Creating animation entirely by script

Hello, i'm new to unity and just started to familiarize myself with the animator, but can i create a fully working animation + animation controller files without actually using the animator, instead using a script?

I'm want to use this for automation purposes.

 

Yes, but with a couple caveats - 1) Only in the editor and 2) It's a real nightmare.
I used a custom editor to automate the process of importing sprites, slicing them, animating them, and creating controllers for them so that I could create and edit swaths of 2D characters in a single button click. Probably took me three weeks to develop and another three months to squash the biggest of the bugs - and it's a real mess. The API is just terrible.