const express = require('express');
const Database = require('better-sqlite3');
const path = require('path');

const app = express();
const PORT = process.env.PORT || 3000;

// SQLite – keine externe DB nötig
const db = new Database('/data/todos.db');
db.pragma('journal_mode = WAL');
db.exec(`
  CREATE TABLE IF NOT EXISTS todos (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    text TEXT NOT NULL,
    done INTEGER DEFAULT 0,
    created_at TEXT DEFAULT (datetime('now'))
  )
`);
console.log('⚡ DATABASE ONLINE (SQLite) ⚡');

app.use(express.urlencoded({ extended: true }));
app.use(express.static(path.join(__dirname, 'public')));
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));

// Routes
app.get('/', (req, res) => {
  try {
    const todos = db.prepare('SELECT * FROM todos ORDER BY created_at DESC').all();
    res.render('index', { todos, error: null });
  } catch (err) {
    res.render('index', { todos: [], error: 'DATABASE ERROR ⚠' });
  }
});

app.post('/add', (req, res) => {
  const { text } = req.body;
  if (text && text.trim()) {
    db.prepare('INSERT INTO todos (text) VALUES (?)').run(text.trim());
  }
  res.redirect('/');
});

app.post('/toggle/:id', (req, res) => {
  db.prepare('UPDATE todos SET done = NOT done WHERE id = ?').run(req.params.id);
  res.redirect('/');
});

app.post('/delete/:id', (req, res) => {
  db.prepare('DELETE FROM todos WHERE id = ?').run(req.params.id);
  res.redirect('/');
});

app.get('/health', (req, res) => res.json({ status: 'ONLINE', db: 'SQLITE' }));

app.listen(PORT, () => {
  console.log(`╔══════════════════════════════════════╗`);
  console.log(`║   ⚡ TECHNO-TODO v2.0 ONLINE ⚡     ║`);
  console.log(`║   PORT: ${PORT}                       ║`);
  console.log(`║   DB: SQLite (no externals)        ║`);
  console.log(`╚══════════════════════════════════════╝`);
});