?: TransportContext;
    onSubgraphExecuteHooks?: OnSubgraphExecuteHook[];
    onDelegateHooks?: OnDelegateHook<unknown>[];
    /**
     * Whether to batch the subgraph executions.
     * @default true
     */
    batch?: boolean;
}
export declare class UnifiedGraphManager<TContext> {
    private opts;
    private batch;
    private handleUnifiedGraph;
    private unifiedGraph;
    private lastLoadedUnifiedGraph;
    private onSubgraphExecuteHooks;
    private currentTimeout;
    private inContextSDK;
    private initialUnifiedGraph$;
    private disposableStack;
    private _transportEntryMap;
    private _transportExecutorStack;
    constructor(opts: UnifiedGraphManagerOptions<TContext>);
    private pausePolling;
    private continuePolling;
    private ensureUnifiedGraph;
    private getAndSetUnifiedGraph;
    getUnifiedGraph(): MaybePromise<GraphQLSchema>;
    getContext<T extends {} = {}>(base?: T): MaybePromise<T>;
    getTransportEntryMap(): MaybePromise<Record<string, TransportEntry<Record<string, any>>>>;
    invalidateUnifiedGraph(): MaybePromise<true>;
    [DisposableSymbols.asyncDispose](): Promise<void>;
}