From 7a714cc457323bff6b4a73ec9e7b58c7a63381ec Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Sun, 5 Mar 2023 14:55:25 +0000
Subject: Exit placement on the last battery

---
 src/Game.hs                 |  9 ++++++---
 src/Game/Entities.hs        | 10 ++++------
 src/Game/Entities/Pickup.hs |  2 +-
 src/Game/Entities/Types.hs  |  2 +-
 src/Game/State.hs           |  3 ++-
 5 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/src/Game.hs b/src/Game.hs
index 850d6ed..31aa40b 100644
--- a/src/Game.hs
+++ b/src/Game.hs
@@ -63,7 +63,9 @@ initialState m =
       totalLives = maxLives,
       hitDelay = hitDelay,
       gameOverDelay = 0,
-      exit = False
+      exit = False,
+      -- doesn't matter where
+      lastBattery = (0, 0)
     }
 
 main :: IO ()
@@ -169,16 +171,17 @@ gameLoop e = do
 
     gameLoop updatedEnv
   where
-    -- update state counters
+    -- update state counters, etc
     updateState :: Env -> IO Env
     updateState env
       | state.gameOverDelay > 1 = pure env {state = state {GS.gameOverDelay = state.gameOverDelay - 1}}
       | state.batteries == state.totalBatteries && not state.exit = do
-          es <- E.addExit env.entities
+          es <- E.addExit env.entities x (y - 8) -- adjusted to player's height
           pure env {entities = es, state = state {GS.exit = True}}
       | otherwise = pure env
       where
         state = env.state
+        (x, y) = state.lastBattery
 
 playLoop :: Env -> IO Env
 playLoop e = do
diff --git a/src/Game/Entities.hs b/src/Game/Entities.hs
index 2cfdd76..21b6ba5 100644
--- a/src/Game/Entities.hs
+++ b/src/Game/Entities.hs
@@ -53,12 +53,10 @@ playerPosition (Entities _ _ entities) =
   where
     player = head entities
 
-addExit :: Entities -> IO Entities
-addExit es = do
+addExit :: Entities -> Int -> Int -> IO Entities
+addExit es x y = do
   exit <- mkExit es.sprites x y (collision es.player 24)
   pure es {entities = es.entities ++ [exit]}
-  where
-    (x, y) = playerPosition es
 
 updateAll :: Entities -> GS.State -> IO (Entities, GS.State)
 updateAll es state = do
@@ -86,8 +84,8 @@ updateAll es state = do
         ActionAddEffect x y name -> do
           effect <- mkEffect es.sprites x y name
           processActions s (ents ++ [effect]) t
-        ActionAddBattery ->
-          processActions s {GS.batteries = s.batteries + 1} ents t
+        ActionAddBattery x y ->
+          processActions s {GS.batteries = s.batteries + 1, GS.lastBattery = (x, y)} ents t
         ActionHitPlayer -> do
           let (s', ents') =
                 if s.lives == 1
diff --git a/src/Game/Entities/Pickup.hs b/src/Game/Entities/Pickup.hs
index 7c1937c..a933efc 100644
--- a/src/Game/Entities/Pickup.hs
+++ b/src/Game/Entities/Pickup.hs
@@ -27,7 +27,7 @@ mkBattery sprites x y playerCollision = do
 updateBattery :: Collision -> Entity -> IO Entity
 updateBattery touchedPlayer e = do
   touched <- touchedPlayer e
-  pure $ if touched then e {destroy = True, actions = [ActionAddBattery]} else updateBatteryFrame
+  pure $ if touched then e {destroy = True, actions = [ActionAddBattery e.x e.y]} else updateBatteryFrame
   where
     updateBatteryFrame :: Entity
     updateBatteryFrame
diff --git a/src/Game/Entities/Types.hs b/src/Game/Entities/Types.hs
index dce4ffa..64b4637 100644
--- a/src/Game/Entities/Types.hs
+++ b/src/Game/Entities/Types.hs
@@ -29,7 +29,7 @@ data Entities = Entities
 -- | The effect name must match the sprite name in the spritesheet.
 type EffectName = String
 
-data Action = ActionAddEffect Int Int EffectName | ActionAddBattery | ActionHitPlayer
+data Action = ActionAddEffect Int Int EffectName | ActionAddBattery Int Int | ActionHitPlayer
 
 data Entity = Entity
   { typ :: Type,
diff --git a/src/Game/State.hs b/src/Game/State.hs
index 8987a2e..840c0ae 100644
--- a/src/Game/State.hs
+++ b/src/Game/State.hs
@@ -7,5 +7,6 @@ data State = State
     totalLives :: Int,
     hitDelay :: Int,
     gameOverDelay :: Int,
-    exit :: Bool
+    exit :: Bool,
+    lastBattery :: (Int, Int)
   }
-- 
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