Is it possible to make an artificially intelligent shooting bot?

I'm trying to make an AI that shoots at you, but only shoots if there's nothing in the way. How can I do this?

Note: Intended for use on a single player server.

I believe that it is possible, you may need to look at scripts that are some-what like that but dont shoot at you than Edit it to where it does shoot, I seriously dont know how to answer this...

You could try using Rocket propulsion, I think, but make it locate a character/Player instead of a brick

I'd use raycatsting. There is a great wiki on it.