const express = require(`express`);
const app = express();
const passport = require(`passport`);
const {
	users
} = require(`./controllers`);

/**
 * Configure Passport
 */

try {
	require(`./config/passport`)(passport);
} catch (error) {
	console.log(error);
}

/**
 * Configure Express.js Middleware
 */

// Enable CORS
app.use(function (req, res, next) {
	res.header(`Access-Control-Allow-Origin`, `*`);
	res.header(`Access-Control-Allow-Methods`, `*`);
	res.header(`Access-Control-Allow-Headers`, `*`);
	res.header(`x-powered-by`, `serverless-express`);
	next();
});

// Initialize Passport and restore authentication state, if any, from the session
app.use(passport.initialize());
app.use(passport.session());

// Enable JSON use
app.use(express.json());

// Since Express doesn't support error handling of promises out of the box,
// this handler enables that
const asyncHandler = fn => (req, res, next) => {
	return Promise
		.resolve(fn(req, res, next))
		.catch(next);
};

/**
 * Routes - Public
 */

app.options(`*`, (req, res) => {
	res.status(200).send();
});

app.post(`/users/register`, asyncHandler(users.register));

app.post(`/users/login`, asyncHandler(users.login));

app.get(`/test/`, (req, res) => {
	res.status(200).send(`Request received`);
});

/**
 * Routes - Protected
 */

app.post(`/user`, passport.authenticate(`jwt`, { session: false }), asyncHandler(users.get));

/**
 * Routes - Catch-All
 */

app.get(`/*`, (req, res) => {
	res.status(404).send(`Route not found`);
});

/**
 * Error Handler
 */
app.use(function (err, req, res) {
	console.error(err);
	res.status(500).json({ error: `Internal Serverless Error - "${err.message}"` });
});

module.exports = app;