/*
* Author:      Marco Kuiper (http://www.marcofolio.net/)
*/

// Speed of the automatic slideshow
var slideshowSpeed = 6000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
/*
var photos = [ {
		"title" : "Stairs",
		"image" : "vacation.jpg",
		"height" : 434,
		"url" : "http://www.sxc.hu/photo/1271909",
		"firstline" : "Going on",
		"secondline" : "vacation?"
	}, {
		"title" : "Office Appartments",
		"image" : "work.jpg",
		"height" : 434,
		"url" : "http://www.sxc.hu/photo/1265695",
		"showline"   : "false",
		"firstline"  : "",
		"secondline" : ""
	}, {
		"title" : "Mountainbiking",
		"image" : "biking.jpg",
		"height" : 434,
		"url" : "http://www.sxc.hu/photo/1221065",
		"firstline" : "Get out and be",
		"secondline" : "active"
	}, {
		"title" : "Mountains Landscape",
		"image" : "nature.jpg",
		"height" : 434,
		"url" : "http://www.sxc.hu/photo/1271915",
		"firstline" : "Take a fresh breath of",
		"secondline" : "nature"
	}, {
		"title" : "Italian pizza",
		"image" : "food.jpg",
		"height" : 434,
		"url" : "http://www.sxc.hu/photo/1042413",
		"firstline" : "Enjoy some delicious",
		"secondline" : "food"
	}
];
*/
$(document).ready(function() {
		
	var interval;

	startSlideShow = function() {

		$("#slideshow").show();

		// We should statically set the first image
		navigate("next");

		// Start playing the animation
		interval = setInterval(function() {
			navigate("next");
		}, slideshowSpeed);


		// Backwards navigation
		$("#back").click(function() {
			stopAnimation();
			navigate("back");
		});
	
		// Forward navigation
		$("#next").click(function() {
			stopAnimation();
			navigate("next");
		});

		$("#bill").hover(function(){
			stopAnimation();
		}, function() {
			// Show the next image
//			navigate("next");
			// Start playing the animation
			interval = setInterval(function() {
				navigate("next");
			}, slideshowSpeed);
		});
	}	

	var activeContainer = 1;	
	var currentImg = 0;
	var animating = false;
	var navigate = function(direction) {
		// Check if no animation is running. If it is, prevent the action
		if(animating) {
			return;
		}

		if(activeContainer == 2 && photos.length == 1)
			return;
		
		// Check which current image we need to show
		if(direction == "next") {
			currentImg++;
			if(currentImg == photos.length + 1) {
				currentImg = 1;
			}
		} else {
			currentImg--;
			if(currentImg == 0) {
				currentImg = photos.length;
			}
		}
		
		// Check which container we need to use
		var currentContainer = activeContainer;
		if(activeContainer == 1) {
			activeContainer = 2;
		} else {
			activeContainer = 1;
		}
		
		showImage(photos[currentImg - 1], currentContainer, activeContainer);
		
	};
	
	var currentZindex = -1;
	var showImage = function(photoObject, currentContainer, activeContainer) {
		animating = true;

		// Hide the header text
		$("#headertxt").css({"display" : "none"});
		$("#firstline").empty();
		$("#secondline").empty();
		
		// Make sure the new container is always on the background
		currentZindex--;

		$("#bill").css({"height" : photoObject.height});

		$("#firstline").removeClass('firstline');
		$("#secondline").removeClass('secondline');
		
		// Set the background image of the new active container
		$("#headerimg" + activeContainer).css({
			"background-image" : "url(/data/bill/" + photoObject.image + ")",
			"display" : "block",
			"height"  : photoObject.height,
			"z-index" : currentZindex
		});
		
		// Set the new header text
//		alert(photoObject.firstline.length);
		if(photoObject.firstline.length > 0)
			$("#firstline").html(photoObject.firstline).addClass('firstline');
		if(photoObject.secondline.length > 0)
			$("#secondline").attr("href", photoObject.url).html(photoObject.secondline).addClass('secondline');
//		$("#pictureduri").attr("href", photoObject.url).html(photoObject.title);
		
		
		// Fade out the current container
		// and display the header text when animation is complete
		$("#headerimg" + currentContainer).fadeOut(function() {
			setTimeout(function() {
				if(photoObject.showline != 'false')
					$("#headertxt").css({"display" : "block"});
				animating = false;
			}, 200);
		});
	};
	
	var stopAnimation = function() {
		// Change the background image to "play"
//		$("#control").css({ "background-image" : "url(/images/2011/t/btn_play.png)" });
		// Clear the interval
		clearInterval(interval);
	};

});