var style_cookie = 'weabot_style_ib';

function set_stylesheet(styletitle) {
  var css=document.getElementById("css");
  if(css) {
    css.href="/static/css/" + styletitle.toLowerCase()+".css";
    localStorage.setItem(style_cookie, styletitle);
  }
}

if(style_cookie && localStorage.hasOwnProperty(style_cookie)) {
  set_stylesheet(localStorage.getItem(style_cookie));
}

var hiddenthreads = Array();
/* IE/Opera fix, because they need to go learn a book on how to use indexOf with arrays */
if (!Array.prototype.indexOf) {
  Array.prototype.indexOf = function(elt /*, from*/) {
	var len = this.length;
	var from = Number(arguments[1]) || 0;
	from = (from < 0) ? Math.ceil(from) : Math.floor(from);
	if (from < 0) from += len;
	for (; from < len; from++) {
    if (from in this && this[from] === elt) return from;
	}
	return -1;
  };
}

function postClick(num) {
  var sel = window.getSelection().toString();
  if (sel) sel = sel.replace(/^/gm, ">") + "\n";
  insert(">>"+num+"\n"+sel);
}

function insert(text) {
	var textarea=document.forms.postform.message;
	if(textarea) {
		if(textarea.createTextRange && textarea.caretPos) { // IE 
			var caretPos=textarea.caretPos;
			caretPos.text=caretPos.text.charAt(caretPos.text.length-1)==" "?text+" ":text;
		} else if(textarea.setSelectionRange) { // Firefox 
			var start=textarea.selectionStart;
			var end=textarea.selectionEnd;
			textarea.value=textarea.value.substr(0,start)+text+textarea.value.substr(end);
			textarea.setSelectionRange(start+text.length,start+text.length);
		} else { textarea.value+=text+" "; }
		textarea.focus();
	}
  return false;
}

function quote(b, a) { 
	var v = eval("document." + a + ".message");
	v.value += ">>" + b + "a\ndfs";
	v.focus();
}

function checkhighlight() {
	var match;
	if(match=/#i([0-9]+)/.exec(document.location.toString()))
	if(!document.forms.postform.message.value)
	insert(">>"+match[1]+"\r\n");
	if(match=/#([0-9]+)/.exec(document.location.toString()))
	highlight(match[1]);
}

function highlight(post) {
	var cells = document.getElementsByClassName("reply");
	for(var i=0;i<cells.length;i++) if(cells[i].className == "reply highlight") cells[i].className = "reply";
	var reply = document.getElementById("reply" + post);
	if(reply) {
		reply.className = "reply highlight";
		var match = /^([^#]*)/.exec(document.location.toString());
		document.location = match[1] + "#" + post;
	}
}

function expandimg(e) {
  var post_id = e.dataset.id;
  var img_url = e.href;
  var thumb_url = e.dataset.thumb;
  var img_w = parseInt(e.dataset.w);
  var img_h = parseInt(e.dataset.h);
  var thumb_w = parseInt(e.dataset.tw);
  var thumb_h = parseInt(e.dataset.th);
  var format = img_url.substring(img_url.lastIndexOf(".")+1, img_url.length);
  var exp_vid = 0;

  if(window.innerWidth > 900) var ratio = Math.min((window.innerWidth-130) / img_w, 1);
  else var ratio = Math.min((window.innerWidth-40) / img_w, 1);

  if(thumb_w < 1) return true;
  
  var img_cont = document.getElementById("thumb" + post_id);
  var post_block = img_cont.parentElement.parentElement.getElementsByTagName("blockquote")[0];
  var img;
  
  for(var i = 0; i < img_cont.childNodes.length; i++)
    if(img_cont.childNodes[i].nodeName.toLowerCase() == "img") {
      img = img_cont.childNodes[i];
    } else if(img_cont.childNodes[i].nodeName.toLowerCase() == "video") {
      img = img_cont.childNodes[i];
      exp_vid = 1;
    }
  
  if(img) {
    if( (format == "webm") && (exp_vid == 0) ) var new_img = document.createElement("video");
    else var new_img = document.createElement("img");
    new_img.setAttribute("class", "thumb");
    new_img.setAttribute("alt", "" + post_id);
    
    if( (img.getAttribute("width") == ("" + thumb_w)) && (img.getAttribute("height") == ("" + thumb_h)) ) {
      // thumbnail -> fullsize
      if(format == "webm") {
        new_img.setAttribute("controls", "");
        new_img.setAttribute("loop", "");
        new_img.setAttribute("autoplay", "");
      }
      new_img.setAttribute("src", "" + img_url);
      new_img.setAttribute("width", img_w);
      new_img.setAttribute("height", img_h);
      new_img.setAttribute("style", "max-width:"+Math.floor((img_w*ratio))+"px;max-height:"+Math.floor((img_h*ratio))+"px;");
      post_block.setAttribute("style", "");
      img_cont.style.display = 'table';
    } else {
      // fullsize -> thumbnail
      if(format == "webm") {
        new_img.removeAttribute("controls");
        new_img.removeAttribute("loop");
        new_img.removeAttribute("autoplay");
      }
      new_img.setAttribute("src", "" + thumb_url);
      new_img.setAttribute("width", thumb_w);
      new_img.setAttribute("height", thumb_h);
      post_block.setAttribute("style", "margin-left:"+(parseInt(thumb_w)+40)+"px;max-width:"+(1000-parseInt(thumb_w))+"px");
      img_cont.removeAttribute("style");
    }

    while(img_cont.lastChild) img_cont.removeChild(img_cont.lastChild);
    
    img_cont.appendChild(new_img);
  }
}

function filePreview(e) {
  var file = postform.file.files[0];
  var inpt = document.getElementById("file");
  var prev = document.getElementById("filepreview");
  var noimg = document.getElementById("noimage");
  if (noimg) noimg = document.getElementById("noimage").parentNode;
  if (file.size > (maxsize*1024)) { inpt.value = ""; return alert("El archivo es muy grande. El tamaño máximo es " + maxsize + " KB."); }
  if (!types.includes(inpt.value.slice(inpt.value.lastIndexOf(".")+1).toUpperCase())) { inpt.value = ""; return alert("Tipo de archivo no soportado."); }
  var read = new FileReader();
  read.readAsDataURL(file);
  read.onload = function(){
    inpt.style.display = "none";
    if (noimg) noimg.style.display = "none";
    prev.removeAttribute("style");
    var fname = (file.name.length < 20) ? file.name : file.name.substr(0, 19) + "…";
    if (file.type.startsWith("image")) prev.insertAdjacentHTML('beforeend', '<img class="thumbpreview" src="' + read.result + '" /> ' + fname);
    else prev.insertAdjacentHTML('beforeend', fname);
    prev.appendChild(document.createTextNode(" ["));
    var btn = document.createElement("a");
    btn.href = "#";
    btn.innerText = "Quitar"
    btn.addEventListener("click", function(e) {
      e.preventDefault();
      prev.innerHTML = "";
      prev.style.display = "none";
      inpt.removeAttribute("style");
      if (noimg) noimg.removeAttribute("style");
      inpt.value = "";
    });
    prev.appendChild(btn);
    prev.appendChild(document.createTextNode("] "));
  };
}

function togglethread(e) {
  if(e.parentElement.id.startsWith("unhide")) {
    var threadid = e.parentElement.id.substr(6);
  } else if(e.parentElement.parentElement.id.startsWith("thread")) {
    var threadid = e.parentElement.parentElement.id.substr(6);
  } else { return; }
  if (hiddenthreads.toString().indexOf(threadid) !== -1) {
    document.getElementById("unhide" + threadid).style.display = "none";
    document.getElementById("thread" + threadid).removeAttribute("style");
    hiddenthreads.splice(hiddenthreads.indexOf(threadid), 1);
  } else {
    document.getElementById("unhide" + threadid).removeAttribute("style");
    document.getElementById("thread" + threadid).style.display = "none";
    hiddenthreads.push(threadid);
  }
  if (hiddenthreads == "") localStorage.removeItem("hiddenthreads");
  else localStorage.setItem("hiddenthreads", hiddenthreads.join("!"));
}

function saveInputs(e) {
  var e = e || window.event;
  var form = e.target || e.srcElement;
  if(typeof(form.fielda) !== "undefined") weabot.name = form.fielda.value;
  if(typeof(form.fielda) !== "undefined") weabot.email = form.fieldb.value;
  localStorage.setItem("weabot", JSON.stringify(weabot));
}

function setInputs(id) {
  if (document.getElementById(id)) {
    with(document.getElementById(id)) {
    if(typeof(fielda) !== 'undefined' && !fielda.value && weabot.name) fielda.value = weabot.name;
    if(typeof(fielda) !== 'undefined' && !fieldb.value && weabot.email) fieldb.value = weabot.email;
    if(!password.value) password.value = getPassword();
    addEventListener("submit", saveInputs);
    }
  }
}

function getPassword() {
  if (weabot.password) return weabot.password;
  var pass="";
  var char="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789?!-_.";
  while (pass.length<10) {
    pass += char[Math.floor(Math.random()*char.length)];
  }
  weabot.password = pass;
  localStorage.setItem("weabot", JSON.stringify(weabot));
  return(pass);
}

function catSort(type) {
  for(var i=0;i<srt.length;i++) srt[i].innerHTML=srt[i].innerText;
  srt[type].innerHTML = "<b>"+srt[type].innerText+"</b>";
  var cont = document.getElementById("catalog");
  var elem = document.getElementsByClassName("thread");
  var arr = Array.prototype.slice.call(elem);
  if (type==0) arr.sort(function (a,b) { return (a.dataset.num-b.dataset.num) });
  else if (type==1) arr.sort(function (a,b) { return (b.dataset.id-a.dataset.id) });
  else if (type==2) arr.sort(function (a,b) { return (a.dataset.id-b.dataset.id) });
  else if (type==3) arr.sort(function (a,b) { return (b.dataset.res-a.dataset.res) });
  else if (type==4) arr.sort(function (a,b) { return (a.dataset.res-b.dataset.res) });
  for (var j=0;j<arr.length;j++) cont.appendChild(arr[j]);
  localStorage.setItem("catalog", JSON.stringify(opcs));
}

function catSearch() {
  var filter = document.getElementById("cat_search").value.toLowerCase();
  var nodes = document.getElementsByTagName("p");
  for (i = 0; i < nodes.length; i++) {
    if (nodes[i].innerText.toLowerCase().includes(filter))
      nodes[i].parentNode.removeAttribute("style");
    else nodes[i].parentNode.style.display = "none";
  }
}

function catThumbs(big) {
  var btn = document.getElementById("cat_size");
  var cat = document.getElementById("catalog");
  var threads = document.getElementsByClassName("thread");
  if (opcs.big) {
    cat.className = "enlarged";
    for (j = 0; j < threads.length; j++) {
      img = threads[j].getElementsByTagName("a")[0];
      img.innerHTML = img.innerHTML.replace("/cat/", "/thumb/");
    }
    btn.innerText = "Grande";
  } else {
    cat.removeAttribute("class");
    for (j = 0; j < threads.length; j++) {
      img = threads[j].getElementsByTagName("a")[0];
      img.innerHTML = img.innerHTML.replace("/thumb/", "/cat/");
    }
    btn.innerText = "Pequeño";
  }
  localStorage.setItem("catalog", JSON.stringify(opcs));
}

function catTeasers(teaser) {
  var btn = document.getElementById("cat_hide");
  if (!teaser) {
    var style = document.createElement("style");
    style.id = "teaser_style";
    style.type = "text/css";
    style.innerText = '#catalog p{display:none}';
    document.head.appendChild(style);
    btn.innerText = "Mostrar";
  } else {
    var style = document.getElementById("teaser_style");
    if (style) style.parentNode.removeChild(style);
    btn.innerText = "Ocultar";
  }
  localStorage.setItem("catalog", JSON.stringify(opcs));
}

function catMenu(e) {
  var brd = document.getElementsByName("board")[0].value;
  var id = this.dataset.id;
  this.insertAdjacentHTML('afterbegin', '<div id="thread_ctrl" style="margin-bottom:3px;">[<a href="/cgi/report/' + brd + '/' + id + '">Denunciar</a>] [<a href="#" class="hh">Ocultar</a>]');
  this.getElementsByClassName("hh")[0].addEventListener("click", function(e) {
    document.getElementById("cat" + id + brd).style.display = "none";
    hiddenthreads.push(id + brd);
    localStorage.setItem("hiddenthreads", hiddenthreads.join("!"))
    if (document.getElementById("hidden_label")) { hidden_num++; document.getElementById("hidden_num").innerText = hidden_num; }
    else { hidden_num = 1; catHidden(); }
  });
}

function catMenuClose(e) { document.getElementById("thread_ctrl").remove(); }

function catHidden() {
  var menu = document.getElementById("ctrl");
  menu.insertAdjacentHTML('beforeend', ' <span id="hidden_label">[Hilos ocultos: <span id="hidden_num">' + hidden_num + '</span> - ');
  var lbl = document.getElementById("hidden_label");
  var shw = document.createElement("a");
  shw.href = "#"; shw.innerText = "Deshacer";
  shw.addEventListener("click", function(e) {
    e.preventDefault();
    for(var i=0;i<hiddenthreads.length;i++){
      try {document.getElementById("cat" + hiddenthreads[i]).removeAttribute("style");}
      catch(err) { continue; } }
    lbl.parentElement.removeChild(lbl); hidden_num = 0;
    var aux = hiddenthreads.join("!");
    var exp = new RegExp("\\b[0-9]+" + document.getElementsByName("board")[0].value + "\\b", "g");
    aux = aux.replace(exp, "!"); aux = aux.replace(/!+/g, "!"); aux = aux.replace(/(^!|!$)/g, "");
    if (aux == "") { localStorage.removeItem("hiddenthreads"); hiddenthreads = []; }
    else { localStorage.setItem("hiddenthreads", aux); hiddenthreads = aux.split("!"); }
  });
  lbl.appendChild(shw); lbl.appendChild(document.createTextNode("]"));
}

function applyTheme() {
  var newTheme = document.getElementById("styles").value;
  set_stylesheet(newTheme);
}

function readableSize(B) {
  var thresh = 1024;
  if(Math.abs(B) < thresh) return B + " B";
  var units = ["KB","MB","GB"];
  var u = -1;
  do {
    B /= thresh;
    ++u;
  } while(Math.abs(B) >= thresh && u < units.length - 1);
  return B.toFixed(1)+" "+units[u];
}

function fixFileSize(){
  var obj = document.getElementsByClassName("fs");
  for (var i=0; i<obj.length; i++){
    var parts = obj[i].childNodes[2].textContent.split(" B, ");
    var filesize = parts[0].substring(2);
    obj[i].childNodes[2].textContent = "-(" + readableSize(filesize) + ", " + parts[1];
  }
}

document.addEventListener("DOMContentLoaded", function(e) {
  checkhighlight();
  if (localStorage.hasOwnProperty("weabot")) weabot = JSON.parse(localStorage.getItem("weabot"));
  else weabot = {"name":null,"email":null,"password":null};
  
  board = document.body.dataset.brd;
  var a = document.getElementById("main_nav").getElementsByTagName("a");
  for(var i=0; i<a.length; i++) {
    if (a[i].getAttribute("href") == "/"+board+"/") {a[i].className = "cur_brd"; break;}
  }

  if (screen.width<720) {
    var head=document.getElementById("main_nav");
    var b=head.getElementsByTagName("a");
    var s=document.createElement("select");
    for(var i=1;i<b.length;i++) {
      var o = document.createElement("option");
      o.value = b[i].href;
      o.textContent = b[i].textContent;
      if(b[i].className=="cur_brd") o.defaultSelected = true;
      s.appendChild(o);
    }
    s.addEventListener("change", function(e){ window.location.href=this.value; });
    head.removeChild(head.childNodes[0]);
    head.className = "mob fix";
    head.insertBefore(s, head.childNodes[0]);
  }

  if(localStorage.hasOwnProperty("hiddenthreads")) {
    hiddenthreads = localStorage.getItem("hiddenthreads").split("!");
    if (document.getElementById("catalog")) {
      hidden_num = 0;
      for(var i=0;i<hiddenthreads.length;i++){
        try {
          document.getElementById("cat" + hiddenthreads[i]).style.display = "none";
          hidden_num++;
        } catch(err) { continue; }
      }
      if (hidden_num) { catHidden(); }
    } else {
      for(var i=0;i<hiddenthreads.length;i++){
        try {
          document.getElementById("unhide" + hiddenthreads[i]).removeAttribute("style");
          document.getElementById("thread" + hiddenthreads[i]).style.display = "none";
        } catch(err) { continue; }
      }
    }
  }

  var styleSelect = document.getElementById("styles");
  if (styleSelect) {
    styleSelect.addEventListener("change", applyTheme, false);
    styleSelect.value = localStorage.getItem(style_cookie);
  }

  if (document.getElementById("postform")) {
    setInputs("postform");
    maxsize = document.getElementById("maxsize").innerText;
    types = document.getElementById("filetypes").innerText.split(", ");
    if (types.includes("JPG")) types.push("JPEG");
    postform.file.addEventListener("change", filePreview);
    fixFileSize();
  }
  
  var del = document.getElementById("delform");
  if (del) del.password.value = weabot.password;

  window.addEventListener("hashchange", checkhighlight);

  if (document.getElementById("catalog")) {
    srt = document.getElementsByClassName("cat_sort");
    for(var i=0;i<srt.length;i++) { srt[i].innerHTML=srt[i].innerText; srt[i].addEventListener("click", function(e) { e.preventDefault(); opcs.sort=this.dataset.sort; catSort(opcs.sort); }); }
    document.getElementById("cat_size").addEventListener("click", function(e) { e.preventDefault(); opcs.big=!opcs.big; catThumbs(opcs.big); });
    document.getElementById("cat_hide").addEventListener("click", function(e) { e.preventDefault(); opcs.teaser=!opcs.teaser; catTeasers(opcs.teaser); });
    document.getElementById("cat_search").addEventListener("keyup", catSearch);
    if (localStorage.hasOwnProperty("catalog")) {
      opcs = JSON.parse(localStorage.getItem("catalog"));
      if(match=/\?sort=([0-9])/.exec(document.location.toString())) opcs.sort=match[1];
      catSort(opcs.sort); catThumbs(opcs.big); catTeasers(opcs.teaser);
    } else {
      opcs = {"sort":1,"big":false,"teaser":true}; localStorage.setItem("catalog", JSON.stringify(opcs));
    }
    var thr = document.getElementsByClassName("thread");
    for(var i=0;i<thr.length;i++) { thr[i].addEventListener("mouseenter", catMenu); thr[i].addEventListener("mouseleave", catMenuClose); }
  }
});
document.addEventListener("click", function(e) {
  var cn = e.target.className;
	if (cn == "num") {
    e.preventDefault();
		postClick(e.target.textContent);
    return;
	}
	if (cn == "tt") {
    e.preventDefault();
		togglethread(e.target);
    return;
	}
	if (cn == "expimg") {
    e.preventDefault();
		expandimg(e.target);
    return;
	}
},false);