const express = require('express');
const { Client } = require('pg');
const bodyParser = require('body-parser');
const path = require('path');

const app = express();
const port = 3000;

// Middleware
app.use(bodyParser.json());
app.use(express.static('public'));

// PostgreSQL config
const client = new Client({
  host: process.env.DB_HOST,
  port: process.env.DB_PORT,
  user: process.env.DB_USER,
  password: process.env.DB_PASSWORD,
  database: process.env.DB_NAME
});

client.connect()
  .then(() => {
    console.log('Connected to PostgreSQL');
    // Créer la table si elle n'existe pas
    return client.query(`
      CREATE TABLE IF NOT EXISTS todos (
        id SERIAL PRIMARY KEY,
        text VARCHAR(255) NOT NULL,
        completed BOOLEAN DEFAULT false
      );
    `);
  })
  .then(() => console.log('Table ready'))
  .catch(err => console.error('DB error:', err));

// Routes API
app.get('/api/todos', async (req, res) => {
  try {
    const result = await client.query('SELECT * FROM todos ORDER BY id DESC');
    res.json(result.rows);
  } catch (err) {
    res.status(500).send('Error fetching todos');
  }
});

app.post('/api/todos', async (req, res) => {
  const { text } = req.body;
  if (!text) return res.status(400).send('Missing todo text');
  try {
    await client.query('INSERT INTO todos (text) VALUES ($1)', [text]);
    res.status(201).send('Todo added');
  } catch (err) {
    res.status(500).send('Error adding todo');
  }
});

app.delete('/api/todos/:id', async (req, res) => {
  const { id } = req.params;
  try {
    await client.query('DELETE FROM todos WHERE id = $1', [id]);
    res.send('Todo deleted');
  } catch (err) {
    res.status(500).send('Error deleting todo');
  }
});

// Lancer le serveur
app.listen(port, () => {
  console.log(`Todo app listening at http://localhost:${port}`);
});