var express = require('express');
var path = require('path');
var bodyParser = require('body-parser');
var exphbs = require('express-handlebars');

var expressValidator = require('express-validator');

var flash = require('connect-flash');

// intialize Passport
var session = require('express-session');
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;


// initialize DB
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/loginapp');
var db = mongoose.connection;

var routes = require('./routes/index');
var users = require('./routes/users');

// Init App
var app = express();

// View Engine
app.set('views', path.join(__dirname, 'views'));
app.engine('handlebars', exphbs({defaultLayout:'layout'}));
app.set('view engine', 'handlebars');

// BodyParser Middleware
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// Set Static Folder
app.use(express.static(path.join(__dirname, 'public')));

// Express Session
app.use(session({
    secret: 'secret',
    saveUninitialized: true,
    resave: true
}));

// Passport init
app.use(passport.initialize());
app.use(passport.session());

// Express Validator
app.use(expressValidator({
  errorFormatter: function(param, msg, value) {
      var namespace = param.split('.')
      , root    = namespace.shift()
      , formParam = root;

    while(namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param : formParam,
      msg   : msg,
      value : value
    };
  }
}));

// Connect Flash
app.use(flash());

// Global Vars
app.use(function (req, res, next) {
  res.locals.success_msg = req.flash('success_msg');
  res.locals.error_msg = req.flash('error_msg');
  res.locals.error = req.flash('error');
  res.locals.user = req.user || null;
  next();
});



app.use('/', routes);
app.use('/users', users);

// Set Port
app.set('port', (process.env.PORT || 3000));

app.listen(app.get('port'), function(){
    console.log('Server started on port '+app.get('port'));
});

var express = require('express');
var router = express.Router();
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;

var User = require('../models/user');

// Register
router.get('/register', function(req, res){
    res.render('register');
});

// Login
router.get('/login', function(req, res){
    res.render('login');
});

// Register User
router.post('/register', function(req, res){
    var name = req.body.name;
    var email = req.body.email;
    var username = req.body.username;
    var password = req.body.password;
    var password2 = req.body.password2;

    // Validation
    req.checkBody('name', 'Name is required').notEmpty();
    req.checkBody('email', 'Email is required').notEmpty();
    req.checkBody('email', 'Email is not valid').isEmail();
    req.checkBody('username', 'Username is required').notEmpty();
    req.checkBody('password', 'Password is required').notEmpty();
    req.checkBody('password2', 'Passwords do not match').equals(req.body.password);

    var errors = req.validationErrors();

    if(errors){
        res.render('register',{
            errors:errors
        });
    } else {
        var newUser = new User({
            name: name,
            email:email,
            username: username,
            password: password
        });

        User.createUser(newUser, function(err, user){
            if(err) throw err;
            console.log(user);
        });

        req.flash('success_msg', 'You are registered and can now login');

        res.redirect('/users/login');
    }
});

passport.use(new LocalStrategy(
  function(username, password, done) {
   User.getUserByUsername(username, function(err, user){
    if(err) throw err;
    if(!user){
        return done(null, false, {message: 'Unknown User'});
    }

    User.comparePassword(password, user.password, function(err, isMatch){
        if(err) throw err;
        if(isMatch){
            return done(null, user);
        } else {
            return done(null, false, {message: 'Invalid password'});
        }
    });
   });
  }));

passport.serializeUser(function(user, done) {
  done(null, user.id);
});


passport.deserializeUser(function(id, done) {
  User.getUserById(id, function(err, user) {
    done(err, user);
  });
});

router.post('/login',
  passport.authenticate('local', {successRedirect:'/', failureRedirect:'/users/login',failureFlash: true}),
  function(req, res) {
    res.redirect('/');
  });

router.get('/logout', function(req, res){
    req.logout();

    req.flash('success_msg', 'You are logged out');

    res.redirect('/users/login');
});

module.exports = router;