Misdirect smart-macro

[JahirahDK]

Hey everyone
I am trying to stitch together an intelligent Misdirection macro able to adapt and behave in accordance to circumstance....
Im looking to advance my current MD macro with some additional utility without having to rely addons...

Misdirection macro /cast [@focus,exists,nodead,help][help,nodead][@pet,nodead] Misdirection

This is the functionality I'd like to add...
Is this possible to achieve with API and scripting?

If [@focus,noexists] -- then set my current target as /focus and announce %t in party chat... If [@focus,exists] -- then bypass announcement and function normally