// 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.
var photos = [ 
	{
		"title" : "Imagem corporativa: Logótipo e Criação do website",
		"image" : "webdesign-manutencao-conteudos.jpg",
		"url" : "http://www.igual.pt",
		"firstline" : "Imagem corporativa e Website",
		"secondline" : "Sage Business Partner Professional"
	}, {
		"title" : "Embalagens / Packaging, Flyers, Brochuras",
		"image" : "design-de-embalagens.jpg",
		"url" : "http://www.raulpinadesign.pt/blog_projectos/index.php?/packaging/gelcampo-salteados/",
		"firstline" : "Packaging e Design Editorial",
		"secondline" : "Produtos com impacto junto do consumidor!"
	}, {
		"title" : "Aplicações Mobile: Design de interfaces, Anúncios",
		"image" : "aplicacoes-mobile.jpg",
		"url" : "http://www.cultmycity.com",
		"firstline" : "Multimédia e Marketing online",
		"secondline" : "Fundamental para quem gosta de sair!"
	}, {
		"title" : "Imagem corporativa: Logótipo e Webdesign",
		"image" : "sites.jpg",
		"url" : "http://www.ml-transportesturisticospersonalizados.com",
		"firstline" : "Design gráfico e Webdesign",
		"secondline" : "Transportes de luxo para particulares"
	}, {
		"title" : "Embalagens, eBooks, Newsletters, Layout do website",
		"image" : "embalagens.jpg",
		"url" : "http://www.rcrempresas.com/rcr-software",
		"firstline" : "Packaging, Marketing digital e online",
		"secondline" : "Conhece as fragilidades da sua Gestão?"
	},{
		"title" : "Redesign do site, Página de Facebook e Newsletters",
		"image" : "desenvolvimentodesites.jpg",
		"url" : "http://www.fozbanho.pt",
		"firstline" : "Marketing digital e online",
		"secondline" : "O prazer do banho, o despertar, ..."
	}, {
		"title" : "Imagem institucional, Website, Vitrinismo",
		"image" : "imageminstitucional.jpg",
		"url" : "http://www.bichopapao.com.pt",
		"firstline" : "Design Gráfico e Webdesign",
		"secondline" : "Uma nova vida a um negócio tradicional!"
	}, {
		"title" : "Logótipo, Webdesign, Anúncios web e Página de Facebook",
		"image" : "logotipos.jpg",
		"url" : "http://www.prettyloft.com",
		"firstline" : "Design de Comunicação e Webdesign",
		"secondline" : "Imóveis de sonho no Porto e no Norte de Portugal!"
	}, {
		"title" : "Catálogos, Redesign site e Área privada B2B",
		"image" : "marketingcorporativo.jpg",
		"url" : "http://www.goldentav.pt",
		"firstline" : "Marketing, Webdesign e Publicidade",
		"secondline" : "Vontade de crescer e de ir além fronteiras!"
	}, {
		"title" : "Website com gestor de conteúdos (cms)",
		"image" : "websites.jpg",
		"url" : "http://www.rencad.pt",
		"firstline" : "Desenvolvimento web",
		"secondline" : "Um site de qualidade para quem vai mais longe!"		
	}
];
$(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/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/" + 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/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);
	
});