import express from "express";
import type { GraphQLResolveInfo } from "graphql";
import { HttpsFunction, HttpsOptions } from "../https";
/** @hidden */
export declare function initGraphqlServer(opts: GraphqlServerOptions): Promise<express.Express>;
/**
 * Handles HTTPS GraphQL requests.
 * @param {GraphqlServerOptions} opts - Options for configuring the GraphQL server.
 * @returns {HttpsFunction} A function you can export and deploy.
 */
export declare function onGraphRequest(opts: GraphqlServerOptions): HttpsFunction;
/**
 * Options for configuring the GraphQL server.
 */
export interface GraphqlServerOptions extends Omit<HttpsOptions, "cors"> {
    /**
     * A valid SDL string that represents the GraphQL server's schema.
     * Either `schema` or `schemaFilePath` is required.
     */
    schema?: string;
    /**
     * A relative file path from the Firebase project directory to a valid GraphQL schema.
     * Either `schema` or `schemaFilePath` is required.
     */
    schemaFilePath?: string;
    /**
     * The path where the GraphQL server will be served on the Cloud Run function.
     * e.g. https://...run.app/{path}
     * If no path is provided, "graphql" is used as the default.
     */
    path?: string;
    /** A map of functions that populate data for individual GraphQL schema fields. */
    resolvers: GraphqlResolvers;
}
/**
 * Per-request context state shared by all resolvers in a particular query.
 */
export interface FirebaseContext {
    auth: {
        /** The token attached to the `X-Firebase-Auth-Token` in the request, if present. */
        token?: string;
    };
}
/**
 * Resolver functions that populate data for individual GraphQL schema fields.
 */
export interface GraphqlResolvers {
    query?: {
        [resolver: string]: (parent: unknown, args: Record<string, unknown>, context: FirebaseContext, info: GraphQLResolveInfo) => unknown;
    };
    mutation?: {
        [key: string]: (parent: unknown, args: Record<string, unknown>, context: FirebaseContext, info: GraphQLResolveInfo) => unknown;
    };
}