var Connect = require('connect');
var http = require('http');
var walk = require('walk');
var fs = require('fs');
var url = require('url');
var path = require('path');
var files = [];
var walker = walk.walk('./slideshows',{ followLinks: false });

walker.on("directories", function (root, dirAr, next) {
	var lastDir = path.join(__dirname, root).split('/');
	if((lastDir.length - __dirname.split('/').length) < 2) {
		dirAr.forEach(function(dir) {
			files[dir.name] = [];
		});
	}
	next();
}).on("file", function (root, fileStats, next) {

	if(fileStats.name == "desc") { 
		next();
	}
	else if(fileStats.name == "template.html") {
		var lastDir = root.split('/');
		files[lastDir[lastDir.length - 1]].push({ template: fileStats.name});
		next();
	} else {
		var lastDir = path.join(root).split('/');
		if(files.hasOwnProperty(lastDir[lastDir.length - 1])) {
			files[lastDir[lastDir.length - 1]].push({ file: fileStats.name, head: '', text: ''});
		}
		next();
	}
}).on("errors", function (root, nodeStatsArray, next) {
	next();
}).on("end", function () {

	for(var slides in files) {
		if(!files.hasOwnProperty(slides)) { continue; }
		var data = fs.readFileSync(__dirname+'/slideshows/'+slides+'/desc');
		var descs = data.toString().split('\n');
		for(var file in slides) {
			if(!files[slides].hasOwnProperty(file)) { continue; }
			if(!files[slides][file].hasOwnProperty('file')) { continue; }
			for(var desc in descs) {
				if(!descs.hasOwnProperty(desc)) { continue; }
				var info = descs[desc].split('|');
				if(info[0] === files[slides][file]['file']) {
					files[slides][file]['head'] = info[1];
					files[slides][file]['text'] = info[2];
				}
			}
		}
	}
	Connect.createServer(
		Connect.logger(), // Log responses to the terminal using Common Log Format.
		Connect.responseTime(), // Add a special header with timing information.
		Connect.staticCache(),
		Connect.static( __dirname + '/slideshows'), // Serve all static files in the current dir.
		function(req, res) {
			var purl = url.parse(req.url, true);
			var slideset = 'default'; 
			if(purl['query'].hasOwnProperty('slides')) {
				slideset = purl['query']['slides'];
			}
			if(!files.hasOwnProperty(slideset)) { res.end(); return; }
			
			fs.readFile('./slideshows/'+slideset+'/template.html', function(err,data){
				if(err) {
					res.end(body);
				}
				var body = data.toString();
				var slides = '';
				for(var file in files[slideset]) {
					if (!files[slideset].hasOwnProperty(file)) { continue; }
					if (!files[slideset][file].hasOwnProperty('file')) { continue; }
					slides = slides+'<li><img src="/'+slideset+'/'+files[slideset][file]['file']+'">'
					if(files[slideset][file]['text']) {
						slides = slides+'<div class="transover"><h2>'+files[slideset][file]['head']+' - '+files[slideset][file]['text']+'</div></img></li>';
					}
				}
				body = body.replace("$IMAGES", slides);
				res.setHeader('Content-Length', body.length);
				res.end(body);				
			});		
		}
	).listen(8080);
});