#!/usr/bin/env node

require('colors');
var Ne = require('neon');

Nitrogen = {
    Manifest : require('./lib/manifest.js'),
    Server : {}
};

Ne.Class(Nitrogen.Server, 'Editor')({
    prototype : {
        fs : require('fs'),
        express : require('express'),
        httpProxy : require('http-proxy'),
        io : require('socket.io'),
        http : require('http'),
        app : null,
        server : null,
        socket : null,
        port : 4000,
        occipitalOptions : {},

        init : function init(config) {
            Object.keys(config).forEach(function (property) {
                this[property] = config[property];
            }, this); 

            console.log('Nitrogen Session Server starting ');
            this.app = this.express();
            this.proxy = new this.httpProxy.RoutingProxy();
            this.server = this.http.createServer(this.app);
            this.initRack();
            this.initDb();
            this.initRoutes();
            this.server.listen(this.port);
            this.socket = this.io.listen(this.server);
            this.initSyncEvents();
            console.log('Nitrogen Session Server listening on port ' + this.port);
        },

        initRack : function initRack() {
            var nitrogen = this;
            this.app.use(this.express.logger());
            this.app.use(this.express.compress());
            this.app.use(function (request, response, next) {
                response.header("Access-Control-Allow-Origin", "*");
                response.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
                response.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');
                if ('OPTIONS' == request.method) {
                  response.send(200);
                }
                else {
                  next();
                }
            });
            // This has to be here in order for a proxied post to work.
            // See https://github.com/nodejitsu/node-http-proxy/issues/180
            // for more information.
            this.app.use(function (request, response, next) {
                if (request.url.match(/\/attachments\/.*/) && request.method === "POST" ){
                    var options = nitrogen.occipitalOptions;
                    nitrogen.proxy.proxyRequest( request, response, options );
                } else {
                    return next();
                }
            });
            this.app.use(this.express.bodyParser());
            this.app.use('/', this.express.static('public'));
        },

        initDb : function initDb() {
            var fileNames = this.fs.readdirSync(__dirname + '/../').filter(function(fn){ return fn.match(/.*\.json$/); });
            var i, filePath, collectionName;
            data = Nitrogen.data = {};

            for( i=0; i < fileNames.length; i+=1 ){
                filePath = __dirname + '/../' + fileNames[i];
                collectionName = fileNames[i].replace(/.json/, '');
                data[collectionName] = this.fs.readFileSync(filePath).toString().replace(/\n$/, "").split(/\n/).map(function(r){
                    return JSON.parse(r);
                });
            }
        },
        
        initRoutes : function initRoutes() {
            var nitrogen = this,
                path = require('path');

            this.app.get('/', function (request, response) {
                var file = path.resolve('./public/app.html');
                response.sendfile(file);
            });

            this.app.get('/api/all', function (req, res) {
                res.set('Content-Type', 'application/json');
                res.send(JSON.stringify(data));
            });

            this.app.get('/api/:model', function (req, res) {
                var records = data[req.params.model]
                res.set('Content-Type', 'application/json');
                res.send(JSON.stringify(records));
            });

            this.app.get('/api/:model/:id', function (req, res){
                var model = req.params.model;
                var record = data[model].filter(function (record) {
                    return record.id == req.params.id;
                })[0];
                
                if (record) {
                    res.set('Content-Type', 'application/json');
                    res.send(JSON.stringify(record));
                }
                else {
                    res.set('Content-Type', 'application/json');
                    res.send(404, 'record not found');
                }
            });

            this.app.get('/api/:model/:id/delete', function (req, res){
                var model = req.params.model;
                var record = data[model].filter(function (record) {
                    return record.id == req.params.id;
                })[0];

                data[model].splice(data[model].indexOf(record), 1);

                res.set('Content-Type', 'application/json');
                res.send('{}');
            });

            this.app.post('/api/:model/create', function (req, res){
                var model = req.params.model;
                var record = req.body;
                record.id = util.generateUid(24);

                data[model].push(record);

                res.set('Content-Type', 'application/json');
                res.send(JSON.stringify(record));
            });

            this.app.post('/api/:model/:id/update', function (req, res){
                var model = req.params.model;

                var record = data[model].filter(function (record) {
                    return record.id == req.params.id;
                })[0];

                var position = data[model].indexOf(record);
                console.log(req);
                data[model].splice(position, 1, req.body); 

                var record = data[model].filter(function (record) {
                    return record.id == req.params.id;
                })[0];
                res.set('Content-Type', 'application/json');
                res.send(JSON.stringify(record));
            });

            this.app.get('/manifest_doc.js', function (req, res) {
                res.set('Content-Type', 'application/json');

                // Generate the package every time for development
                Manifest.generatePackage(function () {
                    res.sendfile(path.resolve('./public/manifest_doc.js'));
                });
                /* TODO: Uncomment when file detection is done
                nitrogen.fs.exists('./public/manifest_doc.js', function (exists) {
                    if (exists) {
                        res.sendfile(path.resolve('./public/manifest_doc.js'));
                    } else {
                        // create package
                        Manifest.generatePackage(function () {
                            res.sendfile(path.resolve('./public/manifest_doc.js'));
                        });
                    }
                }); */
            });

            this.app.get('/get_assets', function (req, res) {
                res.set('Content-Type', 'text/plain');

                // Generate the package everytime for development
                Manifest.generatePackage(function () {
                    res.sendfile(path.resolve('../app_assets/package.dat'));
                });
                /* TODO: Uncomment when file detection is ready
                nitrogen.fs.exists('../app_assets/package.dat', function (exists) {
                    if (exists) {
                        res.sendfile(path.resolve('../app_assets/package.dat'));
                    } else {
                        // create package
                        Manifest.generatePackage(function () {
                            res.sendfile(path.resolve('../app_assets/package.dat'));
                        });
                    }
                }); */
            });

            this.app.get('/attachments/*', function (req, res) {
                var options = nitrogen.occipitalOptions;

                nitrogen.proxy.proxyRequest( req, res, options );
            });
        },

        initSyncEvents : function () {
            this.socket.sockets.on('connection', function (socket) {
                socket.emit('connected', {message : "Connection established"});

                socket.on('sync', function (sync_data) {
                  console.log(">> Incoming LSD DATA".blue);

                  sync_data = JSON.parse(sync_data);

                  // Let's handle each guy
                  switch(sync_data.action) {
                    case "create":
                      data["tasks"].push(sync_data.data);
                      break;
                    case "update":
                      var record = data["tasks"].filter(function (record) {
                          return record.id == sync_data.data.id;
                      })[0];
                      var position = data["tasks"].indexOf(record);
                      data["tasks"].splice(position, 1, sync_data.data);
                      break;
                    case "remove":
                      var record = data["tasks"].filter(function (record) {
                          return record.id == sync_data.data.id;
                      })[0];
                      var position = data["tasks"].indexOf(record);
                      data["tasks"].splice(position, 1);
                      break;
                  }

                  socket.emit('sync_ok', {message : "Sync Received: OK"});
                });
            });

            this.socket.sockets.on('disconnect', function (socket) {
                socket.emit('disconnected', {message : "Connection lost"});
            });
        }
    }
});

new Nitrogen.Server.Editor({
    port : process.argv[2] || 4000,
    occipitalOptions : {
        host : (process.argv[3]) ? process.argv[3].replace(/:.*/, '') : '127.0.0.1',
        port : (process.argv[3]) ? process.argv[3].replace(/.*:/, '') : '3001'
    }
});