added FEN string support

Systems/Game/ChessGame.gd

@@ -21,6 +21,7 @@ var currentlyMovingPiece = null
 var p1Points: int = 0
 var p2Points: int = 0
 var Turn: int = 0 
+
 @onready var turnIndicator: ColorRect = $TurnIndicator
 @onready var p1String: RichTextLabel = $Player1Points
 @onready var p2String: RichTextLabel = $Player2Points 
@@ -35,6 +36,7 @@ var Turn: int = 0
 @export var tileYSize: int = 50
 @export var windowXSize: int = 1280
 @export var windowYSize: int = 720
+@export var FEN: String = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
 
 @onready var boardContainer: FlowContainer = $Flow
 @onready var stateMachine: StateMachine = $StateMachine
@@ -79,21 +81,53 @@ func initializeCardPreview() -> void:
     add_child(cardPreview)
 
 
+# func initializeBoard() -> void:
+#     board = []
+#     for i in range(boardXSize):
+#         var row = []
+#         for j in range(boardYSize):
+#             row.append(null)
+#         board.append(row)
+#     createBoard()
+#     setupPieces()
+#     if !boardContainer.has_user_signal("tile_pressed"):
+#         boardContainer.add_user_signal("tile_pressed")
+#     if !boardContainer.has_user_signal("send_location"):
+#         boardContainer.add_user_signal("send_location")
+
+
 func initializeBoard() -> void:
+    # Parse FEN to get board dimensions
+    # rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
+    var fen_parts = FEN.split(" ")
+    var rows = fen_parts[0].split("/")
+    boardYSize = rows.size()
+    boardXSize = 0
+    
+    # Calculate width from first row by counting both pieces and numbers
+    for c in rows[0]:
+        if c.is_valid_int():
+            boardXSize += int(c)  # Add the number of empty squares
+        else:
+            boardXSize += 1 
+    
+    # Calculate board width by counting pieces and empty squares in first row
+    # Initialize board array
     board = []
-    for i in range(boardXSize):
+    for i in range(boardYSize):
         var row = []
-        for j in range(boardYSize):
+        for j in range(boardXSize):
             row.append(null)
         board.append(row)
+        
     createBoard()
-    setupPieces()
+    setupPiecesFromFEN()
+    
     if !boardContainer.has_user_signal("tile_pressed"):
         boardContainer.add_user_signal("tile_pressed")
     if !boardContainer.has_user_signal("send_location"):
         boardContainer.add_user_signal("send_location")
 
-
 func setupUI() -> void:
     p1String.text = "0"
     p2String.text = "0"
@@ -229,10 +263,49 @@ func setupPieces() -> void:
     for x in range(boardXSize):
         placePiece(str(x) + "-6", "Pawn", 0)
 
+
+func setupPiecesFromFEN() -> void:
+    var fen_parts = FEN.split(" ")
+    var rows = fen_parts[0].split("/")
+    
+    # Iterate through rows in reverse to place black pieces at top
+    for y in range(rows.size()):
+        var x = 0
+        # Convert y coordinate to flip the board (7-y puts white at bottom)
+        var board_y = (boardYSize - 1) - y  # For an 8x8 board
+        for c in rows[y]:
+            if c.is_valid_int():
+                # Skip empty squares
+                x += int(c)
+            else:
+                var piece_info = getFENPieceInfo(c)
+                placePiece(str(x) + "-" + str(board_y), piece_info.name, piece_info.color)
+                x += 1
+
+
+func getFENPieceInfo(fen_char: String) -> Dictionary:
+    var piece_info = {
+        "name": "",
+        "color": 0  # Black
+    }
+    
+    # If uppercase, it's white
+    if fen_char.to_upper() == fen_char:
+        piece_info.color = 1  # White
+    
+    # Map FEN characters to piece names
+    match fen_char.to_upper():
+        "P": piece_info.name = "Pawn"
+        "R": piece_info.name = "Rook"
+        "N": piece_info.name = "Knight"
+        "B": piece_info.name = "Bishop"
+        "Q": piece_info.name = "Queen"
+        "K": piece_info.name = "King"
+    
+    return piece_info
+
 func placePiece(position: String, pieceName: String, color: int) -> void:
     var piece = summonPiece(pieceName, color)
-    # boardContainer.get_node(position).add_child(piece)
-    
     var container = boardContainer.get_node(position) as PieceContainer
     await container.set_piece(piece, false)
     container.remove_piece(true)
@@ -241,6 +314,18 @@ func placePiece(position: String, pieceName: String, color: int) -> void:
     var coords = position.split("-")
     board[int(coords[1])][int(coords[0])] = piece
 
+# func placePiece(position: String, pieceName: String, color: int) -> void:
+#     var piece = summonPiece(pieceName, color)
+#     # boardContainer.get_node(position).add_child(piece)
+    
+#     var container = boardContainer.get_node(position) as PieceContainer
+#     await container.set_piece(piece, false)
+#     container.remove_piece(true)
+#     container.set_piece(piece, false)
+
+#     var coords = position.split("-")
+#     board[int(coords[1])][int(coords[0])] = piece
+
 func summonPiece(pieceName: String, color: int) -> Node:
     var piece
     match pieceName:
@@ -309,7 +394,7 @@ func isValidMove(location: String) -> bool:
 func resetBoard() -> void:
     clearSelection()
     clearBoard()
-    setupPieces()
+    setupPiecesFromFEN()
     Turn = 0
     currentPlayer = WHITE
     p1Points = 0

Systems/TileManager.gd

@@ -81,11 +81,19 @@ func place_random_game_tiles(num_tiles: int = 8) -> void:
         push_error("TileManager not initialized with board_flow")
         return
         
+    var fen_parts = game.FEN.split(" ")
+    var rows = fen_parts[0].split("/")
     var available_positions = []
-    for x in range(game.boardXSize):
-        for y in range(game.boardYSize):
-            if y > 1 && y < 6:  # Don't place on starting rows
-                available_positions.append(str(x) + "-" + str(y))
+    
+    # Find empty rows from FEN
+    for y in range(rows.size()):
+        var row = rows[y]
+        # If row is all empty squares (like "8" in standard chess)
+        if row.is_valid_int() && int(row) == game.boardXSize:
+            var board_y = (game.boardYSize - 1) - y  # Flip y coordinate to match board orientation
+            # Add all positions in this empty row
+            for x in range(game.boardXSize):
+                available_positions.append(str(x) + "-" + str(board_y))
                 
     available_positions.shuffle()
 

board.tscn

@@ -27,6 +27,13 @@ offset_bottom = -5.0
 grow_horizontal = 2
 grow_vertical = 2
 script = ExtResource("1_fkb2r")
+boardXSize = null
+boardYSize = null
+tileXSize = null
+tileYSize = null
+windowXSize = null
+windowYSize = null
+FEN = null
 
 [node name="Flow" type="FlowContainer" parent="."]
 layout_mode = 1