From ed585355b1f78de15885e803138a98b75ca2b1e2 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Mon, 20 Feb 2023 21:52:22 +0000
Subject: Split entities in modules.

---
 src/Game/Entities/Slime.hs | 51 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/Game/Entities/Slime.hs

(limited to 'src/Game/Entities/Slime.hs')

diff --git a/src/Game/Entities/Slime.hs b/src/Game/Entities/Slime.hs
new file mode 100644
index 0000000..91e756f
--- /dev/null
+++ b/src/Game/Entities/Slime.hs
@@ -0,0 +1,51 @@
+module Game.Entities.Slime (mkSlime) where
+
+import Data.Bits (Bits (..))
+import Data.IORef
+import Game.Entities.Common
+import Game.Entities.Const
+import Game.Entities.Types
+import qualified Game.Sprites as S
+
+mkSlime :: S.SpriteSheet -> Int -> Int -> IORef Entity -> IsBlocked -> IO () -> IO Entity
+mkSlime sprites x y playerRef isBlocked hitPlayer' = do
+  s <- S.get sprites "slime"
+  pure
+    Entity
+      { typ = TypeEnemy,
+        x = x,
+        y = y,
+        delay = frameDelay,
+        frame = 0,
+        jumping = False,
+        gravity = gravityOff,
+        dir = DirRight,
+        sprite = s,
+        update = updateSlime (collision playerRef) isBlocked hitPlayer',
+        destroy = False,
+        spawns = []
+      }
+
+updateSlime :: Collision -> IsBlocked -> IO () -> Entity -> IO Entity
+updateSlime touchedPlayer isBlocked hitPlayer' e = do
+  touched <- touchedPlayer e
+  let updated = updateSlimeFrame
+  if touched then fmap (const e) hitPlayer' else pure $ updateMovement updated
+  where
+    updateMovement :: Entity -> Entity
+    updateMovement ent
+      | testBit ent.delay 1 = ent
+      | ent.dir == DirLeft
+          && (isBlocked (ent.x - 1) (ent.y + 15) || isBlocked (ent.x - 1) (ent.y + 10) || not (isBlocked (ent.x - 1) (ent.y + 16))) =
+          ent {dir = DirRight}
+      | ent.dir == DirLeft = ent {x = ent.x - 1}
+      | ent.dir == DirRight
+          && (isBlocked (ent.x + 16) (ent.y + 15) || isBlocked (ent.x + 16) (ent.y + 10) || not (isBlocked (ent.x + 16) (ent.y + 16))) =
+          ent {dir = DirLeft}
+      | ent.dir == DirRight = ent {x = ent.x + 1}
+      | otherwise = ent
+    updateSlimeFrame :: Entity
+    updateSlimeFrame
+      | e.delay > 0 = e {delay = e.delay - 1}
+      | e.frame + 1 < frameLimit e = e {delay = frameDelay + 2, frame = e.frame + 1}
+      | otherwise = e {delay = frameDelay + 2, frame = 0}
-- 
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