style(game): display readable block coords

style(game): update log output

src/py2048/block.py

@@ -7,6 +7,11 @@ from .colors import COLORS
 from .config import Config
 
 
+def _show_pos(pos: int) -> int:
+    """Return the position in the grid."""
+    return pos // Config.BLOCK_SIZE + 1
+
+
 class Block(pygame.sprite.Sprite):
     def __init__(self, x: int, y: int, value: int | None = 2):
         """Initialize a block"""
@@ -14,6 +19,9 @@ class Block(pygame.sprite.Sprite):
         self.image = pygame.Surface((Config.BLOCK_SIZE, Config.BLOCK_SIZE))
         self.rect = self.image.get_rect()
         self.rect.topleft = (x, y)
+
+        logger.debug(f"Generated block({id(self)}) at {self}")
+
         self.value: int = value if value is not None else 2 if random.random() <= Config.BLOCK_VALUE_PROBABILITY else 4
         self.font = pygame.font.SysFont(Config.FONT_FAMILY, Config.FONT_SIZE)
         self.update()
@@ -29,11 +37,9 @@ class Block(pygame.sprite.Sprite):
         new_x = self.rect.x + dx
         new_y = self.rect.y + dy
         if 0 <= new_x <= Config.WIDTH - Config.BLOCK_SIZE and 0 <= new_y <= Config.HEIGHT - Config.BLOCK_SIZE:
-            logger.debug(f"Moving block({id(self)}): ({self.rect.x}, {self.rect.y}) => ({new_x}, {new_y})")
+            logger.debug(f"Moving block({id(self)}): {self} => ({_show_pos(new_x)}, {_show_pos(new_y)})")
             self.rect.x = new_x
             self.rect.y = new_y
-        else:
-            logger.debug("Move blocked: out of bounds")
 
     def update(self) -> None:
         """Update the block"""
@@ -59,17 +65,19 @@ class Block(pygame.sprite.Sprite):
 
     def __add__(self, other: "Block") -> None:
         """Add the value of two blocks and update the current block"""
+        logger.debug(f"Merging blocks ({id(self)}) and ({id(other)}) => ({id(self)}), {self}")
         self.value += other.value
         self.update()
 
     def __iadd__(self, other: "Block") -> None:
         """Add the value of two blocks and updae the current block"""
+        logger.debug(f"Merging blocks ({id(self)}) and ({id(other)}) => ({id(self)}), {self}")
         self.value += other.value
         self.update()
 
     def __repr__(self) -> str:
         """Return a string representation of the block"""
-        return f"Block({self.rect.x}, {self.rect.y})"
+        return f"({_show_pos(self.rect.x)}, {_show_pos(self.rect.y)})"
 
     def __str__(self) -> str:
         """Return a string representation of the block"""

src/py2048/game.py

@@ -78,18 +78,23 @@ class Game:
     def _move_blocks(self, dx: int, dy: int) -> None:
         """Move all the blocks by `dx` and `dy`."""
         moved_blocks = pygame.sprite.Group()  # Keep track of moved blocks to avoid double merging
+        blocks_to_remove = []
 
         for block in self.sprites:
             block.move(dx, dy)
 
-        for block in self.sprites:  # FIX: different value block merge
+        for block in self.sprites:
-            collidin_blocks = pygame.sprite.spritecollide(block, self.sprites, False)
+            colliding_blocks = pygame.sprite.spritecollide(block, self.sprites, False)
 
-            for other_block in collidin_blocks:
+            for other_block in colliding_blocks:
                 if block != other_block and block.value == other_block.value and other_block not in moved_blocks:
-                    block.increase_value()
+                    new_block = block + other_block
-                    self.sprites.remove(other_block)
+                    moved_blocks.add(new_block)
-                    moved_blocks.add(block)
+                    blocks_to_remove.extend([block, other_block])
+
+        for block in blocks_to_remove:
+            self.sprites.remove(block)
+
         self._generate_random_block()
 
     def _generate_random_block(self, count: int = 1) -> None:
@@ -104,7 +109,6 @@ class Game:
 
                 if not colliding_blocks:
                     self.sprites.add(block)
-                    logger.debug(f"Generated block({id(block)}) at ({x}, {y})")
                     break
 
     def exit(self) -> None: