import { AstroIntegration } from "astro";
/**
* Adapter-specific options passed to the server entrypoint via a Vite virtual
* module at build time. Runtime values like `buildClientDir` and
* `buildServerDir` come from `app.manifest` instead.
*/
interface AdapterOptions {
	/** Hostname or boolean (`true` = `"0.0.0.0"`, `false` = `"localhost"`). */
	host: string | boolean;
	/** Port the server listens on. */
	port: number;
	/** Relative path to the adapter directory within `dist/server/` (e.g. `".astro-bun-adapter"`). Resolved at runtime against the server directory. */
	adapterDir: string;
	/**
	* `Cache-Control` header for non-hashed static assets. Hashed assets
	* (`/_astro/*`) always use `public, max-age=31536000, immutable`.
	*/
	staticCacheControl: string;
	/** Image endpoint route with leading slash (e.g. "/_image"). */
	imageEndpointRoute: string;
	/**
	* ISR (Incremental Static Regeneration) caching configuration.
	* `false` disables ISR; otherwise holds the resolved ISR options.
	*/
	isr: false | ISROptions;
}
/** Resolved ISR configuration passed to the server entrypoint. */
interface ISROptions {
	maxByteSize: number;
	cacheDir?: string;
	preFillMemoryCache: boolean;
}
/**
* User-facing ISR (Incremental Static Regeneration) configuration options.
* All properties are optional — omitted values use their documented defaults.
*/
interface ISRConfig {
	/**
	* Maximum byte size of the in-memory LRU cache. Entries evicted from memory
	* are persisted to disk and reloaded on demand.
	*
	* @default 50 * 1024 * 1024 // (50 MB)
	*/
	maxByteSize?: number;
	/**
	* Absolute path to the directory for persistent ISR cache storage.
	*
	* @default "<server directory>/.astro-bun-adapter/isr-cache"
	*/
	cacheDir?: string;
	/**
	* Whether to pre-fill the in-memory LRU cache from disk at startup. When
	* `false`, the disk index is restored for L2 fallback but entries are only
	* loaded into memory on first access.
	*
	* @default false
	*/
	preFillMemoryCache?: boolean;
}
/** User-facing configuration for the Bun adapter. */
interface BunAdapterConfig {
	/**
	* Override the default `Cache-Control` header for non-hashed static assets.
	* Hashed assets under `/_astro/` always use
	* `public, max-age=31536000, immutable`. Route-level
	* `staticHeaders` still take precedence over this value.
	*
	* @default "public, max-age=86400, must-revalidate"
	*/
	staticCacheControl?: string;
	/**
	* Enable ISR (Incremental Static Regeneration). When `true`, SSR responses
	* with `s-maxage` and optional `stale-while-revalidate` Cache-Control
	* directives are cached in-memory (up to 50 MB by default) and served
	* according to standard cache semantics. Pass an object to customize the
	* maximum cache byte size. Disabled by default — zero overhead when off.
	*
	* @default false
	*
	* @example
	* // Use defaults (maxByteSize: 50 MB)
	* bun({ isr: true })
	*
	* @example
	* // Custom cache byte size (100 MB)
	* bun({ isr: { maxByteSize: 100 * 1024 * 1024 } })
	*/
	isr?: boolean | ISRConfig;
}
/** Create the Astro integration that configures and registers the Bun adapter. */
declare function bun(adapterConfig?: BunAdapterConfig): AstroIntegration;
export { bun as default, ISRConfig, AdapterOptions };