if(typeof g_ugFunctions != "undefined")
	g_ugFunctions.registerTheme("carousel");
else 
	jQuery(document).ready(function(){g_ugFunctions.registerTheme("carousel")});


/**
 * Grid gallery theme
 */
function UGTheme_carousel(){

	var t = this;
	var g_gallery = new UniteGalleryMain(), g_objGallery, g_objects, g_objWrapper;
	var g_lightbox = new UGLightbox(), g_carousel = new UGCarousel();
	var g_functions = new UGFunctions(), g_objTileDesign = new UGTileDesign();;
	var g_objNavWrapper, g_objButtonLeft, g_objButtonRight, g_objButtonPlay, g_objPreloader;
	var g_apiDefine = new UG_API();
	
	var g_options = {
			theme_gallery_padding: 0,				//the padding of the gallery wrapper
			
			theme_carousel_align: "center",			//the align of the carousel
			theme_carousel_offset: 0,				//the offset of the carousel from the align sides

			theme_enable_navigation: true,
			theme_navigation_position: "bottom",	//top,bottom: the vertical position of the navigation reative to the carousel
			theme_navigation_enable_play: true,		//enable / disable the play button of the navigation
			theme_navigation_align: "center",		//the align of the navigation
			theme_navigation_offset_hor: 0,			//horizontal offset of the navigation
			theme_navigation_margin: 20,			//the space between the carousel and the navigation
			theme_space_between_arrows: 5			//the space between arrows in the navigation
	};
	
	var g_defaults = {
			gallery_width: "100%",
			tile_width: 160,
			tile_height: 160,
			tile_enable_border: true,
			tile_enable_outline: true,
			carousel_vertical_scroll_ondrag: true
	};
	
	
	//temp variables
	var g_temp = {
	};
	
	
	/**
	 * Init the theme
	 */
	function initTheme(gallery, customOptions){
		
		g_gallery = gallery;
		
		//set default options
		g_options = jQuery.extend(g_options, g_defaults);
		
		//set custom options
		g_options = jQuery.extend(g_options, customOptions);
		
		//modifyOptions();
		
		//set gallery options
		g_gallery.setOptions(g_options);
		
		g_gallery.setFreestyleMode();
		
		g_objects = gallery.getObjects();
		
		//get some objects for local use
		g_objGallery = jQuery(gallery);		
		g_objWrapper = g_objects.g_objWrapper;
		
		//init objects
		g_lightbox.init(gallery, g_options);
		
		g_carousel.init(gallery, g_options);
		
		g_objTileDesign = g_carousel.getObjTileDesign();
	}
	
	
	/**
	 * set gallery html elements
	 */
	function setHtml(){
				
		//add html elements
		g_objWrapper.addClass("ug-theme-carousel");
		
		g_carousel.setHtml(g_objWrapper);
		
		if(g_options.theme_enable_navigation == true){
			var htmlAdd = "<div class='ug-tile-navigation-wrapper' style='position:absolute'>";
			htmlAdd += "<div class='ug-button-tile-navigation ug-button-tile-left'></div>";
			
			//put play/pause button
			if(g_options.theme_navigation_enable_play == true)
				htmlAdd += "<div class='ug-button-tile-navigation ug-button-tile-play'></div>";
			
			htmlAdd += "<div class='ug-button-tile-navigation ug-button-tile-right'></div>";
			htmlAdd += "</div>";
			g_objWrapper.append(htmlAdd);
			
			g_objNavWrapper = g_objWrapper.children(".ug-tile-navigation-wrapper");
			
			g_objButtonLeft = g_objNavWrapper.children(".ug-button-tile-left");
			g_objButtonRight = g_objNavWrapper.children(".ug-button-tile-right");
			
			g_objButtonLeft.css("margin-right",g_options.theme_space_between_arrows+"px");
			
			if(g_options.theme_navigation_enable_play == true){			
				g_objButtonPlay = g_objNavWrapper.children(".ug-button-tile-play");
				g_objButtonPlay.css("margin-right",g_options.theme_space_between_arrows+"px");
			}
			
		}
		
		g_lightbox.putHtml();

		//add preloader
		g_objWrapper.append("<div class='ug-tiles-preloader ug-preloader-trans'></div>");
		g_objPreloader = g_objWrapper.children(".ug-tiles-preloader");
		g_objPreloader.fadeTo(0,0);
		
	}

	/**
	 * get gallery width available for the grid
	 */
	function getGalleryWidth(){
		var galleryWidth = g_gallery.getSize().width;
		galleryWidth -= g_options.theme_gallery_padding * 2;
		
		return(galleryWidth);
	}
	
	/**
	 * get estimated height of the carousel and the navigation
	 */
	function getEstimatedHeight(){
		var height = g_carousel.getEstimatedHeight();
		
		if(g_objNavWrapper){
			var navHeight = g_objNavWrapper.height();
			height += navHeight + g_options.theme_navigation_margin;
		}
		
		return(height);
	}
	
	/**
	 * actually run the theme
	 */
	function actualRun(){
		
		//first set the height, maybe scrollbars will appear
		var galleryHeight = getEstimatedHeight();
		g_objWrapper.height(galleryHeight);
		
		var galleryWidth = getGalleryWidth();

		initEvents();
		
		g_carousel.setMaxWidth(galleryWidth);
		g_carousel.run();
		
		g_lightbox.run();
			
		positionElements();
		
	}
	
	
	/**
	 * run the theme
	 */
	function runTheme(){
		
		setHtml();
		
		actualRun();
		
	}
	
	
	/**
	 * position elements
	 */
	function positionElements(){
		
		var carouselElement = g_carousel.getElement();
		var sizeCar = g_functions.getElementSize(carouselElement);

		var navHeight = 0;
		
		if(g_objNavWrapper){
			var sizeNav = g_functions.getElementSize(g_objNavWrapper);
			navHeight = sizeNav.height;
		}
				
		var galleryHeight = sizeCar.height;
		
		if(navHeight > 0)
			galleryHeight += g_options.theme_navigation_margin + navHeight;
		
		//vars for bottom nav position
		var carouselTop = 0;
		
		if(g_objNavWrapper){
			
			var navTop = sizeCar.height + g_options.theme_navigation_margin;
			
			//change vars for top nav position
			if(g_options.theme_navigation_position == "top"){
				
				carouselTop = sizeNav.height + g_options.theme_navigation_margin;
				navTop = 0;
			}
		}
		
		//align the carousel
		g_functions.placeElement(carouselElement, g_options.theme_carousel_align, carouselTop, g_options.theme_carousel_offset, 0);
		var sizeCar = g_functions.getElementSize(carouselElement);
		
		//position buttons
		if(g_objNavWrapper){
			var navX = sizeCar.left + g_functions.getElementRelativePos(g_objNavWrapper, g_options.theme_navigation_align, g_options.theme_navigation_offset_hor, carouselElement);
			g_functions.placeElement(g_objNavWrapper, navX, navTop);
			
		}
		
		g_objWrapper.height(galleryHeight);		//temp height

		//place preloader
		g_functions.placeElement(g_objPreloader, "center", 50);
	
	}
		
	
	/**
	 * on tile click - open lightbox
	 */
	function onTileClick(data, objTile){
		
		objTile = jQuery(objTile);		
		
		var objItem = g_objTileDesign.getItemByTile(objTile);
		var index = objItem.index;		
		
		g_lightbox.open(index);
	}
	
	
	/**
	 * on gallery size change - resize the theme.
	 */
	function onSizeChange(){
		
		var galleryWidth = getGalleryWidth();
		g_carousel.setMaxWidth(galleryWidth);
		g_carousel.run();
			
		positionElements();
	}

	/**
	 * before items request: hide items, show preloader
	 */
	function onBeforeReqestItems(){
		
		g_carousel.stopAutoplay();
		
		g_carousel.getElement().hide();
		
		if(g_objNavWrapper)
			g_objNavWrapper.hide();
		
		//show preloader:
		g_objPreloader.fadeTo(0,1);
	}
	
	
	/**
	 * init api functions
	 */
	function initAPIFunctions(event, api){
		
		api.carouselStartAutoplay = function(){
			g_carousel.startAutoplay();
		}
		
		api.carouselStopAutoplay = function(){
			g_carousel.stopAutoplay();
		}
		
		api.carouselPause = function(){
			g_carousel.pauseAutoplay();
		}
		
		api.carouselUnpause = function(){
			g_carousel.unpauseAutoplay();
		}
		
		api.scrollLeft = function(numTiles){
			g_carousel.scrollLeft(numTiles);
		}	
		
		api.scrollRight = function(numTiles){
			g_carousel.scrollRight(numTiles);
		}
		
		
	}

	
	/**
	 * init buttons functionality and events
	 */
	function initEvents(){
				
		//set navigation buttons events
		if(g_objNavWrapper){
			
			g_carousel.setScrollLeftButton(g_objButtonRight);
			g_carousel.setScrollRightButton(g_objButtonLeft);
			
			if(g_objButtonPlay)
				g_carousel.setPlayPauseButton(g_objButtonPlay);
			
		}
		
		g_objGallery.on(g_gallery.events.SIZE_CHANGE, onSizeChange);
		g_objGallery.on(g_gallery.events.GALLERY_BEFORE_REQUEST_ITEMS, onBeforeReqestItems);
		
		//on click events
		jQuery(g_objTileDesign).on(g_objTileDesign.events.TILE_CLICK, onTileClick);
		
		//init api
		g_objGallery.on(g_apiDefine.events.API_INIT_FUNCTIONS, initAPIFunctions);
	}
	
	
	/**
	 * destroy the carousel events
	 */
	this.destroy = function(){
		
		if(g_objNavWrapper){
			g_functions.destroyButton(g_objButtonRight);
			g_functions.destroyButton(g_objButtonLeft);
			
			if(g_objButtonPlay)
				g_functions.destroyButton(g_objButtonPlay);						
		}
		
		g_objGallery.off(g_gallery.events.SIZE_CHANGE);
		jQuery(g_objTileDesign).off(g_objTileDesign.events.TILE_CLICK);
		g_objGallery.off(g_gallery.events.GALLERY_BEFORE_REQUEST_ITEMS);
		
		g_carousel.destroy();
		g_lightbox.destroy();
		
	}
	
	
	/**
	 * run the theme setting
	 */
	this.run = function(){
		
		runTheme();
	}
	
	
	/**
	 * init 
	 */
	this.init = function(gallery, customOptions){
				
		initTheme(gallery, customOptions);
		
	}
	
	
}