function toVersion(str = '') {
  const ver = str.split('.').map(i => Number(i));

  if (!ver[0]) {
    ver[0] = 0;
  }

  if (!ver[1]) {
    ver[1] = 0;
  }

  if (!ver[2]) {
    ver[2] = 0;
  }

  return ver;
}

function toNumber(ver) {
  const major = ver[0] * 10000;
  const minor = ver[1] * 100;
  const patch = ver[2] * 1;

  return major + minor + patch;
}

function compare(left, right) {
  if (left > right) {
    return 1;
  } else if (left < right) {
    return -1;
  } else {
    return 0;
  }
}

export default function(left, right) {
  const leftVersion = toNumber(toVersion(left));
  const rightVersion = toNumber(toVersion(right));
  const result = compare(leftVersion, rightVersion);

  return result;
}