what is the add to cart hook in woocommerce

I am working on woocommerce right now and I am testing few things ,
I need to retrieve the data of the user and the product that is added to the cart,
for example when the user add the product to the list ,execute a function that

 <script type="text">
"user _id":'.get_current_user_id().',
"product_id":'.$product->get_id().',
"product_price":'.$product->get_price().',
"product_name":'.$product->get_name().',

</script>';

but I don’t know what is the correct hook to write it in the add_action(hook name,function name)

I tried the same thing when the user enter the product page and it is working well by the following code:

add_action( 'woocommerce_single_product_summary','get_product_data');

function get_product_data() {
    global $product;
    global $current_user;
    echo '      
        <script type="text/test" id="product_data">
        {   
            "user":
            {
            "user_id":'.get_current_user_id().',
            "user_name":'.$current_user->user_login.',            
            "user_email":'.$current_user->user_email.'
            },
            "product":
            {
            "product_id":'.$product->get_id().',
            "product_price":'.$product->get_price().',
            "product_name":'.$product->get_name().',
            "product_description":'.$product->get_description().',
            "product_type":'.$product->get_type().',
            "product_average_rating":'.$product->get_average_rating().',
            "product_parent_id":'.$product->get_parent_id().',
            "product_rating_count":'.$product->get_rating_count().',
            "product_review_count":'.$product->get_review_count().',
            "product_children":'.$product->get_children().',
            "product_image_source":'.$src.'
            }
        }
        </script>
        ';
}

then I tried this to the add to cart:

add_action( 'woocommerce_add_to_cart',array($this, 'get_add_to_cart_product_data'));
function get_add_to_cart_product_data(){
        global $product;
        global $current_user;
        echo ' <script>  alert("the user '.$current_user->user_login.' added succesfully the '.$product->get_name().' product to the cart"); </script>';
}

it displays the correct user but it don’t access the product,it gives me an error : Uncaught Error: Call to a member function get_name() on null
that means it does not have access on the product like the ‘woocommerce_single_product_summary’ hook.

any idea it would help me to solve my problem thanks you