import { GatewayRuntime, UnifiedGraphConfig, GatewayConfigSupergraph, GatewayConfigBase } from '@graphql-hive/gateway-runtime';
import { MaybeAsyncIterable, ExecutionResult } from '@graphql-tools/utils';
import { GraphQLSchema, GraphQLFieldResolver, GraphQLScalarType } from 'graphql';
import { YogaServerOptions, YogaServerInstance } from 'graphql-yoga';

/** Thanks @apollo/subgraph for not re-exporting this! */
interface GraphQLResolverMap<TContext = {}> {
    [typeName: string]: {
        [fieldName: string]: GraphQLFieldResolver<any, TContext> | {
            requires?: string;
            resolve?: GraphQLFieldResolver<any, TContext>;
            subscribe?: GraphQLFieldResolver<any, TContext>;
        };
    } | GraphQLScalarType | {
        [enumValue: string]: string | number;
    };
}
type GatewayTesterRemoteSchemaConfigYoga = Exclude<YogaServerOptions<any, any>, 'schema'> | ((schema: GraphQLSchema) => YogaServerInstance<any, any>);
interface GatewayTesterRemoteSchemaConfig {
    /** The name of the remote schema / subgraph / proxied server. */
    name: string;
    /** The remote schema. */
    schema: GraphQLSchema | {
        typeDefs: string;
        resolvers?: GraphQLResolverMap;
    };
    /** The hostname of the remote schema. URL will become `http://${host}${yoga.graphqlEndpoint}`. */
    host?: string;
    /** An optional GraphQL Yoga server instance that runs the {@link schema built schema}. */
    yoga?: GatewayTesterRemoteSchemaConfigYoga;
}
type GatewayTesterConfig<TContext extends Record<string, any> = Record<string, any>> = ({
    supergraph: UnifiedGraphConfig;
} & Omit<GatewayConfigSupergraph<TContext>, 'supergraph'>) | ({
    subgraphs: GatewayTesterRemoteSchemaConfig[] | (() => GatewayTesterRemoteSchemaConfig[]);
} & Omit<GatewayConfigSupergraph<TContext>, 'supergraph'>) | ({
    proxy: GatewayTesterRemoteSchemaConfig & {
        /** Additional headers to be sent to the remote schema on every request. */
        headers?: Record<string, string>;
    };
} & GatewayConfigBase<TContext>);
interface GatewayTester<TContext extends Record<string, any> = Record<string, any>> extends AsyncDisposable {
    runtime: GatewayRuntime<TContext>;
    fetch: typeof fetch;
    execute(args: {
        query: string;
        variables?: Record<string, unknown>;
        operationName?: string;
        extensions?: Record<string, unknown>;
        headers?: Record<string, string>;
    }): Promise<MaybeAsyncIterable<ExecutionResult<any>>>;
    dispose(): Promise<void>;
}
declare function createGatewayTester<TContext extends Record<string, any> = Record<string, any>>(config: GatewayTesterConfig<TContext>): GatewayTester<TContext>;

export { type GatewayTester, type GatewayTesterConfig, type GatewayTesterRemoteSchemaConfig, type GatewayTesterRemoteSchemaConfigYoga, type GraphQLResolverMap, createGatewayTester };