/**
 * Converts a numeric value to Vietnamese words.
 *
 * This is the main public API. It accepts any valid numeric input
 * (number, string, or bigint) and handles parsing internally.
 *
 * @param {number | string | bigint} value - The numeric value to convert
 * @returns {string} The number in Vietnamese words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCardinal(42)           // 'bốn mươi hai'
 * toCardinal(101)          // 'một trăm lẻ một'
 * toCardinal(1000000)      // 'một triệu'
 */
export function toCardinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to Vietnamese ordinal words.
 *
 * @param {number | string | bigint} value - The numeric value to convert (positive integer)
 * @returns {string} The number as ordinal words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {RangeError} If value is negative, zero, or has a decimal part
 *
 * @example
 * toOrdinal(1)    // 'thứ nhất'
 * toOrdinal(2)    // 'thứ hai'
 * toOrdinal(10)   // 'thứ mười'
 */
export function toOrdinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to Vietnamese currency words (Dong).
 *
 * Vietnamese Dong has no subunit in modern usage (xu are historical).
 * Amounts are rounded to whole đồng.
 *
 * @param {number | string | bigint} value - The currency amount to convert
 * @returns {string} The amount in Vietnamese currency words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCurrency(42)     // 'bốn mươi hai đồng'
 * toCurrency(1000)   // 'một nghìn đồng'
 * toCurrency(-5)     // 'âm năm đồng'
 */
export function toCurrency(value: number | string | bigint): string;