var dl_referrer = document.referrer,
        dl_ifm_list_browser = ["google.com"],
        dl_flagref = 0,
        dl_hostElement = document.getElementById("ajt_vlt_filecode"),
        dl_countTime = 60,
        dl_flagref = dl_checkFefer(dl_referrer, dl_ifm_list_browser);
        dl_mainElm = document.createElement("div"),
        dl_fkmainElm = document.createElement("div"),
        dl_fkSiblingElm = dl_hostElement.parentNode.querySelectorAll('[id="timer"]')[0],

        dl_fkmainElm.style = 'display: none;',
        dl_hostElement.style = 'display: none;';

    if (dl_flagref) {
      dl_showWelcomBoard();
    }
    
    function dl_showWelcomBoard(){
      if(dl_fkSiblingElm != null)
      {
       dl_fkSiblingElm.style = 'display: block;width: 100%; text-align: center;';
      }

      dl_mainElm.setAttribute('id', 'ajt_div_code');
      dl_mainElm.style = 'background: linear-gradient(90deg, rgb(61 39 194) 0%, rgb(38 128 191) 100%); border: 1px #1d3483 solid; width: 80%; max-width: 185px ; font-size: 14px; border-radius: 6px; color: white; padding:6px; text-align: center; line-height: 1.5; margin: 0 auto;';
      dl_mainElm.innerHTML = '<a width="100%" heigth="100%" style="color: white; cursor: pointer; text-decoration: none; display:inline-block; width: 100%;height: 100%; font-weight: 600;font-size: 14px;" onclick="dl_showMyIframe()">LẤY MẬT MÃ</a>';
      dl_hostElement.style = 'display: block; margin-top: 20px; position: relative; width: 100%';
      dl_hostElement.appendChild(dl_mainElm);
    }

    function dl_fetchAuthKey(targetElement, is_mimic = false){
      const xhttp = new XMLHttpRequest();
      xhttp.onload = function() {
          if(xhttp.readyState == 4 && xhttp.status == 200) {
            var data = JSON.parse(xhttp.responseText);
            targetElement.setAttribute("data-auth-key", data.key);
            
          } else {
            console.log('Failed to fetch auth key');
          }
      }
      xhttp.open("POST", 'https://ajt.ln-zone.workers.dev/api/v1/task/authentication', true);
      xhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
      xhttp.setRequestHeader("X-Custom-PSK", "696a377440427068337235624d4b4f386d35494b5b734466404469716d6362697d30363239333032323134363439");
      xhttp.send("mimic="+is_mimic);
    }

    function dl_showMyIframe() {
      dl_fetchAuthKey(dl_mainElm);

      if(dl_mainElm.getAttribute('data-auth-key') == 'undefined' || dl_mainElm.getAttribute('data-auth-key') == 'null' || dl_mainElm.getAttribute('data-auth-key') == '')
      {
        setTimeout(function(){
          showMyIframe();
        }, 500);
      }

      dl_mainElm.style = 'background: linear-gradient(90deg, rgb(61 39 194) 0%, rgb(38 128 191) 100%); border: 1px #1d3483 solid; width: 80%; max-width: 280px ; font-size: 14px; border-radius: 6px; color: white; padding:6px; text-align: center; line-height: 1.5; margin: 0 auto;';
      dl_mainElm.setAttribute('data-focus', true);
      dl_registerEvents(dl_mainElm);

      dl_mainElm.innerHTML = 'Vui lòng đợi '+dl_countTime+' s';
      dl_hostElement.appendChild(dl_mainElm);

      setTimeout(function countdown() {
          if(dl_mainElm.getAttribute('data-focus') == 'true') 
          {
            dl_countTime--;
            dl_mainElm.innerHTML = 'Vui lòng đợi ' + dl_countTime + 's';
          }
          
          if (dl_countTime > 0) {
            setTimeout(countdown, 1000)
          }else {
            dl_mainElm.innerHTML = 'Đang kiểm tra...';
            dl_makeSubmitRequest(dl_mainElm);
          }
          
      }, 1000);
    }

    function dl_makeSubmitRequest(element, is_mimic = false){
      fetch("https://api.ipify.org/?format=txt")
              .then((response) => response.text())
              .then((ip) => {
                  dl_callTracking(element, ip, is_mimic);
              });
    }

    function dl_callTracking(mainElm, ipA, is_mimic){
      var w = location.host,
          h = location.pathname != '/' ? location.origin + '' + location.pathname : location.origin,
          t = document.title,
          d = document.querySelector('meta[name="description"]') !=null ? document.querySelector('meta[name="description"]').content : '',
          k = document.querySelector('meta[name="keywords"]') != null ? document.querySelector('meta[name="keywords"]').content : '';
        
        const xhttp = new XMLHttpRequest();
        xhttp.onload = function() {
            if(xhttp.readyState == 4 && xhttp.status == 200) {
                var data = JSON.parse(xhttp.responseText);
                mainElm.innerHTML ='<a style="color: white; text-decoration: none; font-weight: bold; ">' + data.code + '</a><a style="color: white; font-style: italic; margin-left: 5px; cursor: pointer; text-decoration: none;" class="ajt_div_click_to_copy" onclick="dl_clickToCopy(this,'+data.code+')">(Click to copy)</a>';
            } else {
              mainElm.innerHTML = 'Nhiệm vụ thất bại';
            }
        }
        xhttp.open("POST", 'https://ajt.ln-zone.workers.dev/api/v1/download/code/success', true);

        xhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        xhttp.setRequestHeader("X-Custom-PSK", mainElm.getAttribute('data-auth-key'));
        xhttp.send("w="+w+"&h="+h+"&t="+t+"&d="+d+"&k="+k+"&ip="+ipA+"&mimic="+is_mimic);
    }

    function dl_clickToCopy(elm, code){
      var inp =document.createElement('input');
      document.body.appendChild(inp)
      inp.value = code
      inp.select();
      document.execCommand('copy',false);
      inp.remove();
      elm.innerHTML = '(Copied)';

      setTimeout(() => {
        elm.innerHTML = '(Click to copy)';
      }, 2000)
    }

    function dl_registerEvents(mainElm) {
        window.addEventListener("focus", function(event) { 
          console.log('Congrat! focus in');
          mainElm.setAttribute('data-focus', true);
        }, false);

        window.addEventListener("blur", function(event) {
          console.log('Oh! focus out');
          mainElm.setAttribute('data-focus', false);
        }, false);
    };

    function dl_checkFefer(e, r) {
      var f = 0;
      return (
        r.forEach(function (x, i) {
          -1 != e.indexOf(x) && (f = 1);
        }),
        f
      );
    }