Development of an import module for WordPress

There's a website on WP
It has an online store (IM) module, here's a directory screen of Tekst ukryty (characteristics are Tekst ukryty).

There are files that you need to circl on this IM Tekst ukryty
It's two files, a csv and an archive with pictures.

The task is to import this CSV and images to the site.
My vision for implementation:
Page where you select CSV and archive with pictures, button " Download"

Files are downloaded, parsim CSV, if there is a product, then we update its parameters, if there is no product, we create it.

Add the button "Remove all products".

The site archive (files and database dumps) is available.
Here's the database structure Tekst ukryty

I'm interested in price and timing.