how to add extra price to cart programmatically in prestahop 1.7 - customization

Question

Am new to prestashop 1.7. I want to add extra cost for customization product on adding to cart in prestashop 1.7. Please any body help me.
add own customization data to cart.
$idProduct = Tools::getValue('pid'); // for me it's always one
$qty=Tools::getValue('qty'); // always add one item
$token = Tools::getValue('token');
$customData_front = Tools::getValue('front_view');
$customData_back = Tools::getValue('back_view');
$customData = Tools::getValue('customdata');
$attribute =Tools::getValue('id_product_attribute')
if (is_null($this->context->cart->id)) {
$this->context->cart->add();
$this->context->cookie->__set('id_cart', $this->context->cart->id);
}
// get cart id if exists
if ($this->context->cookie->id_cart)
{
$cart = new Cart($this->context->cookie->id_cart);
}
// create new cart if needed
if (!isset($cart) OR !$cart->id)
{
$cart = new Cart($this->context->cookie->id_cart);
$cart->id_customer = (int)($this->context->cookie->id_customer);
$cart->id_address_delivery = (int) (Address::getFirstCustomerAddressId($cart->id_customer));
$cart->id_address_invoice = $cart->id_address_delivery;
$cart->id_lang = (int)($this->context->cookie->id_lang);
$cart->id_currency = (int)($this->context->cookie->id_currency);
$cart->id_carrier = 1;
$cart->recyclable = 0;
$cart->gift = 0;
$cart->add();
$this->context->cookie->id_cart = (int)($cart->id);
}
$product = new Product((int)$idProduct);
if ($attribute > 0) {
$minimal_quantity = (int)Attribute::getAttributeMinimalQty($this->id_product_attribute);
} else {
$minimal_quantity = (int)$product->minimal_quantity;
}
// add customizatated text
$check =serialize($customData);
$id_address_delivery = $cart->id_address_delivery;
$customization = $this->context->cart->addTextFieldToProduct((int)($idProduct), 9, Product::CUSTOMIZE_TEXTFIELD, serialize($customData));
$exising_customization = Db::getInstance()->executeS('SELECT id_customization FROM '._DB_PREFIX_.'customized_data ORDER BY id_customization DESC LIMIT 0,1');
$customization = $exising_customization[0]['id_customization'];
Db::getInstance()->execute('UPDATE ps_customization SET in_cart = 1, id_product_attribute = '.$attribute.',id_address_delivery='.$id_address_delivery.',quantity='.$minimal_quantity.' WHERE id_customization = ' .$customization);
// get product to add into cart
$productToAdd = new Product((int)($idProduct), true, (int)($this->context->cookie->id_lang));
$cart->update();
$this->context->cart->updateQty((int)($qty),(int)($idProduct),(int)($attribute),$customization,'up',(int)($id_address_delivery));
$cart->update();
In that I want add additional cost every customization.