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

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

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = jsonImg;

$(document).ready(function() {
	var interval;
	$("ul.nav li a").click(function(){
		var clickedIndex = null;
		setTimeout(function() {
			animating = false;
		}, 500);
		for(var i=0; i<photos.length; i++){
			var index = parseInt($(this).attr('href').replace('#', ''));
			if((photos[i].id) == index){
				clickedIndex = i;
			}
		}
		var currentContainer = activeContainer;
		if(activeContainer == 1) {
			activeContainer = 2;
		} else {
			activeContainer = 1;
		}
		showImage(photos[clickedIndex], currentContainer, activeContainer);
	});
	
	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) {
		if (typeof photoObject == 'undefined') {
			return;
		}
		
		var bannerId = photoObject.id;
		var linkType = photoObject.external;
		var link = photoObject.url;
		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(" + photoObject.image + ")",
			"display" : "block",
			"z-index" : currentZindex
		});
        if(linkType == 0){
         	$('#sliderLink').attr('href', BASE_URL + 'redirect-' + bannerId + '.html');
        }else{
         	$('#sliderLink').attr('href', link);
        }
		$('ul.nav li a').removeClass('active');
		$('ul.nav li a#nav_' + bannerId).addClass('active');
        
		// Fade out the current container
		$("#headerimg" + currentContainer).fadeOut(function() {
			setTimeout(function() {
				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);
});