var express  = require('express');
var async    = require('async');
var path     = require('path');
var assets   = require('../lib/node-ff-assets');

var assetsConfig = {
	// Map from uri paths to file systems paths.
	linkMapping : {
		'/static/module/bootstrap/': 'node_modules/bootstrap/dist/',
		'/static/module/flot/':      'node_modules/flot/',
		'/static/':                  'www_static/',
	},
	linkSourcesCss : [
		'/static/module/bootstrap/css/bootstrap.css',
	],
	linkSourcesJs : [
		'/static/js/lib/jquery-2.1.3/jquery.js@http://code.jquery.com/jquery-2.1.3.js',
		'/static/module/bootstrap/js/bootstrap.js',
		'/static/module/flot/jquery.flot.js',
		'/static/module/flot/jquery.flot.resize.js',
		'/static/module/flot/jquery.flot.pie.js',
		'/static/js/lib/angularjs-1.4.0-b4/angular.js@https://code.angularjs.org/1.4.0-beta.4/angular.js',
		'/static/js/lib/angularjs-1.4.0-b4/angular-route.js@https://code.angularjs.org/1.4.0-beta.4/angular-route.js',
		'/static/js/lib/angularjs-1.4.0-b4/angular-resource.js@https://code.angularjs.org/1.4.0-beta.4/angular-resource.js',
		'/static/js/lib/angularjs-1.4.0-b4/angular-touch.js@https://code.angularjs.org/1.4.0-beta.4/angular-touch.js',
	],
}

//callback helper to return an assembler config per asset type
function createBuildConfig(type) {
	return function(callback) {
		var singleResult = 'false' != process.env.DEV_ASSETS_SINGLE_RESULT;
		console.info('Asset single page result: '+singleResult+' for: '+type);
		if (type == 'css') {
			callback(null,{
				linkMapping: assetsConfig.linkMapping,
				linkTargetSingleResult: singleResult,
				linkTarget: '/static/css/lib/assets.css',
				linkSources: assetsConfig.linkSourcesCss,
				assetType: type,
			});
		} else {
			callback(null, {
				downloadStartDelay: 200,
				linkTargetSingleResult: singleResult,
				linkMapping: assetsConfig.linkMapping,
				linkTarget: '/static/js/lib/assets.js',
				linkSources: assetsConfig.linkSourcesJs,
				assetType: type,
			});
		}
	}
}

function buildAssets(server,callbackDone) {
	assets.build({
		assets: {
			js: {
				configCreate: createBuildConfig('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: createBuildConfig('css'),
				configFill: function (config, callback) {
					async.series([
						assets.factory.lib.async.pushLinkSources(config, '/static/css/',            'www_static/css/'),
					],callback);
					
				},
				assemblerCreate: function (assemblerConfig, callback) {
					callback(null,new assets.AssetAssembler(assemblerConfig,assets.factory.assembler.constructor.readFileMinify()));
				},
			},
		},
		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));
			callback();
		},
	},callbackDone);
}

function renderTemplate(server) {
	return function (req, res, next) {
		if (req.params.sub) {
			res.render('include/' + req.params.page + '/' + req.params.sub);
		} else {
			res.render('include/' + req.params.page);
		}
	}
}

function renderPage(server) {
	return function (req, res, next) {
		res.render('index', {
			includeCssFiles:    server.get('ff_assets_css'),
			includeJsFiles:     server.get('ff_assets_js'),
		});
	}
}

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


var server = express();
buildAssets(server,function(err) {
	if (err) {
		throw err;
	}
	console.info('Server assets done.');
	
	server.set('view engine', 'jade');
	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('/example-ui/include/:page',       renderTemplate());
	server.get('/example-ui/include/:page/:sub',  renderTemplate());
	server.get('/',                               sendRedirect());
	server.get('/example-ui',                     renderPage(server));
	server.get('/example-ui/*',                   renderPage(server)); // must be last; for HTML5 history
	console.info('Server config done.');
	
	server.listen(8080);
	console.info('Server started on port 8080');
});

module.exports = {
	version: 'example'
};