import { KebabCase as KebabCase$1 } from 'type-fest';

/**
 * Changes the casing of a string to kebab case.
 * @param string The input string to change the casing of.
 * @returns A new string with the casing changed to kebab case.
 * @example
 * ```ts
 * kebabCase('fooBar') // 'foo-bar'
 * kebabCase('foo bar') // 'foo-bar'
 * kebabCase('foo-bar') // 'foo-bar'
 * kebabCase('fooBar42') // 'foo-bar42'
 * ```
 */
declare function kebabCase<S extends string>(string: S): KebabCase<S>;
/**
 * Changes the casing of a string to kebab case.
 * @see {@link kebabCase}.
 */
type KebabCase<S extends string> = TrimDashes<ReduceDashes<KebabCase$1<S>>>;
/**
 * Reduces multiple dashes to a single dash.
 * @param S The input string.
 * @returns A new string with multiple dashes reduced to a single dash.
 * @example
 * ```ts
 * ReduceDashes<'foo--bar'> // 'foo-bar'
 * ReduceDashes<'foo-bar'> // 'foo-bar'
 * ReduceDashes<'foo---bar'> // 'foo-bar'
 * ```
 */
type ReduceDashes<S extends string> = S extends `${infer L}--${infer R}` ? ReduceDashes<`${L}-${R}`> : S extends `${infer L}${infer D}--${infer R}` ? ReduceDashes<`${L}${D}-${R}`> : S;
/**
 * Trims dashes from the start and end of a string.
 * @param S The input string.
 * @returns A new string with dashes trimmed from the start and end.
 * @example
 * ```ts
 * TrimDashes<'-foo-bar-'> // 'foo-bar'
 * TrimDashes<'foo-bar-'> // 'foo-bar'
 * TrimDashes<'-foo-bar'> // 'foo-bar'
 * TrimDashes<'foo-bar'> // 'foo-bar'
 * ```
 */
type TrimDashes<S extends string> = S extends `-${infer R}` ? TrimDashes<R> : S extends `${infer L}-` ? TrimDashes<L> : S;

export { type KebabCase, kebabCase };