function compute_moyenne() {
  var notes = $(".tf_field_note input")
    .map(function () {
      return parseFloat($(this).val());
    })
    .get();
  // les coefs sont donnes (ECTS en BUT)
  let coefs = $("form.tf_ext_edit_ue_validations").data("ue_coefs");
  // ou saisis (formations classiques)
  if (coefs == "undefined") {
    coefs = $(".tf_field_coef input")
      .map(function () {
        return parseFloat($(this).val());
      })
      .get();
  }
  var N = notes.length;
  var dp = 0;
  var sum_coefs = 0;
  for (var i = 0; i < N; i++) {
    if (!(isNaN(notes[i]) || isNaN(coefs[i]))) {
      dp += notes[i] * coefs[i];
      sum_coefs += coefs[i];
    }
  }
  let moy = dp / sum_coefs;
  if (isNaN(moy)) {
    moy = "-";
  }
  if (typeof moy == "number") {
    moy = moy.toFixed(2);
  }
  return moy;
}

// Callback select menu (UE code)
function enable_disable_fields_cb() {
  enable_disable_fields(this);
}
function enable_disable_fields(select_elt) {
  // input fields controled by this menu
  var input_fields = $(select_elt)
    .parent()
    .parent()
    .find("input:not(.ext_coef_disabled)");
  var disabled = false;
  if ($(select_elt).val() === "None") {
    disabled = true;
  }
  input_fields.each(function () {
    if (disabled) {
      let cur_value = $(this).val();
      $(this).data("saved-value", cur_value);
      $(this).val("");
    } else {
      let saved_value = $(this).data("saved-value");
      if (typeof saved_value == "undefined") {
        saved_value = "";
      }
      if (saved_value) {
        $(this).val(saved_value);
      }
    }
  });
  input_fields.prop("disabled", disabled);
}
function setup_text_fields() {
  $(".ueext_valid_select").each(function () {
    enable_disable_fields(this);
  });
}

$().ready(function () {
  $(".tf_ext_edit_ue_validations").change(function () {
    $(".ext_sem_moy_val")[0].innerHTML = compute_moyenne();
  });
  $("form.tf_ext_edit_ue_validations input").blur(function () {
    $(".ext_sem_moy_val")[0].innerHTML = compute_moyenne();
  });
  $(".ueext_valid_select").change(enable_disable_fields_cb);

  setup_text_fields();
});