declare class Multiconf {
  /**
   * Load configs from one or more directories, deep-merged in sequence.
   * Later directories take precedence. Environment variables with the given
   * prefix are merged on top.
   *
   * @param configDir  Path to a config directory, or an array of paths.
   * @param envConfigPrefix  Only env vars starting with this prefix are loaded.
   */
  static get(
    configDir?: string | string[],
    envConfigPrefix?: string,
  ): Record<string, unknown>;

  /**
   * Load only default configs (`*.json.default`) from one or more directories,
   * deep-merged in sequence. Later directories take precedence.
   *
   * @param configDir  Path to a config directory, or an array of paths.
   */
  static getDefault(configDir?: string | string[]): Record<string, unknown>;

  /**
   * Enable or disable template rendering for loaded config values.
   *
   * @param value  `true` to enable template rendering, `false` to disable.
   */
  static setTemplateRendering(value: boolean): typeof Multiconf;

  /**
   * Restrict environment variables exposed to template context.
   * Pass `null` to allow all environment variables.
   *
   * @param varNames  Allowed environment variable names, or `null`.
   */
  static setAllowedEnvVars(varNames: string[] | null): typeof Multiconf;

  /**
   * Set the delimiter used when splitting config directory strings.
   *
   * @param delimiter  Delimiter string used inside `configDir` values.
   */
  static setDirDelimiter(delimiter: string): typeof Multiconf;
}

export = Multiconf;