var express = require('express');
var session = require('express-session');
var passport = require('passport');
var localStrategy = require('passport-local').Strategy;

//passport

app.use(passport.initialize());
app.use(passport.session());

var express = require('express');
var User = require('../models/users');
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;

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

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

passport.use(new LocalStrategy(
  function(username, password, done) {
    console.log("enter local startegy");

    User.findUsername(username, function(err, user) {

      if (err) { return done(err); }
      if (!user) {
        console.log("unknown unser");
        return done(null, false, { message: 'Incorrect username.' });
      }

      user.comparePassword(password,user.passport,function (err,isMatch){
        if(err) throw err;
        if(isMatch){
          return done(null, user);
        }else{
          console.log("password not matching");
          return done(null, false, { message: 'Incorrect password.' });
        }
      })
    });

  }

));

router.post('/login',passport.authenticate('local-login', {failureFlash: 'Invalid username or password ,try again',  failureRedirect: '/users/login' }),function(req,res,next){
    console.log('authentication successful');
    req.flash('success','your logged in');
    res.location('/');
    res.redirect('/');
});

var mongos = require('mongoose');
var bcrypt = require('bcrypt');
var db = mongos.connection;

//mongos.connect('mongodb://localhost/nodeauth');

mongos.connect('mongodb://localhost/nodeauth', {
    useMongoClient: true,
    /* other options */
});




// User schema

var userSchema =  mongos.Schema({

    username : {
        type: String,
        index: true
    },

    password: {
        type: String,
        required: true,
        bcrypt: true,
    },

    email: {
        type: String,
    },

    name: {
        type: String,
    },
    image: {
        type: String,
    }
});

var User =  module.exports = mongos.model('User',userSchema);

// check password .. for login
module.exports.comparePassword = function(password ,hash,callback){
    console.log("checking password");

        bcrypt.compare(password,hash,function(err ,isMatach){

            if(err) return callback(err);
            return(null,isMatach);

        });
}

// check user name ... for login
module.exports.findUsername = function(username , callback){
    console.log("checking username");
    User.findOne({username:username},callback);
}

// check id .. for login
module.exports.findId = function(id , callback){
    User.findById(id,callback);
}


// check user
module.exports.createUser = function(newUser,callback){

    bcrypt.hash(newUser.password,10,function(err,hash){
        if(err) throw err;
        // set new password
        newUser.password = hash;
        // create user
        newUser.save(callback);

    });


}