import { RoutesDefinition } from "./types";
type ChangeFrequency = "always" | "hourly" | "daily" | "weekly" | "monthly" | "yearly" | "never";
export type SitemapItem = {
    loc: string;
    priority?: number;
    lastmod?: string | null;
    changefreq?: ChangeFrequency;
};
type RouteResolverResult = null | undefined | SitemapItem | Array<SitemapItem | null | undefined>;
/**
 * Object-based approach for sitemap generation with compile-time exhaustiveness checking.
 *
 * Instead of builder pattern, this requires all routes to be specified in a single object.
 * Routes that shouldn't be in sitemap are set to null, others have RouteResolver functions.
 *
 * This approach is much faster for TypeScript compiler as it avoids recursive type operations.
 */
export type SitemapRouteResolvers<Locales extends string[], RouteList extends RoutesDefinition<Locales>> = {
    [K in keyof RouteList]: ((routeName: K) => Promise<RouteResolverResult>) | null;
};
export type SitemapGeneratorType = {
    toXml: () => Promise<string>;
    toJson: () => Promise<string>;
};
export type SitemapGeneratorOptions = {
    baseUrl?: string;
    defaultPriority?: number;
    defaultChangeFreq?: ChangeFrequency;
};
export declare class SitemapGenerator<Locales extends string[], RouteList extends RoutesDefinition<Locales>> {
    private routeResolvers;
    private options;
    constructor(resolvers: SitemapRouteResolvers<Locales, RouteList>, options?: SitemapGeneratorOptions);
    private getSitemapItems;
    toXml(): Promise<string>;
    toJson(): Promise<string>;
}
export {};