As a personal hobby, I would like to program a web-based card game with a few tokens and write an AI for it. I do not want to spend time and effort on standard elements such as maintaining a list of games and coordinating who's playing who, or even writing a login system (ideally I'd like to use Google accounts).
My choice of programming language is flexible, but would prefer something I could run on Google app engine.
I know Google Play Games provides some of the APIs but I was hoping for something more comprehensive. Even better if it works with Google Play Games.
Can you recommend toolkits that provide all or most of this functionality?