/*
* Author:       Marco Kuiper (http://www.marcofolio.net/)
* Edited by:    KEMBIT (http://www.kembit.nl)
*/

// 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": "Feestende zotten",
		"image": "header.jpg"
    }, {
	    "title": "Feestende zotten 2",
	    "image": "header1.jpg"
	}, {
	    "title": "Feestende zotten 3",
	    "image": "header2.jpg"
	}
];

$(document).ready(function() {
		
	var interval;	
	var activeContainer = 1;
	var currentImg = Math.floor(Math.random() * photos.length);
	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(/_layouts/images/SLV.Website/" + photoObject.image + ")",
			"display" : "block",
			"z-index" : currentZindex
		});
				
		// Fade out the current container
		$("#headerimg" + currentContainer).fadeOut(1000, function() {
			setTimeout(function() {
				animating = false;
			}, 500);
		});
};

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