var x, i, j, l, ll, selElmnt, a, b, c;
function initializeCustomSelect() {

  x = document.getElementsByClassName("custom-select");
  l = x.length;

  for (i = 0; i < l; i++) {
    selElmnt = x[i].getElementsByTagName("select")[0];

    var onSelectFunc = x[i].getAttribute('onCustomSelect')

    ll = selElmnt.length;
    if (x[i].querySelectorAll('.select-selected').length == 0) {
      a = document.createElement("DIV");
      a.setAttribute("class", "select-selected");
      a.setAttribute('onCustomSelect', onSelectFunc);
      a.innerHTML = selElmnt.options[selElmnt.selectedIndex].innerHTML;
      x[i].appendChild(a);
      b = document.createElement("DIV");
      b.setAttribute("class", "select-items select-hide");
      for (j = 1; j < ll; j++) {
        c = document.createElement("DIV");
        c.innerHTML = selElmnt.options[j].innerHTML;

        c.addEventListener("click", function (e) {
          var y, i, k, s, h, sl, yl;
          s = this.parentNode.parentNode.getElementsByTagName("select")[0];
          sl = s.length;
          h = this.parentNode.previousSibling;
          for (i = 0; i < sl; i++) {
            if (s.options[i].innerHTML == this.innerHTML) {
              s.selectedIndex = i;
              h.innerHTML = this.innerHTML;
              y = this.parentNode.getElementsByClassName("same-as-selected");
              yl = y.length;
              for (k = 0; k < yl; k++) {
                y[k].removeAttribute("class");
              }
              this.setAttribute("class", "same-as-selected");
              break;
            }
          }
          h.click();
        });
        b.appendChild(c);
      }
      x[i].appendChild(b);
      a.addEventListener("click", function (e) {

        e.stopPropagation();
        if (!this.nextSibling.classList.contains('select-hide') && this.getAttribute('onCustomSelect') != 'null') {
          window[this.getAttribute('onCustomSelect')](this.parentNode.parentNode.getElementsByTagName("select")[0].value, this.parentNode);
        }
        closeAllSelect(this);
        this.nextSibling.classList.toggle("select-hide");
        this.classList.toggle("select-arrow-active");
      });
    }
  }

}


function closeAllSelect(elmnt) {
  /* A function that will close all select boxes in the document,
  except the current select box: */
  var x,
    y,
    i,
    xl,
    yl,
    arrNo = [];
  x = document.getElementsByClassName("select-items");
  y = document.getElementsByClassName("select-selected");
  xl = x.length;
  yl = y.length;
  for (i = 0; i < yl; i++) {
    if (elmnt == y[i]) {
      arrNo.push(i);
    } else {
      y[i].classList.remove("select-arrow-active");
    }
  }
  for (i = 0; i < xl; i++) {
    if (arrNo.indexOf(i)) {
      x[i].classList.add("select-hide");

    }
  }
}

/* If the user clicks anywhere outside the select box,
then close all select boxes: */
document.addEventListener("click", closeAllSelect);
initializeCustomSelect();
