import express from 'express';
import { body, validationResult } from 'express-validator';
import pool from '../config/database.js';
import { authenticateToken, requireTenant } from '../middleware/auth.js';

const router = express.Router();
router.use(authenticateToken, requireTenant);

router.get('/', async (req, res) => {
  try {
    const [rows] = await pool.query(
      'SELECT * FROM artikel WHERE tenant_id = ? ORDER BY bezeichnung ASC',
      [req.user.tenant_id]
    );
    res.json(rows);
  } catch (e) { res.status(500).json({ error: 'Serverfehler' }); }
});

router.get('/:id', async (req, res) => {
  try {
    const [rows] = await pool.query(
      'SELECT * FROM artikel WHERE id = ? AND tenant_id = ?',
      [req.params.id, req.user.tenant_id]
    );
    if (rows.length === 0) return res.status(404).json({ error: 'Artikel nicht gefunden' });
    res.json(rows[0]);
  } catch (e) { res.status(500).json({ error: 'Serverfehler' }); }
});

router.post('/', [
  body('bezeichnung').notEmpty().trim(),
  body('pfand_betrag').isFloat({ min: 0 })
], async (req, res) => {
  const errors = validationResult(req);
  if (!errors.isEmpty()) return res.status(400).json({ errors: errors.array() });
  try {
    await pool.query(
      'INSERT INTO artikel (id, tenant_id, bezeichnung, pfand_betrag) VALUES (UUID(), ?, ?, ?)',
      [req.user.tenant_id, req.body.bezeichnung, req.body.pfand_betrag]
    );
    const [rows] = await pool.query(
      'SELECT * FROM artikel WHERE tenant_id = ? ORDER BY erstellt_am DESC LIMIT 1',
      [req.user.tenant_id]
    );
    res.status(201).json(rows[0]);
  } catch (e) { res.status(500).json({ error: 'Serverfehler' }); }
});

router.put('/:id', [
  body('bezeichnung').notEmpty().trim(),
  body('pfand_betrag').isFloat({ min: 0 })
], async (req, res) => {
  const errors = validationResult(req);
  if (!errors.isEmpty()) return res.status(400).json({ errors: errors.array() });
  try {
    const [r] = await pool.query(
      'UPDATE artikel SET bezeichnung=?, pfand_betrag=? WHERE id=? AND tenant_id=?',
      [req.body.bezeichnung, req.body.pfand_betrag, req.params.id, req.user.tenant_id]
    );
    if (r.affectedRows === 0) return res.status(404).json({ error: 'Artikel nicht gefunden' });
    const [rows] = await pool.query('SELECT * FROM artikel WHERE id=? AND tenant_id=?',
                                    [req.params.id, req.user.tenant_id]);
    res.json(rows[0]);
  } catch (e) { res.status(500).json({ error: 'Serverfehler' }); }
});

router.delete('/:id', async (req, res) => {
  try {
    const [r] = await pool.query('DELETE FROM artikel WHERE id=? AND tenant_id=?',
                                 [req.params.id, req.user.tenant_id]);
    if (r.affectedRows === 0) return res.status(404).json({ error: 'Artikel nicht gefunden' });
    res.json({ message: 'Artikel geloescht' });
  } catch (e) { res.status(500).json({ error: 'Serverfehler' }); }
});

export default router;