import { Driver } from "unstorage";
/**
 * Configuration options for Archives
 */
export interface ArchivesConfig {
  storage: {
    driver?: Driver;
    cache?: boolean;
    ttl?: number;
    prefix?: string;
  };
  performance: {
    concurrency?: number;
    batchSize?: number;
    timeout?: number;
    retries?: number;
  };
  $env?: Record<string, ArchivesConfig>;
  $development?: ArchivesConfig;
  $production?: ArchivesConfig;
  $test?: ArchivesConfig;
}
type ConfigLayer = Readonly<{
  storage?: Readonly<ArchivesConfig["storage"]>;
  performance?: Readonly<ArchivesConfig["performance"]>;
  $env?: Readonly<Record<string, ConfigLayer>>;
  $development?: ConfigLayer;
  $production?: ConfigLayer;
  $test?: ConfigLayer;
}>;
export type ResolveConfigOptions = Readonly<{
  cwd?: string;
  defaults?: ConfigLayer;
  overrides?: ConfigLayer;
  envName?: string | false;
  configFile?: string;
  rcFile?: string;
}>;
/**
 * Pins config discovery to `cwd` for every later call that passes none.
 *
 * A long-lived server is started by whoever spawns it, in whatever directory
 * that caller happens to be in. Leaving discovery on `process.cwd()` there means
 * the first request executes an `archives.config.ts` belonging to a checkout the
 * server never chose. Library consumers are unaffected: without this call the
 * default stays `process.cwd()`.
 *
 * @param cwd - Directory to resolve `archives.config.ts`, `.archives` and `package.json` from
 */
export declare function setConfigCwd(cwd: string): void;
/**
 * Uses `config` instead of config files until `resetConfig()` or `setConfigCwd()`.
 *
 * @param config - Storage and performance settings over the defaults, without `$env` layers
 * @returns {ArchivesConfig} The config every later `getConfig()` returns
 */
export declare function setConfig(config?: Pick<ConfigLayer, "storage" | "performance">): ArchivesConfig;
/**
 * Load Archives configuration from all available sources
 *
 * @param options - Options.
 * @returns {Promise<ArchivesConfig>} A promise resolving to the operation result.
 */
export declare function resolveConfig(options?: ResolveConfigOptions): Promise<ArchivesConfig>;
/**
 * Reset the cached configuration
 */
export declare function resetConfig(): void;
/**
 * Get the current configuration or resolve it if not already loaded
 *
 * @param options - Options.
 * @returns {Promise<ArchivesConfig>} A promise resolving to the operation result.
 */
export declare function getConfig(options?: ResolveConfigOptions): Promise<ArchivesConfig>;