import { config } from 'dotenv';
config();

import express from 'express';
import jwt from 'jsonwebtoken';
import { MongoClient } from 'mongodb';

const client = new MongoClient(process.env.MONGODB);
const app = express();

app.get('/', (_, res) => res.send('social login api\nsource code: https://git.revolt.chat/revolt/social-login-api'));

app.get('/jwt', async (req, res) => {
    const token = req.headers['x-session-token'];
    if (typeof token === 'string') {
        const session = await client.db('revolt')
            .collection('sessions')
            .findOne({
                token
            });

        if (session) {
            const user = await client.db('revolt')
                .collection('users')
                .findOne({
                    _id: session.user_id
                });
            
            if (user) {
                res.send(jwt.sign({
                    id: user._id,
                    username: user.username
                }, process.env.JWT_SECRET, {
                    expiresIn: '1h'
                }));
            } else {
                res.status(400).send('No user.');
            }
        } else {
            res.status(403).send('No session.');
        }
    } else {
        res.status(400).send('No token.');
    }
});

app.post('/info', (req, res) => {
    const token = req.headers['x-jwt'];
    if (token) {
        try {
            res.send(jwt.verify(token, process.env.JWT_SECRET));
        } catch(err) {
            res.status(400).send('Invalid JWT.');
        }
    } else {
        res.status(400).send('No token.');
    }
});

app.listen(50003, () => console.info('listening on :50003'));