// Speed of the automatic slideshow
var slideshowSpeed = 10000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = [
	{
		"image" : "slide1.png",
		"title" : "Hot Bikes",
		"descr" : "Main menu and garage"
	},
	{
		"image" : "slide2.png",
		"title" : "Hot Bikes",
		"descr" : "Map screen and achievements"
	},
	{
		"image" : "slide3.png",
		"title" : "Hot Bikes",
		"descr" : "Riding your bike in game"
	}
];

$(document).ready(function() {

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

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

	var interval;
	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;
		}

		// 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;

		// Make sure the new container is always on the background
		currentZindex--;

		// Set the background image of the new active container
		$("#headerimg" + activeContainer).css({
			//"background-image" : "url(images/slideshow/" + photoObject.image + ")",
			"background" : "url('" + basePath + "/images/slideshow/" + photoObject.image + "') 50% 50%",
			"display" : "block",
			"z-index" : currentZindex
		});

		// Hide the header text
		$("#headertxt").css({"display" : "none"});

		// Set the new header text
		//$("#firstline").html(photoObject.title);
		//$("#secondline").html(photoObject.descr);

		// Fade out the current container
		// and display the header text when animation is complete
		$("#headerimg" + currentContainer).fadeOut(function() {
			setTimeout(function() {
				$("#headertxt").fadeIn(function() {
					$("#headertxt").css({"display" : "block"});
				});
				animating = false;
			}, 500);
		});
	};

	var stopAnimation = function() {
		// Clear the interval
		clearInterval(interval);
	};

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

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