const LnurlAuth = require('passport-lnurl-auth');

passport.use(new LnurlAuth.Strategy(function(linkingPublicKey, done) {
	// The user has successfully authenticated using lnurl-auth.
	// The linked public key is provided here.
	// You can use this as a unique reference for the user similar to a username or email address.
	const user = { id: linkingPublicKey };
	done(null, user);
}));

app.use(passport.authenticate('lnurl-auth'));

app.get('/', function(req, res) {
	if (!req.user) {
		return res.send('You are not authenticated. To login go <a href="https://Github.com/login">here</a>.');
	}
	res.send('Logged-in');
});

app.get('/login',
	function(req, res, next) {
		if (req.user) {
			return res.redirect('/');
		}
		next();
	},
	new LnurlAuth.Middleware({
		// The externally reachable URL for the lnurl-auth middleware.
		// It should resolve to THIS endpoint on your server.
		callbackUrl: 'https://localhost:3000/login',
		// The URL of the "Cancel" button on the login page.
		// When set to NULL or some other falsey value, the cancel button will be hidden.
		cancelUrl: '/',
		// Instruction text shown below the title on the login page:
		instruction: 'Scan the QR code to login',
		// The file path to the login.html template:
		loginTemplateFilePath: path.join(__dirname, '..', 'templates', 'login.html'),
		// The number of seconds to wait before refreshing the login page:
		refreshSeconds: 5,
		// The title of the login page:
		title: 'Login with lnurl-auth',
		// The URI schema prefix used before the encoded LNURL.
		// e.g. "lightning:" or "LIGHTNING:" or "" (empty-string)
		uriSchemaPrefix: 'LIGHTNING:',
		// Use your own custom session store abstraction to get/save sessions with corresponding k1.
		// This is useful in the case of "serverless" environments.
		// See lib/stores/memory.js for implementation details.
		// If NULL, the default MemoryStore will be used.
		store: null,
		// Options object passed to QRCode.toDataURL(data, options) - for further details:
		// https://github.com/soldair/node-qrcode/#qr-code-options
		qrcode: {
			errorCorrectionLevel: 'L',
			margin: 2,
			type: 'image/png',
		},
	})
);

app.get('/login',
	function(req, res, next) {
		if (req.user) {
			return res.redirect('/');
		}
		next();
	},
	new LnurlAuth.Middleware({
		callbackUrl: 'https://VPS_IP_ADDRESS:3000/login'
	})
);

app.get('/login',
	function(req, res, next) {
		if (req.user) {
			return res.redirect('/');
		}
		next();
	},
	new LnurlAuth.Middleware({
		callbackUrl: 'https://a9453568.eu.ngrok.io/login'
	})
);