/*
* Author:      Marco Kuiper (http://www.marcofolio.net/)
*/
function slider(){
	// Speed of the automatic slideshow
	var slideshowSpeed = 8000;
	
	// Variable to store the images we need to set as background
	// which also includes some text and url's.
	var photos = [ {
			"title" : "Stairs",
			"image" : "slide01.jpg",
			"url" : "",
			"firstline" : "Dent Blanche - Autore: Daniele Bernasconi",
			"secondline" : "vacation?"
		}, {
			"title" : "Office Appartments",
			"image" : "slide02.jpg",
			"url" : "",
			"firstline" : "Nedelgrat - Autore: Giovanni Galli",
			"secondline" : "work?"
		}, {
			"title" : "Mountainbiking",
			"image" : "slide03.jpg",
			"url" : "",
			"firstline" : "Val Verzasca - Autore: Daniele Bernasconi",
			"secondline" : "active"
		}, {
			"title" : "Mountains Landscape",
			"image" : "slide04.jpg",
			"url" : "",
			"firstline" : "Val Pontirone - Autore: Daniele Bernasconi",
			"secondline" : "nature"
		}, {
			"title" : "Bedoleta-Foto D.Bernasconi",
			"image" : "slide05.jpg",
			"url" : "",
			"firstline" : "Piz Terri - Autore: Daniele Bernasconi",
			"secondline" : "food"
		}, {
			"title" : "",
			"image" : "slide06.jpg",
			"url" : "",
			"firstline" : "Autore: Glauco Cugini",
			"secondline" : "food"
		},{
			"title" : "",
			"image" : "slide08.jpg",
			"url" : "",
			"firstline" : "Ghiacciaio del Similaun - Autore: Nicola Marinoni",
			"secondline" : "food"
		}
		
	];
	
	
	
	//$(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(images/home-slider/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
			$("#headerimg" + activeContainer).css({
				"background-image" : "url(images/home-slider/" + photoObject.image + ")",
				"display" : "block",
				"z-index" : currentZindex
			});
			
			// Hide the header text
			$("#headertxt").css({"display" : "none"});
			
			// Set the new header text
			$("#firstline").html(photoObject.firstline);
			$("#secondline")
				.attr("href", photoObject.url)
				.html(photoObject.secondline);
			$("#pictureduri")
				.attr("href", photoObject.url)
				.html(photoObject.title);
			
			
			// Fade out the current container
			// and display the header text when animation is complete
			$("#headerimg" + currentContainer).fadeOut(function() {
				setTimeout(function() {
					$("#headertxt").css({"display" : "block"});
					animating = false;
				}, 500);
			});
		};
		
		var stopAnimation = function() {
			// Change the background image to "play"
			$("#control").css({ "background-image" : "url(images/home-slider/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);
}
//});