import uint from "./uint.js";

/**
 * Serializes any signed integer (uint) to hexadecimal code.
 * @name int
 * @kind function
 * @param {number | string | bigint} number A signed integer.
 * @param {number} bytes number of bytes to place the int into
 * @returns {string} Hexstring
 * @ignore
 */
const int = (number, bytes = 1) => {
  number = BigInt(number);
  let signed;
  // negative numbers
  if (number.toString().slice(0, 1) == "-") signed = true;

  const max = BigInt("0x7f".padEnd(2 + bytes * 2, "ff"));
  const min = BigInt("0x80".padEnd(2 + bytes * 2, "00"));
  const andGate = BigInt("0xff".padEnd(2 + bytes * 2, "ff"));

  if (number > max) throw new RangeError("Signed int too large.");
  if (number < -min) throw new RangeError("Signed int too small.");
  if (signed) return uint(number & andGate, bytes);
  return uint(number, bytes);
};

export default int;