function date(d = new Date()) {
  if (typeof d === "string") {
    d = new Date(d);
  }

  return datetime(d).split("T")[0];
}

function time(d = new Date()) {
  if (typeof d === "string") {
    d = new Date(d);
  }

  return datetime(d).split("T")[1];
}

function datetime(d = new Date()) {
  if (typeof d === "string") {
    d = new Date(d);
  }

  return new Date(d).toISOString().split(".")[0] + "Z";
}

function pad(value) {
  return value < 10 ? "0" + value : value;
}

function formatOffset(n) {
  const sign = n > 0 ? "-" : "+";
  const offset = Math.abs(n);
  return sign + pad(Math.floor(offset / 60)) + ":" + pad(offset % 60);
}

function offset(d = new Date()) {
  if (typeof d === "string") {
    d = new Date(d);
  }

  return formatOffset(d.getTimezoneOffset());
}

export { date, time, datetime, offset };