From 7a8af18d0e1003c26eb595b5faa71e51da6286a6 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Mon, 17 Apr 2023 23:41:35 +0100
Subject: Added new shooter enemy

---
 src/Game/Entities/Shooter.hs | 67 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 src/Game/Entities/Shooter.hs

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

diff --git a/src/Game/Entities/Shooter.hs b/src/Game/Entities/Shooter.hs
new file mode 100644
index 0000000..6e9675f
--- /dev/null
+++ b/src/Game/Entities/Shooter.hs
@@ -0,0 +1,67 @@
+module Game.Entities.Shooter (mkShooter) where
+
+import Data.Bits (Bits (..))
+import Game.Entities.Common
+import Game.Entities.Const
+import Game.Entities.Types
+import qualified Game.Sprites as S
+
+blasterCoolDown :: Int
+blasterCoolDown = 128
+
+mkShooter :: S.SpriteSheet -> Int -> Int -> Dir -> Collision -> Collision -> IsBlocked -> Collision -> IO Entity
+mkShooter sprites x y d playerCollision playerInLine isBlocked playerVsBlast = do
+  s <- S.get sprites "shooter"
+  pure
+    Entity
+      { typ = TypeEnemy,
+        x = x,
+        y = y,
+        delay = frameDelay,
+        frame = 0,
+        set = toSpriteSet d,
+        jumping = False,
+        gravity = gravityOff,
+        dir = d,
+        sprite = s,
+        update = updateShooter playerCollision playerInLine isBlocked playerVsBlast,
+        destroy = False,
+        actions = [],
+        dat = ShooterData 0
+      }
+
+updateShooter :: Collision -> Collision -> IsBlocked -> Collision -> Entity -> IO Entity
+updateShooter touchedPlayer playerInLine isBlocked playerVsBlast e = do
+  touched <- touchedPlayer e
+  line <- playerInLine e
+  pure $ update touched line (updateFrame True (updateCoolDown e))
+  where
+    update :: Bool -> Bool -> Entity -> Entity
+    update wasTouched wasInLine ent
+      | wasInLine && ent.dat.coolDown == 0 =
+          ent
+            { dat = ShooterData blasterCoolDown,
+              actions = [ActionAddBlast blastX (ent.y + 8) ent.dir playerVsBlast isBlocked],
+              frame = 1,
+              delay = frameDelay * 2
+            }
+      | wasTouched = ent {actions = [ActionHitPlayer]}
+      | testBit ent.delay 1 = ent
+      | ent.dir == DirLeft
+          && (isBlocked (ent.x - 1) (ent.y + 17) || isBlocked (ent.x - 1) (ent.y + 17) || not (isBlocked (ent.x - 1) (ent.y + 24))) =
+          ent {dir = DirRight, set = toSpriteSet DirRight}
+      | ent.dir == DirLeft = ent {x = ent.x - 1}
+      | ent.dir == DirRight
+          && (isBlocked (ent.x + 16) (ent.y + 17) || isBlocked (ent.x + 16) (ent.y + 17) || not (isBlocked (ent.x + 16) (ent.y + 24))) =
+          ent {dir = DirLeft, set = toSpriteSet DirLeft}
+      | ent.dir == DirRight = ent {x = ent.x + 1}
+      | otherwise = ent
+
+    updateCoolDown :: Entity -> Entity
+    updateCoolDown ent
+      | ent.dat.coolDown > 0 = ent {dat = ShooterData (ent.dat.coolDown - 1)}
+      | otherwise = ent
+
+    blastX = case e.dir of
+      DirLeft -> e.x - 16
+      DirRight -> e.x + 16
-- 
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