export function createUuid() {
  const webCrypto = globalThis.crypto;
  if (typeof webCrypto?.randomUUID === 'function') {
    return webCrypto.randomUUID();
  }

  const bytes = createRandomBytes(16);
  bytes[6] = (bytes[6] & 0x0f) | 0x40;
  bytes[8] = (bytes[8] & 0x3f) | 0x80;
  const hex = Array.from(bytes, (value) => value.toString(16).padStart(2, '0'));
  return `${hex.slice(0, 4).join('')}-${hex.slice(4, 6).join('')}-${hex.slice(6, 8).join('')}-${hex.slice(8, 10).join('')}-${hex.slice(10).join('')}`;
}

export function createRandomHex(length: number) {
  const normalizedLength = Math.max(0, Math.floor(length));
  return Array.from(createRandomBytes(Math.ceil(normalizedLength / 2)), (value) => value.toString(16).padStart(2, '0'))
    .join('')
    .slice(0, normalizedLength);
}

function createRandomBytes(length: number) {
  const bytes = new Uint8Array(length);
  const webCrypto = globalThis.crypto;
  if (typeof webCrypto?.getRandomValues === 'function') {
    webCrypto.getRandomValues(bytes);
    return bytes;
  }
  for (let index = 0; index < bytes.length; index += 1) {
    bytes[index] = Math.floor(Math.random() * 256);
  }
  return bytes;
}