const express = require('express');
const router = express.Router();
const passport = require('passport');
const User = require('../models/user');
const Book = require('../models/book');
const books = require('google-books-search');
const option = require('../config/bookAPI');
const nodemailer = require('nodemailer');

// create reusable transporter object using the default SMTP transport
const transporter = nodemailer.createTransport({
		host: 'smtp.gmail.com',
		port: 465,
		secure: true,
		auth: {
				user: process.env.GMAIL_USER,
				pass: process.env.GMAIL_PASS
		}
});

function isLoggedIn(req, res, next) {
	if(!req.isAuthenticated()) {
		req.flash("error", "You must be logged in to do that.");
		res.redirect("/login");
	}
	else{
		next();
	}
}

function isVerified(req, res, next) {
	// console.log(req.user.verified);
	if(!req.user.verified) {
		// console.log(req.user.verified);
		req.logout();
		req.flash("warning", "Please check your email to verify your account before logging in.");
		res.redirect("/login");
	} else {
		next();
	}
}

function usernameToLowerCase(req, res, next){
    req.body.username = req.body.username.toLowerCase();
    next();
}


// Define a route to the root of the application.
router.get('/', (req, res) => {
  res.render('home', {currentUser: req.user});
});


// Sign up routes
router.get('/signup', (req, res) => {
  res.render('signup');
});

router.post('/signup', usernameToLowerCase, (req, res) => {
	var newUser = new User(
	{
		verified: false,
		first: req.body.first_name,
		last: req.body.last_name,
		username: req.body.username,
		library: [],
  	wishlist: []

	});
	// Confirm new user's email address to avoid spam registration
	var mailOptions,host,link,email;
	User.register(newUser, req.body.password, function(err, user) {
		if(err) {
			// req.flash("error", err);
			req.flash("error", "A user with that email already exists.");
			res.redirect('signup');
		} else {
			// A verification link is emailed to user
			host = req.get('host');

			// User ID is the database id
			var userID = user.id;

			// host = "localhost:3000";

			link ="http://"+host+"/verify/"+userID;

			// setup email data
			email = {
				to : req.body.username,
				subject : "Bookhunter: Please confirm your Email account",
				html : "Hello,<br> Please Click on the link to verify your email for Bookhunter account.<br><a href="+link+">Click here to verify</a>"
			};
			// send mail with defined transport object
			transporter.sendMail(email, (error, info) => {
					if (error) {
							return console.log(error);
					}
					console.log('Message sent: %s', info.messageId);
			});
			req.flash("warning", "Please check your email to verify your account.")
			res.redirect('login');
		}
	});
});

router.get('/verify/:id', (req, res) => {
	// Search database for user by the id
	User.findById(req.params.id, function(err, foundUser){
		if (err) {
			req.flash("error", JSON.stringify(err));
			res.redirect('login');
		} else {
			//if user exists, set their verified value to true
			passport.authenticate('local');
			foundUser.verified = true;
			foundUser.save();
			req.flash("success", "Email verification successful.")
			res.redirect('/login');
		}
	});
});


// Log in routes
router.get('/login', (req, res) => {
  res.render('login');
});


router.post('/login', usernameToLowerCase, passport.authenticate('local',
	{
		successRedirect: '/profile',
		failureRedirect: 'login',
		failureFlash: true
	}), (req, res) => {

});


// Log out route
router.get("/logout", function(req, res) {
	req.logout();
	req.flash("success", "Successfully logged out.");
	res.redirect("/login");
});

// All Books route
router.get('/allbooks', isLoggedIn, isVerified, (req, res) => {
	User.find({}, function(err, allUsers) {
		if(err) {
			console.log(err);
		} else {
			res.render("allbooks", {users: allUsers, currentUser: req.user});
		}
	});
});

// Help Page route
router.get('/help', (req, res) => {
  res.render('help', {currentUser: req.user});
});

// Contact form submission route
router.post('/send', (req, res) => {
  const output = `
		<p>You have a new contact request:</p>
		<h3>Contact Details</h3>
		<ul>
			<li>Name: ${req.body.contact_name}</li>
			<li>Email: ${req.body.contact_email}</li>
			<li>Subject: ${req.body.contact_subject}</li>
		</ul>
		<h3>Message</h3>
		<p>${req.body.contact_message}</p>
	`;

  // setup email data with unicode symbols
  let mailOptions = {
      from: '"Nodemailer Contact" <test@bookhunter.com', // sender address
      to: 'bookhunter.huntercollege@gmail.com', // list of receivers
      subject: 'New message from contact form at BookHunter.com',
      text: "Hello Boookhunter!",
			html: output
  };

  // send mail with defined transport object
  transporter.sendMail(mailOptions, (error, info) => {
      if (error) {
          return console.log(error);
      }
      console.log('Message sent: %s', info.messageId);
      console.log('Preview URL: %s', nodemailer.getTestMessageUrl(info));

		// rerender our home page with message
		res.render('home', {msg: "Thank you! Email has been sent."});
  });

});

// Testing profile page
router.get('/profile', isLoggedIn, isVerified, (req, res) => {

	User.find({}, function(err, allUsers) {
		if(err) {
			console.log(err);
		}
			Book.find( {book_owner: req.user.id, inLibrary: true}, function(err, librarybooks){

				if(err){
					console.log(err);
				}
				else {
					Book.find( {book_owner: req.user.id, inWishlist: true}, function(err, wishlistbooks){
						if(err){
								console.log(err);
						}
						else {// console.log(books);
								res.render("profile", {
								librarybooks: librarybooks,
								wishlistbooks: wishlistbooks,
								users: allUsers,
								currentUser: req.user
								});
						}
					})
				}
			});

	});
});
// Testing Add Book page
// router.get('/addbook', isLoggedIn, (req, res) => {
//   res.render('addbook', {currentUser: req.user});
// });

// SEARCH ROUTE FOR BOOKS TO ADD THEM TO THE LIBRARY
router.get('/search', isLoggedIn, (req, res) => {
  var title = req.query.title;
  // console.log(title);
  books.search(title, option, function(error, results, apiResponse){
    if(!error){
			//console.log(results);
      res.render('search', {
				currentUser: req.user,
        title: req.query.title,
        books: results
      })
    } else {
      //console.log(error);
      res.status(404).send('File Not Found!');
    }
  })
});

//ADD A BOOK TO USER'S LIBRARY
router.post('/toLibrary',isLoggedIn, function(req,res){
	var newBook = new Book({
		book_id: req.body.book_id,
		book_title: req.body.book_title,
		book_link: req.body.book_link,
		book_publisher: req.body.book_publisher,
	  book_thumbnail: req.body.book_thumbnail,
		book_owner: req.user._id,
		inWishlist: false,
		inLibrary: true
	});

	newBook.save(function(err){
		if(err){
			console.log(err);
		}
		User.findById(req.user._id, function(err, foundUser){
			if(err){
				console.log(err);
				return;
			}
			foundUser.library.push(newBook);
			foundUser.save(function(err){
				if(err){
					console.log(err);
					return;
				}
				res.redirect('/profile');
			})
		})
	})
});

//ADD A BOOK TO USER'S WISHLIST
router.post('/toWishlist',isLoggedIn, function(req,res){
	var newBook = new Book({
		book_id: req.body.book_id,
		book_title: req.body.book_title,
		book_link: req.body.book_link,
		book_publisher: req.body.book_publisher,
	  book_thumbnail: req.body.book_thumbnail,
		book_owner: req.user._id,
		inWishlist: true,
		inLibrary: false
	});

	newBook.save(function(err){
		if(err){
			console.log(err);
		}
		User.findById(req.user._id, function(err, foundUser){
			if(err){
				console.log(err);
				return;
			}
			foundUser.wishlist.push(newBook);
			foundUser.save(function(err){
				if(err){
					console.log(err);
					return;
				}
				res.redirect('/profile');
			})
		})
	})
});

module.exports = router;