var doc = document;
var postByNum = [];
var ajaxPosts = {};
var refArr = [];

function $X(path, root) {
	return doc.evaluate(path, root || doc, null, 6, null);
}
function $x(path, root) {
	return doc.evaluate(path, root || doc, null, 8, null).singleNodeValue;
}
function $del(el) {
	if(el) el.parentNode.removeChild(el);
}
function $each(list, fn) {
	if(!list) return;
	var i = list.snapshotLength;
	if(i > 0) while(i--) fn(list.snapshotItem(i), i);
}

function AJAX(b, id, fn) {
	var xhr = new XMLHttpRequest();
	xhr.onreadystatechange = function() {
		if(xhr.readyState != 4) return;
		if(xhr.status == 200) {
			var x = xhr.responseText;
			var threads = x.substring(x.search(/<form[^>]+del/) + x.match(/<form[^>]+del[^>]+>/).toString().length, x.indexOf('userdelete">') - 13).split(/<br clear="left"[\s\/>]*<h[r\s\/]*>/i);
			for(var i = 0, tLen = threads.length - 1; i < tLen; i++) {
				var tNum = threads[i].match(/<input[^>]+checkbox[^>]+>/i)[0].match(/(?:")(\d+)(?:")/)[1];
				var posts = threads[i].split(/<table[^>]*>/);
				ajaxPosts[tNum] = {keys: []};
				for(var j = 0, pLen = posts.length; j < pLen; j++) {
					var x = posts[j];
					var pNum = x.match(/<input[^>]+checkbox[^>]+>/i)[0].match(/(?:")(\d+)(?:")/)[1];
					ajaxPosts[tNum].keys.push(pNum);
					ajaxPosts[tNum][pNum] = x.substring((!/<\/td/.test(x) && /filesize">/.test(x)) ? x.indexOf('filesize">') - 13 : x.indexOf('<label'), /<\/td/.test(x) ? x.lastIndexOf('</td') : (/omittedposts">/.test(x) ? x.lastIndexOf('</span') + 7 : x.lastIndexOf('</blockquote') + 13));
					x = ajaxPosts[tNum][pNum].substr(ajaxPosts[tNum][pNum].indexOf('<blockquote>') + 12).match(/&gt;&gt;\d+/g);
					if(x) for(var r = 0; rLen = x.length, r < rLen; r++)
						getRefMap(x[r], pNum, x[r].replace(/&gt;&gt;/g, ''));
				}
			}
			fn();
		} else fn('HTTP ' + xhr.status + ' ' + xhr.statusText);
	};
	xhr.open('GET', '/' + b + '/res/' + id + '.html', true);
	xhr.send(false);
}

function delPostPreview(e) {
	var el = $x('ancestor-or-self::*[starts-with(@id,"pstprev")]', e.relatedTarget);
	if(!el) $each($X('.//div[starts-with(@id,"pstprev")]'), function(clone) {$del(clone)});
	else while(el.nextSibling) $del(el.nextSibling);
}

function showPostPreview(e) {
	var tNum = this.pathname.substring(this.pathname.lastIndexOf('/')).match(/\d+/);
    var pNum = this.hash.match(/\d+/) || tNum;
	var brd = this.pathname.match(/[^\/]+/);
	var x = e.clientX + (doc.documentElement.scrollLeft || doc.body.scrollLeft) - doc.documentElement.clientLeft + 1;
	var y = e.clientY + (doc.documentElement.scrollTop || doc.body.scrollTop) - doc.documentElement.clientTop;
	var cln = doc.createElement('div');
	cln.id = 'pstprev_' + pNum;
	cln.className = 'reply';
	cln.style.cssText = 'position:absolute; z-index:950; border:solid 1px #575763; top:' + y + 'px;' +
		(x < doc.body.clientWidth/2 ? 'left:' + x + 'px' : 'right:' + parseInt(doc.body.clientWidth - x + 1) + 'px');
	cln.addEventListener('mouseout', delPostPreview, false);
	var aj = ajaxPosts[tNum];
	var functor = function(cln, html) {
		cln.innerHTML = html;
		doRefPreview(cln);
		if(!$x('.//small', cln) && ajaxPosts[tNum] && ajaxPosts[tNum][pNum] && refArr[pNum])
			showRefMap(cln, pNum, tNum, brd);
	};
	cln.innerHTML = 'Загрузка...';
	if(postByNum[pNum]) functor(cln, postByNum[pNum].innerHTML);
	else {if(aj && aj[pNum]) functor(cln, aj[pNum]);
	else AJAX(brd, tNum, function(err) {functor(cln, err || ajaxPosts[tNum][pNum] || 'Пост не найден')})}
	$del(doc.getElementById(cln.id));
	$x('.//form[@id="delform"]').appendChild(cln);
}

function doRefPreview(node) {
	$each($X('.//a[starts-with(text(),">>")]', node || doc), function(link) {
		link.addEventListener('mouseover', showPostPreview, false);
		link.addEventListener('mouseout', delPostPreview, false);
	});
}

function getRefMap(post, pNum, rNum) {
	if(!refArr[rNum]) refArr[rNum] = pNum;
	else if(refArr[rNum].indexOf(pNum) == -1) refArr[rNum] = pNum + ', ' + refArr[rNum];
}

function showRefMap(post, pNum, tNum, brd) {
	var ref = refArr[pNum].toString().replace(/(\d+)/g, 
	'<a href="' + (tNum ? '/' + brd + '/res/' + tNum + '.html#$1' : '#$1') + '" onclick="highlight($1)">&gt;&gt;$1</a>');
	var map = doc.createElement('small');
	map.id = 'rfmap_' + pNum;
	map.innerHTML = '<br><i class="abbrev">&nbsp;Ответы: ' + ref + '</i><br>';
	doRefPreview(map);
	if(post) post.appendChild(map);
	else {
		var el = $x('.//a[@name="' + pNum + '"]');
		while(el.tagName != 'BLOCKQUOTE') el = el.nextSibling;
		el.parentNode.insertBefore(map, el.nextSibling);
	}
}

function doRefMap() {
	$each($X('.//a[starts-with(text(),">>")]'), function(link) {
		if(!/\//.test(link.textContent)) {
			var rNum = link.hash.match(/\d+/);
			var post = $x('./ancestor::td', link);
			if((postByNum[rNum] || $x('.//a[@name="' + rNum + '"]')) && post)
				getRefMap(post, post.id.match(/\d+/), rNum);
		}
	});
	for(var rNum in refArr) showRefMap(postByNum[rNum], rNum)
}


function expand(num,src,thumb_src,n_w,n_h,o_w,o_h) {
	
	var a = document.getElementById("img_"+num);
	var image = a.childNodes[1];

	if (image.src.indexOf('thumb') != -1) {
		var maxwidth = 0.8*document.body.clientWidth;
		if (n_w>maxwidth){
			image.width = maxwidth;
			image.height = n_h*maxwidth/n_w;
		} else {
			image.width = n_w;
			image.height = n_h;
		}
	image.src = src;
	} else {
	image.width = o_w;
	image.height = o_h;
	image.src = thumb_src;
	}
}

function get_cookie(name)
{
	with(document.cookie)
	{
		var regexp=new RegExp("(^|;\\s+)"+name+"=(.*?)(;|$)");
		var hit=regexp.exec(document.cookie);
		if(hit&&hit.length>2) return unescape(hit[2]);
		else return '';
	}
};

function set_cookie(name,value,days)
{
	if(days)
	{
		var date=new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires="; expires="+date.toGMTString();
	}
	else expires="";
	document.cookie=name+"="+value+expires+"; path=/";
}

function get_password(name)
{
	var pass=get_cookie(name);
	if(pass) return pass;

	var chars="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
	var pass='';

	for(var i=0;i<8;i++)
	{
		var rnd=Math.floor(Math.random()*chars.length);
		pass+=chars.substring(rnd,rnd+1);
	}
	set_cookie('password', pass, 365)
	return(pass);
}

function update_captcha(e)
{
    e.src = e.src.replace(/captcha/, "/captcha/");// + Math.floor(Math.random() * 1000).toString());
}

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();
        }
}

function highlight(post)
{
	var cells=document.getElementsByTagName("td");
	for(var i=0;i<cells.length;i++) if(cells[i].className=="highlight") cells[i].className="reply";

	var reply=document.getElementById("reply"+post);
	if(reply)
	{
		reply.className="highlight";
/*		var match=/^([^#]*)/.exec(document.location.toString());
		document.location=match[1]+"#"+post;*/
		return false;
	}

	return true;
}

function set_stylesheet_frame(styletitle,framename)
{
	set_stylesheet(styletitle);
	var list = get_frame_by_name(framename);
	if(list) set_stylesheet(styletitle,list);
}

function set_stylesheet(styletitle,target)
{
	set_cookie("wakabastyle",styletitle,365);

	var links = target ? target.document.getElementsByTagName("link") : document.getElementsByTagName("link");
	var found=false;
	for(var i=0;i<links.length;i++)
	{
		var rel=links[i].getAttribute("rel");
		var title=links[i].getAttribute("title");
		if(rel.indexOf("style")!=-1&&title)
		{
			links[i].disabled=true; // IE needs this to work. IE needs to die.
			if(styletitle==title) { links[i].disabled=false; found=true; }
		}
	}
	if(!found)
	{
		if(target) set_preferred_stylesheet(target);
		else set_preferred_stylesheet();
	}
}

function set_preferred_stylesheet(target)
{
	var links = target ? target.document.getElementsByTagName("link") : document.getElementsByTagName("link");
	for(var i=0;i<links.length;i++)
	{
		var rel=links[i].getAttribute("rel");
		var title=links[i].getAttribute("title");
		if(rel.indexOf("style")!=-1&&title) links[i].disabled=(rel.indexOf("alt")!=-1);
	}
}

function get_active_stylesheet()
{
	var links=document.getElementsByTagName("link");
	for(var i=0;i<links.length;i++)
	{
		var rel=links[i].getAttribute("rel");
		var title=links[i].getAttribute("title");
		if(rel.indexOf("style")!=-1&&title&&!links[i].disabled) return title;
	}
	return null;
}

function get_preferred_stylesheet()
{
	var links=document.getElementsByTagName("link");
	for(var i=0;i<links.length;i++)
	{
		var rel=links[i].getAttribute("rel");
		var title=links[i].getAttribute("title");
		if(rel.indexOf("style")!=-1&&rel.indexOf("alt")==-1&&title) return title;
	}
	return null;
}

function get_frame_by_name(name)
{
	var frames = window.parent.frames;
	for(i = 0; i < frames.length; i++)
	{
		if(name == frames[i].name) { return(frames[i]); }
	}
}

function set_inputs(name) {
	var form = document.forms[name];
	if(!form.email.value) form.email.value=get_cookie("email"); 
	if(!form.password.value) form.password.value=get_password("password");
} 
function set_delpass(name) { var form = document.forms[name]; form.password.value=get_cookie("password"); }

window.onunload=function(e)
{
	if(style_cookie)
	{
		var title=get_active_stylesheet();
		set_cookie(style_cookie,title,365);
	}
}

window.onload=function(e)
{
	var match;

	if(match=/#i([0-9]+)/.exec(document.location.toString()))
	if(!document.forms.postform.message.value)
	insert(">>"+match[1]);

	if(match=/#([0-9]+)/.exec(document.location.toString()))
	highlight(match[1]);

	if(match=/res/.exec(document.location.toString())) {
	$each($X('.//td[@class="reply"]'), function(post) {postByNum[post.id.match(/\d+/)] = post});
	doRefPreview();
	doRefMap();
	}
}

if(style_cookie)
{
	var cookie=get_cookie(style_cookie);
	var title=cookie?cookie:get_preferred_stylesheet();
	set_stylesheet(title);
}