/* global VT */
window.VT = window.VT || {};

VT.uuid = function () {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
    var r = (Math.random() * 16) | 0,
      v = c == 'x' ? r : (r & 0x3) | 0x8;
    return v.toString(16);
  });
};

VT.formatDateId = function (date) {
  var y = date.getFullYear();
  var m = date.getMonth() + 1;
  var d = date.getDate();

  return (
    y.toString().padStart(4, '0') +
    '-' +
    m.toString().padStart(2, '0') +
    '-' +
    d.toString().padStart(2, '0')
  );
};

VT.formatDate = function (date) {
  return (
    VT.formatMonth(date) +
    ' ' +
    VT.formatDayOfMonth(date) +
    ' ' +
    date.getFullYear().toString().padStart(4, '0')
  );
};

VT.formatDayOfMonth = function (date) {
  var d = date.getDate();
  var t = d % 10;

  return d === 11 || d === 12 || d === 13
    ? d + 'th'
    : t === 1
    ? d + 'st'
    : t === 2
    ? d + 'nd'
    : t === 3
    ? d + 'rd'
    : d + 'th';
};

VT.DAY_NAMES = [
  'Sunday',
  'Monday',
  'Tuesday',
  'Wednesday',
  'Thursday',
  'Friday',
  'Saturday',
];

VT.formatDayOfWeek = function (date) {
  return VT.DAY_NAMES[date.getDay()];
};

VT.MONTH_NAMES = [
  'January',
  'February',
  'March',
  'April',
  'May',
  'June',
  'July',
  'August',
  'September',
  'October',
  'November',
  'December',
];

VT.formatMonth = function (date) {
  return VT.MONTH_NAMES[date.getMonth()];
};