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

// JavaScript Preload slideshow images
var myimages = new Array();
function preloading(){
	for (x=0; x<preloading.arguments.length; x++){
		myimages[x] = new Image();
		myimages[x].src = preloading.arguments[x];
	}
}
preloading("images/PPGL3838.jpg","images/Killarney-143.jpg","images/090924_5964.jpg","images/GettyImages_91156644.jpg");


// Speed of the automatic slideshow
var slideshowSpeed = 5000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = [ {
		"project" : "Tacoma Convention Center",
		"image" : "PPGL3838.jpg",
		"url" : "",
		"brandLine" : "High Performance Insulated Glass ",
		"locationLine" : "Tacoma Convention Center, Tacoma, WA",
		"glsProduct" : "PPG Solarban 60 on Clear IG Units &amp; IMPRESSIONS Opaci-Coat300&reg;",
		"glzCont" : "Walters & Wolf",
		"photographer" : " "
	},{
		"project" : "Killarney Community Center",
		"image" : "Killarney-143.jpg",
		"url" : "",
		"brandLine" : "IMPACT Decorative by Lami Glass",
		"locationLine" : "Killarney Community Center, Vancouver, BC, Canada",
		"glsProduct" : "Vanceva&reg; Panels",
		"glzCont" : "Action Ostry Architects",
		"photographer" : " "
	}, {
		"project" : "Robson Square",
		"image" : "090924_5964.jpg",
		"url" : "",
		"brandLine" : "IMPACT Decorative by Lami Glass",
		"locationLine" : "Robson Square Square Ice Rink, Vancouver, BC, Canada",
		"glsProduct" : "Pilkington Activ - .090 Interlayer - Pilkington Energy Advantage Low-E",
		"glzCont" : "Glazing Contractor: Superior Glass",
		"photographer" : "Michael Elkan Photography"
	}, {
		"project" : "TOTAL Vision System ",
		"image" : "GettyImages_91156644.jpg",
		"url" : "",
		"brandLine" : "Frameless Commercial Entrance",
		"locationLine" : "Complete with",
		"glsProduct" : "IMPRESSIONS Silk Screened Glass",
		"glzCont" : "and Custom DNA Pattern in Etch Frit",
		"photographer" : "glass"
	}
];



$(document).ready(function() {
	$("#control").hover(function(){
		$(this).toggleClass("hover");
	});
	$("#control").click(function(){
		$(this).toggleClass("active");
	});

	// 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/pause-over.png)" });
		// Change the HTML Title attribute to "pause"
		$(this).each(function(i) {
		this.title = "Pause";
		} );
		
		// 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
		$("#projectName").attr("href", photoObject.url).html(photoObject.project);
		$("#brandCategory").html(photoObject.brandLine);
		$("#location").attr("href", photoObject.url).html(photoObject.locationLine);
		$("#glsProd").html(photoObject.glsProduct);
		$("#glzCont").html(photoObject.glzCont);
		$("#photographer").html(photoObject.photographer);
		
		
		
		// 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() {
		// Clear the interval
		clearInterval(interval);
		// Call to "play" button
		playBtn();

	};
	
	var playBtn = function() {
	// Change the background image to "play"
	$("#control").css({ "background-image" : "url(images/play-hover.png)", "width": "22px", "height" : "22px" });
	// Change the HTML Title attribute to "Play"
	$("#control").each(function(i) {
		this.title = "Play";
	} );	
	};
	
	
	// We should statically set the first image
	navigate("next");
	
	// Start playing the animation
	interval = setInterval(function() {
		navigate("next");
	}, slideshowSpeed);
	
});