Wp_link_pages last page goes to Next Post

Hello,

I am trying to code in an if statement that basically says if last page of paginated post then go to next article. While still using the same navigation buttons.

I have this in the td_module_single_base:
function get_post_pagination() {
if (!$this->is_single) {
return '';
}
return wp_link_pages(array(
'before' => '<div class="td-stupid-list-pagination"><div class="td-stupid-list-button td-stupid-back">',
'after' => '</div>',
'link_before' => '<div>',
'link_after' => '</div>',
'echo' => false,
'separator' => '</div> <div class="td-stupid-list-button td-stupid-next">',
'next_or_number' => 'next',
'nextpagelink' => '<div class="stupid-next">NEXT</div></div>',
'previouspagelink' => '<div class="stupid-prev">PREVIOUS</div>',
));
}

I essentially need some sort of statement i think that just checks if it is the last page of the post and then if so have the next button click to the next article. ( or a static page )

I think I need to add a statement like this: but I think I am missing some pieces.

if($page === $numpages)
{
next_post('%','Next','');
}


Thanks!

function get_post_pagination() {
global $multipage, $numpages, $page;

}

In case anyone else wants a custom end page on all paginated posts that was the code I had to use.