if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1) {
  HTMLElement.prototype.click = function() {
    var evt = this.ownerDocument.createEvent("MouseEvents");
    evt.initMouseEvent("click", true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
    this.dispatchEvent(evt);
  }
}

document.getElementById("checkList").addEventListener("click", function(ev) {
  if (ev.target && ev.target.nodeName == "LI") {
    ev.target.classList.toggle("checked");
  }
});

function parseXML(name) {
  var xml = new XMLHttpRequest();
  var file = "codes/" + name + ".xml";
  xml.onreadystatechange = function() {
    if (this.status == 200 && this.readyState == 4) {
      var xmlData = xml.responseXML;
      xmlData = (new DOMParser()).parseFromString(xml.responseText, "text/xml");
      xmlData = xmlData.getElementsByTagName("code");

      var i = 0;
      for (; i < xmlData.length; i++) {
        var li = document.createElement("li");
        var desc = xmlData[i].getElementsByTagName("title")[0].textContent;
        var t = document.createTextNode(desc);
        li.appendChild(t);
        li.setAttribute("data-codename", xmlData[i].getElementsByTagName("title")[0].textContent);
        li.setAttribute("data-codeauthor", xmlData[i].getElementsByTagName("author")[0].textContent);
        li.setAttribute("data-codedesc", xmlData[i].getElementsByTagName("description")[0].textContent);
        li.setAttribute("data-codeversion", xmlData[i].getElementsByTagName("version")[0].textContent);
        li.setAttribute("data-codedate", xmlData[i].getElementsByTagName("date")[0].textContent);
        li.setAttribute("data-codesrc", xmlData[i].getElementsByTagName("source")[0].textContent.replace(/[\s\n\r\t]+/gm, ""));
        li.setAttribute("onmouseover", "updateDescription(this)");
        document.getElementById("checkList").appendChild(li);
      }

      button = document.getElementById("downloadButton");
      button.style.visibility = "visible";
      button.disabled = false;
      button = document.getElementById("dolphinDownloadButton");
      button.style.visibility = "visible";
      button.disabled = false;
      button = document.getElementById("gcmDownloadButton");
      button.style.visibility = "visible";
      button.disabled = false;
      document.getElementById("gameID").disabled = false;
    }
  };

  xml.open("GET", file);
  xml.send();
}

function downloadFile(data, filename) {

  var file = new Blob([data], {
    type: "application/octet-stream"
  });

  if (window.navigator.msSaveOrOpenBlob)
    window.navigator.msSaveOrOpenBlob(file, filename);
  else {
    var a = document.createElement("a"),
      url = window.URL.createObjectURL(file);
    a.href = url;
    a.download = filename;
    a.click();
    setTimeout(function() {
      window.URL.revokeObjectURL(url);
    }, 500);
  }
}

function generateGCT() {

  if (document.getElementById("gameID").value === "Choose Version") {
    alert("Select the game version!");
    return;
  }
  var data = "00D0C0DE00D0C0DE";
  var codeList = document.getElementById("checkList").getElementsByTagName("li");
  var valueSelected = false;
  for (var i = 0; i < codeList.length; i++) {
    if (codeList[i].className === "checked") {
      data += codeList[i].getAttribute("data-codeSrc");
      valueSelected = true;
    }
  }

  if (valueSelected) {
    data += "FF00000000000000";
    var rawData = new Uint8Array(data.length / 2);

    for (var x = 0; x < rawData.length; x++) {
      rawData[x] = parseInt(data.substr(x * 2, 2), 16);
    }

    downloadFile(rawData, document.getElementById("gameID").value + ".gct");
  } else {
    alert("No cheat(s) selected!");
  }
}

function generateTXT(s) {
  if (document.getElementById("gameID").value === "Choose Version") {
    alert("Select the game version!");
    return;
  }
  if (s.id === "dolphinDownloadButton") var data = "Paste the following on top of your games .ini file:\r\n[Gecko]";
  else var data = document.getElementById("gameID").value + "\r\nSuper Mario Sunshine";
  var codeList = document.getElementById("checkList").getElementsByTagName("li");
  var valueSelected = false;
  for (var i = 0; i < codeList.length; i++) {
    if (codeList[i].className === "checked") {
      data += "\r\n";
      if (s.id === "gcmDownloadButton") data += "\r\n";
      else data += "$";
      data += codeList[i].getAttribute("data-codeName") + " (" + codeList[i].getAttribute("data-codeDate") + ") [" + codeList[i].getAttribute("data-codeAuthor") + "]\r\n";
      data += (codeList[i].getAttribute("data-codeSrc").match(/.{8}/g).join(" ")).replace(/(.{17})./g, "$1\r\n");
      valueSelected = true;
    }
  }

  if (valueSelected) {
    downloadFile(data, document.getElementById("gameID").value + ".txt");
  } else {
    alert("No cheat(s) selected!");
  }
}

function updateCodelist() {
  resetDescription();
  document.getElementById("gameID").disabled = true;
  button = document.getElementById("downloadButton");
  button.style.visibility = "hidden";
  button.disabled = true;
  button = document.getElementById("dolphinDownloadButton");
  button.style.visibility = "hidden";
  button.disabled = true;
  button = document.getElementById("gcmDownloadButton");
  button.style.visibility = "hidden";
  button.disabled = true;
  document.getElementById("checkList").innerHTML = "";
  var gameVersion = document.getElementById("gameID").value;
  parseXML(gameVersion);
}

function updateDescription(s) {
  document.getElementById("descriptionBox").innerHTML = "<h2>" +
    s.getAttribute("data-codeName") + "</h2><p style=\"margin:0\"><i>Author(s): " +
    s.getAttribute("data-codeAuthor") + "</i></p><p style=\"margin:0\"><i>Version: " +
    s.getAttribute("data-codeVersion") + " (" +
    s.getAttribute("data-codeDate") + ")</i></p>" + "<h4>Description:</h4><p>" +
    s.getAttribute("data-codeDesc") + "</p>";
}

function setButtonDescription(s) {
  if (s.id === "downloadButton")
    document.getElementById("descriptionBox").innerHTML = "<h2>Download GCT</h2><p>Download the cheats in the GCT format for use with Nintendont.</p>";
  else if (s.id === "dolphinDownloadButton")
    document.getElementById("descriptionBox").innerHTML = "<h2>Download for Dolphin</h2><p>Download a textfile containing the formatted codes for use with Dolphin. Copy the contents of the file on top of your games .ini file.</p>";
  else
    document.getElementById("descriptionBox").innerHTML = "<h2>Download for Gecko Cheat Manager</h2><p>Download the cheats in a textfile formatted for use with the <a href=\"http://wiibrew.org/wiki/CheatManager\">Gecko Cheat Manager</a>. Place the txt file in SD:/txtcodes/.</p><p>A zip archive containing pregenerated txt files with all available codes on this site can be downloaded <a href=\"files/GCMCodes.zip\">here</a>.";
}

function resetDescription() {
  document.getElementById("descriptionBox").innerHTML = "<p><h3>Select your codes from the list...</h3></p>";
}

function updateChangelog() {
  var xml = new XMLHttpRequest();
  var file = "changelog.xml";
  xml.onload = function() {
    if (this.status == 200 && this.responseXML != null) {
      var changelogData = xml.responseXML;
      changelogData = (new DOMParser()).parseFromString(xml.responseText, "text/xml");
      changelogData = changelogData.getElementsByTagName("update");

      for (var i = 0; i < changelogData.length && i < 5; i++) {
        document.getElementById("changelog").innerHTML += "<p style=\"margin:0\"><i>" + changelogData[i].getElementsByTagName("date")[0].textContent + ":</i> " + changelogData[i].getElementsByTagName("change")[0].textContent + "</p>";
      }

      document.getElementById("changelog").innerHTML += "<a target=\"_blank\" href=\"changelog.html\"><i>more ...</i></a>";
    };
  }
  xml.open("GET", file);
  xml.send();
}