const express = require('express');
const router = express.Router();
const pool = require('../db');
const { authMiddleware } = require('./auth');

// Get all events for user
router.get('/', authMiddleware, async (req, res) => {
  try {
    const result = await pool.query(
      'SELECT * FROM events WHERE user_id = $1 ORDER BY date ASC',
      [req.userId]
    );
    res.json(result.rows);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Server error' });
  }
});

// Get single event
router.get('/:id', authMiddleware, async (req, res) => {
  try {
    const result = await pool.query(
      'SELECT * FROM events WHERE id = $1 AND user_id = $2',
      [req.params.id, req.userId]
    );
    if (result.rows.length === 0) return res.status(404).json({ error: 'Event not found' });
    res.json(result.rows[0]);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Server error' });
  }
});

// Create event
router.post('/', authMiddleware, async (req, res) => {
  const { name, date, location, event_type, budget, notes } = req.body;
  if (!name || !date) return res.status(400).json({ error: 'Name and date are required' });
  try {
    const result = await pool.query(
      `INSERT INTO events (user_id, name, date, location, event_type, budget, notes)
       VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING *`,
      [req.userId, name, date, location, event_type || 'general', budget || 0, notes]
    );
    res.status(201).json(result.rows[0]);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Server error' });
  }
});

// Update event
router.put('/:id', authMiddleware, async (req, res) => {
  const { name, date, location, event_type, budget, status, notes } = req.body;
  try {
    const result = await pool.query(
      `UPDATE events SET name=$1, date=$2, location=$3, event_type=$4, budget=$5, status=$6, notes=$7
       WHERE id=$8 AND user_id=$9 RETURNING *`,
      [name, date, location, event_type, budget, status, notes, req.params.id, req.userId]
    );
    if (result.rows.length === 0) return res.status(404).json({ error: 'Event not found' });
    res.json(result.rows[0]);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Server error' });
  }
});

// Delete event
router.delete('/:id', authMiddleware, async (req, res) => {
  try {
    const result = await pool.query(
      'DELETE FROM events WHERE id=$1 AND user_id=$2 RETURNING id',
      [req.params.id, req.userId]
    );
    if (result.rows.length === 0) return res.status(404).json({ error: 'Event not found' });
    res.json({ message: 'Event deleted' });
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Server error' });
  }
});

// Get event stats
router.get('/:id/stats', authMiddleware, async (req, res) => {
  try {
    const [guestsRes, budgetRes, bookingsRes] = await Promise.all([
      pool.query('SELECT rsvp_status, COUNT(*) FROM guests WHERE event_id=$1 GROUP BY rsvp_status', [req.params.id]),
      pool.query('SELECT SUM(estimated_cost) as estimated, SUM(actual_cost) as actual FROM budget_items WHERE event_id=$1', [req.params.id]),
      pool.query('SELECT SUM(cost) as total_bookings FROM bookings WHERE event_id=$1', [req.params.id]),
    ]);
    res.json({
      guests: guestsRes.rows,
      budget: budgetRes.rows[0],
      bookings: bookingsRes.rows[0],
    });
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Server error' });
  }
});

module.exports = router;