From cb1fa592ab8551e1485a7f98f9a3df76438fe2f4 Mon Sep 17 00:00:00 2001
From: Mason Mackaman <masondeanm@aol.com>
Date: Fri, 30 Oct 2020 18:40:10 -0400
Subject: [PATCH] Refactor Equipment

---
 src/Game/Data/Item/Equipment.purs | 275 +++++++++++++++++++++++-------
 src/Game/Data/Item/Hands.purs     |  82 +++++++++
 2 files changed, 293 insertions(+), 64 deletions(-)
 create mode 100644 src/Game/Data/Item/Hands.purs

diff --git a/src/Game/Data/Item/Equipment.purs b/src/Game/Data/Item/Equipment.purs
index a82d367..292acf3 100644
--- a/src/Game/Data/Item/Equipment.purs
+++ b/src/Game/Data/Item/Equipment.purs
@@ -1,7 +1,6 @@
 module Game.Data.Item.Equipment where
 
 import Prelude
-
 import Data.Argonaut.Decode (class DecodeJson)
 import Data.Argonaut.Decode.Generic.Rep (genericDecodeJson)
 import Data.Argonaut.Encode (class EncodeJson)
@@ -12,44 +11,179 @@ import Data.Generic.Rep.Show (genericShow)
 import Game.Data.Experience (Level)
 import Game.Data.Stats (Stats)
 
+data Equipment
+  = Head Head
+  | Body Body
+  | Hands Hands
+  | Feet Feet
+  | HandItem HandItem
 
-data Equipment = 
-    Helmet EquipmentProps
-  | ChestPlate EquipmentProps
-  | Gloves EquipmentProps
-  | LeggGuards EquipmentProps
-  | Shoes EquipmentProps
-  | LongSword WeaponProps
-  | GreatSword WeaponProps
-  | Dagger WeaponProps
-  | Bow WeaponProps
+data HandItem
+  = MainHandItem MainHandItem
+  | OffHandItem OffHandItem
+  | EitherHandItem EitherHandItem
+  | TwoHandedItem TwoHandedItem
+
+derive instance genericHandItem :: Generic HandItem _
+
+derive instance eqHandItem :: Eq HandItem
+
+instance showHandItem :: Show HandItem where
+  show = genericShow
+
+instance encodeJsonHandItem :: EncodeJson HandItem where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonHandItem :: DecodeJson HandItem where
+  decodeJson = genericDecodeJson
+
+data Head
+  = Helmet EquipmentProps
+
+derive instance genericHead :: Generic Head _
+
+derive instance eqHead :: Eq Head
+
+instance showHead :: Show Head where
+  show = genericShow
+
+instance encodeJsonHead :: EncodeJson Head where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonHead :: DecodeJson Head where
+  decodeJson = genericDecodeJson
+
+data Body
+  = ChestPlate EquipmentProps
+
+derive instance genericBody :: Generic Body _
+
+derive instance eqBody :: Eq Body
+
+instance showBody :: Show Body where
+  show = genericShow
+
+instance encodeJsonBody :: EncodeJson Body where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonBody :: DecodeJson Body where
+  decodeJson = genericDecodeJson
+
+data Hands
+  = Gloves EquipmentProps
+
+derive instance genericHands :: Generic Hands _
+
+derive instance eqHands :: Eq Hands
+
+instance showHands :: Show Hands where
+  show = genericShow
+
+instance encodeJsonHands :: EncodeJson Hands where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonHands :: DecodeJson Hands where
+  decodeJson = genericDecodeJson
+
+data Feet
+  = Shoes EquipmentProps
+
+derive instance genericFeet :: Generic Feet _
+
+derive instance eqFeet :: Eq Feet
+
+instance showFeet :: Show Feet where
+  show = genericShow
+
+instance encodeJsonFeet :: EncodeJson Feet where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonFeet :: DecodeJson Feet where
+  decodeJson = genericDecodeJson
+
+data MainHandItem
+  = LongSword WeaponProps
   | Staff WeaponProps
-  | Shield ShieldProps
-
-type EquipmentProps = {
-  name :: String,
-  description :: String,
-  stats :: Stats,
-  levelRequirement :: Level
-}
-
-type WeaponProps = {
-  name :: String,
-  description :: String,
-  stats :: Stats,
-  levelRequirement :: Level,
-  damage :: Int
-}
-
-type ShieldProps = {
-  name :: String,
-  description :: String,
-  stats :: Stats,
-  levelRequirement :: Level,
-  block :: Int
-}
-
-derive instance genericEquipment:: Generic Equipment _
+
+derive instance genericMainHandItem :: Generic MainHandItem _
+
+derive instance eqMainHandItem :: Eq MainHandItem
+
+instance showMainHandItem :: Show MainHandItem where
+  show = genericShow
+
+instance encodeJsonMainHandItem :: EncodeJson MainHandItem where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonMainHandItem :: DecodeJson MainHandItem where
+  decodeJson = genericDecodeJson
+
+data OffHandItem
+  = Shield ShieldProps
+
+derive instance genericOffHandItem :: Generic OffHandItem _
+
+derive instance eqOffHandItem :: Eq OffHandItem
+
+instance showOffHandItem :: Show OffHandItem where
+  show = genericShow
+
+instance encodeJsonOffHandItem :: EncodeJson OffHandItem where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonOffHandItem :: DecodeJson OffHandItem where
+  decodeJson = genericDecodeJson
+
+data EitherHandItem
+  = Dagger WeaponProps
+
+derive instance genericEitherHandItem :: Generic EitherHandItem _
+
+derive instance eqEitherHandItem :: Eq EitherHandItem
+
+instance showEitherHandItem :: Show EitherHandItem where
+  show = genericShow
+
+instance encodeJsonEitherHandItem :: EncodeJson EitherHandItem where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonEitherHandItem :: DecodeJson EitherHandItem where
+  decodeJson = genericDecodeJson
+
+data TwoHandedItem
+  = GreatSword WeaponProps
+  | Bow WeaponProps
+
+derive instance genericTwoHandedItem :: Generic TwoHandedItem _
+
+derive instance eqTwoHandedItem :: Eq TwoHandedItem
+
+instance showTwoHandedItem :: Show TwoHandedItem where
+  show = genericShow
+
+instance encodeJsonTwoHandedItem :: EncodeJson TwoHandedItem where
+  encodeJson = genericEncodeJson
+
+instance decodeJsonTwoHandedItem :: DecodeJson TwoHandedItem where
+  decodeJson = genericDecodeJson
+
+type BaseProps
+  = ( name :: String
+    , description :: String
+    , stats :: Stats
+    , levelRequirement :: Level
+    )
+
+type EquipmentProps
+  = { | BaseProps }
+
+type WeaponProps
+  = { damage :: Int | BaseProps }
+
+type ShieldProps
+  = { block :: Int | BaseProps }
+
+derive instance genericEquipment :: Generic Equipment _
 
 instance showEquipment :: Show Equipment where
   show = genericShow
@@ -64,32 +198,45 @@ instance decodeJsonEquipment :: DecodeJson Equipment where
   decodeJson a = genericDecodeJson a
 
 levelRequirementOf :: Equipment -> Level
-levelRequirementOf item = 
-  case item of 
-    Helmet armor' -> armor'.levelRequirement
-    ChestPlate armor' -> armor'.levelRequirement
-    Gloves armor' -> armor'.levelRequirement
-    LeggGuards armor' -> armor'.levelRequirement
-    Shoes armor' -> armor'.levelRequirement
-    LongSword weapon' -> weapon'.levelRequirement
-    GreatSword weapon' -> weapon'.levelRequirement
-    Dagger weapon' -> weapon'.levelRequirement
-    Bow weapon' -> weapon'.levelRequirement
-    Staff weapon' -> weapon'.levelRequirement
-    Shield shield' -> shield'.levelRequirement
+levelRequirementOf = case _ of
+  Head h -> case h of
+    Helmet r -> r.levelRequirement
+  Body b -> case b of
+    ChestPlate r -> r.levelRequirement
+  Hands h -> case h of
+    Gloves r -> r.levelRequirement
+  Feet f -> case f of
+    Shoes r -> r.levelRequirement
+  HandItem h -> case h of
+    MainHandItem m -> case m of
+      LongSword r -> r.levelRequirement
+      Staff r -> r.levelRequirement
+    OffHandItem o -> case o of
+      Shield r -> r.levelRequirement
+    EitherHandItem e -> case e of
+      Dagger r -> r.levelRequirement
+    TwoHandedItem t -> case t of
+      GreatSword r -> r.levelRequirement
+      Bow r -> r.levelRequirement
 
 statsOf :: Equipment -> Stats
-statsOf item = 
-  case item of 
-    Helmet armor' -> armor'.stats
-    ChestPlate armor' -> armor'.stats
-    Gloves armor' -> armor'.stats
-    LeggGuards armor' -> armor'.stats
-    Shoes armor' -> armor'.stats
-    LongSword weapon' -> weapon'.stats
-    GreatSword weapon' -> weapon'.stats
-    Dagger weapon' -> weapon'.stats
-    Bow weapon' -> weapon'.stats
-    Staff weapon' -> weapon'.stats
-    Shield shield' -> shield'.stats
-
+statsOf item = case item of
+  Head h -> case h of
+    Helmet r -> r.stats
+  Body b -> case b of
+    ChestPlate r -> r.stats
+  Hands h -> case h of
+    Gloves r -> r.stats
+  Feet f -> case f of
+    Shoes r -> r.stats
+  HandItem h -> case h of
+    MainHandItem m -> case m of
+      LongSword r -> r.stats
+      Staff r -> r.stats
+    OffHandItem o -> case o of
+      Shield r -> r.stats
+    EitherHandItem e -> case e of
+      Dagger r -> r.stats
+    TwoHandedItem t -> case t of
+      GreatSword r -> r.stats
+      Bow r -> r.stats
diff --git a/src/Game/Data/Item/Hands.purs b/src/Game/Data/Item/Hands.purs
new file mode 100644
index 0000000..5769f74
--- /dev/null
+++ b/src/Game/Data/Item/Hands.purs
@@ -0,0 +1,82 @@
+module Game.Data.Item.Hands where
+
+import Prelude
+import Data.Either (Either(..))
+import Data.Either.Nested (type (\/))
+import Game.Data.Item.Equipment
+  ( HandItem(..)
+  , MainHandItem
+  , OffHandItem
+  , EitherHandItem
+  , TwoHandedItem
+  )
+
+data Wielding
+  = None
+  | MainHand (MainHandItem \/ EitherHandItem)
+  | OffHand (OffHandItem \/ EitherHandItem)
+  | BothHands (MainHandItem \/ EitherHandItem) (OffHandItem \/ EitherHandItem)
+  | TwoHanded TwoHandedItem
+
+data EitherMode
+  = Main
+  | Off
+  | Max
+
+equip :: Boolean -> EitherMode -> HandItem -> Wielding -> Wielding
+equip moveEither eitherMode item wielding = case item, wielding of
+  MainHandItem i, None -> MainHand $ Left i
+  OffHandItem i, None -> OffHand $ Left i
+  EitherHandItem i, None -> case eitherMode of
+    Main -> MainHand $ Right i
+    Off -> OffHand $ Right i
+    Max -> MainHand $ Right i
+  MainHandItem i, MainHand m -> case m of
+    Left _ -> MainHand $ Left i
+    Right e ->
+      if moveEither then
+        BothHands (Left i) (Right e)
+      else
+        MainHand $ Left i
+  OffHandItem i, MainHand m -> BothHands m $ Left i
+  EitherHandItem i, MainHand m -> case eitherMode of
+    Main -> case m of
+      Left _ -> MainHand $ Right i
+      Right e ->
+        if moveEither then
+          BothHands (Right i) (Right e)
+        else
+          MainHand $ Right i
+    Off -> BothHands m $ Right i
+    Max -> BothHands m $ Right i
+  MainHandItem m, OffHand o -> BothHands (Left m) o
+  OffHandItem i, OffHand o -> case o of
+    Left _ -> OffHand $ Left i
+    Right e ->
+      if moveEither then
+        BothHands (Right e) (Left i)
+      else
+        OffHand $ Left i
+  EitherHandItem i, OffHand o -> case eitherMode of
+    Main -> BothHands (Right i) o
+    Off -> case o of
+      Left _ -> OffHand $ Right i
+      Right e ->
+        if moveEither then
+          BothHands (Right e) (Right i)
+        else
+          OffHand $ Right i
+    Max -> BothHands (Right i) o
+  MainHandItem i, BothHands _ o -> BothHands (Left i) o
+  OffHandItem i, BothHands m _ -> BothHands m $ (Left i)
+  EitherHandItem i, BothHands m o -> case eitherMode of
+    Main -> BothHands (Right i) o
+    Off -> BothHands m (Right i)
+    Max -> BothHands (Right i) o
+  MainHandItem i, TwoHanded _ -> MainHand $ Left i
+  OffHandItem i, TwoHanded _ -> OffHand $ Left i
+  EitherHandItem i, TwoHanded _ -> case eitherMode of
+    Main -> MainHand $ Right i
+    Off -> OffHand $ Right i
+    Max -> MainHand $ Right i
+  TwoHandedItem i, _ -> TwoHanded i