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{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TemplateHaskell #-}
--------------------------------------------------------------------------------
module Xanthous.Entities.Creature
( -- * Creature
Creature(..)
-- ** Lenses
, creatureType
, hitpoints
, hippocampus
-- ** Creature functions
, newWithType
, damage
, isDead
, visionRadius
-- * Hippocampus
, Hippocampus(..)
-- ** Lenses
, destination
-- ** Destination
, Destination(..)
, destinationFromPos
-- *** Lenses
, destinationPosition
, destinationProgress
) where
--------------------------------------------------------------------------------
import Xanthous.Prelude
--------------------------------------------------------------------------------
import Test.QuickCheck
import Test.QuickCheck.Arbitrary.Generic
import Data.Aeson.Generic.DerivingVia
import Data.Aeson (ToJSON, FromJSON)
--------------------------------------------------------------------------------
import Xanthous.Entities.RawTypes hiding (Creature, description)
import Xanthous.Entities (Draw(..), DrawRawChar(..))
import Xanthous.Data
--------------------------------------------------------------------------------
data Destination = Destination
{ _destinationPosition :: !Position
-- | The progress towards the destination, tracked as an offset from the
-- creature's original position.
--
-- When this value reaches >= 1, the creature has reached their destination
, _destinationProgress :: !Tiles
}
deriving stock (Eq, Show, Generic)
deriving anyclass (NFData, CoArbitrary, Function)
deriving (ToJSON, FromJSON)
via WithOptions '[ FieldLabelModifier '[Drop 1] ]
Destination
instance Arbitrary Destination where arbitrary = genericArbitrary
makeLenses ''Destination
destinationFromPos :: Position -> Destination
destinationFromPos _destinationPosition =
let _destinationProgress = 0
in Destination{..}
data Hippocampus = Hippocampus
{ _destination :: !(Maybe Destination)
}
deriving stock (Eq, Show, Generic)
deriving anyclass (NFData, CoArbitrary, Function)
deriving (ToJSON, FromJSON)
via WithOptions '[ FieldLabelModifier '[Drop 1] ]
Hippocampus
instance Arbitrary Hippocampus where arbitrary = genericArbitrary
makeLenses ''Hippocampus
initialHippocampus :: Hippocampus
initialHippocampus = Hippocampus Nothing
--------------------------------------------------------------------------------
data Creature = Creature
{ _creatureType :: !CreatureType
, _hitpoints :: !Word
, _hippocampus :: !Hippocampus
}
deriving stock (Eq, Show, Generic)
deriving anyclass (NFData, CoArbitrary, Function)
deriving Draw via DrawRawChar "_creatureType" Creature
deriving (ToJSON, FromJSON)
via WithOptions '[ FieldLabelModifier '[Drop 1] ]
Creature
instance Arbitrary Creature where arbitrary = genericArbitrary
makeLenses ''Creature
--------------------------------------------------------------------------------
newWithType :: CreatureType -> Creature
newWithType _creatureType =
let _hitpoints = _creatureType ^. maxHitpoints
_hippocampus = initialHippocampus
in Creature {..}
damage :: Word -> Creature -> Creature
damage amount = hitpoints %~ \hp ->
if hp <= amount
then 0
else hp - amount
isDead :: Creature -> Bool
isDead = views hitpoints (== 0)
visionRadius :: Creature -> Word
visionRadius = const 50 -- TODO
{-# ANN module ("Hlint: ignore Use newtype instead of data" :: String) #-}
|
