/* = CLEAR FIELD
-------------------------------------------------
	clears the value of any inpu field with the
	class name of clearDefault
-------------------------------------------------*/

function clickClear() {
	if(!document.getElementsByTagName) return false;
	
	var inputs = document.getElementsByTagName("INPUT");
	
	for ( var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].className.indexOf("clearDefault") != -1)
		{
			inputs[i].onclick = function() {
				if(this.value == this.defaultValue)
				{
					this.value = "";
				}
				return 0;
			}
			inputs[i].onfocus = function() {
				if(this.value == this.defaultValue)
				{
					this.value = "";
				}
				return 0;
			}
			inputs[i].onblur = function() {
				if(this.value == "")
				{
					this.value = this.defaultValue;
				}
				return 0;
			}
		}
	}
	return 0;
}

/* = FEATURE NEWS AREA
-------------------------------------------------*/

function prepFeaturedNews() {
	if(!document.getElementById || !document.getElementsByTagName) return 0;
	if(!document.getElementById("featured-news-block") 
		|| !document.getElementById("featured-news-list") 
		|| !document.getElementById("featured-news-image")) return 0;
	
	var list = document.getElementById("featured-news-list");
	var imageBlockContainer = document.getElementById("featured-news-image");
	
	var listItem = list.getElementsByTagName("LI");
	
	for( var i = 0; i < listItem.length; i < i++ )
	{
		var link = listItem[i].getElementsByTagName("A")[0];
		if(!link) continue;
		
		listItem[i].onmouseover = function() {
			var link = this.getElementsByTagName("A")[0];
			var href = link.getAttribute("href");
			
			var imageId = href.split("#")[1];

			if(!document.getElementById(imageId)) return 0;
			var imageBlock = document.getElementById(imageId);
			hideAll(imageBlockContainer, "DIV", "photo", "hide");
			for(var j = 0; j < listItem.length; j++)
			{
				listItem[j].className = listItem[j].className.replace(/ ?active ?/g, "");
			}
			imageBlock.className = imageBlock.className.replace(/ ?hide ?/g, "");
			var activateListItem = this;
			if(activateListItem.className) {
				activateListItem.className += " active";
			}
			else {
				activateListItem.className = "active";
			}
			
			return false;
		}
	}
}

/* = HIDE ELEMENTS IN A CONTAINER OF A CERTAIN TYPE, CLASS AND HIDE THEM WITH SPECIFIED CLASS */

function hideAll(container, elementType, elementClass, hideClass) {
	if(!container || !elementType || !elementClass || !hideClass) return 0;
	
	var element = container.getElementsByTagName(elementType);
	
	for(var i = 0; i < element.length; i++)
	{
		if(!element[i].className.match(elementClass)) continue;
		if(element[i].className.match(hideClass)) continue;
		
		if(element[i].className) {
			element[i].className += " hide";
		}
		else {
			element[i].className = "hide";
		}
	}
	return 0;
}

/* = PREP INPUT TYPES
-------------------------------------------------*/

function prepInputs() {

	var inputs = document.getElementsByTagName("INPUT");
	for(var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].getAttribute("type") == "checkbox")
		{
			if(inputs[i].className)
			{
				inputs[i].className += " checkBoxInput";
			}
			else {
				inputs[i].className = "checkBoxInput";
			}
			
		}
		else if(inputs[i].getAttribute("type") == "radio")
		{
			if(inputs[i].className)
			{
				inputs[i].className += " radioInput";
			}
			else {
				inputs[i].className = "radioInput";
			}
		}
		else if (inputs[i].getAttribute("type") == "image")
		{
			if(inputs[i].className)
			{
				inputs[i].className += " submitButton";
			}
			else {
				inputs[i].className = "submitButton";
			}
		}
	}
}

function prepFormReset() {
	var forms = document.getElementsByTagName("FORM");
	for(var i = 0; i < forms.length; i++)
	{
		var links = forms[i].getElementsByTagName("A");
		for(var j = 0; j < links.length; j++)
		{
			
			if(links[j].className.match("reset-link"))
			{
				links[j].parentForm = forms[i];
				links[j].onclick = function() {
					this.parentForm.reset();
					
					return false;
				}
			}
		}
	}
	return 0;
}


/* = PRINT LINKS
-------------------------------------------------
	This function adds the javascript print
	function to the onclick event.  The href of 
	this links should be to a printer friendly page
	if possible
-------------------------------------------------*/

function prepPrintLinks() {
	var link = document.getElementsByTagName("A");
	for(var i = 0; i < link.length; i++)
	{
		if(!link[i].className.match("print-link")) continue;
		
		link[i].onclick = function() {
			print();
			return false;
		}
	}
	return 0;
}

/* = EMAIL A FRIEND LINK
-------------------------------------------------*/

function prepEmailFriend() {
	if(!document.getElementById("action-email") || !document.getElementById("emailFriendForm")) return true;
	if(!document.getElementById("emailHref")) return true;
	var emailLink = document.getElementById("action-email").getElementsByTagName("A")[0];
	var emailForm = document.getElementById("emailFriendForm");
	var hrefArea = document.getElementById("emailHref");

	emailLink.onclick = function() {
		showElement(emailForm);
		return false;
	}
	
	var href = location.href;
	var hrefText = document.createTextNode(href);
	hrefArea.appendChild(hrefText);
	
	var closeLink = emailForm.getElementsByTagName("A");
	for(var i = 0; i < closeLink.length; i++)
	{
		if(!closeLink[i].className.match("close")) continue;
		
		closeLink[i].onclick = function() {
			hideElement(emailForm);
			return false;
		}
	}
}

/* = EXPANDABLE NAVIGATION
-------------------------------------------------*/

function expandableSection(blockId, expElementType, onClickElementType) {
	if(!document.createElement) return false;
	if(!document.getElementById(blockId) || !expElementType) return false;
	
	var container = document.getElementById(blockId);
	var expElement = container.getElementsByTagName(expElementType);
	
	for(var i = 0; i < expElement.length; i++)
	{
		if(!expElement[i].getElementsByTagName("UL").length) continue;
		if(expElement[i].className) {
			expElement[i].className += " expandable";
		}
		else {
			expElement[i].className = "expandable";
		}
		var expLink = expElement[i].getElementsByTagName("A")[0];
		
		var link = document.createElement("A");
		link.setAttribute("href", "#");
		link.setAttribute("title", "Click here to expand the list");
		link.className = "expand-link";
		
		expElement[i].insertBefore(link, expLink);
		
		link.onclick = function() {
			var parentLi = this.parentNode;
			// grab the first list
			var subList = parentLi.getElementsByTagName("UL")[0];
			
			if(subList.className.match("hidden")) {
				showElement(subList);
				if(this.className) {
					this.className += " collapsed";
				}
				else {
					this.className = "collapsed";
				}
			}
			else {
				hideElement(subList)
				this.className = this.className.replace(/ ?collapsed ?/g, "");
			}
			
			return false;
		}
	}
	
	return 0;
}

/* = HIDE ELEMENT
-------------------------------------------------*/

function hideElement(element) {
	if(!element || element.className.match("hidden")) return false;
	
	if(element.className) {
		element.className += " hidden";
	}
	else {
		element.className = "hidden";
	}
	
	return 0;
}

/* = SHOW ELEMENT
-------------------------------------------------*/

function showElement(element) {
	if(!element || !element.className.match("hidden")) return false;
	
	element.className = element.className.replace(/ ?hidden ?/g, "");
	
	return 0;
}

function prepBeBlockSlideShow() {
	var prev = $('be-block-navigation').getElementsByClassName("prev")[0];
	var next = $('be-block-navigation').getElementsByClassName("next")[0];
	
	var curr = 0;
		
	$('be-block-image').setAttribute("src", beSlideShowImages[curr]);
	
	prev.onclick = function() {
		
		if( curr == 0 )
		{
			curr = beSlideShowImages.length - 1;
		}
		else {
			curr -= 1;
		}
		
		$('be-block-image').setAttribute("src", beSlideShowImages[curr]);
		
		return false;
	}
	
	next.onclick = function() {
		if ( curr == beSlideShowImages.length - 1 )
		{
			curr = 0;
		}
		else {
			curr += 1;
		}
		
		$('be-block-image').setAttribute("src", beSlideShowImages[curr]);
		
		return false;
	}
		
	$('be-block-navigation').show();
	
	return 0;
}

/* = CLEAR FIELD
-------------------------------------------------
	clears the value of any inpu field with the
	class name of clearDefault
-------------------------------------------------*/

function clickClear() {
	if(!document.getElementsByTagName) return false;
	
	var inputs = document.getElementsByTagName("INPUT");
	
	for ( var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].className.indexOf("clearDefault") != -1)
		{
			inputs[i].onclick = function() {
				if(this.value == this.defaultValue)
				{
					this.value = "";
				}
				return 0;
			}
			inputs[i].onfocus = function() {
				if(this.value == this.defaultValue)
				{
					this.value = "";
				}
				return 0;
			}
			inputs[i].onblur = function() {
				if(this.value == "")
				{
					this.value = this.defaultValue;
				}
				return 0;
			}
		}
	}
	return 0;
}

/* = CALENDAR SECTION
-----------------------------------------------------------------------------------------*/

/* = ATTACH CALENDAR
-------------------------------------------------*/

function prepAttachCalendar() {

	var inputs = document.getElementsByTagName("INPUT");

	for (var i = 0; i < inputs.length; i++)
	{
		if(!inputs[i].className.match("attach-calendar"))
		{
			continue;
		}
		var span = document.createElement("SPAN");
		span.className = "popup-calendar-container";
		var parent = inputs[i].parentNode;
		var input = parent.removeChild(inputs[i]);
		
		input.onclick = function(e) {
			
			// cancels out event bubbling
			if (!e) var e = window.event;
			e.cancelBubble = true;
			if (e.stopPropagation) e.stopPropagation();
			
			// hide any other open calendars
			hideAllPopups("DIV", "popup-calendar");
			
			// EDIT THIS LINE FOR POPUP CAL AJAX URL
			var url = "/calendar/getCalendar.php";
			var parent = this.parentNode;
			var parentChildSpans = parent.getElementsByTagName("SPAN");
			var popupCalendar = parent.getElementsByTagName("DIV")[0];
			if(popupCalendar)
			{
				var haspopupCal = popupCalendar.className.match("popup-calendar");
				if(haspopupCal)
				{
					$(popupCalendar).show();
					return true;
				}
			}
			
			// if popup Calendar has not been added before
			var now = new Date();
			var month = now.getMonth();
			var postVars = "m="+month;
			var calAjax = new Ajax.Request( url, {
				method: 'post',
				postBody: postVars,
				onComplete: addPopupCalendar(parent, url)
			});
		}
		
		span.appendChild(input);
		parent.appendChild(span);

	}
	
	return 0;
}

/* = ADD POPUP CALENDAR
-------------------------------------------------
	Appends the newly created calendar to the
	containing element and call the function that
	preps the month navigation.
-------------------------------------------------*/

function addPopupCalendar(parent, url) {

	// returns anonymous function and passes parent variable using closure
	return function(transport) {
		var response = transport.responseText;
		var popupCalendar = createPopupCal(response, parent);
	
		var popupCalendarInside = "";
		var calNavigation = "";
		
		var divs = popupCalendar.getElementsByTagName("DIV");
		for (var i = 0; i < divs.length; i++)
		{
			if(divs[i].className.match("popup-calendar-inside")) {
				popupCalendarInside = divs[i];
			}
			else if(divs[i].className.match("calendar-navigation")) {
				calNavigation = divs[i];
			}
		}
		
		// passes prep function down to ajax functions for after calendar is replaced
		prepCalNavLinks(popupCalendarInside, calNavigation, url, function() {
			return prepPopupCalLinks(popupCalendar, parent);
		});
		parent.appendChild(popupCalendar);
	}
	
	return 0;
}

/* CREATE POPUPCAL
-------------------------------------------------
	Creates the wrappers and close link for the
	ajax response (calendar)
	Calls PrepPopupCalLinks to prep calendar links
-------------------------------------------------*/

function createPopupCal(response, parent) {
	
	// create popup calendar container
	var popupCalendar = document.createElement("DIV");
	popupCalendar.className = "popup-calendar";
	
	popupCalendar.onclick = function(e) {
		if (!e) var e = window.event;
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();
		return 0;
	}
	
	// create popup calendar inside wrapper the contents of which get replaced
	// when switching from month to month
	var popupCalendarInside = document.createElement("DIV");
	popupCalendarInside.className = "popup-calendar-inside";
	popupCalendarInside.innerHTML = response;
	popupCalendar.appendChild(popupCalendarInside);
	
	//create close link
	var closeLink = document.createElement("A");
	closeLink.setAttribute("href", "#");
	closeLink.className = "close-link";
	var closeLinkText = document.createTextNode("Close");
	closeLink.appendChild(closeLinkText);
	Event.observe(closeLink, 'click', cancelCloseLink(closeLink));
	
	// add close link
	popupCalendar.appendChild(closeLink);
	
	// add onclick events to calendar links
	prepPopupCalLinks(popupCalendar, parent);
	
	return popupCalendar;
}

/* = CANCEL CLOSE LINK
-------------------------------------------------
	Cancels the close link's default action
-------------------------------------------------*/

function cancelCloseLink(linkElement) {
	return function(e) {
		// have to use $() to extend the element for use with hide
		var linkParent = $(linkElement.parentNode);
		linkParent.hide();
		
		Event.stop(e);
	}
}

/* = PREP POPUP CALENDAR LINKS
-------------------------------------------------
	Preps all of the calendar links and assigns
	them onclick events.
-------------------------------------------------*/

function prepPopupCalLinks(popupCalendar, parent) {
	// set onclick functions for calendar links
	var calTable = popupCalendar.getElementsByTagName("TABLE")[0];
	var calLinks = calTable.getElementsByTagName("A");
	
	for ( var i = 0; i < calLinks.length; i++)
	{
		if(!calLinks[i].getAttribute("href")) return false;
		var href = calLinks[i].getAttribute("href");
		href = href.split("#")[1];
		
		// EDIT THIS IF YOU HAVE A DIFFERENT FORMAT
		var regexp = new RegExp("[0-3][0-9]-[0-1][0-9]-[0-9][0-9][0-9][0-9]");
		var matches = regexp.exec(href);
		
		if(matches)
		{
			Event.observe(calLinks[i], 'click', pickDate(calLinks[i], parent, popupCalendar));
		}
		else {
			Event.observe(calLinks[i], 'click', function(e) {
				Event.stop(e);
			});
		}
	}
	
	return 0;
}

/* = PICK DATE
-------------------------------------------------
	This event fires when a link with a date is
	clicked and puts the link's date into the input
-------------------------------------------------*/

function pickDate(linkElement, parent, popupCalendar) {
	return function(e) {
		var inputField = parent.getElementsByTagName("INPUT")[0];
		var href = linkElement.getAttribute("href");
		var date = href.split("#")[1];
		
		inputField.setAttribute("value", date);
		inputField.value = date;
		
		$(popupCalendar).hide();
		
		Event.stop(e);
	}
}

/* = PREP CALENDAR NAV
-------------------------------------------------
	Find the Navigation links and sets the url
	for the ajax call. Then calls prepCalNavLinks()
-------------------------------------------------*/

function prepCalNav() {
	if(!document.getElementById("calendar-block") || !document.getElementById("calendar-block-inside")) return false;
	var calBlock = document.getElementById("calendar-block");
	var calBlockInside = document.getElementById("calendar-block-inside");
	
	var divs = calBlock.getElementsByTagName("DIV");
	for (var i = 0; i < divs.length; i++)
	{
		if(divs[i].className.match("calendar-navigation")) break;
	}
	
	var calNavigation = divs[i];
	
	// EDIT THIS LINE FOR NON POPUP CALENDAR AJAX CALL
	var url = "/calendar/getCalendar.php";
	
	prepCalNavLinks(calBlockInside, calNavigation, url, null);
	
	return 0;
}

/* = NEXT MONTH
-------------------------------------------------
	Determines next month
-------------------------------------------------*/

function nextMonth(currMonth) {
	if(currMonth == 12) {
		return 1;
	}
	else {
		if(currMonth + 1 == 0) {
			return 1;
		}
		else {
			return currMonth + 1;
		}
	}
}

/* = previous MONTH
-------------------------------------------------
	Determines previous month
-------------------------------------------------*/

function prevMonth(currMonth) {
	if(currMonth == 1) {
		return 12;
	}
	else {
		if (currMonth - 1 == 0) {
			return 12;
		}
		else {
			return currMonth - 1;
		}
	}
}

/* = PREP CALENDAR NAV LINKS
-------------------------------------------------
	Sets the onclick events for the calendar
	navigation links.
-------------------------------------------------*/

function prepCalNavLinks(calBlockInside, calNavigation, url, prepFunction) {
	return; // added PP to stop Javascript errors
	var calNavLinks = calNavigation.getElementsByTagName("A");
	
	for ( var j = 0; j < calNavLinks.length; j++)
	{
		if(calNavLinks[j].className.match("prev"))
		{
			var prevCalNavLink = calNavLinks[j];
		}
		else if (calNavLinks[j].className.match("next"))
		{
			var nextCalNavLink = calNavLinks[j];
		}
	}
	
	if(prevCalNavLink.nodeName == "A" && nextCalNavLink.nodeName == "A")
	{
		// set onclick event
		Event.observe(prevCalNavLink, 'click', prevCalendar(prevCalNavLink, nextCalNavLink, calBlockInside, calNavigation, url, prepFunction));
		
		// set onclick event
		Event.observe(nextCalNavLink, 'click', nextCalendar(prevCalNavLink, nextCalNavLink, calBlockInside, calNavigation, url, prepFunction));
	}
	
	return 0;
}

/* = PREVIOUS CALENDAR
-------------------------------------------------
	Calls the previous calendar ajax and resets
	navigation links.
-------------------------------------------------*/

function prevCalendar(prevCalNavLink, nextCalNavLink, calBlockInside, calNavigation, url, prepFunction) {
	
	return function(e) {
		var href = Number(prevCalNavLink.getAttribute("href").split("#")[1]);
		var newCurrMonth = href;
		href = prevMonth(href);
		prevCalNavLink.setAttribute("href", "#"+href);
		
		var nextHref = Number(nextCalNavLink.getAttribute("href").split("#")[1]);
		nextHref = prevMonth(nextHref);
		nextCalNavLink.setAttribute("href", "#"+nextHref)
		
		// POST STRING
		var postVars = "m="+newCurrMonth;
		
		var prevMonRequest = new Ajax.Request(
			url,
			{
				method: 'post',
				postBody: postVars,
				onComplete: replaceCalendar(calBlockInside, calNavigation, url, prepFunction)
			}
			);
		Event.stop(e)
	}
}

/* = NEXT CALENDAR
-------------------------------------------------
	Calls the next calendar ajax and resets
	navigation links.
-------------------------------------------------*/

function nextCalendar(prevCalNavLink, nextCalNavLink, calBlockInside, calNavigation, url, prepFunction) {
	return function(e) {
		var href = Number(nextCalNavLink.getAttribute("href").split("#")[1]);
		var newCurrMonth = href;
		href = nextMonth(href);
		nextCalNavLink.setAttribute("href", "#"+href);
		
		var prevHref = Number(prevCalNavLink.getAttribute("href").split("#")[1]);
		prevHref = nextMonth(prevHref);
		prevCalNavLink.setAttribute("href", "#"+prevHref);
		
		// POST STRING
		var postVars = "m="+newCurrMonth;
		var prevMonRequest = new Ajax.Request(
			url,
			{
				method: 'post',
				postBody: postVars,
				onComplete: replaceCalendar(calBlockInside, calNavigation, url, prepFunction)
			}
			);
			
		Event.stop(e);
	}
}

/* = REPLACE CALENDAR
-------------------------------------------------
	Replaces the contents of calBlockInside with
	ajax response ( new calendar month)
-------------------------------------------------*/

function replaceCalendar(calBlockInside, calNavigation, url, prepFunction) {
	
	return function(transport) {

		calBlockInside.innerHTML = transport.responseText;
		
		var divs = calBlockInside.getElementsByTagName("DIV");
		for (var i = 0; i < divs.length; i++)
		{
			if(divs[i].className.match("calendar-navigation")) break;
		}

		var calNavigation = divs[i];
		
		prepCalNavLinks(calBlockInside, calNavigation, url, prepFunction);
		
		if(prepFunction) {
			
			prepFunction();
		}
		return false;
	}
}

/* = HIDE ALL POPUPS
-------------------------------------------------
	Hides all open "popups" of element type
	(e.g. "DIV") and element class name.
	(e.g. "popup-calendar")
-------------------------------------------------*/

function hideAllPopups(elementType, elementClass) {
	var elementsToHide = document.getElementsByTagName(elementType);

	for ( var i = 0; i < elementsToHide.length; i++)
	{
		if(!elementsToHide[i].className) continue;
		
		var classNames = elementsToHide[i].className.split(" ");

		for( var j = 0; j < classNames.length; j++) {
			if(classNames[j] == elementClass)
			{
				$(elementsToHide[i]).hide();
			}
		}
		
	}
	return 0;
}


/* = ADD QUOTES FOR IE
-----------------------------------------------------------*/


function addQuotes() {
	var quotes = document.getElementsByTagName("Q");
	for( var i = 0; i < quotes.length; i++)
	{
		var text = quotes[i].innerHTML;
		quotes[i].innerHTML = '"'+text+'"';
	}
	
	return 0;
}



/* Function to replace Flash embed objects with a replacement image. MW 2009/03/03
----------------------------------------------------------------------------------*/

function replaceFlashWithImage() {
    if (DetectFlashVer(8, 0, 0)) {
        //alert ('we have flash');
    } else {
        var replacement = document.getElementById('flash-replacement-image');
        var flash_objects = document.getElementsByTagName('embed');
        if (replacement != null && flash_objects.length > 0)
        {
            for (var i = flash_objects.length -1; i >= 0; i--) //need to work backwards because flash_objects changes
            {
                var new_replacement = replacement.cloneNode(true);
                new_replacement.style.visibility='visible';
                new_replacement.style.display='block';
                flash_objects[i].parentNode.replaceChild(new_replacement, flash_objects[i]);
            }
        }
    }

	//JQuery Auto load media player
	if (($('#flashcontainer').length) || ($("div[id|='imedia']").length)) {
        $.getScript('http://www2.imperial.ac.uk/imedia/js/jwplayer.js', function () {
			$.getScript('http://www2.imperial.ac.uk/imedia/js/imedia.jquery.js');       
        });

	    $("head").append("<link>");
		css = $("head").children(":last");
		css.attr({
			rel: "stylesheet",
			type: "text/css",
			media: "screen",
			href: "http://www2.imperial.ac.uk/imedia/css/player.css"
		});

		if ($.browser == 'msie') {
			$("head").append("<link>");
			css = $("head").children(":last");
			css.attr({
				rel: "stylesheet",
				type: "text/css",
				media: "screen",
				href: "http://www2.imperial.ac.uk/imedia/css/player_ie.css"
			});         
		}
	}
}

/* INITIALIZE ALL FUNCTION AFTER WINDOW ONLOAD
-------------------------------------------------*/

function init() {

	if(!document.getElementById || !document.getElementsByTagName) return 0;
	// prep functions
	prepFeaturedNews();
	clickClear();
	prepPrintLinks();
	expandableSection("section-nav", "LI", "IMG");
	prepEmailFriend();
	prepInputs();
	prepFormReset();
	clickClear();
	prepAttachCalendar();
	prepCalNav();
	replaceFlashWithImage();
	
	// for clearing elements like popups when you click away from them
	document.onclick = function() {
	    hideAllPopups("DIV", "popup-calendar"); 
//		return 0; //DO NOT RETURN 0 - it breaks IE
	}
}

addLoadEvent(init);

/* = ON LOAD
---------------------------------------------------------------
	add the on load events
---------------------------------------------------------------*/
function addLoadEvent(func) {
	var oldOnLoad = window.onload
	if (typeof window.onload != 'function') 
	{
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldOnLoad();
			func();
		}
	}
}

//Jquery opening function
$(function(){	
    //Jquery Search icon on/off - edit
	$('#searchQuery')
		.focus(function(){$('#searchQuery').css('background','#e0eaf2');})
		.blur(function() {
		    ($('#searchQuery').val()) || $('#searchQuery').css('background', '#e0eaf2 url(http://www3.imperial.ac.uk/pls/portallive/docs/1/65329697.GIF) left no-repeat');
			});
		if ($('#searchQuery').val()) {
		    $('#searchQuery').css('background','#e0eaf2');
		}
});

$(document).ready(function() {
	var GLoad,
		objType;

	objType = function (o) {
		if (undefined === o) {
			return "undefined";
		} else if (null === o) {
			return "null";
		} else {
			return {}.toString.call(o).slice(8, -1).toLowerCase();
		}
	}

	// Code copied from http://www.imperial.ac.uk/imedia/plugins/videoloader.js
	GLoad = {
		pluginURL : null,
		LoadFeed : function (f, n, jc, cb) {
			$.getJSON(f+jc+'=?', function (j) {
				objFeeds[n] = j;
				if(cb){
					cb(j);
				}
			});
		},
		Each : function (a, f) {
			for (var i = 0, l = a.length; i < l; i++){
				f(a[i]);
			}
		},
		Script : function(f, c){
			var e = document.createElement((c) ? 'link': 'script'),
				type = (c) ? 'css': 'javascript',
				url = GLoad.pluginURL + f;
			e.type = 'text/' + type;

			if (c) {
				e.rel = 'stylesheet';
				e.href = url + '/' + f + '.css';
			} else {
				e.id = f + '-js';
				e.src = (f.substr(f.length-3,f.length) =='.js') ? url :url + '/' + f + '.js';
			}
			var head = document.getElementsByTagName("head")[0];
			if (e !== undefined) {
				head.appendChild(e);
				return true;
			}	
		},
		LoadPlugin : function(f, p) {
			setTimeout(function() {
				//if the script is in the head : %name%-js
				if (document.getElementById(f + '-js')) {
					//add the feed stuff here	
						this[f](p);
						if(p.feed){
							if(p.feed.length > 1){
								//load all feeds not yet in use 
							} else {
								//only one feed being used.
								//check if a name is set else use the plugin name						
								GLoad.LoadFeed(p.feed[0].url,(p.feed[0].name) ? p.feed[0].name : f,p.feed[0].callback);
							}				
						}
				}
				//else run again
				else GLoad.LoadPlugin(f, p);
			},
			500);
		},
		Load : function(l,t){
			GLoad.pluginURL = document.location.protocol + '//' + ((t) ? 'icwwwd.cc.ic.ac.uk/imedia/plugins/' : 'www.imperial.ac.uk/imedia/plugins/');
			if(objType(l)==='string'){
				GLoad.Script(l);
			} else {
				GLoad.Each(l, function(i) {
					if(GLoad.Script(i.name)) GLoad.LoadPlugin(i.name, i.params);
					if (i.css) GLoad.Script(i.name, true);
					if (i.dependant) GLoad.Script(i.dependant);			
				});
			}	
		}
	};

	GLoad.Load([{
		name: "overlay",
		css: true,
		params: {}
	}]);

    $(".reportOC").click(function() {
        addoverlay.htmlContent('<div class="OChead"><span>Report outdated content</span><a href="#"><img border="0" src="/static/images/occlose.gif" alt="Close" class="OCclose" /></a></div><form method="get" action=""><fieldset><p><br/>Please give a brief description of the problem:</p><label for="Description"></label><textarea name="Description" id ="reportContent" cols="76" rows="7"></textarea></p></fieldset><div id="submitOutdatedContent" class="form-buttons"><input type="image" alt="Submit" src="/static/images/button_submit.gif"></div></form>', 380, 240);

        $("#submitOutdatedContent").click(function() {

            var msg = $("#reportContent").val();
            var url = location.href;
            var dataString = { msg: msg, url: url };

            $.ajax({

                type: "GET",
                url: "http://www2.imperial.ac.uk/imedia/feeds/reportProblemMailer.php",
                data: dataString,
                dataType: "jsonp",
                success: function() { }
            });

            $('#wrap').remove();
            return false;
        });


        $('.OCclose').click(function() {
            $('#wrap').remove();
            return false;
        });

        return false;

    });

});



//truncate strings in News pages
function truncateStrings() {
        var elipseString = "..."; //enter the characters for the "more" indicator here
        var totalMainFeatureLength = 145;
        var remainingChars = 0;

        var contentHead = $("#featured-story-text h2.shorten a").text();
        var contentHeadLength = contentHead.length;

        var contentP = $("#featured-story-text p.shorten").text();
        var contentPLength = contentP.length;


        // Check the  main feature headline

        if (contentHeadLength <= totalMainFeatureLength) {
            remainingChars = totalMainFeatureLength - contentHeadLength;
        } else {
            contentHead = contentHead.substr(0, totalMainFeatureLength - elipseString.length);
            remainingChars = 0;
            contentHead += elipseString;
        }

        // update headline main feature:
        $("#featured-story-text h2.shorten a").text(contentHead);

        // Check the main feature txt

        if (contentPLength > remainingChars) {
            contentP = contentP.substr(0, remainingChars - elipseString.length);
            contentP += elipseString;
        }

        //update P main feature:
        if (contentP == elipseString) {
            contentP = "";  //empty string if content just "..."
        }

        $("#featured-story-text p.shorten").text(contentP);
        


        // Checking the 2 top stories

        var totalStoryFeatureLength = 80;
        remainingChars = 0;

        $("#featured-events-list li").each(function (i) {
            storyHeadTxt = $("h4.shorten a", this).text();
            storyHeadTxtLength = storyHeadTxt.length;
            storyPTxt = $("p.shorten", this).text();
            storyPTxtLength = storyPTxt.length;

            ////////*** Check the 2 stories feature headline
            if (storyHeadTxtLength <= totalStoryFeatureLength) {
                remainingChars = totalStoryFeatureLength - storyHeadTxtLength;
            } else {
                storyHeadTxt = storyHeadTxt.substr(0, storyHeadTxtLength - elipseString.length);
                remainingChars = 0;
                storyHeadTxt += elipseString;
            }

            // update headline
            $("h4.shorten a", this).text(storyHeadTxt);


            /////// adjust story P length
            if (storyPTxtLength > remainingChars) {
                storyPTxt = storyPTxt.substr(0, remainingChars - elipseString.length);
                storyPTxt += elipseString;
            }

            // update text
            if (storyPTxt == elipseString) {
                storyPTxt = ""; //empty string if content just "..."
            }

            $("p.shorten", this).text(storyPTxt);

        });
}