export default function theme() {
    document.addEventListener("DOMContentLoaded", function() {
        [].forEach.call(document.querySelectorAll('.language-change'), function(el) {
        el.addEventListener('click', function(e) {
            e.preventDefault();
    
            var lang = el.getAttribute('data-lang');
            if(getCookie('mselang') != lang) {
                setCookie('mselang', lang, false);
                location.reload(); 
            }
            return false;
        })
      });
    
      // Empécher le double clic
      const form = document.forms['login']
      const loader = document.getElementById('loader');
      form.addEventListener('submit', function(event) {
        loader.style.display = 'flex';
      });
    });
       
    function setCookie(name,value,days) {
        var expires = "";
        if (days) {
            var date = new Date();
            date.setTime(date.getTime() + (days*24*60*60*1000));
            expires = "; expires=" + date.toUTCString();
        }
        var temp = window.location.hostname.split('.').reverse();
        var root_domain = '';
        for(var i=temp.length - 1;i >= 0;i--){
            root_domain += temp[i];
            if(i > 0){
                root_domain += '.';
            }
        } 
        document.cookie = name + "=" + (value || "")  + expires + "; path=/; domain=" + root_domain;
    }
    
    function getCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
    }    
}