/**
 * Module dependencies.
 */

var express = require('express'),
    //routes = require('./routes'),
    phantomProxy = require('phantom-proxy'),
    fs = require('fs'),
    path = require('path'),
    api = require('./routes/api');

var app = module.exports = express();

// Configuration

app.configure(function(){
  app.set('env', 'production');
  //app.use(express.logger());
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
});

app.configure('development', function(){
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

app.configure('production', function(){
  app.use(express.errorHandler());
});

// Routes
//app.get('/', routes.index);
//app.get('/partials/:name', routes.partials);
var appRoutes = ["/", "/home", "/contact", "/about"];

phantomProxy.create({}, function (proxy) {
    app.get('*', function(req, res){
        var agent = req.headers["user-agent"];
        //console.log(req.ip + " sended a request for URL "+req.url+" -with user-agent " + agent);
        var filePath = './public' + req._parsedUrl.pathname;
        fs.exists(filePath, function (exists) {
           if(exists){
               res.sendfile(filePath);
           }else{
               if(typeof agent === "string"){
                   if(agent.indexOf('Googlebot') === -1){   //user is not googlebot
                       if(appRoutes.indexOf(req._parsedUrl.pathname) !== -1){
                           // redirect all others to the index (client app is then responsible for handling it's route)
                           res.sendfile('./public/index.html');
                       }else{
                           res.send(404);
                           console.log('File '+filePath+' doesnt exist');
                       }
                   }else{
                       console.log('Request sent by crawler, will start phantom');

                       var page = proxy.page;
                       page.open('http://localhost'+ req._parsedUrl.pathname , function () {
                           page.waitForSelector('#main *', function () {
                               console.log('main div children present');
                               var pageContent = null;
                               page.evaluate(function () {
                                   return document.getElementsByTagName('html')[0].innerHTML;
                               }, function(ret){
                                   pageContent = ret;
                                   console.log("PhantomJS callback has been fired");

                                   res.send(pageContent);
                                   res.end();

                               });


                           });
                       });
                   }
               }

           }
        });
    });
    process.on('exit', function() {
        console.log('About to exit, we shall close the phantom process.');
        proxy.end(function(){});
    });
});
// Start server

app.listen(80, function(){
  console.log("Express server listening on port %d in %s mode", this.address().port, app.settings.env);
});