var gastrosourceLocalFunctions = function(){
	
	return{
		//this function is production ready
		moveAddFavouritesSuccessMessage : function(){
			//check if the path is like http://www.gastrosource.com/favourites/slides/add/
			if(location.href.include('/favourites/slides/')){
			
				$$('#page_tools .links_message').each(function(el){
					//move this element to be first child of contentholder
					var ul = new Element('ul');
					ul.appendChild(el);
					$('contentholder').insert({top: ul});
				}
				);
			}	
		},
		//the next three are non-production ready functions which are mocking up functionality in the media gallery area
		//among the problems are
		//page refresh in the media gallery causes the zoomed image to load (if present)
		//clicking a link containing tiles.media_gallery_item also causes the zoomed image to load. 
		//This could happen if a user sent the URL of a gallery page to someone else. 
		setUpSimulateImageZoomMediaGallery : function(){
			//this is the link which launches the popup image
			$$('.media_zoom').each(function(el){
				el.stopObserving();
				el.observe('custom:click',prototypeAZFunctions.simpleAjaxUpdater.curry([prototypeAZFunctions.applyEvents, prototypeAZFunctions.zoomedImage]));
			});
			if(location.search.include('tiles.media_gallery_item')){
				//this page has been refreshed, and the image has been changed, so fire the zoom event
				gastrosourceLocalFunctions.simulateImageZoomMediaGallery();
			}	
		},
		simulateImageZoomMediaGallery : function(){
			//assume one per page in the media gallery
			Event.fire($$('.media_zoom')[0],'custom:click');
		},	
		setUpMediaGalleryCallbacks : function(){
	
			$$('#media_gallery_viewer .ajax_tile').each(function(el){
				el.stopObserving();
				el.observe('click',prototypeAZFunctions.ajaxTileUpdater.curry([prototypeAZFunctions.applyEvents, gastrosourceLocalFunctions.setUpSimulateImageZoomMediaGallery, gastrosourceLocalFunctions.simulateImageZoomMediaGallery]));
			});
		}
	};	
}();

//redefine a couple of functions here from the root
prototypeAZFunctions.ajaxTileUpdater = function (callBacks, event){
	//first of all, kill the request
	event.stop();
	//the link which was clicked
	var anchor = event.findElement('a');

	//its querystring
	var qs = anchor.search;
	//as an associative array
	var qsParams = qs.toQueryParams();
	//the desired action
	//link format
	//?itemId=7038166&action=remove&tileRefresh=true&panelItemId=8408399
	var params = {};
	
	params['tileRefresh'] = true;
	if(qsParams.tileDefinition){
		params['tileDefinition'] = qsParams.tileDefinition;
	}else{	
		params['tileDefinition'] = 'tiles.panel.decorator';
	}
	if(qsParams.panelItemId){
		params['panelItemId'] = qsParams.panelItemId;
	}
	if(qsParams.requestItemKey){
		params['requestItemKey'] = qsParams.requestItemKey;
	}else{	
	params['requestItemKey'] = qsParams.itemId;
	}	
	
	//branchItemKey: "${pageHelper.branchItem.itemId}"}
	
	params['ajaxSource'] = true; //to fool app into thinking this is a Spring AJAX request
	//TODO this probably won't work on a branch so work something out here
	params['itemId'] = qsParams.itemId;
	
	//TODO get the other qs params and make sure they are on the request as well. hard-coded for now
	if(qsParams.action){
		params['action'] = qsParams.action;
	}	
	if(qsParams.mediaItem){
		params['mediaItem'] = qsParams.mediaItem;
	}	
	
	//try to get link's parent here? might be easier/more portable
	//target actually needs to be the parent of this panel as it will write the whole of the panel back in.
	//might be better to subclass the updater so it can replace an element rather than just replace its contents
	//this would not work if the parent item contained more than just this panel. I don't think that will happen
	var targetNode;
	if(null != qsParams.panelItemId){
		targetNode = $('panel' + qsParams.panelItemId).parentNode;
	}else if (qsParams.targetNode){
		targetNode = $(qsParams.targetNode);
	}else{
		//TODO make this work properly
		targetNode = $('media_gallery_item_holder');
	}	
	//in the meantime
	
	var targetUrl = "";
	// TODO : fix this is a more generic way.
	if (params['tileDefinition'] == 'tiles.favourites_one_click') {
		targetUrl = "/";
	}
	var updater = new Ajax.Updater(targetNode,targetUrl,{
		method: 'get',
		parameters: params,
		onComplete:	 function(){
			//TODO refactor this
			for(j=0;j<callBacks.length;j++){
				try{
					//attempt to call the function
					callBacks[j].call();
				}catch(e){}
					//
				}
			}
	});
};

prototypeAZFunctions.applyEvents = function(){
	
	//find all elements whose ids begin with ajax_panel and enable Prototype AJAX calls
	$$('a[id^=ajax_panel]').each(function(el){
		el.stopObserving();
		console.log('check this still works for panels');
		el.observe('click',prototypeAZFunctions.ajaxTileUpdater.curry([]));
	});	
	var callBacks = [prototypeAZFunctions.zoomedImage, prototypeAZFunctions.applyEvents];
	
	//find all zoomed media images
	$$('.media_zoom').each(function(el){
		el.stopObserving();
		el.observe('click',prototypeAZFunctions.simpleAjaxUpdater.curry(callBacks));
	});
	$$('.ajax_tile').each(function(el){
		el.stopObserving();
		el.observe('click',prototypeAZFunctions.ajaxTileUpdater.curry([prototypeAZFunctions.applyEvents]));
	});
	$$('.ajax_zoomed_media').each(function(el){
		el.stopObserving();
		el.observe('click',prototypeAZFunctions.imageTransition.curry(callBacks));
	});
	gastrosourceLocalFunctions.setUpMediaGalleryCallbacks();
};

//add the above to the onload call stack
var toCall = [gastrosourceLocalFunctions.moveAddFavouritesSuccessMessage, gastrosourceLocalFunctions.setUpMediaGalleryCallbacks, gastrosourceLocalFunctions.setUpSimulateImageZoomMediaGallery];