/*
* Author:      Marco Kuiper (http://www.marcofolio.net/)
* Modified by: Gabor Balogh
*/

// Speed of the automatic slideshow
var slideshowSpeed = 15000;
var fadeTime = 3000;

$(document).ready(function() {		
	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
		do {
			currentImg = Math.floor(Math.random()*photos.length);
		} while (lastImg == currentImg);
		lastImg = currentImg;


		// Check which container we need to use
		var currentContainer = activeContainer;
		if(activeContainer == 1) {
			activeContainer = 2;
		} else {
			activeContainer = 1;
		}
		
		showImage(photos[currentImg], currentContainer, activeContainer);
		
	};
	
	var showImage = function(photoObject, currentContainer, activeContainer) {
		animating = true;
		
		// Set the background image of the new active container
		$("#headerimg1").css({
			"background-image" : "url(" + photoObject.image + ")",
			"display" : "block"
		});
		
		// Fade out the current container
		// and display the header text when animation is complete
		$("#headerimg2").fadeOut(fadeTime, function() {
			setTimeout(function() {
				$("#headerimg2").css({
					"background-image" : "url(" + photoObject.image + ")",
					"display" : "block"
				});
				animating = false;
			}, 500);
		});
	};
	
	// We should statically set the first image
	//navigate("next");
	
	// Start playing the animation
	interval = setInterval(function() {
		navigate("next");
	}, slideshowSpeed);	
});