import { CoerceToUint8ArrayInput } from '@alessiofrittoli/crypto-buffer';

/**
 * Base32 Variant
 *
 * - `'RFC3548'` - Alias for `'RFC4648'`
 * - `'RFC4648'` - [Base32 from RFC4648](https://tools.ietf.org/html/rfc4648)
 * - `'RFC4648-HEX'` - [base32hex from RFC4648](https://tools.ietf.org/html/rfc4648)
 * - `'Crockford'` - [Crockford's Base32](http://www.crockford.com/wrmg/base32.html)
 */
type Variant = 'RFC3548' | 'RFC4648' | 'RFC4648-HEX' | 'Crockford';
interface EncodeOptions {
    /** If set, forcefully enable or disable padding. The default behavior is to follow the default of the selected variant. */
    padding?: boolean;
}
/**
 * Base32 Utility static class.
 *
 * Supported Variants:
 *
 * - `'RFC3548'` - Alias for `'RFC4648'`
 * - `'RFC4648'` - [Base32 from RFC4648](https://tools.ietf.org/html/rfc4648)
 * - `'RFC4648-HEX'` - [base32hex from RFC4648](https://tools.ietf.org/html/rfc4648)
 * - `'Crockford'` - [Crockford's Base32](http://www.crockford.com/wrmg/base32.html)
 */
declare class Base32 {
    /**
     * Base32 Variant
     *
     * - `'RFC3548'` - Alias for `'RFC4648'`
     * - `'RFC4648'` - [Base32 from RFC4648](https://tools.ietf.org/html/rfc4648)
     * - `'RFC4648-HEX'` - [base32hex from RFC4648](https://tools.ietf.org/html/rfc4648)
     * - `'Crockford'` - [Crockford's Base32](http://www.crockford.com/wrmg/base32.html)
     */
    static VARIANT: {
        /** Alias for `'RFC4648'` */
        readonly RFC3548: "RFC3548";
        /** [Base32 from RFC4648](https://tools.ietf.org/html/rfc4648) */
        readonly RFC4648: "RFC4648";
        /** [base32hex from RFC4648](https://tools.ietf.org/html/rfc4648) */
        readonly RFC4648_HEX: "RFC4648-HEX";
        /** [Crockford's Base32](http://www.crockford.com/wrmg/base32.html) */
        readonly Crockford: "Crockford";
    };
    /**
     * Alphabet based on the Base32 Variant.
     *
     */
    private static ALPHABET;
    /**
     * Encode data to Base32.
     *
     * @param	data	The data to encode.
     * @param	variant	The Variant to use.
     * @param	options	( Optional ) An object defining encoding options.
     * @returns	The encoded `data` to Base32 string.
     *
     * ---
     *
     * Supported variants:
     *
     * - `'RFC3548'` - Alias for `'RFC4648'`
     * - `'RFC4648'` - [Base32 from RFC4648](https://tools.ietf.org/html/rfc4648)
     * - `'RFC4648-HEX'` - [base32hex from RFC4648](https://tools.ietf.org/html/rfc4648)
     * - `'Crockford'` - [Crockford's Base32](http://www.crockford.com/wrmg/base32.html)
     */
    static encode(data: CoerceToUint8ArrayInput, variant: Variant, options?: EncodeOptions): string;
    /**
     * Decode a Base32 data.
     *
     * @param	data	The input data to decode.
     * @param	variant	The Variant used to encode the given input.
     * @returns	The `ArrayBuffer` result of decoded `input`.
     */
    static decode(data: CoerceToUint8ArrayInput, variant: Variant): Uint8Array<ArrayBuffer>;
    /**
     * Get the index of the `char` in the Base32 Variant `alphabet`.
     *
     * @param	alphabet	The Base32 Variant alphabet.
     * @param	char		The character.
     * @returns	The index of the `char` in the `alphabet`.
     */
    private static readChar;
    /**
     * Get Variant alphabet and default padding setting.
     *
     * @param	variant The Base32 Variant.
     * @returns	An object with `alphabet` and default `padding` flag based on the given `variant`.
     */
    private static getEncodeVariantAlphabetAndPadding;
    /**
     * Get Variant alphabet and parsed input.
     *
     * @param	input	The input to parse.
     * @param	variant	The Base32 Variant.
     * @returns	An object with `alphabet` and parsed `input` based on the given `variant`.
     */
    private static getDecodeVariantAlphabetAndInput;
    static toString: (input: CoerceToUint8ArrayInput) => string;
}

export { Base32, type Variant };