Question about macro/addon capabilities.

[BasketCase209]

I was wondering if I could borrow your guys' expertise for a sec.
I've been trying to figure out how to create a macro that would cast a different spell under certain conditions.

For example, a macro that casts Flame Shock, but if target already has debuff Flame Shock, then the macro casts Earth Shock instead (or Fire Nova).
Also, (don't hate me) one that only casts Wind Shear if the target is casting an interruptible spell.
...and maybe casts Lighting Bolt when Maelstrom Weapon stacks five times, but if I'm below %25 hp will cast Greater Healing instead.

I've been trying for the past few days to learn LUA and write an addon that would do that but I keep getting confused, lol.
I know if you use a secure action button or whatever it's called you can have a button that casts a certain spell.
I also use Tell Me When because my attention span is dismal on a good day.

I've been hearing Blizzard has been becoming more and more rigid about macro capabilities, so if this cannot be accomplished simply by creating a macro, does anyone know of an addon that I could use to accomplish this that adheres to the rules set by Blizzard (I'd like to not be banned).

I greatly appreciate your help and suggestions.

[Ultraviolence]

All this can be done and more using the WoW API. However, without a program to enable the usage of protected lua functions, what you're asking for is impossible.