Can irssi do these things for me?

Hello

I have some specific needs for a project I'm running and need a
configurable terminal irc client and heard irssi is the best choice.

I would be very glad if someone could help answer if they are possible
and point me in the right direction.
Maybe this information can be found in the docs, in that case sorry for
asking unnecessary questions, but I didn't manage to find it.

So, are there settings and/or scripts that will let me do the following:

1) Hide nicks from output
2) Hide my own messages from output
3) Switch theme upon receiving a special message, e g turn the statusbar
red if I receive an "alert command"

Thank you!

/Tomas Walch