whatsapp/services/MenuService.php

<?php

/**
 * Servicio de Gestión de Menús
 * Maneja la obtención y navegación de menús
 */

class MenuService
{
    private $db;
    
    public function __construct()
    {
        $this->db = Database::getInstance();
    }
    
    /**
     * Obtiene un menú por su ID
     * @param int $menuId
     * @return array|null
     */
    public function getMenu(int $menuId): ?array
    {
        $stmt = $this->db->prepare("
            SELECT * FROM menus 
            WHERE id = ? 
            AND status = 'active'
            LIMIT 1
        ");
        $stmt->execute([$menuId]);
        $menu = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if (!$menu) {
            return null;
        }
        
        // Obtener opciones del menú
        $menu['options'] = $this->getMenuOptions($menuId);
        
        return $menu;
    }
    
    /**
     * Obtiene un menú por su clave
     * @param string $menuKey
     * @return array|null
     */
    public function getMenuByKey(string $menuKey): ?array
    {
        $stmt = $this->db->prepare("
            SELECT * FROM menus 
            WHERE menu_key = ? 
            AND status = 'active'
            LIMIT 1
        ");
        $stmt->execute([$menuKey]);
        $menu = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if (!$menu) {
            return null;
        }
        
        $menu['options'] = $this->getMenuOptions($menu['id']);
        
        return $menu;
    }
    
    /**
     * Obtiene las opciones de un menú
     * @param int $menuId
     * @return array
     */
    public function getMenuOptions(int $menuId): array
    {
        $stmt = $this->db->prepare("
            SELECT * FROM menu_options 
            WHERE menu_id = ? 
            AND is_active = 1
            ORDER BY option_order ASC
        ");
        $stmt->execute([$menuId]);
        
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    
    /**
     * Obtiene el ID del menú principal
     * @return int|null
     */
    public function getMainMenuId(): ?int
    {
        $stmt = $this->db->prepare("
            SELECT id FROM menus 
            WHERE menu_key = 'lab_menu_principal' 
            AND status = 'active'
            LIMIT 1
        ");
        $stmt->execute();
        $result = $stmt->fetch(PDO::FETCH_ASSOC);
        
        return $result ? (int)$result['id'] : null;
    }
    
    /**
     * Procesa una opción seleccionada del menú
     * @param int $menuId
     * @param string $optionKey
     * @return array|null
     */
    public function processMenuOption(int $menuId, string $optionKey): ?array
    {
        $stmt = $this->db->prepare("
            SELECT * FROM menu_options 
            WHERE menu_id = ? 
            AND option_key = ? 
            AND is_active = 1
            LIMIT 1
        ");
        $stmt->execute([$menuId, $optionKey]);
        $option = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if (!$option) {
            return null;
        }
        
        return [
            'type' => $option['response_type'],
            'text' => $option['response_text'],
            'next_menu_id' => $option['next_menu_id']
        ];
    }
    
    /**
     * Formatea un menú con su welcome_message y opciones
     * @param int $menuId
     * @return string
     */
    public function formatMenuMessage(int $menuId): string
    {
        $menu = $this->getMenu($menuId);
        
        if (!$menu) {
            return "❌ Menú no disponible.";
        }
        
        $message = $menu['welcome_message'];
        
        // Si el welcome_message no incluye las opciones, agregarlas
        if (!empty($menu['options']) && strpos($message, '1️⃣') === false) {
            $message .= "\n\n";
            foreach ($menu['options'] as $option) {
                $emoji = $this->getNumberEmoji($option['option_key']);
                $message .= "$emoji {$option['option_text']}\n";
            }
        }
        
        return $message;
    }
    
    /**
     * Obtiene el emoji de número para una opción
     * @param string $number
     * @return string
     */
    private function getNumberEmoji(string $number): string
    {
        $emojis = [
            '0' => '0️⃣',
            '1' => '1️⃣',
            '2' => '2️⃣',
            '3' => '3️⃣',
            '4' => '4️⃣',
            '5' => '5️⃣',
            '6' => '6️⃣',
            '7' => '7️⃣',
            '8' => '8️⃣',
            '9' => '9️⃣'
        ];
        
        return $emojis[$number] ?? $number;
    }
    
    /**
     * Obtiene todos los menús activos
     * @return array
     */
    public function getAllMenus(): array
    {
        $stmt = $this->db->prepare("
            SELECT m.*, 
                   (SELECT COUNT(*) FROM menu_options WHERE menu_id = m.id AND is_active = 1) as options_count
            FROM menus m
            WHERE m.status = 'active'
            ORDER BY m.created_at ASC
        ");
        $stmt->execute();
        
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    
    /**
     * Obtiene el menú padre de un menú
     * @param int $menuId
     * @return array|null
     */
    public function getParentMenu(int $menuId): ?array
    {
        $stmt = $this->db->prepare("
            SELECT parent_menu_id FROM menus 
            WHERE id = ? 
            LIMIT 1
        ");
        $stmt->execute([$menuId]);
        $result = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if (!$result || !$result['parent_menu_id']) {
            return null;
        }
        
        return $this->getMenu($result['parent_menu_id']);
    }
}