var Allergies = {};

Allergies.allergenes = [
  'miel',
  'paprika',
  'piment',
  'poivre de cayenne',
  'poivron',
  'chorizo',
  'carvi',
  'cumin',
  'curry',
  'anis',
  'camomille',
  "cire d'abeille",
  'e160c',
  'e901',
  'celeri',
  'céleri'
];

Allergies.process = function(element) {
  var found = Allergies.check_allergenes(element.textContent);
  if(found.length > 0) {
    element.insertBefore(Allergies.warning(found), element.firstChild);
  }
};

Allergies.check_allergenes = function(text) {
  var lower_text = text.toLowerCase();
  return Allergies.allergenes.filter(function(allergene) { return lower_text.indexOf(allergene) >= 0 });
};

Allergies.warning = function(found) {
  var div = document.createElement('div');

  var warning_message = document.createElement('p');
  warning_message.style.color = '#F00';
  warning_message.style.fontSize = '3em';
  warning_message.style.fontWeight = 'bold';
  warning_message.textContent = "ATTENTION";
  div.appendChild(warning_message);

  var message = document.createElement('p');
  message.textContent = "Ce produit contient les allergènes suivants : " + found.join(', ');
  message.style.fontSize = '18px';
  message.style.marginTop = '0';
  div.appendChild(message);

  return div;
};