var DEBUG = false;
var isMobile = false;
var USE_ORIGIN = "";
// TODO: Add check for DOMAIN_OVERRIDE

const dbp = (msg) => {
  if(DEBUG){
    console.log(msg);
  }
};

const dbd = (msg) => {
  if(DEBUG){
    console.dir(msg);
  }
};

const SwalConfig = {
  color: "#79F257",
  background: "#022601",
  buttonsStyling: false,
}

const invalidChars = ['/', '\\', '>', '<', ':', '*', '|', '"', '\'', '?', '\0'];

const replaceInvalid = (str) => {
  var cache = str;
  invalidChars.forEach(ch => {
    cache = cache.replaceAll(ch, "#");
  });
  return cache;
}

const isOverflown = ({ clientHeight, scrollHeight }) => scrollHeight > clientHeight

const setCookie = (cname, cvalue, exdays) => {
  const d = new Date();
  d.setTime(d.getTime() + (exdays*24*60*60*1000));
  let expires = "expires="+ d.toUTCString();
  document.cookie = cname + "=" + cvalue + ";" + expires + ";SameSite=Strict;path=/auth";
}

const resizeText = ({ element, elements, minSize = 10, maxSize = 512, step = 1, unit = 'px' }) => {
  dbp("Resize");
  (elements || [element]).forEach(el => {
    let i = minSize;
    let overflow = false;
    const parent = el.parentNode;
    while (!overflow && i < maxSize) {
      el.style.fontSize = `${i}${unit}`;
      overflow = isOverflown(parent);
      if (!overflow) i += step;
    }
    // revert to last state where no overflow happened
    el.style.fontSize = `${i - step}${unit}`;
  });
}

const saveFile = (name, type, data) => {
  if (data !== null && navigator.msSaveBlob)
    return navigator.msSaveBlob(new Blob([data], { type: type }), name);
  var a = $("<a style='display: none;'/>");
  var url = window.URL.createObjectURL(new Blob([data], {type: type}));
  a.attr("href", url);
  a.attr("download", name);
  $("body").append(a);
  a[0].click();
  window.URL.revokeObjectURL(url);
  a.remove();
}

const disableNonDesktopElements = () => {
  var disableElements = document.getElementsByClassName("desktopOnly");
  for(var i=0; i< disableElements.length; i++){
    var gutter = disableElements.item(i);
    gutter.classList.remove("col-4");
    gutter.classList.add("col-1");
  }
  var content = document.getElementById("content");
  content.style.marginTop = "6vw";
  content.classList.remove("col-4");
  content.classList.add("col-10");
  var te = document.getElementById("resizer");
  window.fitText(te);
  var buttons = document.getElementsByClassName("keyButton");
  for(var i=0; i<buttons.length; i++){
    var bttn = buttons.item(i);
    bttn.style.height = "15vw";
  }
}

const failMsg = (msg) => {
  $("#resizer").html(msg);
  $("#resizer").css("color", "#400112");
  $("#resizer").css("background-color", "#79F257");
  $("#resizer").animate({
    color: "#79F257",
    backgroundColor: "#022601"
  }, 1000);
}

const validatePubKey = (key) => {
  return /^(ssh-rsa AAAAB3NzaC1yc2|ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNT|ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzOD|ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1Mj|ssh-ed25519 AAAAC3NzaC1lZDI1NTE5|ssh-dss AAAAB3NzaC1kc3)[0-9A-Za-z+\/]+[=]{0,3}( .*)?$/.test(key);
}

const sendSSH = (key, id, token) => {
  var payload = {
    pubkey: key,
    userId: id,
    authToken: token
  };
  $.post(USE_ORIGIN+"/auth/setKey.php", payload, (response) => {
    dbp(response);
    if(response.status){
      Swal.fire({
        ...SwalConfig,
        title: "Success!",
        text: "Your key has been uploaded to the server."
      }).then(()=>{
        window.location.reload();
      });
    }else{
      Swal.fire({
        ...SwalConfig,
        title: "Failed!",
        text: response.error
      }).then(()=>{
        window.location.reload();
      });
    }
  }).fail((resp) => {
    dbp("Failed");
    dbd(resp);
    Swal.fire({
      ...SwalConfig,
      title: "Failed!",
      text: resp.toString()
    }).then(()=>{
      window.location.reload();
    });
  });
}

const generateSSH = async (name, id, token) => {
  dbp("Generate Key");
  if (window.location.protocol === "http:") {
    Swal.fire({
      ...SwalConfig,
      title: "Error!",
      text: "You must use HTTPS to generate keys."
    });
    return;
  }
  generateKeyPair("RSASSA-PKCS1-v1_5", 4096, "namehere")
    .then((keys) => {
      var KeyExport = new JSZip();
      name = replaceInvalid(name);
      KeyExport.file("HackersTownTTY-"+name, keys[0]);
      KeyExport.file("HackersTownTTY-"+name+".pub", keys[1]);
      KeyExport.generateAsync({type:"blob"})
        .then((content) => {
          saveFile("HackersTownTTY-"+name+".zip", "application/zip", content);
      });
      sendSSH(keys[1], id, token);
    }).catch((err) => {
      dbp(err);
    });
}

const testSwal = () => {
  Swal.fire({
    ...SwalConfig,
    title: "Success!",
  });
}

const uploadSSH = (id, token) => {
  //request local file
  var kf = document.getElementById("keyfile");
  kf.onchange = function(e) {
    // File selected
    var file = e.target.files[0];
    if(file){
      dbd(file);
      var reader = new FileReader();
      reader.readAsText(file, "UTF-8");
      reader.onload = function (evt) {
        var pubkey = evt.target.result;
        pubkey = pubkey.replace(/\r\n/g, "\n");
        dbp(pubkey);
        pubkey = pubkey.replace(/\n/g, "");
        dbp(pubkey);
        if(validatePubKey(pubkey)){
          sendSSH(pubkey, id, token);
        }else{
          failMsg("Invalid key");
        }
      }
      reader.onerror = function (evt) {
        failMsg("Unable to load Keyfile");
      }

    }
  }
  kf.click();
}

const beginOauth = () => {
  dbp("Auth");
  $.ajax({
    url: USE_ORIGIN+"/auth?act=id"
  }).then((data) => {
    dbd(data);
    if(data.id){
      var redirect = "https://hackers.town/oauth/authorize?"+
        "response_type=code&client_id="+data.id+"&redirect_uri="+
        USE_ORIGIN+"/auth&scope=read:accounts";
      dbp(redirect);
      dbp(window.location.pathname);
      if(window.location.pathname.includes("auth")){
        setCookie("oa_retries", 0, 0.1);
      }
      window.location.href = redirect;
    }else{
      // Auth Failed
      failMsg("AUTH FAILED");
    }
  });
}

const displayFingerprints = () => {
  // Get SSH Fingerprints and display them
  $.get(USE_ORIGIN+"/fingerprint.php", (response) => {
    dbp(response);
    if (response) {
      var html = "<div><table class=\"fingerprintTable\"><tr><th>Bits</th><th>Fingerprint</th><th class=\"text-start\">Algorithm</th></tr>";
      response.split("\n").forEach((line) => {
        var parts = line.split(" ");
        if(parts.length === 4){
          html += "<tr><td class=\"fingerprintBit\">"+parts[0]+"</td><td class=\"fingerprintData\">"+parts[1]+"</td><td class=\"fingerprintAlgo\">"+parts[3].replace("(", "").replace(")", "")+"</td></tr>";
        }
      });
      html += "</table></div>";
      Swal.fire({
        ...SwalConfig,
        title: "SSH Fingerprints",
        html: html
      });
    } else {
      Swal.fire({
        ...SwalConfig,
        title: "Unable to Lookup SSH Fingerprints",
        text: response.error
      });
    }
  });
}

// On Page Load...
$(() => {
  dbp("Begin Init Content");

  // Override domain
  $.get("/DOMAIN_OVERRIDE", function (data) {
    if(data){
      USE_ORIGIN = data.replaceAll("\n", "");
      DEBUG = true;
    }else{
      USE_ORIGIN = "https://tty.hackers.town";
    }

    // Device Detection
    if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|ipad|iris|kindle|Android|Silk|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(navigator.userAgent) ||
      /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(navigator.userAgent.substr(0, 4))) {
      isMobile = true;
    }
    // Adjust for Mobile
    if(isMobile){
      dbp("Is Mobile 👍🏻");
      disableNonDesktopElements();
    }
    // Auto Retry
    var isRetry = false;
    if(window.location.pathname.includes("auth")){
      var ErrorMsg = document.getElementById("ErrorResult");
      dbp(typeof ErrorMsg);
      if(typeof ErrorMsg !== 'undefined' && ErrorMsg.innerText.includes("Retry")){
        dbp("attempt retry");
        isRetry = true;
        // beginOauth();
      }
    }
    // Console Welcome
    if(!isRetry){
      console.log("%cWelcome Hacker!", "color: #ff0000; font-size: 7em; font-style: italic; font-family: 'Times New Roman', Times, serif;");
    }

    // Enable Extra Debug Stuff
    if(DEBUG){
      dbp("Debug Mode Enabled");
      $('.debug').each((i,e)=>{
        e.style.display = "unset";
      });
    }
  })
});