/**
*	@author PeanutC
*	@version 0.0.0.2
*/

function installEvent( eventname, callback, owner )
{
	if( typeof( owner ) == "undefined" )owner = window;
	if( owner.addEventListener )owner.addEventListener( eventname, callback, false );
	else if( owner.attachEvent )owner.attachEvent( 'on'+eventname, callback );
}

function onPageLoad( funcref )
{
	installEvent( "load", funcref );
}

function reset( tagname )
{
	var tags = document.getElementsByTagName( tagname );
	for( var x in tags )
	{
		tags[x].outerHTML = tags[x].outerHTML;
	}
}

function resetPlugins()
{
	reset( "embed" );
	reset( "object" );
}

function scaleImg( img, fac )
{
	var w = img.width*fac;
	var h = img.height*fac;
	img.width  = w;
	img.height = h;
}

function scale_iotw(event)
{
	event = event ? event : window.event;
	
	var target = event.currentTarget ? event.currentTarget : event.srcElement;
	
	var im_week = target;

	if( im_week.width  > iotw_maxwidth  )scaleImg( im_week, iotw_maxwidth /im_week.width  );
	if( im_week.height > iotw_maxheight )scaleImg( im_week, iotw_maxheight/im_week.height );
}

function insert_iotw()
{
	var logo_tag = document.getElementById( "logostrip" );
	if( !logo_tag )return;
	
	var wrapper = document.createElement( "div" );
	wrapper.className = "iotw";
	
	var im_week = document.createElement( "img" );
	im_week.src = iotw_image_source;
	im_week.alt = iotw_image_alternate;
	im_week.title = iotw_mouseover;
	im_week.onload = scale_iotw;
	im_week.id = "iotw";
	
	var title = document.createElement("p");
	title.innerHTML = iotw_title;
	var caption = document.createElement("p");
	caption.innerHTML = iotw_caption;
	
	wrapper.appendChild( title );
	wrapper.appendChild( im_week );
	wrapper.appendChild( caption );
	
	logo_tag.appendChild( wrapper );
}

function doIotw()
{
	var nav_strip = document.getElementById( 'navstrip' );
	var nav_tree = nav_strip.getElementsByTagName( 'a' );
	if( nav_tree.length == 1 )insert_iotw();
}

function addButton( 
					nextSiblingName,
					title,
					name,
					accesskey,
					mouseovermessage,
					onclick )
{
	var button = document.createElement( "input" );
	var spacer = document.createTextNode( " " );
	button.setAttribute( "value", title );
	button.setAttribute( "type", "button" );
	button.setAttribute( "name", name );
	button.accessKey = accesskey;
	button.onmouseover = function(){ document.REPLIER.helpbox.value = mouseovermessage; }
	button.onclick = onclick;
	button.className = "codebuttons";
	
	var inputs = document.getElementsByTagName( "input" );
	for( var x in inputs )
	{
		if( inputs[x].className )
		{
			if( inputs[x].className == "codebuttons" )
			{
				if( inputs[x].name == nextSiblingName )
				{
					inputs[x].parentNode.insertBefore( button, inputs[x] );
					inputs[x].parentNode.insertBefore( spacer, inputs[x] );
				}
			}
		}
	}
	
}

function addUTubeVid(id)
{
	var tag =  
	'[doHTML]<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/'+id+'"></param><embed src="http://www.youtube.com/v/'+id+'" type="application/x-shockwave-flash" width="425" height="350"></embed></object>[/doHTML]';
	doInsert( tag, "", false );
}

function addGoogleVid(src)
{
	var tag = '[doHTML]<object width="400" height="350"><param name="movie" value="'+src+'"></param><embed style="width:400px; height:326px;" id="VideoPlayback" type="application/x-shockwave-flash" src="'+src+'"></embed></object>[/doHTML]';
	doInsert( tag, "", false );
}

function onVideoClick()
{
	var address = prompt( "Enter full youtube or google video url:\r\neg: http://www.youtube.com/watch?v=ABCDEFG or\r\nhttp://www.video.google.com/googleplayer.swf?docId=ABCDEF", "" );
	if( !address )return;
	
	if( address.match( "youtube.com" ) )
	{
		addUTubeVid( address.split( '?v=' )[1] );
	}
	else
	if( address.match( "video.google." ) )
	{
		address = address.replace( "videoplay", "googleplayer.swf" );
		addGoogleVid( address );
	}
	else return alert( "unrecognised url type\r\n(you may be able to embed it manually with the [doHTML] tags)" );
}

function videoButton()
{
	addButton( "email",
				video_caption,
				video_name,
				video_access_key,
				video_help_msg,
				onVideoClick );
}

function getClassElements( tagname, classname )
{
	var el = document.getElementsByTagName( tagname );
	var r = Array();
	for( var x in el )
	{
		if( el[x].className == classname )
		{
			r.push( el[x] );
		}
	}
	return r;
}

function doLolCat( sig )
{
	while( sig.childNodes.length )
	{
		sig.removeChild( sig.firstChild );
	}
	var i = document.createElement( "img" );
	i.src = sig_replacement;
	i.alt = "i have a deficient sense of sig height. ARF.";
	sig.appendChild( i );
}

function lolcatSigs()
{
	var sigs = getClassElements( "div", "signature" );
	for( var x in sigs )
	{
		var nl = true;
		var h =0;
		for( var y=0; y< sigs[x].childNodes.length; y++ )
		{
			if( sigs[x].offsetHeight )
			if( sigs[x].offsetHeight > maxSigHeight )
			{
				doLolCat( sigs[x] );
				h = -1;
			}
		}
	}
}

function setCookie(name,value,time)
{
	var second = 1000;
	var minute = second*60;
	var hour = minute*60;
	var day = hour*24;
	
	var exp = '';
	if (time && typeof(time) == "number") 
	{	
		var d = new Date();
		d.setTime(d.getTime()+(time*hour));
		exp = "; expires="+d.toGMTString();
	}
	document.cookie = name+"="+value+exp+"; path=/";
}

function getCookie( name )
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function write_quote(text)
{
	var anch = document.getElementById( anch_name );
	if( !anch )return;
	while( anch.childNodes.length )anch.removeChild( anch.firstChild );
	anch.appendChild( document.createTextNode( text ) );
}

function buildQuoteCookie( quote_array )
{
	var cookie_open = "["+cookieTag+"]";
	var cookie_close = "[/"+cookieTag+"]";
	var tagssize = cookie_open.length+cookie_close.length;
	
	var cookie = '';
	var maxCookie = 4000;
	var result = new Array();
	
	while( quote_array.length )
	{
		var pick = popRandom( quote_array );
		
		if( cookie.length + (pick.length+tagssize) >= maxCookie )break;
			
		result.push( pick );
		cookie+=cookie_open+pick+cookie_close;
			
		if( cookie.length >= maxCookie )break;
	}
	var cookielife = cookie.length ? cookieLifetime : -1;
	setCookie( cookieName, cookie, cookielife );
}

function ajhaxQuoteResult( quote_string )
{
	if( !quote_string.length )return;

	var quote_array = buildQuotes( quote_string, tagname );
	if( !quote_array.length )return;

	write_quote( popRandom( quote_array ) );
	buildQuoteCookie( quote_array );
}

function popRandom( array )
{
	var s = array.length;
	var i = Math.round(Math.random()*(s-1));
	var a = array[i];
	array = array.splice( i, 1 );
	return a;
}

function buildQuotes( quote_string, tag )
{
	var open_tag = '['+tag+']';
	var close_tag = '[/'+tag+']';
	var results = Array();
		var entry='';
		var start =0;
		var end = 0;
		var x=0;
	do
	{
		start = quote_string.indexOf(open_tag)+open_tag.length;
			
		if( start < open_tag.length )return;
		
		end = quote_string.indexOf( close_tag );
		results.push( quote_string.slice( start,end ) );
		
		quote_string = quote_string.slice( end+close_tag.length, quote_string.length);
		
	}while(quote_string.indexOf(open_tag)>=0);
	
	return results;
}

function AJhax( src, onfail, onok )
{	
	http_request = null;
	
	if( window.XMLHttpRequest )
	{
		http_request = new XMLHttpRequest();
	}
	else
	if (window.ActiveXObject)
	{
		http_request = new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	if( !http_request )return onfail("ajax it not working sorry");
	
	http_request.onreadystatechange = function()
   {
     switch( http_request.readyState )
     {
      case 4:
      switch( http_request.status )
      {
        case 200:
		return onok( http_request.responseText );
   
        default:
		return onfail("-");
      }
      break;
     }
	}
	http_request.open( "GET", src, true );
	http_request.send( null );
}

function loadQuote()
{
	write_quote( "" );
	
	var cached = getCookie( cookieName );
	
	if(cached && cached.length)
	{
		var quote_array = buildQuotes( cached, cookieTag );
		if( quote_array.length )
		{
			write_quote( popRandom( quote_array ) );
			buildQuoteCookie( quote_array );
		}
	}
	else
	{
		AJhax( thread_src, write_quote, ajhaxQuoteResult );
	}
}

function installBobby()
{
	var pn = document.getElementById( "userlinks" );
	if( !pn )return;
	
	var dv = document.createElement( "div" );
	var ic = document.createElement( "img" );
	var sp = document.createElement( "span" );
	ic.src = bob_img;
	ic.alt = "TMNT";
	ic.onclick = loadQuote;
	dv.className = "bobbyquote";
	sp.id = anch_name;
	sp.innerHTML = "loading...";
	
	dv.appendChild( ic );
	dv.appendChild( sp );
	
	pn.parentNode.insertBefore(dv, pn);
	loadQuote();
}

function TMNT()
{
	var text = prompt( "OH OK you enter quoted now" );
	if( !text )return;
	var tag = "[doHTML]<span class=\"bobbyquote-post\">"+text+"</span>[/doHTML]";
	doInsert( tag, "", false );
}

function addTMNTButton()
{
	addButton( "QUOTE",
			   tmnt_button_title, 
			   tmnt_button_name, 
			   tmnt_button_access_key, 
			   tmnt_button_help_msg,
			   TMNT
			   );
}

onPageLoad( resetPlugins );
onPageLoad( doIotw );
//onPageLoad( installBobby );
onPageLoad( videoButton );
onPageLoad( lolcatSigs );
onPageLoad( addTMNTButton );