'use strict';

var express  = require('express');
var async    = require('async');
var path     = require('path');
var assets   = require('node-ff-assets');
var fs       = require('fs');
var minify   = require('minify');

function buildAssets(server,callbackDone) {
	var singleResult = 'false' !== process.env.DEV_ASSETS_SINGLE_RESULT;
	var assetsConfig = require('./example-assets.json'); 
	assets.build({
		assets: {
			js: {
				configCreate: assets.factory.builder.configCreate.fromJSON(assetsConfig,'js'),
				configFill: function (config, callback) {
					async.series([
						assets.factory.lib.async.pushLinkSources(config,  '/static/js/',             'www_static/js/'),
						assets.factory.lib.async.pushLinkSources(config,  '/static/js/controller/',  'www_static/js/controller/'),
					],callback);
				},
			},
			css: {
				configCreate: assets.factory.builder.configCreate.fromJSON(assetsConfig,'css'),
				configFill: function (config, callback) {
					async.series([
						assets.factory.lib.async.pushLinkSources(config,  '/static/css/',            'www_static/css/'),
					],callback);
				},
			},
		},
		assemblerCreate: assets.factory.builder.assemblerCreate.readFileRegex(),
		assemblerFill: function (assembler, callback) {
			var serverResultKey = 'ff_assets_'+assembler.config.assetType;
			assembler.on ('log',    assets.factory.assembler.event.log.console(assembler.config.assetType));
			assembler.on ('result', assets.factory.assembler.event.result.objectSet(server,serverResultKey));
			assembler.config.linkTargetSingleResult = singleResult;
			callback();
		},
	},callbackDone);
}

function renderTemplatePath(viewPath) {
	return function (req, res) {
		res.locals.query = req.query;
		var qi = req.url.indexOf('?');
		if (qi === -1) {
			qi = req.url.length;
		}
		res.render(viewPath + req.url.substring(req.route.path.length-1, qi));
	};
}

function renderIndex(server) {
	var inline = '';
	minify(__dirname+'/../es5-ff-spa-loader.js', {}, function(err, data) {
		inline = '\n\t\t<script>'+data+'</script>';
	});
	var inlineNot = '\n\t\t<script src=\"/static/es5-ff-spa-loader.js\"></script>';
	
	var useInline = true; // or false
	
	return function (req, res) {
		res.render('index', {
			inlineNot: useInline?'':inlineNot,
			inline: useInline?inline:''
		});
	};
}

function sendRedirect() {
	return function (req, res) {
		res.redirect('/example-ui');
	};
}

 var stringHash = function (str) {
	var hash = 31; // prime
	for (var i = 0; i < str.length; i++) {
		hash = ((hash<<5)-hash)+str.charCodeAt(i);
		hash = hash & hash; // keep 32b
	}
	return hash;
};

var server = express();
buildAssets(server,function(err) {
	if (err) {
		throw err;
	}
	console.info('Server assets done.');
	
	server.set('view engine', 'ejs');
	server.set('views',                                   path.join(__dirname,'www_views'));
	server.use('/static',                  express.static(path.join(__dirname,'www_static')));
	server.use('/static/module/bootstrap', express.static(path.join(__dirname,'node_modules/bootstrap/dist')));
	server.use('/static/module/flot',      express.static(path.join(__dirname,'node_modules/flot')));
	
	server.get('/static/es5-ff-spa-loader.js', function (req,res) {
		res.write(fs.readFileSync(__dirname+'/../es5-ff-spa-loader.js', 'utf8'));
		res.end();
	});
	server.get('/static/resources-spa-mobile', function (req,res) {
		var hashJs = stringHash(fs.readFileSync(__dirname+'/www_static/js/lib/assets.js', 'utf8'));
		var hashCss = stringHash(fs.readFileSync(__dirname+'/www_static/css/lib/assets.css', 'utf8'));
		res.json({
			data: {
				resources: [
				            {
				                url: '/static/js/lib/assets.js----TODO',
				                type: 'js',
				                hash: hashJs
				            },
				]
			}
		});
	});
	server.get('/static/resources-spa-web', function (req,res) {
		var hashJs = stringHash(fs.readFileSync(__dirname+'/www_static/js/lib/assets.js', 'utf8'));
		var hashCss = stringHash(fs.readFileSync(__dirname+'/www_static/css/lib/assets.css', 'utf8'));
		res.json({
			data: {
				resources: [
				            {
				                url: '/static/js/lib/assets.js',
				                type: 'js',
				                hash: hashJs
				            },
				            {
				            	url: '/static/css/lib/assets.css',
				            	type: 'css',
				                hash: hashCss
				            }
				]
			}
		});
	});
	
	server.get('/',                               sendRedirect());
	server.get('/example-ui/thtml/*',             renderTemplatePath('thtml/'));
	server.get('/example-ui',                     renderIndex(server));
	server.get('/example-ui/*',                   renderIndex(server)); // must be last; for HTML5 history
	console.info('Server config done.');
	
	server.listen(8080);
	console.info('Server started on port 8080');
});