Automatically Placing Amazon.com Purchase Order

need to build a web software that automatically places order on [login to view URL] - ideally developed as a web app, if web app is not a viable option technically, will consider desktop software client page interface: - user login on the client webpage - user will enter his [login to view URL] username/password - user will see multiple products. click on one (without leaving the client webpage) and the amazon order is placed for this product. admin backend: - add/enter/edit product info (amazon link, promotion code) - set active/inactive for each product - only active product is visible to user