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


function resize_bg(s_img){
   		var doc_width = $(window).width();
		var doc_height = $(window).height();
		
		var image_width = s_img.attr('width');
		var image_height = s_img.attr('height');
		var image_ratio = image_width/image_height;      
		var new_width = doc_width;
		var new_height = Math.round(new_width/image_ratio);
        if(new_height<473){
        	new_height = doc_height;
			new_width = Math.round(new_height*image_ratio);
			var width_offset = Math.round((new_width-doc_width)/2);
                    $(s_img).css("left","-"+width_offset+"px");
		}
        $(s_img).width(new_width);
        $(s_img).height(new_height);
}

// 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" : "Img1",
		"image" : "raspberry.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img2",
		"image" : "header-bg2.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img3",
		"image" : "header-bg3.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img4",
		"image" : "header-bg4.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img5",
		"image" : "cherry.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img6",
		"image" : "header-bg6.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img7",
		"image" : "header-bg7.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}, {
		"title" : "Img8",
		"image" : "header-bg8.jpg",
		"url" : "",
		"firstline" : "",
		"secondline" : ""
	}	
];



$(document).ready(function() {
	//Test Code
	$(".thumb-cont a").click( function() {
		var dir = $(this).attr("rel")-1;
		stopAnimation();
		numeric(dir);
	});
	
	//Test Code

	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);
		
	};

//Test Code
	var numeric = function(n) {

		
		var currentContainer = activeContainer;
		if(activeContainer == 1) {
			activeContainer = 2;
		} else {
			activeContainer = 1;
		}
	
		showImage(photos[n], currentContainer, activeContainer);
	};
//Test Code
	
	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
		});
		
		var img_src="images/" + photoObject.image; 
		var image = $('<img class="slideritem" />').attr('src',img_src).css({'position':'absolute'}).load();
		resize_bg(image);
		$("#headerimg" + activeContainer).html(image);
		


		
		// 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);
	*/
	$(window).resize(function(){
		var img=$("#headerimg" + activeContainer).find('img');
		resize_bg(img)
	})

});