import type { webpack5 } from 'next/dist/compiled/webpack/webpack';
import { Header, Redirect, Rewrite } from '../lib/load-custom-routes';
import { ImageConfig, ImageConfigComplete, RemotePattern } from '../shared/lib/image-config';
export declare type ServerRuntime = 'nodejs' | 'experimental-edge' | undefined;
export declare type NextConfigComplete = Required<NextConfig> & {
    images: Required<ImageConfigComplete>;
    typescript: Required<TypeScriptConfig>;
    configOrigin?: string;
    configFile?: string;
    configFileName: string;
};
export interface I18NConfig {
    defaultLocale: string;
    domains?: DomainLocale[];
    localeDetection?: false;
    locales: string[];
}
export interface DomainLocale {
    defaultLocale: string;
    domain: string;
    http?: true;
    locales?: string[];
}
export interface ESLintConfig {
    /** Only run ESLint on these directories with `next lint` and `next build`. */
    dirs?: string[];
    /** Do not run ESLint during production builds (`next build`). */
    ignoreDuringBuilds?: boolean;
}
export interface TypeScriptConfig {
    /** Do not run TypeScript during production builds (`next build`). */
    ignoreBuildErrors?: boolean;
    /** Relative path to a custom tsconfig file */
    tsconfigPath?: string;
}
export interface WebpackConfigContext {
    /** Next.js root directory */
    dir: string;
    /** Indicates if the compilation will be done in development */
    dev: boolean;
    /** It's `true` for server-side compilation, and `false` for client-side compilation */
    isServer: boolean;
    /**  The build id, used as a unique identifier between builds */
    buildId: string;
    /** The next.config.js merged with default values */
    config: NextConfigComplete;
    /** Default loaders used internally by Next.js */
    defaultLoaders: {
        /** Default babel-loader configuration */
        babel: any;
    };
    /** Number of total Next.js pages */
    totalPages: number;
    /** The webpack configuration */
    webpack: any;
    /** The current server runtime */
    nextRuntime?: 'nodejs' | 'edge';
}
export interface NextJsWebpackConfig {
    (
    /** Existing Webpack config */
    config: any, context: WebpackConfigContext): any;
}
export interface ExperimentalConfig {
    legacyBrowsers?: boolean;
    browsersListForSwc?: boolean;
    manualClientBasePath?: boolean;
    newNextLinkBehavior?: boolean;
    incrementalCacheHandlerPath?: string;
    disablePostcssPresetEnv?: boolean;
    swcMinify?: boolean;
    swcFileReading?: boolean;
    cpus?: number;
    sharedPool?: boolean;
    profiling?: boolean;
    isrFlushToDisk?: boolean;
    workerThreads?: boolean;
    pageEnv?: boolean;
    optimizeCss?: boolean;
    nextScriptWorkers?: boolean;
    scrollRestoration?: boolean;
    externalDir?: boolean;
    appDir?: boolean;
    amp?: {
        optimizer?: any;
        validator?: string;
        skipValidation?: boolean;
    };
    disableOptimizedLoading?: boolean;
    gzipSize?: boolean;
    craCompat?: boolean;
    esmExternals?: boolean | 'loose';
    isrMemoryCacheSize?: number;
    runtime?: Exclude<ServerRuntime, undefined>;
    serverComponents?: boolean;
    fullySpecified?: boolean;
    urlImports?: NonNullable<webpack5.Configuration['experiments']>['buildHttp'];
    outputFileTracingRoot?: string;
    images?: {
        remotePatterns?: RemotePattern[];
        unoptimized?: boolean;
        allowFutureImage?: boolean;
    };
    modularizeImports?: Record<string, {
        transform: string;
        preventFullImport?: boolean;
        skipDefaultConversion?: boolean;
    }>;
    swcTraceProfiling?: boolean;
    forceSwcTransforms?: boolean;
    /**
     * The option for the minifier of [SWC compiler](https://swc.rs).
     * This option is only for debugging the SWC minifier, and will be removed once the SWC minifier is stable.
     *
     * @see [SWC Minification](https://nextjs.org/docs/advanced-features/compiler#minification)
     */
    swcMinifyDebugOptions?: {
        compress?: object;
        mangle?: object;
    };
    swcPlugins?: Array<[string, Record<string, unknown>]>;
    largePageDataBytes?: number;
}
/**
 * Next configuration object
 * @see [configuration documentation](https://nextjs.org/docs/api-reference/next.config.js/introduction)
 */
export interface NextConfig extends Record<string, any> {
    /**
     * Internationalization configuration
     *
     * @see [Internationalization docs](https://nextjs.org/docs/advanced-features/i18n-routing)
     */
    i18n?: I18NConfig | null;
    /**
     * @since version 11
     * @see [ESLint configuration](https://nextjs.org/docs/basic-features/eslint)
     */
    eslint?: ESLintConfig;
    /**
     * @see [Next.js TypeScript documentation](https://nextjs.org/docs/basic-features/typescript)
     */
    typescript?: TypeScriptConfig;
    /**
     * Headers allow you to set custom HTTP headers for an incoming request path.
     *
     * @see [Headers configuration documentation](https://nextjs.org/docs/api-reference/next.config.js/headers)
     */
    headers?: () => Promise<Header[]>;
    /**
     * Rewrites allow you to map an incoming request path to a different destination path.
     *
     * @see [Rewrites configuration documentation](https://nextjs.org/docs/api-reference/next.config.js/rewrites)
     */
    rewrites?: () => Promise<Rewrite[] | {
        beforeFiles: Rewrite[];
        afterFiles: Rewrite[];
        fallback: Rewrite[];
    }>;
    /**
     * Redirects allow you to redirect an incoming request path to a different destination path.
     *
     * @see [Redirects configuration documentation](https://nextjs.org/docs/api-reference/next.config.js/redirects)
     */
    redirects?: () => Promise<Redirect[]>;
    /**
     * @deprecated This option has been removed as webpack 5 is now default
     * @see [Next.js webpack 5 documentation](https://nextjs.org/docs/messages/webpack5) for upgrading guidance.
     */
    webpack5?: false;
    /**
     * @see [Moment.js locales excluded by default](https://nextjs.org/docs/upgrading#momentjs-locales-excluded-by-default)
     */
    excludeDefaultMomentLocales?: boolean;
    /**
     * Before continuing to add custom webpack configuration to your application make sure Next.js doesn't already support your use-case
     *
     * @see [Custom Webpack Config documentation](https://nextjs.org/docs/api-reference/next.config.js/custom-webpack-config)
     */
    webpack?: NextJsWebpackConfig | null;
    /**
     * By default Next.js will redirect urls with trailing slashes to their counterpart without a trailing slash.
     *
     * @default false
     * @see [Trailing Slash Configuration](https://nextjs.org/docs/api-reference/next.config.js/trailing-slash)
     */
    trailingSlash?: boolean;
    /**
     * Next.js comes with built-in support for environment variables
     *
     * @see [Environment Variables documentation](https://nextjs.org/docs/api-reference/next.config.js/environment-variables)
     */
    env?: Record<string, string>;
    /**
     * Destination directory (defaults to `.next`)
     */
    distDir?: string;
    /**
     * The build output directory (defaults to `.next`) is now cleared by default except for the Next.js caches.
     */
    cleanDistDir?: boolean;
    /**
     * To set up a CDN, you can set up an asset prefix and configure your CDN's origin to resolve to the domain that Next.js is hosted on.
     *
     * @see [CDN Support with Asset Prefix](https://nextjs.org/docs/api-reference/next.config.js/cdn-support-with-asset-prefix)
     */
    assetPrefix?: string;
    /**
     * By default, `Next` will serve each file in the `pages` folder under a pathname matching the filename.
     * To disable this behavior and prevent routing based set this to `true`.
     *
     * @default true
     * @see [Disabling file-system routing](https://nextjs.org/docs/advanced-features/custom-server#disabling-file-system-routing)
     */
    useFileSystemPublicRoutes?: boolean;
    /**
     * @see [Configuring the build ID](https://nextjs.org/docs/api-reference/next.config.js/configuring-the-build-id)
     */
    generateBuildId?: () => string | null | Promise<string | null>;
    /** @see [Disabling ETag Configuration](https://nextjs.org/docs/api-reference/next.config.js/disabling-etag-generation) */
    generateEtags?: boolean;
    /** @see [Including non-page files in the pages directory](https://nextjs.org/docs/api-reference/next.config.js/custom-page-extensions) */
    pageExtensions?: string[];
    /** @see [Compression documentation](https://nextjs.org/docs/api-reference/next.config.js/compression) */
    compress?: boolean;
    /** @see [Disabling x-powered-by](https://nextjs.org/docs/api-reference/next.config.js/disabling-x-powered-by) */
    poweredByHeader?: boolean;
    /** @see [Using the Image Component](https://nextjs.org/docs/basic-features/image-optimization#using-the-image-component) */
    images?: ImageConfig;
    /** Configure indicators in development environment */
    devIndicators?: {
        /** Show "building..."" indicator in development */
        buildActivity?: boolean;
        /** Position of "building..." indicator in browser */
        buildActivityPosition?: 'bottom-right' | 'bottom-left' | 'top-right' | 'top-left';
    };
    /**
     * Next.js exposes some options that give you some control over how the server will dispose or keep in memory built pages in development.
     *
     * @see [Configuring `onDemandEntries`](https://nextjs.org/docs/api-reference/next.config.js/configuring-onDemandEntries)
     */
    onDemandEntries?: {
        /** period (in ms) where the server will keep pages in the buffer */
        maxInactiveAge?: number;
        /** number of pages that should be kept simultaneously without being disposed */
        pagesBufferLength?: number;
    };
    /** @see [`next/amp`](https://nextjs.org/docs/api-reference/next/amp) */
    amp?: {
        canonicalBase?: string;
    };
    /**
     * Deploy a Next.js application under a sub-path of a domain
     *
     * @see [Base path configuration](https://nextjs.org/docs/api-reference/next.config.js/basepath)
     */
    basePath?: string;
    /** @see [Customizing sass options](https://nextjs.org/docs/basic-features/built-in-css-support#customizing-sass-options) */
    sassOptions?: {
        [key: string]: any;
    };
    /**
     * Enable browser source map generation during the production build
     *
     * @see [Source Maps](https://nextjs.org/docs/advanced-features/source-maps)
     */
    productionBrowserSourceMaps?: boolean;
    /**
     * By default, Next.js will automatically inline font CSS at build time
     *
     * @default true
     * @since version 10.2
     * @see [Font Optimization](https://nextjs.org/docs/basic-features/font-optimization)
     */
    optimizeFonts?: boolean;
    /**
     * The Next.js runtime is Strict Mode-compliant.
     *
     * @see [React Strict Mode](https://nextjs.org/docs/api-reference/next.config.js/react-strict-mode)
     */
    reactStrictMode?: boolean;
    /**
     * Add public (in browser) runtime configuration to your app
     *
     * @see [Runtime configuration](https://nextjs.org/docs/api-reference/next.config.js/runtime-configuration)
     */
    publicRuntimeConfig?: {
        [key: string]: any;
    };
    /**
     * Add server runtime configuration to your app
     *
     * @see [Runtime configuration](https://nextjs.org/docs/api-reference/next.config.js/runtime-configuration)
     */
    serverRuntimeConfig?: {
        [key: string]: any;
    };
    /**
     * Next.js automatically polyfills node-fetch and enables HTTP Keep-Alive by default.
     * You may want to disable HTTP Keep-Alive for certain `fetch()` calls or globally.
     *
     * @see [Disabling HTTP Keep-Alive](https://nextjs.org/docs/api-reference/next.config.js/disabling-http-keep-alive)
     */
    httpAgentOptions?: {
        keepAlive?: boolean;
    };
    future?: {
        /**
         * @deprecated This option has been removed as webpack 5 is now default
         */
        webpack5?: false;
    };
    /**
     * During a build, Next.js will automatically trace each page and its dependencies to determine all of the files
     * that are needed for deploying a production version of your application.
     *
     * @see [Output File Tracing](https://nextjs.org/docs/advanced-features/output-file-tracing)
     */
    outputFileTracing?: boolean;
    /**
     * Timeout after waiting to generate static pages in seconds
     *
     * @default 60
     */
    staticPageGenerationTimeout?: number;
    /**
     * Add `"crossorigin"` attribute to generated `<script>` elements generated by `<Head />` or `<NextScript />` components
     *
     *
     * @see [`crossorigin` attribute documentation](https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/crossorigin)
     */
    crossOrigin?: false | 'anonymous' | 'use-credentials';
    /**
     * Use [SWC compiler](https://swc.rs) to minify the generated JavaScript
     *
     * @see [SWC Minification](https://nextjs.org/docs/advanced-features/compiler#minification)
     */
    swcMinify?: boolean;
    /**
     * Optionally enable compiler transforms
     *
     * @see [Supported Compiler Options](https://nextjs.org/docs/advanced-features/compiler#supported-features)
     */
    compiler?: {
        reactRemoveProperties?: boolean | {
            properties?: string[];
        };
        relay?: {
            src: string;
            artifactDirectory?: string;
            language?: 'typescript' | 'flow';
        };
        removeConsole?: boolean | {
            exclude?: string[];
        };
        styledComponents?: boolean | {
            /**
             * Enabled by default in development, disabled in production to reduce file size,
             * setting this will override the default for all environments.
             */
            displayName?: boolean;
            topLevelImportPaths?: string[];
            ssr?: boolean;
            fileName?: boolean;
            meaninglessFileNames?: string[];
            minify?: boolean;
            transpileTemplateLiterals?: boolean;
            namespace?: string;
            pure?: boolean;
            cssProp?: boolean;
        };
        emotion?: boolean | {
            sourceMap?: boolean;
            autoLabel?: 'dev-only' | 'always' | 'never';
            labelFormat?: string;
        };
    };
    output?: 'standalone';
    /**
     * Enable experimental features. Note that all experimental features are subject to breaking changes in the future.
     */
    experimental?: ExperimentalConfig;
}
export declare const defaultConfig: NextConfig;
export declare function normalizeConfig(phase: string, config: any): Promise<any>;
export declare function isServerRuntime(value?: string): value is ServerRuntime;
export declare function validateConfig(userConfig: NextConfig): {
    errors?: Array<any> | null;
};
