import express from 'express';
import { JsonDB, Config } from 'node-json-db';

const app = express();

const db = new JsonDB(new Config("db", true, true, '/'));
const port = process.env.PORT || 4000;

app.use(express.json());

// CORS settings
app.use((req, res, next) => {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE');
    res.setHeader('Access-Control-Allow-Headers', 'Content-Type');
    next();
});

// Get all
app.get('/waiters', async (req, res) => {
    res.send(await db.getData('/waiters'));
});

// Create one
app.post('/waiters', async (req, res) => {
    let newWaiter = req.body;
    // Generate id
    newWaiter.id = crypto.randomUUID();
    await db.push("/waiters/" + newWaiter.id, newWaiter);
    res.send(newWaiter);
});

// Get one
app.get('/waiters/:id', async (req, res) => {
    const id = req.params.id;
    const waiter = await db.getData('/waiters/' + id);
    if (!waiter) {
        res.status(404).json({ message: 'Waiter not found' });
        return;
    }
    res.send(waiter);
});

// Get all for one restaurant
app.get('/waiters/from-restaurant/:id', async (req, res) => {
    const restaurantId = req.params.id;
    const waiters = await db.filter('/waiters', w => w.restaurant_id === restaurantId);
    res.send(waiters ?? []);
});

// Update one
app.put('/waiters/:id', async (req, res) => {
    const id = req.params.id;
    const updatedWaiter = req.body;
    const waiterExists = await db.exists('/waiters/' + id);

    if (!waiterExists) {
        res.status(404).json({ message: 'Waiter not found' });
        return;
    }

    updatedWaiter.id = id;

    await db.push('/waiters/' + id, updatedWaiter, true);
    res.send(updatedWaiter);
});

// Delete one
app.delete('/waiters/:id', async (req, res) => {
    const id = req.params.id;
    const waiterExists = await db.exists('/waiters/' + id);

    if (!waiterExists) {
        res.status(404).json({ message: 'Waiter not found' });
        return;
    }

    await db.delete('/waiters/' + id);
    res.status(200);
});

app.listen(port)