const pool = require('../config/db');
const { logActivity } = require('../services/activityLog');

exports.listByMember = async (req, res) => {
  try {
    const [rows] = await pool.query(`
      SELECT a.*,
             u.prenom AS created_prenom,
             r.prenom AS remplace_prenom, r.nom AS remplace_nom,
             rg.prenom AS remplace_guest_prenom, rg.nom AS remplace_guest_nom
      FROM absences a
      LEFT JOIN users u ON u.id = a.created_by
      LEFT JOIN users r ON r.id = a.remplace_par_id AND (a.remplace_par_type = 'member' OR a.remplace_par_type IS NULL)
      LEFT JOIN invites rg ON rg.id = a.remplace_par_guest_id AND a.remplace_par_type = 'guest'
      WHERE a.membre_id = ?
      ORDER BY a.date_absence DESC
    `, [req.params.id]);
    res.json(rows);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Erreur serveur' });
  }
};

exports.create = async (req, res) => {
  try {
    const { membre_id, date_absence, motif, prevenu, remplace_par_type, remplace_par_guest_id, remplace_par_id } = req.body;
    const rType = remplace_par_type === 'guest' && remplace_par_guest_id ? 'guest' : 'member'
    const rMemberId = rType === 'member' ? (remplace_par_id || null) : null
    const rGuestId = rType === 'guest' ? (remplace_par_guest_id || null) : null
    await pool.query(
      'INSERT INTO absences (membre_id, date_absence, motif, prevenu, remplace_par_id, remplace_par_type, remplace_par_guest_id, created_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
      [membre_id, date_absence, motif || null, prevenu ? 1 : 0, rMemberId, rType, rGuestId, req.user.id]
    );
    logActivity(req, 'absence_ajout', { membre_id, date_absence });
    res.status(201).json({ message: 'Absence enregistrée' });
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Erreur serveur' });
  }
};

exports.remove = async (req, res) => {
  try {
    await pool.query('DELETE FROM absences WHERE id = ?', [req.params.id]);
    logActivity(req, 'absence_suppression', { absenceId: req.params.id });
    res.json({ message: 'Absence supprimée' });
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Erreur serveur' });
  }
};

exports.stats = async (req, res) => {
  try {
    const [rows] = await pool.query(`
      SELECT u.id, u.prenom, u.nom, COUNT(a.id) AS total_absences
      FROM users u
      LEFT JOIN absences a ON a.membre_id = u.id
      WHERE u.actif = 1
      GROUP BY u.id
      ORDER BY total_absences DESC
      LIMIT 10
    `);
    res.json(rows);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Erreur serveur' });
  }
};