export declare type ConfigOptionalArray<T> = undefined | null | false | true | T | T[];
export declare enum CacheType {
    /**
     * Disable caching (useful for APIs)
     */
    None = "none",
    /**
     * Short time caching (useful for normal files likes index.html). Currently one minute
     */
    Short = "short",
    /**
     * Long term caching. Currently 7 days
     */
    Long = "long",
    /**
     * For files that never changed, usually with versions or hashes in their names. Currently one year. Adds `Cache-Control: immutable`
     */
    Immutable = "immutable"
}
export interface SPAServerHealthcheckConfig {
    /**
     * HTTP path on which to serve this healthcheck endpoint
     */
    readonly path: string;
    /**
     * Object containing data to serve on this endpoint or a function to generate said data
     */
    readonly data?: any | (() => any);
}
export declare enum Preset {
    /**
     * Serve root without presets with only short time caching.
     * **Do not use this**, it removes greatest benefit of SPA-PROD
     */
    None = "none",
    /**
     * Preset for Create React APP
     * @see https://facebook.github.io/create-react-app/
     */
    CRA = "cra"
}
export interface SPAServerFolder {
    /**
     * Directory where to recursively look for files
     */
    readonly root: string;
    /**
     * HTTP path from which to server this folder
     * @default /
     */
    readonly path?: string;
    /**
     * Caching policy for files in this folder.
     * You will usually want to use either `short` or `immutable`.
     * Each policy has it's own headers
     * @default "short"
     */
    readonly cache?: CacheType;
}
export interface SPACSPConfig {
    /**
     * Additional CSP rules
     * @example
     * {
     *   'script-src': ['https://example.com'],
     *   'style-src': ['data:'],
     * }
     */
    readonly append?: Record<string, string[]>;
    /**
     * CSP report uri
     * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/report-uri
     */
    readonly reportUri?: string;
    /**
     * Run CSP in report only mode. Requires `reportUri`
     * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
     * @default false
     */
    readonly reportOnly?: boolean;
    /**
     * Enable `require-sri-for` directive
     * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/require-sri-for
     * @default false
     */
    readonly requireSri?: boolean;
}
export interface SPAServerConfig {
    /**
     * Listen port
     * Do not forget to update HEALTHCHECK in your Dockerfile if you change this from 8080
     * @default 8080
     */
    readonly port: number;
    /**
     * Folders to serve
     */
    readonly folders: SPAServerFolder[];
    /**
     * Index.html file path
     */
    readonly index: string;
    /**
     * Working directory for relative paths.
     * This is set automatically by CLI to be folder of the config file
     */
    readonly cwd?: string;
    /**
     * Healthcheck endpoint configuration
     */
    readonly healthcheck?: ConfigOptionalArray<SPAServerHealthcheckConfig>;
    /**
     * Should logs be printed?
     */
    readonly silent?: boolean;
    /**
     * Whitelisted environment variables to be injected into index
     */
    readonly envs?: string[];
    /**
     * Property to inject envs into
     * @default "window.__env"
     */
    readonly envsPropertyName?: string;
    /**
     * Send 403 for source maps when false. This should be set to `false` in real PROD environment (but it is very useful in DEV envs)
     * @default true
     */
    readonly sourceMaps?: boolean;
    /**
     * Inject prefetch links into index HTML for js and css assets
     * @default true
     */
    readonly prefetch?: boolean;
    /**
     * Enable Subresource Integrity tag injection into index for styles and scripts
     * @see https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity
     * @default true
     */
    readonly sri?: boolean;
    /**
     * Enable Content Security Policy
     * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
     * @default false
     */
    readonly csp?: SPACSPConfig | boolean;
    /**
     * Basic authentication username
     */
    readonly username?: string;
    /**
     * Basic authentication password
     */
    readonly password?: string;
    /**
     * Send `X-Powered-By` header (SPA-PROD, Express)
     * @default true
     */
    readonly poweredBy?: boolean;
}