import type Joi from 'joi';
import { type OutputFormatter } from './text/ansi';
interface SchemaLine {
    level: number;
    text: string;
}
/** the leaf type, description, and any enumerated valid values of a schema path */
export interface SchemaPathInfo {
    readonly type?: string;
    readonly description?: string;
    readonly valids?: readonly unknown[];
}
/** walk a Joi schema {@link Joi.Description|description} down a key path, returning the leaf's {@link SchemaPathInfo} (empty if the path does not exist) */
export declare function descriptionPathInfo(description: Joi.Description, path: readonly string[]): SchemaPathInfo;
/** {@link descriptionPathInfo} straight from a schema (describes it once per call) */
export declare function schemaPathInfo(schema: Joi.Schema, path: readonly string[]): SchemaPathInfo;
/**
 * The first path segment the schema does not accept, with the keys that ARE accepted there and the path to that
 * point -- or `undefined` when the whole path is a settable key. Used to reject typo'd config keys. A `.pattern()`
 * object accepts any key (validation continues into its value schema) and an `.unknown(true)` object (e.g. a
 * `specializeConfig` entry, which may overwrite any config key) accepts any key, so neither is reported as unknown.
 */
export declare function firstUnknownSchemaSegment(description: Joi.Description, path: readonly string[]): {
    readonly segment: string;
    readonly available: readonly string[];
    readonly at: readonly string[];
} | undefined;
/**
 * The keys a schema {@link Joi.Description|description} offers below `path`, i.e. every option that may be set there.
 * In contrast to the keys of a value, this covers the optional ones that are unset as well.
 */
export declare function descriptionPathKeys(description: Joi.Description, path: readonly string[]): string[];
/** every settable path in a schema description, intermediate objects included */
export declare function descriptionPaths(description: Joi.Description, path?: readonly string[]): string[][];
/**
 * Describes a Joi schema in a human-readable way.
 */
export declare function describeSchema(schema: Joi.Schema, f?: OutputFormatter): string;
/**
 * Provides a generic description for any Joi schema.
 * You probably want to use {@link describeSchema}.
 */
export declare function genericDescription(level: number, formatter: OutputFormatter, name: string, desc: Joi.Description | undefined): SchemaLine[];
/**
 * Creates the header line(s) for a schema description.
 */
export declare function headerLine(level: number, formatter: OutputFormatter, name: string, type: string, flags: object | undefined): SchemaLine[];
/**
 * Describes a Joi object schema.
 */
export declare function describeObject(level: number, formatter: OutputFormatter, desc: Joi.Description): SchemaLine[];
export {};