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

// Speed of the automatic slideshow
var slideshowSpeed = 8000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = [
			  {
		"title" : "Sully",
		"image" : "main-image-1.jpg",
		"url" : "http://www.shieldengineering.com/services/forensic-failure-investigation-services/fire-cause--origin",
		"firstline" : "Meet Sully.",
		"secondline" : "Our newest team member can sniff out environmental hazards.<br><br>Get to know Sully."
	},
			 {
		"title" : "Spill Management",
		"image" : "main-image-3.jpg",
		"url" : "/spill-management",
		"firstline" : "Spill Management",
		"secondline" : "Our emergency response managers are available 24/7.<br><br>Call 1-800-948-6044"
	},	
	{
		"title" : "Scratching",
		"image" : "main-image-2.jpg",
		"url" : "/services",
		"firstline" : "Stop scratching.",
		"secondline" : "We provide high-quality engineering and environmental solutions regardless of the project size. Get info."
	/* },
	{
		"title" : "Mountainbiking",
		"image" : "biking.jpg",
		"url" : "http://www.sxc.hu/photo/1221065",
		"firstline" : "Get out and be",
		"secondline" : "active"
	},
	{
		"title" : "Italian pizza",
	"image" : "food.jpg",
	"url" : "http://www.sxc.hu/photo/1042413",
	"firstline" : "Enjoy some delicious",
	"secondline" : "food" */
}
];

$j(document).ready(function() {

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

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

	var interval;
	$j("#control").toggle(function(){
		stopAnimation();
	}, function() {
		// Change the background image to "pause"
		$j(this).css({ "background-image" : "url(/site/theme/images/btn_pause.png)" });

		// 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;
		}

		// 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
		$j("#headerimg" + activeContainer).css({
			"background-image" : "url(/site/theme/resources/bgs/" + photoObject.image + ")",
			"display" : "block",
			"z-index" : currentZindex
		});

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

		// Set the new header text
		$j("#firstline").html(photoObject.firstline);
		$j("#secondline")
			.attr("href", photoObject.url)
			.html(photoObject.secondline);
		$j("#pictureduri")
			.attr("href", photoObject.url)
			.html(photoObject.title);

		// Fade out the current container
		// and display the header text when animation is complete
		$j("#headerimg" + currentContainer).fadeOut(function() {
			setTimeout(function() {
				$j("#headertxt").css({"display" : "block"});
				animating = false;
			}, 800);
		});
	};

	var stopAnimation = function() {
		// Change the background image to "play"
		$j("#control").css({ "background-image" : "url(/site/theme/images/btn_play.png)" });

		// Clear the interval
		clearInterval(interval);
	};

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

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