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

// 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.

$(document).ready(function() {
	if($('#slider').length > 0 && photos[0]['image'] != '')
	{
		// 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(/images/slideshow/components/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
			$("#sliderimg" + activeContainer).css({
				"background-image" : "url(" + photoObject.image + ")",
				"display" : "block",
				"z-index" : currentZindex
			});
			
			$("#sliderimg" + activeContainer).css({"display" : "none"});
			
			$("#sliderimg" + activeContainer).delay(100).fadeIn(2000);


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

			$("#quicklinks > ul > li > a").css('border-top', '4px solid #000');
			// Fade out the current container
			// and display the slider text when animation is complete
			$("#sliderimg" + currentContainer).fadeOut(100, function() {
				$("#quicklinks > ul > li > a[href="+photoObject.url+"]").css('border-top', '4px solid #e7292c');
				setTimeout(function() {
					$("#slidertxt").css({"display" : "block"});
					animating = false;
				}, 500);
			});
		};

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