/*
	This file defines the 'strategies' of authenticating users to the app
*/

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

// What's passport in this context, name of file, or module name?
// Passport is the object passed to this function (through the initial Passport constructor)
module.exports = function(passport) {

	// Assign user with 'id' with a session
	passport.serializeUser(function(user, done) {
		done(null, user.toJSON().id);
	});

	// Release user with 'id' from a session
	passport.deserializeUser(function(id, done) {
		User.fetch({id: id})
			.then(function(user) {
				done(null, user.toJSON());
			})
			.catch(function(err) {
				done(err, null);
			})
	});

	passport.use('local-signup', new LocalStrategy({
		nameField: 'name',
		emailField: 'email',
		passwordField: 'password',
		passReqToCallback: true
	}, function(req, name, email, password, done) {
		process.nextTick(function() {		// What is this 'nextTick' bs?

			console.log('Trying to sign up...');

			User.where('email', email)
				.fetch()
				.then(function(user) {
					if (user) {
						return done(null, false, req.flash('signupMessage', 'That email is already in use.'));
					} else {
						var newUser = new User({
							name: username,
							email: email,
							password: User.generateHash(password)
						});
						newUser.save(null, {method: 'insert'});
						console.log('User successfully created!');
					}
				})
				.catch(function(err) {
					return done(err);
				});

		});
	}));

	passport.use('local-login', new LocalStrategy({
		usernameField: 'email',
		passwordField: 'password',
		passReqToCallback: true
	},
	function(req, email, password, done) {
		console.log('requested email: ' + email);
		new User({'email': email}).fetch()
			.then(function(user) {
				if (!user) {
					console.log('no user found');
					return done(null, false, req.flash('loginMessage', 'No user found.'));
				}
				if (!user.validPassword(password)) {
					console.log('incorrect password');
					return done(null, false, req.flash('loginMessage', 'Incorrect password.'));
				}
				console.log('User successfully logged in!');
				return done(null, user);
			})
			.catch(function(err) {
				console.log('error with logging in lol');
				console.log(err);
				return done(err);
			});
	}));
};