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

// 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" : "St Gregory",
		"image" : "stgregory.jpg",
		"url" : "http://silverlining.com.sg/christmas-specials-at-st-gregory#more-2783",
		"firstline" : "Christmas Specials at St. Gregory",
		"secondline" : "Christmas comes early at St. Gregory! Indulge in spa treatments and efficacious exercise regimes that will keep you in shape through the festive season."
	}, {
		"title" : "AMC",
		"image" : "amc.jpg",
		"url" : "http://www.silverlining.com.sg/sldraft/cooking-made-that-simple",
		"firstline" : "Cooking made that simple",
		"secondline" : " More of us would cook at home if cooking were quick & easy. It'd be a bonus if what we cooked tasted great and was healthy too. "
	}, {
		"title" : "Musee d'Orsay Masterpieces at National Museum of Singapore",
		"image" : "night.jpg",
		"url" : "http://silverlining.com.sg/dreams-reality-masterpieces-of-painting-drawing-photography-from-the-musee-d%e2%80%99orsay-paris",
		"firstline" : "Musee d'Orsay Masterpieces at National Museum of Singapore",
		"secondline" : "Masterpieces of Painting, drawing and photography from the Musee d'Orsay, Paris, made available for public viewing at National Museum of Singapore"
	},{
		"title" : "Christmas & New Year 2011: an eat-out guide",
		"image" : "christmas-ham.jpg",
		"url" : "http://silverlining.com.sg/christmas-new-year-2011-an-eat-out-guide",
		"firstline" : "Christmas and New Year 2011: an eat-out guide",
		"secondline" : "Want to beat the kitchen heat? Then skip all the cooking and eat out. Here are some places to go."
	},{
		"title" : "Men Can Cook!",
		"image" : "mencancook.jpg",
		"url" : "http://silverlining.com.sg/category/relish",
		"firstline" : "Special Feature: Men Can Cook",
	    "secondline" : "For men who can cook, bringing home the bacon has taken on a whole new meaning. We celebrate the professionals and the hobbyist cooks. The heat is on!"
	}, {
		"title" : "Silver Belles",
		"image" : "sb.jpg",
		"url" : "http://silverlining.com.sg/silver-belles-event",
		"firstline" : "Silver Belles: Beautiful Bonds, 22 October 2011 ",
		"secondline" : "It was glitz and glam galore at this year's Silver Belles! Here's a recap of Silver Lining's premier beauty and wellness event."
	}
];



$(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(http://www.silverlining.com.sg/wp-content/themes/silverlining/images/slideshow/" + 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);
	
});