package db

import (
	"database/sql"
	"fmt"
	"gestion/models"
	"log"
	"slices"
	"strings"
	"time"
)

func sanitizeString(s string) string {
	sanitized := strings.Map(func(r rune) rune {
		if r < 32 || r == 127 {
			return -1
		}
		return r
	}, s)

	if len(sanitized) > 1000 {
		sanitized = sanitized[:1000]
	}

	return strings.TrimSpace(sanitized)
}

func validateAddress(address string) error {
	address = strings.TrimSpace(address)

	if address == "" {
		return fmt.Errorf("adresse vide non autorisée")
	}

	if len(address) > 500 {
		return fmt.Errorf("adresse trop longue (max 500 caractères)")
	}

	if strings.ContainsAny(address, "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x0B\x0C\x0E\x0F") {
		return fmt.Errorf("adresse contient des caractères de contrôle interdits")
	}

	return nil
}

type basketItem struct {
	ProductID int
	Quantity  float64
	Price     float64
}

func (d *Database) fetchBasketItems(username string) ([]basketItem, float64, error) {
	rows, err := d.Query(`SELECT product_id, quantity, price FROM baskets WHERE username = $1`, username)
	if err != nil {
		return nil, 0, fmt.Errorf("erreur récupération panier: %w", err)
	}
	defer rows.Close()

	var items []basketItem
	total := 0.0
	for rows.Next() {
		var item basketItem
		if err := rows.Scan(&item.ProductID, &item.Quantity, &item.Price); err != nil {
			return nil, 0, fmt.Errorf("erreur scan panier: %w", err)
		}
		items = append(items, item)
		total += item.Price
	}
	if err := rows.Err(); err != nil {
		return nil, 0, err
	}
	return items, total, nil
}

// validateCommandStatus vérifie si le statut est valide
func validateCommandStatus(status string) error {
	validStatuses := map[string]bool{
		"pending":   true,
		"assigned":  true,
		"en_route":  true,
		"arrived":   true,
		"livre":     true,
		"approved":  true,
		"cancelled": true,
		"disabled":  true,
	}

	if !validStatuses[status] {
		return fmt.Errorf("statut invalide: %s", status)
	}

	return nil
}

func (d *Database) CreateCommand(username string) (*models.Command, error) {
	var adresse string
	clientQuery := `SELECT username FROM clients WHERE username = $1`
	err := d.QueryRow(clientQuery, username).Scan(&adresse)
	if err != nil {
		adresse = "Adresse non spécifiée"
	}

	basketItems, totalPrix, err := d.fetchBasketItems(username)
	if err != nil {
		return nil, err
	}

	if len(basketItems) == 0 {
		return nil, fmt.Errorf("le panier est vide")
	}

	commandQuery := `INSERT INTO commandes (username, status, adresse, total_prix, created_at, updated_at)
	                 VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
	                 RETURNING id, created_at, updated_at`

	var commandID int
	var createdAt, updatedAt time.Time
	err = d.QueryRow(commandQuery, username, "pending", adresse, totalPrix).Scan(
		&commandID,
		&createdAt,
		&updatedAt,
	)
	if err != nil {
		return nil, fmt.Errorf("erreur lors de la création de la commande: %w", err)
	}

	for _, item := range basketItems {
		productName, err := d.GetProductNameByID(item.ProductID)
		if err != nil {
			productName = "Produit inconnu"
		}

		itemQuery := `INSERT INTO command_items (command_id, produit, product_id, quantite, prix)
		              VALUES ($1, $2, $3, $4, $5)`
		_, err = d.Exec(itemQuery, commandID, productName, item.ProductID, item.Quantity, item.Price)
		if err != nil {
			return nil, fmt.Errorf("erreur lors de l'insertion des items: %w", err)
		}
	}

	clearBasketQuery := `DELETE FROM baskets WHERE username = $1`
	_, err = d.Exec(clearBasketQuery, username)
	if err != nil {
		return nil, fmt.Errorf("erreur lors du vidage du panier: %w", err)
	}

	command := &models.Command{
		ID:     commandID,
		Status: "pending",
		Total:  totalPrix,
	}

	return command, nil
}

func (d *Database) CreateCommandWithAddress(username, deliveryAddress string) (*models.Command, error) {
	if err := validateUsername(username); err != nil {
		return nil, err
	}

	if err := validateAddress(deliveryAddress); err != nil {
		return nil, err
	}

	client, err := d.GetClientByUsername(username)
	if err != nil {
		log.Printf("⚠️ Client non trouvé: %v", err)
	}

	clientNom := ""
	clientPrenom := ""
	clientTelephone := ""
	if client != nil {
		clientNom = sanitizeString(client.Nom)
		clientPrenom = sanitizeString(client.Prenom)
		clientTelephone = sanitizeString(client.Telephone)
	}

	basketItems, totalPrix, err := d.fetchBasketItems(username)
	if err != nil {
		log.Printf("❌ Erreur query basket: %v", err)
		return nil, err
	}

	if len(basketItems) == 0 {
		return nil, fmt.Errorf("le panier est vide")
	}

	for _, item := range basketItems {
		if item.ProductID <= 0 || item.Quantity <= 0 || item.Price < 0 {
			return nil, fmt.Errorf("données panier invalides")
		}
	}

	if totalPrix <= 0 || totalPrix > 100000 {
		return nil, fmt.Errorf("montant de commande invalide: %.2f€", totalPrix)
	}

	commandQuery := `INSERT INTO commandes (username, status, adresse, total_prix, created_at, updated_at)
	                 VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
	                 RETURNING id, created_at, updated_at`

	var commandID int
	var createdAt, updatedAt time.Time

	err = d.QueryRow(commandQuery, username, "pending", deliveryAddress, totalPrix).Scan(
		&commandID, &createdAt, &updatedAt,
	)
	if err != nil {
		return nil, fmt.Errorf("erreur création commande: %w", err)
	}

	for _, item := range basketItems {
		productName, err := d.GetProductNameByID(item.ProductID)
		if err != nil || productName == "" {
			productName = fmt.Sprintf("Produit #%d", item.ProductID)
		}

		err = d.InsertCommandItemWithClientInfo(
			commandID,
			productName,
			item.ProductID,
			item.Quantity,
			item.Price,
			username,
			clientNom,
			clientPrenom,
			clientTelephone,
			deliveryAddress,
		)
		if err != nil {
			log.Printf("❌ Erreur INSERT command_items: %v", err)
			return nil, fmt.Errorf("erreur insertion items: %w", err)
		}

		stockQuery := `UPDATE products SET stock = stock - $1 WHERE id = $2 AND stock >= $1`
		result, err := d.Exec(stockQuery, item.Quantity, item.ProductID)
		if err != nil {
			log.Printf("⚠️ Erreur décrémentation stock produit %d: %v", item.ProductID, err)
			return nil, fmt.Errorf("erreur mise à jour stock: %w", err)
		}

		rowsAffected, _ := result.RowsAffected()
		if rowsAffected == 0 {
			log.Printf("⚠️ [CHECKOUT] Stock déjà réservé pour produit %d (double réservation panier/checkout)", item.ProductID)
		}
	}

	clearBasketQuery := `DELETE FROM baskets WHERE username = $1`
	_, err = d.Exec(clearBasketQuery, username)
	if err != nil {
		log.Printf("⚠️ Erreur vidage panier: %v", err)
	}

	sanitizedAddress := sanitizeLogMessage(deliveryAddress)
	d.AddCommandLog(commandID, "created",
		fmt.Sprintf("Commande créée - Adresse: %s - Total: %.2f€ - Client: %s %s",
			sanitizedAddress, totalPrix, sanitizeLogMessage(clientNom), sanitizeLogMessage(clientPrenom)),
		username)

	command := &models.Command{
		ID:              commandID,
		Username:        username,
		Status:          "pending",
		Total:           totalPrix,
		DeliveryAddress: deliveryAddress,
		CreatedAt:       createdAt,
		UpdatedAt:       updatedAt,
	}

	return command, nil
}

func (d *Database) GetAllCommands(status, username string) ([]map[string]any, error) {
	if username != "" {
		if err := validateUsername(username); err != nil {
			return nil, err
		}
	}

	if status != "" {
		if err := validateCommandStatus(status); err != nil {
			return nil, err
		}
	}

	query := `SELECT c.id, c.username, c.status, c.adresse, c.total_prix,
                     c.livreur_assign, c.created_at, c.updated_at,
                     c.proposed_address, c.address_proposal_status,
                     ROW_NUMBER() OVER (PARTITION BY c.username ORDER BY c.id) AS client_order_number
              FROM commandes c
              WHERE 1=1`

	args := []interface{}{}
	argPosition := 1

	if status == "" {
		query += ` AND c.status IN ('pending', 'assigned', 'en_route', 'arrived', 'livre')`
	} else {
		query += fmt.Sprintf(" AND c.status = $%d", argPosition)
		args = append(args, status)
		argPosition++
	}

	if username != "" {
		query += fmt.Sprintf(" AND c.username = $%d", argPosition)
		args = append(args, username)
		argPosition++
	}

	query += " ORDER BY c.created_at DESC LIMIT 1000"

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

	var commands []map[string]any
	for rows.Next() {
		var id int
		var username, status, adresse string
		var livreurAssign sql.NullString
		var proposedAddress sql.NullString
		var addressProposalStatus string
		var totalPrix float64
		var createdAt, updatedAt time.Time
		var clientOrderNumber int

		err := rows.Scan(&id, &username, &status, &adresse, &totalPrix, &livreurAssign, &createdAt, &updatedAt, &proposedAddress, &addressProposalStatus, &clientOrderNumber)
		if err != nil {
			return nil, fmt.Errorf("erreur lors du scan de la commande: %w", err)
		}

		adresse = sanitizeString(adresse)

		command := map[string]any{
			"id":                      id,
			"username":                username,
			"status":                  status,
			"adresse":                 adresse,
			"total_prix":              totalPrix,
			"created_at":              createdAt,
			"updated_at":              updatedAt,
			"address_proposal_status": addressProposalStatus,
			"client_order_number":     clientOrderNumber,
		}

		if livreurAssign.Valid {
			command["livreur_assign"] = livreurAssign.String
		} else {
			command["livreur_assign"] = nil
		}

		if proposedAddress.Valid {
			command["proposed_address"] = proposedAddress.String
		} else {
			command["proposed_address"] = nil
		}

		commands = append(commands, command)
	}

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

	return commands, nil
}

func (d *Database) GetCommandCount() (int, error) {
	var count int
	err := d.QueryRow("SELECT COUNT(*) FROM commandes").Scan(&count)
	if err != nil {
		return 0, fmt.Errorf("erreur récupération count commandes: %w", err)
	}
	return count, nil
}

func (d *Database) SetCommandReferralUsed(commandID int, amount float64) error {
	_, err := d.Exec(`UPDATE commandes SET referral_used = $1 WHERE id = $2`, amount, commandID)
	return err
}

func (d *Database) GetCommandByID(id int) (map[string]any, error) {
	query := `SELECT c.id, c.username, c.status, c.adresse, c.total_prix, c.livreur_assign, c.created_at, c.updated_at,
	                 c.proposed_address, c.address_proposal_status, c.referral_used,
	                 (SELECT COUNT(*) FROM commandes c2 WHERE c2.username = c.username AND c2.id <= c.id) AS client_order_number
	          FROM commandes c WHERE c.id = $1`

	var commandID int
	var username, status, adresse string
	var livreurAssign sql.NullString
	var proposedAddress sql.NullString
	var addressProposalStatus string
	var totalPrix, referralUsed float64
	var createdAt, updatedAt time.Time
	var clientOrderNumber int

	err := d.QueryRow(query, id).Scan(
		&commandID,
		&username,
		&status,
		&adresse,
		&totalPrix,
		&livreurAssign,
		&createdAt,
		&updatedAt,
		&proposedAddress,
		&addressProposalStatus,
		&referralUsed,
		&clientOrderNumber,
	)

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

	command := map[string]any{
		"id":                      commandID,
		"username":                username,
		"status":                  status,
		"adresse":                 adresse,
		"total_prix":              totalPrix,
		"created_at":              createdAt,
		"updated_at":              updatedAt,
		"address_proposal_status": addressProposalStatus,
		"referral_used":           referralUsed,
		"client_order_number":     clientOrderNumber,
	}

	if livreurAssign.Valid {
		command["livreur_assign"] = livreurAssign.String
	} else {
		command["livreur_assign"] = nil
	}

	if proposedAddress.Valid {
		command["proposed_address"] = proposedAddress.String
	} else {
		command["proposed_address"] = nil
	}

	return command, nil
}

func (d *Database) GetCommandAddress(commandID int) (string, error) {
	var address string
	query := `SELECT adresse FROM commandes WHERE id = $1`

	err := d.QueryRow(query, commandID).Scan(&address)
	if err == sql.ErrNoRows {
		return "", fmt.Errorf("commande non trouvée")
	}
	if err != nil {
		return "", fmt.Errorf("erreur lors de la récupération de l'adresse: %w", err)
	}

	return address, nil
}

func (d *Database) UpdateCommandAddress(commandID int, deliveryAddress string) error {
	if len(deliveryAddress) > 500 {
		return fmt.Errorf("adresse trop longue (max 500 caractères)")
	}
	if strings.TrimSpace(deliveryAddress) == "" {
		return fmt.Errorf("adresse vide non autorisée")
	}

	query := `UPDATE commandes
	          SET adresse = $1, updated_at = CURRENT_TIMESTAMP
	          WHERE id = $2`

	result, err := d.Exec(query, deliveryAddress, commandID)
	if err != nil {
		return fmt.Errorf("erreur lors de la mise à jour de l'adresse: %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("commande non trouvée")
	}

	log.Printf("✅ Adresse commande %d mise à jour", commandID)
	return nil
}

// ProposeAddressChange propose une nouvelle adresse (admin/cabine) en attente de validation client
func (d *Database) ProposeAddressChange(commandID int, proposedAddress, proposedBy string) error {
	if err := validateAddress(proposedAddress); err != nil {
		return err
	}

	query := `UPDATE commandes
	          SET proposed_address = $1, address_proposal_status = 'pending', updated_at = CURRENT_TIMESTAMP
	          WHERE id = $2`

	result, err := d.Exec(query, proposedAddress, commandID)
	if err != nil {
		return fmt.Errorf("erreur proposition adresse: %w", err)
	}
	rowsAffected, _ := result.RowsAffected()
	if rowsAffected == 0 {
		return fmt.Errorf("commande non trouvée")
	}

	d.AddCommandLog(commandID, "address_proposed",
		fmt.Sprintf("Nouvelle adresse proposée par %s: %s", proposedBy, proposedAddress),
		proposedBy)

	log.Printf("✅ Adresse proposée pour commande %d par %s", commandID, proposedBy)
	return nil
}

// RespondToAddressProposal accepte ou refuse la proposition d'adresse
func (d *Database) RespondToAddressProposal(commandID int, clientUsername string, accepted bool) error {
	var query string
	if accepted {
		query = `UPDATE commandes
		         SET adresse = proposed_address, proposed_address = NULL,
		             address_proposal_status = 'accepted', updated_at = CURRENT_TIMESTAMP
		         WHERE id = $1 AND username = $2 AND address_proposal_status = 'pending'`
	} else {
		query = `UPDATE commandes
		         SET proposed_address = NULL, address_proposal_status = 'rejected',
		             updated_at = CURRENT_TIMESTAMP
		         WHERE id = $1 AND username = $2 AND address_proposal_status = 'pending'`
	}

	result, err := d.Exec(query, commandID, clientUsername)
	if err != nil {
		return fmt.Errorf("erreur réponse proposition adresse: %w", err)
	}
	rowsAffected, _ := result.RowsAffected()
	if rowsAffected == 0 {
		return fmt.Errorf("aucune proposition en attente pour cette commande")
	}

	action := "refusée"
	if accepted {
		action = "acceptée"
	}
	d.AddCommandLog(commandID, "address_proposal_"+action,
		fmt.Sprintf("Proposition d'adresse %s par le client %s", action, clientUsername),
		clientUsername)

	log.Printf("✅ Proposition adresse %s pour commande %d", action, commandID)
	return nil
}

// UpdateCommandStatus met à jour le statut d'une commande
func (d *Database) UpdateCommandStatus(commandID int, status string) error {
	if err := validateCommandStatus(status); err != nil {
		return err
	}

	query := `UPDATE commandes SET status = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2`

	result, err := d.Exec(query, status, commandID)
	if err != nil {
		return fmt.Errorf("erreur lors de la mise à jour du statut: %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("commande non trouvée")
	}

	return nil
}

func (d *Database) AddCommandLog(commandID int, status, message, author string) error {
	sanitizedMessage := sanitizeLogMessage(message)
	sanitizedAuthor := sanitizeLogMessage(author)

	query := `INSERT INTO command_logs (command_id, status, message, author, created_at)
	          VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)`

	_, err := d.Exec(query, commandID, status, sanitizedMessage, sanitizedAuthor)
	if err != nil {
		log.Printf("⚠️  Avertissement: impossible d'ajouter le log (table command_logs peut-être manquante): %v", err)
		return nil
	}

	return nil
}

// GetCommandLogs récupère tous les logs d'une commande
func (d *Database) GetCommandLogs(commandID int) ([]map[string]any, error) {
	query := `SELECT id, command_id, status, message, author, created_at
	          FROM command_logs
	          WHERE command_id = $1
	          ORDER BY created_at ASC`

	rows, err := d.Query(query, commandID)
	if err != nil {
		// Si la table n'existe pas, retourner un tableau vide au lieu d'une erreur
		log.Printf("⚠️  Avertissement: impossible de récupérer les logs: %v", err)
		return []map[string]any{}, nil
	}
	defer rows.Close()

	var logs []map[string]any
	for rows.Next() {
		var id, commandID int
		var status, message, author string
		var createdAt time.Time

		err := rows.Scan(&id, &commandID, &status, &message, &author, &createdAt)
		if err != nil {
			return nil, fmt.Errorf("erreur lors du scan du log: %w", err)
		}

		logEntry := map[string]any{
			"id":         id,
			"command_id": commandID,
			"status":     status,
			"message":    message,
			"author":     author,
			"created_at": createdAt,
		}
		logs = append(logs, logEntry)
	}

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

	return logs, nil
}

func sanitizeLogMessage(message string) string {
	sanitized := strings.Map(func(r rune) rune {
		if r < 32 || r == 127 {
			return -1
		}
		return r
	}, message)

	if len(sanitized) > 1000 {
		sanitized = sanitized[:1000]
	}

	return sanitized
}

func (d *Database) ValidateDeliveryAtomic(commandID int, adminUsername string) (int, error) {
	tx, err := d.Begin()
	if err != nil {
		log.Printf("❌ [ValidateAtomic] Erreur début transaction: %v", err)
		return 0, fmt.Errorf("erreur transaction: %w", err)
	}
	defer tx.Rollback()

	var currentStatus, cmdUsername, livreurAssign string
	var totalPrix float64
	err = tx.QueryRow(`
		SELECT status, username, COALESCE(livreur_assign, ''), total_prix
		FROM commandes
		WHERE id = $1
		FOR UPDATE
	`, commandID).Scan(&currentStatus, &cmdUsername, &livreurAssign, &totalPrix)

	if err == sql.ErrNoRows {
		log.Printf("❌ [ValidateAtomic] Commande %d non trouvée", commandID)
		return 0, fmt.Errorf("commande non trouvée")
	}
	if err != nil {
		log.Printf("❌ [ValidateAtomic] Erreur SELECT: %v", err)
		return 0, fmt.Errorf("erreur lecture commande: %w", err)
	}

	log.Printf("📋 [ValidateAtomic] Commande trouvée - status=%s, client=%s, livreur=%s",
		currentStatus, cmdUsername, livreurAssign)

	validStatuses := []string{"assigned", "en_route", "pending", "livre"}
	isValid := slices.Contains(validStatuses, currentStatus)

	if !isValid {
		log.Printf("❌ [ValidateAtomic] Statut invalide pour validation: %s", currentStatus)
		return 0, fmt.Errorf("statut invalide pour validation: %s", currentStatus)
	}

	if currentStatus == "approved" {
		log.Printf("⚠️ [ValidateAtomic] Commande %d déjà approuvée", commandID)
		return 0, fmt.Errorf("commande déjà approuvée")
	}

	result, err := tx.Exec(`
		UPDATE commandes
		SET status = 'approved', updated_at = CURRENT_TIMESTAMP
		WHERE id = $1 AND status = $2
	`, commandID, currentStatus)

	if err != nil {
		log.Printf("❌ [ValidateAtomic] Erreur UPDATE: %v", err)
		return 0, fmt.Errorf("erreur mise à jour statut: %w", err)
	}

	rows, _ := result.RowsAffected()
	if rows == 0 {
		log.Printf("❌ [ValidateAtomic] Commande %d déjà modifiée (race condition évitée)", commandID)
		return 0, fmt.Errorf("commande déjà modifiée par une autre requête")
	}

	totalPoints := 0
	if cmdUsername != "" {
		log.Printf("🔍 [ValidateAtomic] Calcul points pour client: %s", cmdUsername)

		points, _, err := d.CalculateAndAddPointsForCommandTx(tx, commandID, cmdUsername)
		if err != nil {
			log.Printf("❌ [ValidateAtomic] Erreur calcul/ajout points: %v", err)
			return 0, fmt.Errorf("erreur attribution points: %w", err)
		}
		totalPoints = points

		log.Printf("✅ [ValidateAtomic] %d points attribués à %s", totalPoints, cmdUsername)

		_, err = tx.Exec(`
			UPDATE clients
			SET command = command + 1, updated_at = CURRENT_TIMESTAMP
			WHERE username = $1
		`, cmdUsername)
		if err != nil {
			log.Printf("⚠️ [ValidateAtomic] Erreur incrémentation compteur: %v", err)
		} else {
			log.Printf("✅ [ValidateAtomic] Compteur commandes incrémenté pour %s", cmdUsername)
		}
	}

	_, err = tx.Exec(`
		INSERT INTO command_logs (command_id, status, message, author, created_at)
		VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
	`, commandID, "approved",
		fmt.Sprintf("Livraison validée par admin %s - %d points attribués", adminUsername, totalPoints),
		adminUsername)

	if err != nil {
		log.Printf("⚠️ [ValidateAtomic] Erreur ajout log: %v", err)
	}

	if err := tx.Commit(); err != nil {
		log.Printf("❌ [ValidateAtomic] Erreur COMMIT: %v", err)
		return 0, fmt.Errorf("erreur commit transaction: %w", err)
	}

	log.Printf("🎉 [ValidateAtomic] SUCCÈS - Commande %d validée, %d points attribués",
		commandID, totalPoints)

	if livreurAssign != "" {
		log.Printf("📦 [ValidateAtomic] Optimisation queue pour livreur: %s", livreurAssign)
		go func() {
			err := d.CompleteDeliveryAndProcessNext(livreurAssign, commandID)
			if err != nil {
				log.Printf("⚠️ [ValidateAtomic] Erreur optimisation queue: %v", err)
			}
		}()
	}

	go func() {
		commandCacheKey := fmt.Sprintf("command:%d", commandID)
		Redis.Del(RedisCtx, commandCacheKey)

		if cmdUsername != "" {
			clientCacheKey := fmt.Sprintf("client:%s", cmdUsername)
			Redis.Del(RedisCtx, clientCacheKey)

			clientCommandsCacheKey := fmt.Sprintf("client:%s:commands", cmdUsername)
			Redis.Del(RedisCtx, clientCommandsCacheKey)
		}

		log.Printf("✅ [ValidateAtomic] Caches invalidés pour cmd %d", commandID)
	}()

	return totalPoints, nil
}

// ApproveDeliveryAtomic - Version atomique pour approbation client
func (d *Database) ApproveDeliveryAtomic(commandID int, username string) (int, string, error) {
	log.Printf("🔒 [ApproveAtomic] START - cmd=%d, client=%s", commandID, username)

	// ✅ ÉTAPE 1: Démarrer une transaction
	tx, err := d.Begin()
	if err != nil {
		log.Printf("❌ [ApproveAtomic] Erreur début transaction: %v", err)
		return 0, "", fmt.Errorf("erreur transaction: %w", err)
	}
	defer tx.Rollback()

	// ✅ ÉTAPE 2: SELECT FOR UPDATE pour verrouiller la commande
	var currentStatus, cmdUsername, livreurAssign string
	err = tx.QueryRow(`
		SELECT status, username, COALESCE(livreur_assign, '')
		FROM commandes
		WHERE id = $1
		FOR UPDATE
	`, commandID).Scan(&currentStatus, &cmdUsername, &livreurAssign)

	if err == sql.ErrNoRows {
		log.Printf("❌ [ApproveAtomic] Commande %d non trouvée", commandID)
		return 0, "", fmt.Errorf("commande non trouvée")
	}
	if err != nil {
		log.Printf("❌ [ApproveAtomic] Erreur SELECT: %v", err)
		return 0, "", fmt.Errorf("erreur lecture commande: %w", err)
	}

	log.Printf("📋 [ApproveAtomic] Commande trouvée - status=%s, owner=%s", currentStatus, cmdUsername)

	// ✅ ÉTAPE 3: Vérifier propriété
	if cmdUsername != username {
		log.Printf("❌ [ApproveAtomic] Commande n'appartient pas à %s (propriétaire: %s)",
			username, cmdUsername)
		return 0, "", fmt.Errorf("cette commande ne vous appartient pas")
	}

	// ✅ ÉTAPE 4: Vérifier le statut
	if currentStatus != "livre" {
		log.Printf("❌ [ApproveAtomic] Statut invalide: %s (attendu: livre)", currentStatus)
		return 0, "", fmt.Errorf("commande doit être en statut 'livre' (statut actuel: %s)", currentStatus)
	}

	// ✅ ÉTAPE 5: UPDATE avec vérification du statut
	result, err := tx.Exec(`
		UPDATE commandes
		SET status = 'approved', updated_at = CURRENT_TIMESTAMP
		WHERE id = $1 AND status = 'livre' AND username = $2
	`, commandID, username)

	if err != nil {
		log.Printf("❌ [ApproveAtomic] Erreur UPDATE: %v", err)
		return 0, "", fmt.Errorf("erreur mise à jour statut: %w", err)
	}

	rows, _ := result.RowsAffected()
	if rows == 0 {
		log.Printf("❌ [ApproveAtomic] Commande %d déjà modifiée (race condition évitée)", commandID)
		return 0, "", fmt.Errorf("commande déjà approuvée ou modifiée")
	}

	log.Printf("✅ [ApproveAtomic] Statut mis à jour: livre → approved")

	// ✅ ÉTAPE 6: Calculer et ajouter les points
	totalPoints, pointCategory, err := d.CalculateAndAddPointsForCommandTx(tx, commandID, username)
	if err != nil {
		log.Printf("❌ [ApproveAtomic] Erreur calcul points: %v", err)
		return 0, "", fmt.Errorf("erreur attribution points: %w", err)
	}

	log.Printf("✅ [ApproveAtomic] %d points [%s] attribués à %s", totalPoints, pointCategory, username)

	// ✅ ÉTAPE 7: Incrémenter le compteur de commandes
	_, err = tx.Exec(`
		UPDATE clients
		SET command = command + 1, updated_at = CURRENT_TIMESTAMP
		WHERE username = $1
	`, username)
	if err != nil {
		log.Printf("⚠️ [ApproveAtomic] Erreur incrémentation compteur: %v", err)
		// On ne bloque pas pour ça
	}

	// ✅ ÉTAPE 8: Ajouter un log
	_, err = tx.Exec(`
		INSERT INTO command_logs (command_id, status, message, author, created_at)
		VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
	`, commandID, "approved",
		fmt.Sprintf("Livraison confirmée par le client %s - %d points [%s] attribués", username, totalPoints, pointCategory),
		username)

	if err != nil {
		log.Printf("⚠️ [ApproveAtomic] Erreur ajout log: %v", err)
	}

	// ✅ ÉTAPE 9: Commit
	if err := tx.Commit(); err != nil {
		log.Printf("❌ [ApproveAtomic] Erreur COMMIT: %v", err)
		return 0, "", fmt.Errorf("erreur commit transaction: %w", err)
	}

	log.Printf("🎉 [ApproveAtomic] SUCCÈS - Commande %d approuvée, %d points [%s] attribués",
		commandID, totalPoints, pointCategory)

	// ✅ ÉTAPE 10: Optimiser queue livreur (async, après commit)
	if livreurAssign != "" {
		log.Printf("📦 [ApproveAtomic] Optimisation queue pour livreur: %s", livreurAssign)
		go func() {
			err := d.CompleteDeliveryAndProcessNext(livreurAssign, commandID)
			if err != nil {
				log.Printf("⚠️ [ApproveAtomic] Erreur optimisation queue: %v", err)
			}
		}()
	}

	// ✅ ÉTAPE 11: Invalider caches (async)
	go func() {
		commandCacheKey := fmt.Sprintf("command:%d", commandID)
		Redis.Del(RedisCtx, commandCacheKey)

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

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

		log.Printf("✅ [ApproveAtomic] Caches invalidés")
	}()

	return totalPoints, pointCategory, nil
}

// ApproveDeliveryAtomicByStaff - Confirmation de réception par admin ou cabine à la place du client
func (d *Database) ApproveDeliveryAtomicByStaff(commandID int, staffUsername string) (int, string, string, error) {
	log.Printf("🔒 [ApproveAtomicStaff] START - cmd=%d, staff=%s", commandID, staffUsername)

	tx, err := d.Begin()
	if err != nil {
		return 0, "", "", fmt.Errorf("erreur transaction: %w", err)
	}
	defer tx.Rollback()

	var currentStatus, clientUsername, livreurAssign string
	err = tx.QueryRow(`
		SELECT status, username, COALESCE(livreur_assign, '')
		FROM commandes
		WHERE id = $1
		FOR UPDATE
	`, commandID).Scan(&currentStatus, &clientUsername, &livreurAssign)

	if err == sql.ErrNoRows {
		return 0, "", "", fmt.Errorf("commande non trouvée")
	}
	if err != nil {
		return 0, "", "", fmt.Errorf("erreur lecture commande: %w", err)
	}

	if currentStatus != "livre" {
		return 0, "", "", fmt.Errorf("commande doit être en statut 'livre' (statut actuel: %s)", currentStatus)
	}

	result, err := tx.Exec(`
		UPDATE commandes
		SET status = 'approved', updated_at = CURRENT_TIMESTAMP
		WHERE id = $1 AND status = 'livre'
	`, commandID)
	if err != nil {
		return 0, "", "", fmt.Errorf("erreur mise à jour statut: %w", err)
	}

	rows, _ := result.RowsAffected()
	if rows == 0 {
		return 0, "", "", fmt.Errorf("commande déjà approuvée ou modifiée")
	}

	totalPoints, pointCategory, err := d.CalculateAndAddPointsForCommandTx(tx, commandID, clientUsername)
	if err != nil {
		return 0, "", "", fmt.Errorf("erreur attribution points: %w", err)
	}

	_, err = tx.Exec(`
		UPDATE clients
		SET command = command + 1, updated_at = CURRENT_TIMESTAMP
		WHERE username = $1
	`, clientUsername)
	if err != nil {
		log.Printf("⚠️ [ApproveAtomicStaff] Erreur incrémentation compteur: %v", err)
	}

	_, err = tx.Exec(`
		INSERT INTO command_logs (command_id, status, message, author, created_at)
		VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
	`, commandID, "approved",
		fmt.Sprintf("Réception confirmée par %s au nom du client %s - %d points attribués", staffUsername, clientUsername, totalPoints),
		staffUsername)
	if err != nil {
		log.Printf("⚠️ [ApproveAtomicStaff] Erreur log: %v", err)
	}

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

	log.Printf("🎉 [ApproveAtomicStaff] SUCCÈS - cmd=%d approuvée par %s, %d points → client %s",
		commandID, staffUsername, totalPoints, clientUsername)

	if livreurAssign != "" {
		go func() {
			if err := d.CompleteDeliveryAndProcessNext(livreurAssign, commandID); err != nil {
				log.Printf("⚠️ [ApproveAtomicStaff] Erreur queue: %v", err)
			}
		}()
	}

	go func() {
		Redis.Del(RedisCtx, fmt.Sprintf("command:%d", commandID))
		Redis.Del(RedisCtx, fmt.Sprintf("client:%s", clientUsername))
		Redis.Del(RedisCtx, fmt.Sprintf("client:%s:commands", clientUsername))
	}()

	return totalPoints, pointCategory, clientUsername, nil
}