var dname = "default";

dname = getXMLFileName();

xmlDoc=loadXMLDoc(dname); 
var titles= new Array();
var allImages= new Array();
var urls= new Array();
var firstlines= new Array();
var secondlines= new Array();

n=xmlDoc.getElementsByTagName("title");
var i=0;
for (i=0; i<n.length; i++) {
      titles[i] = xmlDoc.getElementsByTagName("title")[i].childNodes[0].nodeValue;
      allImages[i] = xmlDoc.getElementsByTagName("image")[i].childNodes[0].nodeValue;firstlines[i] = xmlDoc.getElementsByTagName("firstline")[i].childNodes[0].nodeValue;
      urls[i] = xmlDoc.getElementsByTagName("url")[i].childNodes[0].nodeValue;
      firstlines[i] = xmlDoc.getElementsByTagName("firstline")[i].childNodes[0].nodeValue;
      secondlines[i] = xmlDoc.getElementsByTagName("secondline")[i].childNodes[0].nodeValue;
  }
  
// Speed of the automatic slideshow
var slideshowSpeed = 6000;
  

$(document).ready(function() {
		
	// Backwards navigation
	$("#back").click(function() {
		stopAnimation();
		navigate("back");
	});
	
	// Forward navigation
	$("#next").click(function() {
		stopAnimation();
		navigate("next");
	});
	
	var interval;
	$("#control").toggle(function(){
		stopAnimation();
	}, function() {
		// Change the background image to "pause"
		$(this).css({ "background-image" : "url(/storage/media/images/websiteelements/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 == allImages.length + 1) {
				currentImg = 1;
			}
		} else {
			currentImg--;
			if(currentImg == 0) {
				currentImg = allImages.length;
			}
		}
		
		// Check which container we need to use
		var currentContainer = activeContainer;
		if(activeContainer == 1) {
			activeContainer = 2;
		} else {
			activeContainer = 1;
		}
		
		showImage(currentImg - 1, currentContainer, activeContainer);
		
	};
	
	var currentZindex = -2;
	var activeZindex = -3;
	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(/storage/media/images/slideshow/" + allImages[photoObject] + ")",
			"display" : "block",
			"z-index" : activeZindex
		});
		
		// Hide the header text
		//$("#headertxt").css({"display" : "none"});
    $("#headertxt").fadeOut(function() {
			setTimeout(function() {
				$("#firstline").html(firstlines[photoObject]);
		    $("#secondline")
			    .attr("href", urls[photoObject])
			    .html(secondlines[photoObject]);
		    $("#pictureduri")
			    .attr("href", urls[photoObject])
			    .html(titles[photoObject]);
			}, 1000);
		});    

		
		// Fade out the current container
		// and display the header text when animation is complete
		$("#headerimg" + currentContainer).fadeOut(function() {
			setTimeout(function() {
				$("#headertxt").fadeIn();
				animating = false;
				// Move Zindex of active container
		    $("#headerimg" + activeContainer).css({
	    		"background-image" : "url(/storage/media/images/slideshow/" + allImages[photoObject] + ")",
		    	"display" : "block",
			    "z-index" : currentZindex
		});
			}, 1000);
		});
		

	};

	
	var stopAnimation = function() {
		// Change the background image to "play"
		$("#control").css({ "background-image" : "url(/storage/media/images/websiteelements/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);
	
});