{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TemplateHaskell #-}
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module Xanthous.Entities.Creature.Hippocampus
(-- * Hippocampus
Hippocampus(..)
, initialHippocampus
-- ** Lenses
, destination
-- ** Destination
, Destination(..)
, destinationFromPos
-- *** Lenses
, destinationPosition
, destinationProgress
)
where
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import Xanthous.Prelude
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import Data.Aeson.Generic.DerivingVia
import Data.Aeson (ToJSON, FromJSON)
import Test.QuickCheck
import Test.QuickCheck.Arbitrary.Generic
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import Xanthous.Data
import Xanthous.Util.QuickCheck
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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, Ord, 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, Ord, Generic)
deriving anyclass (NFData, CoArbitrary, Function)
deriving Arbitrary via GenericArbitrary Hippocampus
deriving (ToJSON, FromJSON)
via WithOptions '[ FieldLabelModifier '[Drop 1] ]
Hippocampus
makeLenses ''Hippocampus
initialHippocampus :: Hippocampus
initialHippocampus = Hippocampus Nothing
