Coupons.. Single and multi usage.

As shop owner / marketologist i want to define coupons configuration:
single usage
mulitusage with optional time frame
issue policy - personal issued to already existing shoppers or anonymous usage, in both cases by code
Multi usage for first N shoppers
coupons codes may be generated as guid (or some more shorter form) also codes may have configured prefixes to track how efficient each distribution channel
usage action - discount (total, particular product, etc), free shipping, etc.
As shop owner i would like to see different reports about coupons - issued, used, active on date, etc.

As shopper i want to have clear picture about where, when and for what i can use obtained coupon. Coupon code should be entered on cart's page.I want to see info is code applied to cart or not.

Some coupons configuration allow automatic coupon generation. I.e. campaign action.