"use strict";

function datediff(first, second) {
  // Take the difference between the dates and divide by milliseconds per day.
  // Round to nearest whole number to deal with DST.
  return Math.round((second - first) / (1000 * 60 * 60 * 24));
}

function displayLenghtTimeCurrentEmployer() {
  // date début
  var firstDay = new Date(2016, 6, 1);
  var dateCurrentEmployeur = document.getElementById("dateCurrentEmployeur");
  var today = Date();
  var numberOfDays = datediff(new Date(firstDay), new Date(today));
  var numberOfYearsTmp = numberOfDays / 365;
  var numberOfYears = Math.trunc(numberOfYearsTmp);
  var numberOfMonths = Math.trunc(numberOfYearsTmp.toString().split(".")[1] / 1000000000000000 * 12);
  var numberOfMonthsText = numberOfMonths != 0 ? " et " + numberOfMonths + " mois" : "";
  dateCurrentEmployeur.innerHTML = "Depuis " + numberOfYears + " ans" + numberOfMonthsText + ".";
}

displayLenghtTimeCurrentEmployer();