const express = require('express');
const router = express.Router();
const passport = require('passport');
const jwt = require('jsonwebtoken');
const config = require('../../config/database');
const User = require('../../models/user');
/*const MongoClient = require('mongodb').MongoClient;
const ObjectID = require('mongodb').ObjectID;

const passport = require('passport');
const jwt = require('jsonwebtoken');*/


//REGISTER
router.post('/register',(req,res,next)=>{
	let newUser = new User({
		//name: req.body.name,
		email: req.body.email,
		//username: req.body.username,
		password: req.body.password
	});

	// Check if a user with that email is already registered
	User.getUserByUsername(newUser.email, (error, user)=>{
	let newUser = new User({
		email: req.body.email,
		password: req.body.password
	});

	// Check if a user with that email is already registered
	User.getUserByEmail(newUser.email, (error, user)=>{

		// Throw error if any
		if(error) throw error;

		console.log('user email is '+newUser.email);
		// email not found
		if(!user){
			console.log('New user');
			User.addUser(newUser, (err, user)=>{
				if(err){
					res.json({
						success: false,
						message: 'Failed to register user'
					});
				}
				else{
					res.json({
						success: true,
						message: 'User successfully registered'
					});
				}
			});
		}
		// email is found - user already exists
		else{
			console.log('This email already exists');
			res.json({
					success: false,
					message: 'Email already in use'
				});
		}
	});
});
});

//AUTHENTICATE
router.post('/authenticate',(req,res,next)=>{
  const email = req.body.email;
  const password = req.body.password;
  User.getUserByEmail(email, (err, user) => {
    if(err) throw err;
    if(!user){
      return res.json({success: false, msg: 'User not found'});
    }

    User.comparePassword(password, user.password, (err, isMatch) => {
      if(err) throw err;
      if(isMatch){
          //const token = jwt.sign(user, config.secret, { to const token = jwt.sign({data: user}, config.secret, {
        const token = jwt.sign({data: user}, config.secret, {
          expiresIn: 604800 // 1 week
        });

        res.json({
          success: true,
          token: 'JWT '+token,
          user: {
            id: user._id,
            //name: user.name,
            ///username: user.username,
            email: user.email
          }
        });
      } else {
        return res.json({success: false, msg: 'Wrong password'});
      }
    });
  });
});
//PROFILE
router.get('/profile', passport.authenticate('jwt', {session:false}),(req,res,next)=>{
    res.json({user: req.user});
});

module.exports = router;