/**
 * Controller admin
 */
import bcrypt from 'bcrypt';
import { pool } from '../../db.js';
import { AppError, asyncHandler } from '../middleware/errorHandler.js';

// ============================================
// STATISTIQUES
// ============================================

/**
 * Récupérer les statistiques globales
 * GET /api/admin/statistics
 */
export const getStatistics = asyncHandler(async (req, res) => {
  // Statistiques des utilisateurs
  const usersStats = await pool.query(`
    SELECT
      COUNT(*) as total_users,
      COUNT(CASE WHEN role = 'CLIENT' THEN 1 END) as clients,
      COUNT(CASE WHEN role = 'CLIENT' AND is_active = TRUE THEN 1 END) as active_clients,
      COUNT(CASE WHEN role = 'CLIENT' AND is_active = FALSE THEN 1 END) as inactive_clients,
      COUNT(CASE WHEN role = 'EMPLOYEE' THEN 1 END) as employees,
      COUNT(CASE WHEN role = 'ADMIN' THEN 1 END) as admins,
      COUNT(CASE WHEN is_verified = TRUE THEN 1 END) as verified_users
    FROM users
  `);

  // Statistiques des tickets (mises à jour avec distributed et used)
  const ticketsStats = await pool.query(`
    SELECT
      COUNT(*) as total_tickets,
      COUNT(CASE WHEN user_id IS NOT NULL THEN 1 END) as distributed,
      COUNT(CASE WHEN played_at IS NOT NULL THEN 1 END) as used,
      COUNT(CASE WHEN status = 'PENDING' THEN 1 END) as pending,
      COUNT(CASE WHEN status = 'CLAIMED' THEN 1 END) as claimed,
      COUNT(CASE WHEN status = 'REJECTED' THEN 1 END) as rejected,
      COUNT(CASE WHEN validated_at IS NOT NULL THEN 1 END) as validated
    FROM tickets
  `);

  // Statistiques des prix avec répartition par catégorie
  const prizesStats = await pool.query(`
    SELECT
      COUNT(DISTINCT p.id) as total_prizes,
      COUNT(DISTINCT CASE WHEN p.is_active = TRUE THEN p.id END) as active_prizes,
      SUM(p.stock) as total_stock,
      COUNT(t.id) as distributed
    FROM prizes p
    LEFT JOIN tickets t ON p.id = t.prize_id
  `);

  // Répartition des lots gagnés par catégorie
  const prizeDistribution = await pool.query(`
    SELECT
      p.id as prize_id,
      p.name as prize_name,
      p.type as prize_type,
      COUNT(t.id) as count,
      CASE
        WHEN (SELECT COUNT(*) FROM tickets) > 0
        THEN ROUND((COUNT(t.id)::DECIMAL / (SELECT COUNT(*) FROM tickets)) * 100, 2)
        ELSE 0
      END as percentage
    FROM prizes p
    LEFT JOIN tickets t ON p.id = t.prize_id
    WHERE p.type != 'GRAND_PRIZE'
    GROUP BY p.id, p.name, p.type
    ORDER BY count DESC
  `);

  // Statistiques démographiques - Genre
  const genderStats = await pool.query(`
    SELECT
      COUNT(CASE WHEN gender = 'MALE' THEN 1 END) as male,
      COUNT(CASE WHEN gender = 'FEMALE' THEN 1 END) as female,
      COUNT(CASE WHEN gender = 'OTHER' THEN 1 END) as other,
      COUNT(CASE WHEN gender = 'NOT_SPECIFIED' OR gender IS NULL THEN 1 END) as not_specified
    FROM users
    WHERE role = 'CLIENT'
  `);

  // Statistiques démographiques - Tranches d'âge
  const ageStats = await pool.query(`
    SELECT
      age_range as range,
      COUNT(*) as count
    FROM (
      SELECT
        CASE
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) BETWEEN 0 AND 17 THEN '0-17'
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) BETWEEN 18 AND 25 THEN '18-25'
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) BETWEEN 26 AND 35 THEN '26-35'
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) BETWEEN 36 AND 45 THEN '36-45'
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) BETWEEN 46 AND 55 THEN '46-55'
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) BETWEEN 56 AND 65 THEN '56-65'
          WHEN EXTRACT(YEAR FROM AGE(CURRENT_DATE, date_of_birth)) > 65 THEN '65+'
          ELSE 'Non spécifié'
        END as age_range
      FROM users
      WHERE role = 'CLIENT'
    ) subquery
    GROUP BY age_range
    ORDER BY
      CASE age_range
        WHEN '0-17' THEN 1
        WHEN '18-25' THEN 2
        WHEN '26-35' THEN 3
        WHEN '36-45' THEN 4
        WHEN '46-55' THEN 5
        WHEN '56-65' THEN 6
        WHEN '65+' THEN 7
        ELSE 8
      END
  `);

  // Calculer les pourcentages pour les tranches d'âge
  const totalClients = parseInt(usersStats.rows[0].clients) || 1;
  const ageRanges = ageStats.rows.map(row => ({
    range: row.range,
    count: parseInt(row.count),
    percentage: parseFloat(((parseInt(row.count) / totalClients) * 100).toFixed(2))
  }));

  // Statistiques démographiques - Top villes
  const topCities = await pool.query(`
    SELECT
      city,
      COUNT(*) as count,
      ROUND((COUNT(*)::DECIMAL / (SELECT COUNT(*) FROM users WHERE role = 'CLIENT')) * 100, 2) as percentage
    FROM users
    WHERE role = 'CLIENT' AND city IS NOT NULL AND city != ''
    GROUP BY city
    ORDER BY count DESC
    LIMIT 10
  `);

  // Statistiques du jeu
  const gameStats = await pool.query(`
    SELECT
      start_date,
      end_date,
      is_active,
      total_tickets,
      tickets_generated
    FROM game_settings
    ORDER BY created_at DESC
    LIMIT 1
  `);

  // Formater la réponse selon le format attendu par le frontend
  res.json({
    success: true,
    data: {
      users: {
        total: parseInt(usersStats.rows[0].total_users),
        clients: parseInt(usersStats.rows[0].clients),
        activeClients: parseInt(usersStats.rows[0].active_clients),
        inactiveClients: parseInt(usersStats.rows[0].inactive_clients),
        employees: parseInt(usersStats.rows[0].employees),
        admins: parseInt(usersStats.rows[0].admins),
        verifiedEmails: parseInt(usersStats.rows[0].verified_users)
      },
      tickets: {
        total: parseInt(ticketsStats.rows[0].total_tickets),
        distributed: parseInt(ticketsStats.rows[0].distributed),
        used: parseInt(ticketsStats.rows[0].used),
        pending: parseInt(ticketsStats.rows[0].pending),
        validated: parseInt(ticketsStats.rows[0].validated),
        rejected: parseInt(ticketsStats.rows[0].rejected),
        claimed: parseInt(ticketsStats.rows[0].claimed)
      },
      prizes: {
        total: parseInt(prizesStats.rows[0].total_prizes),
        active: parseInt(prizesStats.rows[0].active_prizes),
        totalStock: parseInt(prizesStats.rows[0].total_stock),
        distributed: parseInt(prizesStats.rows[0].distributed),
        byCategory: prizeDistribution.rows.map(prize => ({
          prizeId: prize.prize_id,
          prizeName: prize.prize_name,
          prizeType: prize.prize_type,
          count: parseInt(prize.count),
          percentage: parseFloat(prize.percentage)
        }))
      },
      demographics: {
        gender: {
          male: parseInt(genderStats.rows[0].male),
          female: parseInt(genderStats.rows[0].female),
          other: parseInt(genderStats.rows[0].other),
          notSpecified: parseInt(genderStats.rows[0].not_specified)
        },
        ageRanges: ageRanges,
        topCities: topCities.rows.map(city => ({
          city: city.city,
          count: parseInt(city.count),
          percentage: parseFloat(city.percentage)
        }))
      },
      game: gameStats.rows[0] || null
    }
  });
});

// ============================================
// GESTION DES PRIX
// ============================================

/**
 * Récupérer tous les prix
 * GET /api/admin/prizes
 */
export const getAllPrizes = asyncHandler(async (req, res) => {
  const result = await pool.query(`
    SELECT
      p.*,
      COALESCE(COUNT(t.id), 0) as total_tickets,
      COALESCE(COUNT(CASE WHEN t.played_at IS NOT NULL THEN 1 END), 0) as tickets_used,
      COALESCE(COUNT(t.id), 0) as initial_stock
    FROM prizes p
    LEFT JOIN tickets t ON p.id = t.prize_id
    GROUP BY p.id
    ORDER BY p.created_at DESC
  `);

  // Transform snake_case to camelCase for frontend
  const transformedData = result.rows.map(row => {
    // Pour GRAND_PRIZE, utiliser le stock de la table prizes car il n'y a pas de tickets créés
    const isGrandPrize = row.type === 'GRAND_PRIZE';
    const initialStock = isGrandPrize ? parseInt(row.stock) : parseInt(row.initial_stock) || 0;

    return {
      ...row,
      initialStock: initialStock,
      ticketsUsed: parseInt(row.tickets_used) || 0,
      isActive: row.is_active,
      createdAt: row.created_at,
      updatedAt: row.updated_at,
    };
  });

  res.json({
    success: true,
    data: transformedData,
  });
});

/**
 * Créer un nouveau prix
 * POST /api/admin/prizes
 */
export const createPrize = asyncHandler(async (req, res) => {
  const { type, name, description, value, stock, probability, isActive } = req.body;

  const result = await pool.query(
    `INSERT INTO prizes (type, name, description, value, stock, probability, is_active)
     VALUES ($1, $2, $3, $4, $5, $6, $7)
     RETURNING *`,
    [type, name, description, value, stock, probability, isActive ?? true]
  );

  res.status(201).json({
    success: true,
    message: 'Prix créé avec succès',
    data: result.rows[0],
  });
});

/**
 * Mettre à jour un prix
 * PUT /api/admin/prizes/:id
 */
export const updatePrize = asyncHandler(async (req, res, next) => {
  const { id } = req.params;
  const { name, description, value, stock, probability, isActive } = req.body;

  // Construire la requête dynamiquement
  const updates = [];
  const values = [];
  let paramCount = 1;

  if (name !== undefined) {
    updates.push(`name = $${paramCount++}`);
    values.push(name);
  }
  if (description !== undefined) {
    updates.push(`description = $${paramCount++}`);
    values.push(description);
  }
  if (value !== undefined) {
    updates.push(`value = $${paramCount++}`);
    values.push(value);
  }
  if (stock !== undefined) {
    updates.push(`stock = $${paramCount++}`);
    values.push(stock);
  }
  if (probability !== undefined) {
    updates.push(`probability = $${paramCount++}`);
    values.push(probability);
  }
  if (isActive !== undefined) {
    updates.push(`is_active = $${paramCount++}`);
    values.push(isActive);
  }

  if (updates.length === 0) {
    return next(new AppError('Aucune modification à apporter', 400));
  }

  values.push(id);

  const query = `
    UPDATE prizes
    SET ${updates.join(', ')}
    WHERE id = $${paramCount}
    RETURNING *
  `;

  const result = await pool.query(query, values);

  if (result.rows.length === 0) {
    return next(new AppError('Prix non trouvé', 404));
  }

  res.json({
    success: true,
    message: 'Prix mis à jour avec succès',
    data: result.rows[0],
  });
});

/**
 * Supprimer un prix (désactiver plutôt que supprimer)
 * DELETE /api/admin/prizes/:id
 */
export const deletePrize = asyncHandler(async (req, res, next) => {
  const { id } = req.params;

  // Désactiver le prix plutôt que le supprimer pour garder l'historique
  const result = await pool.query(
    'UPDATE prizes SET is_active = FALSE WHERE id = $1 RETURNING *',
    [id]
  );

  if (result.rows.length === 0) {
    return next(new AppError('Prix non trouvé', 404));
  }

  res.json({
    success: true,
    message: 'Prix désactivé avec succès',
  });
});

// ============================================
// GESTION DES UTILISATEURS
// ============================================

/**
 * Récupérer tous les utilisateurs
 * GET /api/admin/users
 */
export const getAllUsers = asyncHandler(async (req, res) => {
  const { page = 1, limit = 10, role, isActive } = req.query;
  const offset = (page - 1) * limit;

  // Construction de la requête avec filtrage optionnel
  let queryText = `
    SELECT
      u.id,
      u.email,
      u.first_name,
      u.last_name,
      u.phone,
      u.role,
      u.is_verified,
      u.is_active,
      u.created_at,
      COUNT(t.id) as tickets_count
    FROM users u
    LEFT JOIN tickets t ON u.id = t.user_id
  `;

  const queryParams = [];
  const whereClauses = [];
  let paramIndex = 1;

  // Ajouter le filtre par rôle si présent
  if (role) {
    whereClauses.push(`u.role = $${paramIndex}`);
    queryParams.push(role);
    paramIndex++;
  }

  // Ajouter le filtre par statut actif si présent
  if (isActive !== undefined) {
    whereClauses.push(`u.is_active = $${paramIndex}`);
    queryParams.push(isActive === 'true');
    paramIndex++;
  }

  if (whereClauses.length > 0) {
    queryText += ` WHERE ${whereClauses.join(' AND ')}`;
  }

  queryText += ` GROUP BY u.id ORDER BY u.created_at DESC LIMIT $${paramIndex} OFFSET $${paramIndex + 1}`;
  queryParams.push(limit, offset);

  const result = await pool.query(queryText, queryParams);

  // Compter le total avec les mêmes filtres
  let countQuery = 'SELECT COUNT(*) FROM users';
  const countWhereClauses = [];
  let countParams = [];
  let countParamIndex = 1;

  if (role) {
    countWhereClauses.push(`role = $${countParamIndex}`);
    countParams.push(role);
    countParamIndex++;
  }

  if (isActive !== undefined) {
    countWhereClauses.push(`is_active = $${countParamIndex}`);
    countParams.push(isActive === 'true');
    countParamIndex++;
  }

  if (countWhereClauses.length > 0) {
    countQuery += ` WHERE ${countWhereClauses.join(' AND ')}`;
  }

  const countResult = await pool.query(countQuery, countParams);
  const total = parseInt(countResult.rows[0].count);

  res.json({
    success: true,
    data: {
      users: result.rows,
      pagination: {
        total,
        page: parseInt(page),
        limit: parseInt(limit),
        totalPages: Math.ceil(total / limit),
      },
    },
  });
});

/**
 * Créer un employé
 * POST /api/admin/employees
 */
export const createEmployee = asyncHandler(async (req, res, next) => {
  const { email, password, firstName, lastName, phone } = req.body;

  // Vérifier si l'email existe déjà
  const existingUser = await pool.query('SELECT id FROM users WHERE email = $1', [email]);

  if (existingUser.rows.length > 0) {
    return next(new AppError('Cet email est déjà utilisé', 400));
  }

  // Hasher le mot de passe
  const hashedPassword = await bcrypt.hash(password, 10);

  // Créer l'employé
  const result = await pool.query(
    `INSERT INTO users (email, password, first_name, last_name, phone, role, is_verified)
     VALUES ($1, $2, $3, $4, $5, 'EMPLOYEE', TRUE)
     RETURNING id, email, first_name, last_name, role, created_at`,
    [email, hashedPassword, firstName, lastName, phone]
  );

  res.status(201).json({
    success: true,
    message: 'Employé créé avec succès',
    data: result.rows[0],
  });
});

/**
 * Récupérer un utilisateur par ID
 * GET /api/admin/users/:id
 */
export const getUserById = asyncHandler(async (req, res, next) => {
  const { id } = req.params;

  const result = await pool.query(
    `SELECT
      u.id,
      u.email,
      u.first_name,
      u.last_name,
      u.phone,
      u.address,
      u.city,
      u.postal_code,
      u.role,
      u.is_verified,
      u.is_active,
      u.created_at,
      u.date_of_birth,
      u.gender,
      COUNT(t.id) as tickets_count,
      COUNT(CASE WHEN t.status = 'PENDING' THEN 1 END) as pending_tickets,
      COUNT(CASE WHEN t.status = 'CLAIMED' THEN 1 END) as claimed_tickets
    FROM users u
    LEFT JOIN tickets t ON u.id = t.user_id
    WHERE u.id = $1
    GROUP BY u.id`,
    [id]
  );

  if (result.rows.length === 0) {
    return next(new AppError('Utilisateur non trouvé', 404));
  }

  res.json({
    success: true,
    data: result.rows[0],
  });
});

/**
 * Mettre à jour un utilisateur
 * PUT /api/admin/users/:id
 */
export const updateUser = asyncHandler(async (req, res, next) => {
  const { id } = req.params;
  const { role, isVerified, isActive } = req.body;

  // Construire la requête dynamiquement
  const updates = [];
  const values = [];
  let paramCount = 1;

  if (role !== undefined) {
    updates.push(`role = $${paramCount++}`);
    values.push(role);
  }
  if (isVerified !== undefined) {
    updates.push(`is_verified = $${paramCount++}`);
    values.push(isVerified);
  }
  if (isActive !== undefined) {
    updates.push(`is_active = $${paramCount++}`);
    values.push(isActive);
  }

  if (updates.length === 0) {
    return next(new AppError('Aucune modification à apporter', 400));
  }

  values.push(id);

  const query = `
    UPDATE users
    SET ${updates.join(', ')}
    WHERE id = $${paramCount}
    RETURNING id, email, first_name, last_name, role, is_verified, is_active
  `;

  const result = await pool.query(query, values);

  if (result.rows.length === 0) {
    return next(new AppError('Utilisateur non trouvé', 404));
  }

  res.json({
    success: true,
    message: 'Utilisateur mis à jour avec succès',
    data: result.rows[0],
  });
});

/**
 * Supprimer un utilisateur
 * DELETE /api/admin/users/:id
 */
export const deleteUser = asyncHandler(async (req, res, next) => {
  const { id } = req.params;

  // Ne pas permettre de supprimer son propre compte
  if (id === req.user.id) {
    return next(new AppError('Vous ne pouvez pas supprimer votre propre compte', 400));
  }

  const result = await pool.query('DELETE FROM users WHERE id = $1 RETURNING id', [id]);

  if (result.rows.length === 0) {
    return next(new AppError('Utilisateur non trouvé', 404));
  }

  res.json({
    success: true,
    message: 'Utilisateur supprimé avec succès',
  });
});

// ============================================
// GESTION DES TICKETS
// ============================================

/**
 * Récupérer tous les tickets
 * GET /api/admin/tickets
 */
export const getAllTickets = asyncHandler(async (req, res) => {
  console.log('🚀 getAllTickets appelé avec query:', req.query);
  const { page = 1, limit = 20, status, prizeType } = req.query;
  const offset = (page - 1) * limit;
  console.log('📋 Paramètres extraits:', { page, limit, status, prizeType, offset });

  let query = `
    SELECT
      t.id,
      t.code,
      t.status,
      t.played_at,
      t.claimed_at,
      t.validated_at,
      t.created_at,
      u.email as user_email,
      u.first_name || ' ' || u.last_name as user_name,
      p.name as prize_name,
      p.type as prize_type,
      p.value as prize_value,
      v.first_name || ' ' || v.last_name as validated_by_name
    FROM tickets t
    LEFT JOIN users u ON t.user_id = u.id
    LEFT JOIN prizes p ON t.prize_id = p.id
    LEFT JOIN users v ON t.validated_by = v.id
  `;

  const params = [];
  let paramCount = 1;
  const whereClauses = [];

  // Filtre par statut
  if (status) {
    whereClauses.push(`t.status = $${paramCount++}`);
    params.push(status);
  }

  // Filtre par type de lot
  if (prizeType) {
    whereClauses.push(`p.type = $${paramCount++}`);
    params.push(prizeType);
  }

  // Ajouter les clauses WHERE si nécessaire
  if (whereClauses.length > 0) {
    query += ' WHERE ' + whereClauses.join(' AND ');
  }

  query += ` ORDER BY t.played_at DESC NULLS LAST, t.created_at DESC LIMIT $${paramCount++} OFFSET $${paramCount}`;
  params.push(limit, offset);

  // Log pour debug
  console.log('🔍 SQL Query:', query);
  console.log('🔍 Params:', params);

  const result = await pool.query(query, params);

  console.log('✅ Résultats:', result.rows.length, 'tickets');
  if (result.rows.length > 0) {
    console.log('📦 Premier ticket:', { code: result.rows[0].code, prize: result.rows[0].prize_name, type: result.rows[0].prize_type });
  }

  // Compter le total
  let countQuery = 'SELECT COUNT(*) FROM tickets t LEFT JOIN prizes p ON t.prize_id = p.id';
  const countParams = [];
  const countWhereClauses = [];
  let countParamCount = 1;

  if (status) {
    countWhereClauses.push(`t.status = $${countParamCount++}`);
    countParams.push(status);
  }

  if (prizeType) {
    countWhereClauses.push(`p.type = $${countParamCount++}`);
    countParams.push(prizeType);
  }

  if (countWhereClauses.length > 0) {
    countQuery += ' WHERE ' + countWhereClauses.join(' AND ');
  }

  const countResult = await pool.query(countQuery, countParams);
  const total = parseInt(countResult.rows[0].count);

  // Récupérer les stats globales (tous les tickets, sans pagination)
  const statsQuery = `
    SELECT
      COUNT(*) FILTER (WHERE status = 'PENDING') as pending,
      COUNT(*) FILTER (WHERE status = 'CLAIMED') as claimed,
      COUNT(*) FILTER (WHERE status = 'REJECTED') as rejected
    FROM tickets
  `;
  const statsResult = await pool.query(statsQuery);
  const stats = {
    pending: parseInt(statsResult.rows[0].pending) || 0,
    claimed: parseInt(statsResult.rows[0].claimed) || 0,
    rejected: parseInt(statsResult.rows[0].rejected) || 0,
  };
  console.log('📊 Stats calculées:', stats);

  res.json({
    success: true,
    data: result.rows,
    total,
    page: parseInt(page),
    limit: parseInt(limit),
    totalPages: Math.ceil(total / limit),
    stats,
  });
});

// ============================================
// GÉNÉRATION DE TICKETS EN MASSE
// ============================================

/**
 * Générer des tickets en masse
 * POST /api/admin/generate-tickets
 */
export const generateTickets = asyncHandler(async (req, res) => {
  const { quantity } = req.body;

  if (!quantity || quantity < 1 || quantity > 1000000) {
    throw new AppError('La quantité doit être entre 1 et 1,000,000', 400);
  }

  // Récupérer tous les lots actifs avec leurs probabilités
  const prizesResult = await pool.query(
    `SELECT id, name, probability, stock
     FROM prizes
     WHERE is_active = TRUE AND stock > 0
     ORDER BY probability DESC`
  );

  const prizes = prizesResult.rows;

  if (prizes.length === 0) {
    throw new AppError('Aucun lot actif avec du stock disponible', 400);
  }

  // Calculer la somme totale des probabilités
  const totalProbability = prizes.reduce((sum, prize) => sum + parseFloat(prize.probability), 0);

  if (totalProbability === 0) {
    throw new AppError('La somme des probabilités est 0', 400);
  }

  // Générer les tickets
  const tickets = [];
  const codes = new Set();

  console.log(`🎫 Génération de ${quantity} tickets...`);

  for (let i = 0; i < quantity; i++) {
    // Générer un code unique
    let code;
    do {
      code = generateTicketCode();
    } while (codes.has(code));
    codes.add(code);

    // Sélectionner un lot selon la probabilité
    const random = Math.random() * totalProbability;
    let cumulativeProbability = 0;
    let selectedPrize = prizes[0];

    for (const prize of prizes) {
      cumulativeProbability += parseFloat(prize.probability);
      if (random <= cumulativeProbability) {
        selectedPrize = prize;
        break;
      }
    }

    tickets.push({
      code,
      prizeId: selectedPrize.id,
    });

    // Log de progression tous les 10000 tickets
    if ((i + 1) % 10000 === 0) {
      console.log(`  ✓ ${i + 1}/${quantity} tickets générés`);
    }
  }

  console.log(`📊 Insertion de ${tickets.length} tickets dans la base de données...`);

  // Insérer les tickets en batch (par lots de 1000 pour éviter les problèmes de mémoire)
  const batchSize = 1000;
  let inserted = 0;

  for (let i = 0; i < tickets.length; i += batchSize) {
    const batch = tickets.slice(i, i + batchSize);

    // Construire la requête d'insertion
    const values = batch.map((t, idx) => {
      return `($${idx * 2 + 1}, $${idx * 2 + 2})`;
    }).join(', ');

    const params = batch.flatMap(t => [t.code, t.prizeId]);

    await pool.query(
      `INSERT INTO tickets (code, prize_id) VALUES ${values}`,
      params
    );

    inserted += batch.length;
    console.log(`  ✓ ${inserted}/${tickets.length} tickets insérés`);
  }

  console.log(`✅ ${inserted} tickets générés avec succès!`);

  res.json({
    success: true,
    message: `${inserted} tickets générés avec succès`,
    data: {
      generated: inserted,
    },
  });
});

/**
 * Générer un code ticket aléatoire unique
 */
function generateTicketCode() {
  const chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789'; // Sans I, O, 0, 1 pour éviter confusion
  let code = '';
  for (let i = 0; i < 10; i++) {
    code += chars.charAt(Math.floor(Math.random() * chars.length));
  }
  return code;
}

/**
 * Exporter les données marketing pour emailing
 * GET /api/admin/marketing/export
 */
export const exportMarketingData = asyncHandler(async (req, res) => {
  const { segment } = req.query;

  // Construction de la requête selon le segment
  let whereClause = "WHERE u.role = 'CLIENT'";

  if (segment === 'active') {
    // Utilisateurs qui ont joué au moins 1 ticket
    whereClause += " AND (SELECT COUNT(*) FROM tickets t WHERE t.user_id = u.id AND t.played_at IS NOT NULL) > 0";
  } else if (segment === 'winners') {
    // Utilisateurs qui ont gagné au moins 1 lot
    whereClause += " AND (SELECT COUNT(*) FROM tickets t WHERE t.user_id = u.id AND t.status = 'CLAIMED') > 0";
  } else if (segment === 'verified') {
    // Utilisateurs vérifiés uniquement
    whereClause += " AND u.is_verified = TRUE";
  }

  const query = `
    SELECT
      u.id,
      u.email,
      u.first_name,
      u.last_name,
      u.phone,
      u.city,
      u.postal_code,
      u.gender,
      u.date_of_birth,
      u.is_verified,
      u.created_at,
      COALESCE(COUNT(DISTINCT t.id), 0) as tickets_played,
      COALESCE(COUNT(DISTINCT CASE WHEN t.status = 'CLAIMED' THEN t.id END), 0) as prizes_won,
      COALESCE(MAX(t.played_at), NULL) as last_activity
    FROM users u
    LEFT JOIN tickets t ON u.id = t.user_id AND t.played_at IS NOT NULL
    ${whereClause}
    GROUP BY u.id, u.email, u.first_name, u.last_name, u.phone, u.city,
             u.postal_code, u.gender, u.date_of_birth, u.is_verified, u.created_at
    ORDER BY u.created_at DESC
  `;

  const result = await pool.query(query);

  res.json({
    success: true,
    data: {
      users: result.rows,
      total: result.rows.length,
      segment: segment || 'all',
      exportedAt: new Date().toISOString(),
    },
  });
});

export default {
  getStatistics,
  getAllPrizes,
  createPrize,
  updatePrize,
  deletePrize,
  getAllUsers,
  getUserById,
  createEmployee,
  updateUser,
  deleteUser,
  getAllTickets,
  generateTickets,
  exportMarketingData,
};