migrating to Prestashop from a shopping cart that used friendly URLs

[Soliloquy]

I've run into a snag migrating a shop from an old, buggy shopping cart software, and I'm not sure of the best way to go about finishing the migration. The old shopping cart was hell-bent on optimizing SEO, including the use of friendly URLs. It didn't have categories, product ID numbers, query strings, or file extensions in the product URLs, just:
storename.com/product-name

Categories were storename.com/category-name. The shopping cart also generated category pages based on color, price range, tags, etc., all following that basic format. The shop has between 1000 and 7000 pages indexed in Google, depending on how you look at it. (Oddly enough, 0 are showing up in the Google search console part of Webmaster tools.)

I first tried to get the Prestashop URLs to exactly match the old ones, but the module I tried to use broke things and the pages couldn't be found. I then thought I would just get the URLs to be as friendly as I could get them and set up a ton of 301 redirects, but have been unable to download an entire list of the URLs; I've only managed to get 188 using these instructions. Also, I'm not sure what module I need or steps I need to take to generate those other pages for color, price range, tags, etc. Any advice on how to finally complete this without taking a hit in the rankings would be greatly appreciated!

[bellini13]

You are on the right track.  There may be modules for Prestashop that would help you here, but really at the end of the day, you need htaccess rewrite rules that would detect those old cart URLs, and then redirect to the new PS URLs

I would not describe this as easy, and its going to take a lot of work on your part to first identify all the old cart URLs, and then more work to create those rewrite rules.