module Vere.Ames where

import ClassyPrelude
import Data.IP
import Data.Void
import Noun
import Noun.TH
import Control.Lens

import qualified Urbit.Time  as Time

type Packet = ByteString

type Port = Word

data Ev
  = EvBarn                  -- [%barn ~]
  | EvHear Lane Packet      -- [%hear lane @]
  deriving (Eq, Ord, Show)

data Eff
  = Send Lane Packet
  | Turf [Turf]
  deriving (Eq, Ord, Show)

newtype Turf = MkTurf [Text]
  deriving (Eq, Ord, Show)

data Lane
  = Ip4f Time.Wen Port IPv4      -- [%if @da @ud @if]
  | Ip6  Void (Maybe Lane) Void  -- [%is @ud (unit lane) @is]
  | Ip4x Time.Wen Port IPv4      -- [%ix @da @ud @if]
  deriving (Eq, Ord, Show)

-- todo: manual instance needed?
deriveNoun ''IPv4

deriveNoun ''Ev
deriveNoun ''Eff
deriveNoun ''Turf
deriveNoun ''Lane

toIpv4 :: Lane -> IPv4
toIpv4 = \case
  Ip4f _ _ i        -> i
  Ip6  _ (Just l) _ -> toIpv4 l
  Ip6  _ _ _        -> error "IPv6 doesn't exist in practice"
  Ip4x _ _ i        -> i