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

// Speed of the automatic slideshow
var slideshowSpeed = 10000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = [ {
		"title" : "membership services >",
		"image" : "../img/membership.jpg",
		"url" : "membership.php",
		"firstline" : "together we will achieve practice made perfect.",
		"secondline" : "",
		"btnClass" : "membership_Btn"
	}, {
		"title" : "equipment >",
		"image" : "../img/equipment.jpg",
		"url" : "equipment.php",
		"firstline" : "equipped<br/> with advice and practice support.",
		"secondline" : "",
		"btnClass" : "equipment_Btn"
	}, {
		"title" : "accreditation &amp; compliance &gt;",
		"image" : "../img/accreditation.jpg",
		"url" : "accreditation.php",
		"firstline" : "your total <br/> compliance support.",
		"secondline" : "",
		"btnClass" : "accreditations_Btn"
	}, {
		"title" : "materials &amp; supplies &gt;",
		"image" : "../img/materials.jpg",
		"url" : "materials.php",
		"firstline" : "exclusive<br/> offers, products<br/>and supplies.",
		"secondline" : "",
		"btnClass" : "materials_Btn"
	}, {
		"title" : "engineering &amp; support &gt;",
		"image" : "../img/engineering.jpg",
		"url" : "engineering.php",
		"firstline" : "engineering<br/> the perfect<br/>partnership.",
		"secondline" : "",
		"btnClass" : "engineering_Btn"
	}
	, {
		"title" : "dbg academy &gt;",
		"image" : "../img/academy.jpg",
		"url" : "academy.php",
		"firstline" : "essential training<br/>with a little extra<br/>from dbg.",
		"secondline" : "",
		"btnClass" : "academy_Btn"
	}
];



$(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);
		
		$("#btn_uri")
			.attr("href", photoObject.url)
			.html(photoObject.title);
			
		$("#btn_uri").attr('class', photoObject.btnClass);
		
		
		
		
		// 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);
		//});
	//};
	$("#headerimg" + currentContainer).fadeOut(function() {
				$("#headertxt").fadeIn();
				//$("#headertxt").animate({
					//opacity: 1,
					//left: '=50',
					//height: 'toggle'
				  //}, 500, function() {
					// Animation complete.
				  //});
				animating = false;
		});
	};
	
	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);
	
});