//See which course page we are on
urlquery=location.href.split("?/");
urlterms=urlquery[1].split("/") ;
var dir = urlterms[0];
var course = urlterms[1];

//Maps the course name to the Tumblr name
var tumblrName;
if (dir == "news") {
	tumblrName = "firstyeardesign";
} 
if (course == "dsdn141") 
	{tumblrName = "experimentingwithmaterials";}
else {
	tumblrName = course;
	
	//switch (course)
//	{
//		case "dsdn101":
//			tumblrName = "dsdn101";
//			break;
//		case "dsdn104":
//			tumblrName = "dsdn104";
//			break;
//		case "dsdn111":
//			tumblrName = "dsdn111";
//			break;
//		case "dsdn112":
//			tumblrName = "dsdn112";
//			break;
//		case "dsdn141":
//			tumblrName = "dsdn141";
//			break;
//		case "dsdn142":
//			tumblrName = "dsdn142";
//			break;
//		case "dsdn144":
//			tumblrName = "dsdn144";
//			break;
//		case "dsdn171":
//			tumblrName = "dsdn171";
//			break;	
//	}
}

//Page tracking (which post to start at)
var firstPost = 0;

// User settings
var settings = {
	userName : tumblrName, // Your Tumblr user name
	itemsToShow : 10, // Number of Tumblr posts to retrieve
	itemToAddBadgeTo : "tumblr-badge", // Id of HTML element to put badge code into
	imageSize : 500, // Values can be 75, 100, 250, 400 or 500
	shortPublishDate : true, // Whether the publishing date should be cut shorter
	timeToWait : 2000 // Milliseconds, 1000 = 1 second
};

//Yucky global, need for now
var badgeContainer = document.getElementById(settings.itemToAddBadgeTo);

function listItems(json) {
	var posts = json.posts,
		list = document.createElement("ul"), 
		post, 
		listItem, 
		text, 
		link, 
		img, 
		conversation, 
		postLink;
	list.className = "tumblr";
	for (var i=0, il=posts.length; i<il; i=i+1) {
		post = posts[i];

		// Only get content for text, photo, video, audio, quote and link posts
		if (/regular|photo|quote|link|video|audio|conversation/.test(post.type)) {
			listItem = document.createElement("li");
			text = post["regular-body"] || post["photo-caption"] || post["quote-source"] || post["link-text"] || post["video-caption"] || post["audio-caption"] || post["link-url"] || "";
			
			// Create a link to Tumblr post
			postLink = document.createElement("a");
			postLink.className = "tumblr-post-date";
			postLink.href = post.url;
			postLink.setAttribute('target', '_blank');
			postLink.innerHTML = (settings.shortPublishDate)? post["date"].replace(/(^\w{3},\s)|(:\d{2}$)/g, "") : post["date"];
			listItem.appendChild(postLink);
			
			if (post.type === "regular") {
				text = "<h2>" + post["regular-title"]+ "</h2><br/>" + text;
			}
			else if (post.type === "photo") {
				link = document.createElement("a");
				link.href = post.url;
				link.setAttribute('target', '_blank');
				img = document.createElement("img");
				// To avoid a creeping page
				img.width = settings.imageSize;
				img.src = post["photo-url-" + settings.imageSize];
				link.appendChild(img);
				listItem.appendChild(link);
				text = "<em>" + text + "</em>";
			}
			else if (post.type === "quote") {
				text = post["quote-text"] + "<em>" + text + "</em>";
			}
			else if (post.type === "link") {
				text = '<a href="' + post["link-url"] + ' target="_blank"">' + text + '</a>';
			}
			else if (post.type === "video") {
				text = post["video-player"] + "<br/><br/>" + text;
			}	
			else if (post.type === "audio") {
				text = post["audio-player"] + "<br/><br/>" + text;
			}	
			else if (post.type === "conversation") {
				conversation = post["conversation-lines"];
				for (var j=0, jl=conversation.length; j<jl; j=j+1) {
					text += conversation[j].label + " " + conversation[j].phrase + ((j === (jl -1))? "" : "<br>");
				}
			}
			listItem.innerHTML += text;

			// Apply list item to list
			list.appendChild(listItem);
		}
	}
	
	// Apply list to container element
	badgeContainer.innerHTML = "";
	badgeContainer.appendChild(list);
	
	//Make page nav bar elements
	pageNav = document.createElement("div");
	pageNav.id = "page-nav";
	prev = document.createElement("a");
	prev.onclick = function() { decrementPage(); }
	prev.innerHTML = "Previous Page";
	next = document.createElement("a");
	next.onclick = function() { incrementPage(); }
	next.innerHTML = "Next Page";
	navLine = document.createElement("span");
	navLine.id = "page-nav-line";
	navLine.innerHTML = "&nbsp;|&nbsp;";
	
	//Decide page nav bar properties (are we on the first or last page?)
	//TO DO: what if the last page fits all remaining posts on evenly?
	if (firstPost == 0) {
		prev.className = "dead";
		prev.onclick = "";
	} else {
		prev.className = "alive";}
	if (settings.itemsToShow > posts.length + 1) {
		next.className = "dead";
		next.onclick = "";
	} else {
		next.className = "alive"; }		
	
	//Assemble and add page nav bar
	pageNav.appendChild(prev);
	pageNav.appendChild(navLine);
	pageNav.appendChild(next);
	badgeContainer.appendChild(pageNav);
};

// tumblrBadge by Robert Nyman, http://www.robertnyman.com/, http://code.google.com/p/tumblrbadge/
function tumblrBadge() {
	
	// Badge functionality
	var head = document.getElementsByTagName("head")[0];
	if (head && badgeContainer) {
		var badgeJSON = document.createElement("script");
		badgeJSON.type = "text/javascript";
		badgeJSON.src = "http://" + settings.userName + ".tumblr.com/api/read/json?callback=listItems&num=" + settings.itemsToShow + "&start=" + firstPost;
		head.appendChild(badgeJSON);
		
		var wait = setTimeout(function () {
			badgeJSON.onload = null;
			badgeJSON.parentNode.removeChild(badgeJSON);
			badgeJSON = null;
		}, settings.timeToWait);
	
	}
};

function incrementPage() {
	firstPost += settings.itemsToShow;
	tumblrBadge();
	window.scrollTo(0,0);
}

function decrementPage() {
	firstPost -= settings.itemsToShow;
	firstPost = Math.max(firstPost, 0);	//redundant checking if nav links check a similar thing further up
	tumblrBadge();
	window.scrollTo(0,0);
}

//Now actually use all the above functions
tumblrBadge();