Form creation failed

[zuppa]

Hello, I'm trying to implement a form in my controller, here's the code:
 

    public function formProduto()
    {
        
        $helper = new HelperForm();

        $form = array(
            'legend' => array(
                'title' => $this->l('Product Information'),
                'icon' => 'icon-cogs',
            ),
            'input' => array(
                array(
                    'type' => 'text',
                    'label' => $this->l('Product Name'),
                    'name' => 'product_name',
                ),
                array(
                    'type' => 'select',
                    'label' => $this->l('Category'),
                    'name' => 'category_id',
                    'options' => array(
                        'query' => $this->categoryOptions(), // Replace with your category options
                        'id' => 'id',
                        'name' => 'name',
                    ),
                ),
                array(
                    'type' => 'select',
                    'label' => $this->l('Supports'),
                    'name' => 'support_ids[]', // Use an array for multiple selection
                    'options' => array(
                        'query' => $this->supportOptions(), // Replace with your support options
                        'id' => 'id_support',
                        'name' => 'name',
                    ),
                    'multiple' => true, // Enable multiple selection
                ),
                array(
                    'type' => 'file',
                    'label' => $this->l('Product Image'),
                    'name' => 'product_image',
                ),
            ),
            'submit' => array(
                'title' => $this->l('Save'),
                'class' => 'btn btn-default pull-right',
            ),
        );
        
        $helper->fields_value = array(
            'product_name' => 'Default Product Name', // Set default values if needed
            'category_id' => 1, // Set the default category ID
            'support_ids[]' => array(1, 2), // Set default support IDs as an array
            'product_image' => 'DefaultImage.jpg', // Set the default image file name
        );
        
        $helper->form = $form;
        
        return $helper->generateForm($form);
      
        
        
        
    }

 

 

and its throwing Warning: Undefined array key "form" :

$_from = $_smarty_tpl->smarty->ext->_foreach->init($_smarty_tpl, $_smarty_tpl->tpl_vars['fieldset']->value['form'], 'field', false, 'key');

 

I'm new to prestashop system, what I'm I missing?