At least, after long nights of programming, we are ready to present beta version of ET-Prolog. It is a SWI-Prolog extension, created for writing scripts, which control device (phone, computer...) behavior in dependence of state of surrounding world.
The main advantage of the language is that programs like headphone daemon can be written in only several lines of easy to read code. So you can use this language to describe phone behavior which would be the best for your needs.
You can learn more about this language and download it from official site
P.S. This is the first beta-release so this program may have buggy and unexpected behavior. So we don't recommend novice users to test it.