package db

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"gestion/models"
	"log"
	"strings"
)

func (d *Database) CreateClient(client *models.Client) error {
	query := `INSERT INTO clients (username, password, nom, prenom, telephone, command, amende, must_change_password, created_at)
	          VALUES ($1, $2, $3, $4, $5, 0, 0.0, $6, CURRENT_TIMESTAMP)
	          RETURNING id, created_at`

	err := d.QueryRow(query, client.Username, client.Password, client.Nom, client.Prenom, client.Telephone, client.MustChangePassword).Scan(
		&client.ID,
		&client.CreatedAt,
	)
	if err != nil {
		return fmt.Errorf("erreur lors de la création du client: %w", err)
	}

	log.Printf("✅ Client créé avec succès: %s %s (ID: %d)", client.Prenom, client.Nom, client.ID)
	return nil
}

// GetClientByID récupère un client par son ID
func (d *Database) GetClientByID(id int) (*models.Client, error) {
	var client models.Client
	query := `SELECT id, username, password, nom, prenom, telephone, command, amende, COALESCE(points_extra, '{}'::jsonb), created_at
	          FROM clients WHERE id = $1`

	var pointsExtraJSON []byte
	err := d.QueryRow(query, id).Scan(
		&client.ID,
		&client.Username,
		&client.Password,
		&client.Nom,
		&client.Prenom,
		&client.Telephone,
		&client.Command,
		&client.Amende,
		&pointsExtraJSON,
		&client.CreatedAt,
	)

	if err == sql.ErrNoRows {
		return nil, fmt.Errorf("client non trouvé")
	}
	if err != nil {
		return nil, fmt.Errorf("erreur lors de la récupération du client: %w", err)
	}

	if len(pointsExtraJSON) > 0 {
		json.Unmarshal(pointsExtraJSON, &client.PointsExtra)
	}

	return &client, nil
}

// GetAllClients récupère tous les clients
func (d *Database) GetAllClients() ([]*models.Client, error) {
	query := `SELECT id, username, password, nom, prenom, telephone, command, amende, referral_balance, COALESCE(points_extra, '{}'::jsonb), created_at
	          FROM clients ORDER BY created_at DESC`

	rows, err := d.Query(query)
	if err != nil {
		return nil, fmt.Errorf("erreur lors de la récupération des clients: %w", err)
	}
	defer rows.Close()

	var clients []*models.Client
	for rows.Next() {
		client := &models.Client{}
		var pointsExtraJSON []byte
		err := rows.Scan(
			&client.ID,
			&client.Username,
			&client.Password,
			&client.Nom,
			&client.Prenom,
			&client.Telephone,
			&client.Command,
			&client.Amende,
			&client.ReferralBalance,
			&pointsExtraJSON,
			&client.CreatedAt,
		)
		if err != nil {
			return nil, fmt.Errorf("erreur lors du scan du client: %w", err)
		}
		client.PointsExtra = map[string]int{}
		if len(pointsExtraJSON) > 0 {
			json.Unmarshal(pointsExtraJSON, &client.PointsExtra)
		}
		clients = append(clients, client)
	}

	if err = rows.Err(); err != nil {
		return nil, fmt.Errorf("erreur lors de l'itération des résultats: %w", err)
	}

	return clients, nil
}

// UpdateClient met à jour un client existant
func (d *Database) UpdateClient(client *models.Client) error {
	query := `UPDATE clients
	          SET username = $1, password = $2, nom = $3, prenom = $4, telephone = $5,
	              command = $6, amende = $7
	          WHERE id = $8`

	result, err := d.Exec(query,
		client.Username,
		client.Password,
		client.Nom,
		client.Prenom,
		client.Telephone,
		client.Command,
		client.Amende,
		client.ID,
	)
	if err != nil {
		return fmt.Errorf("erreur lors de la mise à jour du client: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur lors de la vérification des lignes affectées: %w", err)
	}

	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	return nil
}

// DeleteClient supprime un client
func (d *Database) DeleteClient(id int) error {
	_ = d.RevokeAllUserTokens(id, "client")

	query := `DELETE FROM clients WHERE id = $1`

	result, err := d.Exec(query, id)
	if err != nil {
		return fmt.Errorf("erreur lors de la suppression du client: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur lors de la vérification des lignes affectées: %w", err)
	}

	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	return nil
}

// UpdateClientPassword met à jour le mot de passe d'un client
func (d *Database) UpdateClientPassword(clientID int, hashedPassword string) error {
	query := `UPDATE clients SET password = $1 WHERE id = $2`

	result, err := d.Exec(query, hashedPassword, clientID)
	if err != nil {
		return fmt.Errorf("erreur lors de la mise à jour du mot de passe: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur lors de la vérification: %w", err)
	}

	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	return nil
}

// UpdateClientPasswordAndClearFlag met à jour le mot de passe et remet must_change_password à false
func (d *Database) UpdateClientPasswordAndClearFlag(clientID int, hashedPassword string) error {
	query := `UPDATE clients SET password = $1, must_change_password = FALSE, updated_at = CURRENT_TIMESTAMP WHERE id = $2`

	result, err := d.Exec(query, hashedPassword, clientID)
	if err != nil {
		return fmt.Errorf("erreur lors de la mise à jour du mot de passe: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur lors de la vérification: %w", err)
	}

	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	return nil
}

// GetClientStats récupère les statistiques d'un client
func (d *Database) GetClientStats(clientID int) (map[string]interface{}, error) {
	client, err := d.GetClientByID(clientID)
	if err != nil {
		return nil, err
	}

	// Compter les commandes du client
	var totalCommands, pendingCommands, completedCommands int

	countQuery := `SELECT
		COUNT(*) as total,
		SUM(CASE WHEN status = 'pending' OR status = 'livre' THEN 1 ELSE 0 END) as pending,
		SUM(CASE WHEN status = 'approved' THEN 1 ELSE 0 END) as completed
		FROM commandes WHERE username = $1`

	err = d.QueryRow(countQuery, client.Username).Scan(&totalCommands, &pendingCommands, &completedCommands)
	if err != nil {
		log.Printf("⚠️  Erreur calcul stats: %v", err)
		totalCommands, pendingCommands, completedCommands = 0, 0, 0
	}

	stats := map[string]interface{}{
		"id":                 clientID,
		"username":           client.Username,
		"nom":                client.Nom,
		"prenom":             client.Prenom,
		"telephone":          client.Telephone,
		"total_commands":     totalCommands,
		"pending_commands":   pendingCommands,
		"completed_commands": completedCommands,
		"points_extra":       client.PointsExtra,
		"amende":             client.Amende,
		"member_since":       client.CreatedAt,
	}

	return stats, nil
}

func (d *Database) GetClientAmende(username string) (float64, error) {
	var amende float64
	query := `SELECT COALESCE(amende, 0) FROM clients WHERE username = $1`

	err := d.QueryRow(query, username).Scan(&amende)
	if err != nil {
		log.Printf("❌ [GetClientAmende] Erreur pour %s: %v", username, err)
		return 0, fmt.Errorf("erreur récupération pénalités: %w", err)
	}

	log.Printf("💰 [GetClientAmende] Client %s: %.2f points", username, amende)
	return amende, nil
}

func (d *Database) PayClientPenalties(username string, amountPaid float64) error {
	log.Printf("💳 [PayClientPenalties] Paiement de %.2f points pour %s", amountPaid, username)

	// Vérifier le montant actuel
	currentAmount, err := d.GetClientAmende(username)
	if err != nil {
		return err
	}

	if currentAmount <= 0 {
		return fmt.Errorf("aucune pénalité à payer")
	}

	if amountPaid < currentAmount {
		return fmt.Errorf("montant insuffisant: %.2f payé, %.2f requis", amountPaid, currentAmount)
	}

	query := `UPDATE clients
	          SET amende = 0, updated_at = CURRENT_TIMESTAMP
	          WHERE username = $1`

	result, err := d.Exec(query, username)
	if err != nil {
		log.Printf("❌ [PayClientPenalties] Erreur UPDATE: %v", err)
		return fmt.Errorf("erreur paiement pénalités: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur vérification: %w", err)
	}
	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	cacheKey := fmt.Sprintf("client:%s", username)
	Redis.Del(RedisCtx, cacheKey)

	return nil
}

// IncrementClientCommandCount incrémente le compteur de commandes du client
func (d *Database) IncrementClientCommandCount(username string) error {
	query := `UPDATE clients
	          SET command = command + 1
	          WHERE username = $1`

	result, err := d.Exec(query, username)
	if err != nil {
		return fmt.Errorf("erreur lors de l'incrémentation du compteur: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur lors de la vérification: %w", err)
	}
	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	return nil
}

func (d *Database) AddClientPointsByCategory(username string, points int, poolKey string) error {
	if poolKey == "" {
		poolKey = "pool_0"
	}
	result, err := d.Exec(`
		UPDATE clients
		SET points_extra = jsonb_set(
			COALESCE(points_extra, '{}'::jsonb),
			ARRAY[$2],
			to_jsonb(COALESCE((points_extra->>$2)::int, 0) + $3)
		), updated_at = CURRENT_TIMESTAMP
		WHERE username = $1
	`, username, poolKey, points)
	if err != nil {
		return fmt.Errorf("erreur lors de l'ajout de points: %w", err)
	}
	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur lors de la vérification: %w", err)
	}
	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}
	log.Printf("✅ %d points (key=%s) ajoutés au client %s", points, poolKey, username)
	return nil
}

func (d *Database) CalculateAndAddPointsForCommand(commandID int, username string) (int, error) {
	tx, err := d.Begin()
	if err != nil {
		return 0, fmt.Errorf("erreur transaction: %w", err)
	}
	defer tx.Rollback()

	points, _, err := d.CalculateAndAddPointsForCommandTx(tx, commandID, username)
	if err != nil {
		return 0, err
	}

	if err := tx.Commit(); err != nil {
		return 0, fmt.Errorf("erreur commit: %w", err)
	}
	return points, nil
}

func (d *Database) GetClientByTelephone(telephone string) (*models.Client, error) {
	client := &models.Client{}
	query := `SELECT id, username, password, nom, prenom, telephone, command, amende, created_at
	          FROM clients WHERE telephone = $1`

	err := d.QueryRow(query, telephone).Scan(
		&client.ID,
		&client.Username,
		&client.Password,
		&client.Nom,
		&client.Prenom,
		&client.Telephone,
		&client.Command,
		&client.Amende,
		&client.CreatedAt,
	)

	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, fmt.Errorf("erreur lors de la récupération du client: %w", err)
	}

	return client, nil
}

// GetClientByUsername récupère un client par son username
func (d *Database) GetClientByUsername(username string) (*models.Client, error) {
	client := &models.Client{}
	var pointsExtraJSON []byte
	query := `SELECT id, username, password, nom, prenom, telephone, command, amende, must_change_password, COALESCE(points_extra, '{}'::jsonb), created_at
	          FROM clients WHERE username = $1`

	err := d.QueryRow(query, username).Scan(
		&client.ID,
		&client.Username,
		&client.Password,
		&client.Nom,
		&client.Prenom,
		&client.Telephone,
		&client.Command,
		&client.Amende,
		&client.MustChangePassword,
		&pointsExtraJSON,
		&client.CreatedAt,
	)

	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, fmt.Errorf("erreur lors de la récupération du client: %w", err)
	}

	client.PointsExtra = map[string]int{}
	if len(pointsExtraJSON) > 0 {
		json.Unmarshal(pointsExtraJSON, &client.PointsExtra)
	}

	return client, nil
}

func (d *Database) GetClientPenaltiesInfo(username string) (map[string]interface{}, error) {
	// Récupérer le montant des pénalités
	amende, err := d.GetClientAmende(username)
	if err != nil {
		return nil, err
	}

	// Récupérer le nombre d'annulations
	cancellationsCount, err := d.GetClientCancellationsCount(username)
	if err != nil {
		log.Printf("⚠️ [GetClientPenaltiesInfo] Erreur récup annulations: %v", err)
		cancellationsCount = 0
	}

	// Récupérer l'historique d'annulations
	cancellationHistory, err := d.GetClientCancellationHistory(username)
	if err != nil {
		log.Printf("⚠️ [GetClientPenaltiesInfo] Erreur récup historique: %v", err)
		cancellationHistory = map[string]interface{}{
			"cancellations_count": cancellationsCount,
			"next_penalty":        20,
		}
	}

	info := map[string]interface{}{
		"username":             username,
		"total_penalty":        amende,
		"cancellations_count":  cancellationsCount,
		"cancellation_history": cancellationHistory,
		"has_penalties":        amende > 0,
	}

	return info, nil
}

// CheckClientCanOrder vérifie si un client peut passer commande (pas de pénalités impayées)
func (d *Database) CheckClientCanOrder(username string) (bool, float64, error) {
	amende, err := d.GetClientAmende(username)
	if err != nil {
		return false, 0, err
	}

	if amende > 0 {
		log.Printf("⚠️ [CheckClientCanOrder] Client %s bloqué: %.2f points de pénalités", username, amende)
		return false, amende, fmt.Errorf("pénalités impayées: %.2f points", amende)
	}

	return true, 0, nil
}

// ResetClientPoint réinitialise les points d'un client.
// extraPoolKey != "" → reset points_extra[extraPoolKey] uniquement
// extraPoolKey == "" (poolIdx=-1) → reset total points_extra
func (d *Database) ResetClientPoint(username string, poolIdx int, extraPoolKey string) error {
	var query string
	switch {
	case extraPoolKey != "":
		_, err := d.Exec(
			`UPDATE clients SET points_extra = points_extra - $2, updated_at = CURRENT_TIMESTAMP WHERE username = $1`,
			username, extraPoolKey,
		)
		if err != nil {
			log.Printf("❌ [ResetClientPointAdmin] Erreur UPDATE extra: %v", err)
		} else {
			cacheKey := fmt.Sprintf("client:%s", username)
			Redis.Del(RedisCtx, cacheKey)
		}
		return err
	default: // -1 ou poolIdx sans clé → reset total
		query = `UPDATE clients SET points_extra = '{}'::jsonb, updated_at = CURRENT_TIMESTAMP WHERE username = $1`
	}

	result, err := d.Exec(query, username)
	if err != nil {
		log.Printf("❌ [ResetClientPointAdmin] Erreur UPDATE: %v", err)
		return fmt.Errorf("erreur reset points: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur vérification: %w", err)
	}
	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	// Invalider le cache Redis du client
	cacheKey := fmt.Sprintf("client:%s", username)
	Redis.Del(RedisCtx, cacheKey)

	return nil
}

func (d *Database) ResetClientPenalties(username string, resetCancellationsCount bool) error {
	log.Printf("🔄 [ResetClientPenalties] Reset pour %s (reset_count=%v)", username, resetCancellationsCount)

	var query string
	if resetCancellationsCount {
		query = `UPDATE clients
		         SET amende = 0,
		             cancellations_count = 0,
		             updated_at = CURRENT_TIMESTAMP
		         WHERE username = $1`
	} else {
		query = `UPDATE clients
		         SET amende = 0,
		             updated_at = CURRENT_TIMESTAMP
		         WHERE username = $1`
	}

	result, err := d.Exec(query, username)
	if err != nil {
		log.Printf("❌ [ResetClientPenalties] Erreur UPDATE: %v", err)
		return fmt.Errorf("erreur reset pénalités: %w", err)
	}

	rowsAffected, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf("erreur vérification: %w", err)
	}
	if rowsAffected == 0 {
		return fmt.Errorf("client non trouvé")
	}

	// Invalider le cache Redis du client
	cacheKey := fmt.Sprintf("client:%s", username)
	Redis.Del(RedisCtx, cacheKey)

	return nil
}

func (d *Database) GetAllClientsWithPenalties() ([]map[string]interface{}, error) {
	query := `
		SELECT username, amende, COALESCE(cancellations_count, 0) as cancellations_count, updated_at
		FROM clients
		WHERE amende > 0
		ORDER BY amende DESC
	`

	rows, err := d.Query(query)
	if err != nil {
		log.Printf("❌ [GetAllClientsWithPenalties] Erreur query: %v", err)
		return nil, fmt.Errorf("erreur récupération clients: %w", err)
	}
	defer rows.Close()

	var clients []map[string]interface{}
	for rows.Next() {
		var username string
		var amende float64
		var cancellationsCount int
		var updatedAt interface{}

		err := rows.Scan(&username, &amende, &cancellationsCount, &updatedAt)
		if err != nil {
			log.Printf("⚠️ [GetAllClientsWithPenalties] Erreur scan: %v", err)
			continue
		}

		clients = append(clients, map[string]interface{}{
			"username":            username,
			"total_penalty":       amende,
			"cancellations_count": cancellationsCount,
			"last_updated":        updatedAt,
		})
	}

	log.Printf("📊 [GetAllClientsWithPenalties] %d clients avec pénalités", len(clients))

	return clients, nil
}

func (d *Database) GetClientPenaltiesStats() (map[string]interface{}, error) {
	query := `
		SELECT
			COUNT(CASE WHEN amende > 0 THEN 1 END) as clients_with_penalties,
			COALESCE(SUM(amende), 0) as total_penalties,
			COALESCE(AVG(amende), 0) as avg_penalty,
			COALESCE(MAX(amende), 0) as max_penalty,
			COUNT(*) as total_clients
		FROM clients
	`

	var stats struct {
		ClientsWithPenalties int
		TotalPenalties       float64
		AvgPenalty           float64
		MaxPenalty           float64
		TotalClients         int
	}

	err := d.QueryRow(query).Scan(
		&stats.ClientsWithPenalties,
		&stats.TotalPenalties,
		&stats.AvgPenalty,
		&stats.MaxPenalty,
		&stats.TotalClients,
	)
	if err != nil {
		log.Printf("❌ [GetClientPenaltiesStats] Erreur: %v", err)
		return nil, fmt.Errorf("erreur récupération stats: %w", err)
	}

	result := map[string]interface{}{
		"clients_with_penalties": stats.ClientsWithPenalties,
		"total_penalties":        stats.TotalPenalties,
		"average_penalty":        stats.AvgPenalty,
		"max_penalty":            stats.MaxPenalty,
		"total_clients":          stats.TotalClients,
	}

	log.Printf("📊 [GetClientPenaltiesStats] Stats: %d/%d clients avec pénalités",
		stats.ClientsWithPenalties, stats.TotalClients)

	return result, nil
}

func (d *Database) CalculateAndAddPointsForCommandTx(tx *sql.Tx, commandID int, username string) (int, string, error) {
	log.Printf("💰 [CalcPointsTx] START - cmd=%d, user=%s", commandID, username)

	// Charger les paramètres globaux
	settings, err := d.GetSettings()
	if err != nil {
		log.Printf("⚠️ [CalcPointsTx] Erreur lecture settings, utilisation des défauts: %v", err)
		settings = DefaultSettings()
	}

	pools := settings.PointsPools
	if len(pools) == 0 {
		log.Printf("ℹ️ [CalcPointsTx] Aucun pool configuré → 0 points")
		return 0, "", nil
	}

	// Construire la map catégorie → index de pool
	catToPool := make(map[string]int)
	for i, pool := range pools {
		for _, cat := range pool.Categories {
			catToPool[strings.ToLower(cat)] = i
		}
	}

	if len(catToPool) == 0 {
		log.Printf("ℹ️ [CalcPointsTx] Aucune catégorie assignée aux pools → 0 points")
		return 0, "", nil
	}

	// ✅ ÉTAPE 1: Récupérer tous les items de la commande avec leurs catégories
	rows, err := tx.Query(`
		SELECT ci.quantite, ci.prix, COALESCE(p.category, '') as category
		FROM command_items ci
		LEFT JOIN products p ON ci.product_id = p.id
		WHERE ci.command_id = $1
	`, commandID)
	if err != nil {
		log.Printf("❌ [CalcPointsTx] Erreur query items: %v", err)
		return 0, "", fmt.Errorf("erreur récupération items: %w", err)
	}
	defer rows.Close()

	var itemCount int
	poolTotals := make([]float64, len(pools))

	for rows.Next() {
		var quantite, prix float64
		var category string
		if err := rows.Scan(&quantite, &prix, &category); err != nil {
			log.Printf("❌ [CalcPointsTx] Erreur scan: %v", err)
			return 0, "", fmt.Errorf("erreur lecture item: %w", err)
		}
		itemCount++
		catLower := strings.ToLower(category)
		if poolIdx, ok := catToPool[catLower]; ok {
			poolTotals[poolIdx] += prix
		}
	}

	if err = rows.Err(); err != nil {
		log.Printf("❌ [CalcPointsTx] Erreur rows: %v", err)
		return 0, "", fmt.Errorf("erreur itération items: %w", err)
	}

	if itemCount == 0 {
		log.Printf("⚠️ [CalcPointsTx] Aucun item trouvé pour cmd %d", commandID)
		return 0, "", nil
	}

	for i, t := range poolTotals {
		log.Printf("📊 [CalcPointsTx] Pool[%d] (%s): %.2f€", i, pools[i].Name, t)
	}

	// ✅ ÉTAPE 2: Calculer les points pour tous les pools
	var totalPoints int
	var pointCategory string

	poolPts := make([]int, len(pools))
	var categoryParts []string
	for i, pool := range pools {
		poolPts[i] = CalcPointsFromTiers(poolTotals[i], pool.Tiers)
		totalPoints += poolPts[i]
		if poolPts[i] > 0 {
			categoryParts = append(categoryParts, pool.Name)
		}
	}

	log.Printf("💰 [CalcPointsTx] points par pool: %v, total=%d", poolPts, totalPoints)

	if totalPoints == 0 {
		return 0, "", nil
	}

	if len(categoryParts) > 0 {
		pointCategory = strings.Join(categoryParts, " & ")
	} else {
		pointCategory = "points"
	}

	for i, pool := range pools {
		if poolPts[i] == 0 {
			continue
		}
		_, err = tx.Exec(`
			UPDATE clients
			SET points_extra = jsonb_set(
				COALESCE(points_extra, '{}'::jsonb),
				ARRAY[$2],
				to_jsonb(COALESCE((points_extra->>$2)::int, 0) + $3)
			), updated_at = CURRENT_TIMESTAMP
			WHERE username = $1
		`, username, pool.Key, poolPts[i])
		if err != nil {
			log.Printf("❌ [CalcPointsTx] Erreur UPDATE points_extra pool[%d] (%s): %v", i, pool.Key, err)
			return 0, "", fmt.Errorf("erreur mise à jour points pool[%d]: %w", i, err)
		}
		log.Printf("💰 [CalcPointsTx] pool[%d] (%s / key=%s): +%d pts", i, pool.Name, pool.Key, poolPts[i])
	}

	log.Printf("🎉 [CalcPointsTx] SUCCÈS - %d points [%s] → %s", totalPoints, pointCategory, username)

	return totalPoints, pointCategory, nil
}

func (d *Database) CanUserAccessCommand(
	commandID int,
	username string,
	role string,
) (bool, error) {

	// 👑 Admin : accès total
	if role == "admin" {
		return true, nil
	}

	var exists bool

	// 🚚 Livreur : seulement commandes assignées
	if role == "livreur" {
		err := d.QueryRow(`
			SELECT EXISTS(
				SELECT 1 FROM commandes
				WHERE id = $1 AND livreur_assign = $2
			)
		`, commandID, username).Scan(&exists)
		return exists, err
	}

	// 👤 User : seulement SES commandes
	err := d.QueryRow(`
		SELECT EXISTS(
			SELECT 1 FROM commandes
			WHERE id = $1 AND username = $2
		)
	`, commandID, username).Scan(&exists)

	return exists, err
}