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

// Speed of the automatic slideshow
var slideshowSpeed = 20000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = [ 
{"image" : "25.jpg"	}, 
{"image" : "5.jpg"	},
{"image" : "2.jpg"	},
{"image" : "3.jpg"	}, 
{"image" : "16.jpg"	},
{"image" : "19.jpg"	},
{"image" : "21.jpg"	}, 
{"image" : "7.jpg"	},
{"image" : "8.jpg"	},
{"image" : "9.jpg"	}, 
{"image" : "10.jpg"},
{"image" : "11.jpg"},
{"image" : "12.jpg"},
{"image" : "13.jpg"	}, 
{"image" : "14.jpg"	},
{"image" : "15.jpg"	},
{"image" : "6.jpg"	}, 
{"image" : "17.jpg"	},
{"image" : "18.jpg"	},
{"image" : "4.jpg"	}, 
{"image" : "20.jpg"	},
{"image" : "0.jpg"	}, 
{"image" : "22.jpg"},
{"image" : "23.jpg"},
{"image" : "24.jpg"}


];



$(document).ready(function() {
	var interval;
	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
		$('#headerimg' + activeContainer).css({
			"background-image" : 'url(/media/pics/taustad/' + photoObject.image + ')',
			"display" : "block",
			"z-index" : currentZindex
		});
		
	
		// Fade out the current container
		// and display the header text when animation is complete
		$("#headerimg" + currentContainer).fadeOut(function() {setTimeout(function() {animating = false;},  500);});
	};
	

	
	// We should statically set the first image
	navigate("next");
	
	// Start playing the animation
	interval = setInterval(function() {
		navigate("next");
	}, slideshowSpeed);
	
});