feat : undo last played move

src/sections/play/gameInProgress.tsx

@@ -3,6 +3,7 @@ import { useAtom, useAtomValue } from "jotai";
 import { gameAtom, isGameInProgressAtom } from "./states";
 import { useEffect } from "react";
 import { playGameEndSound } from "@/lib/sounds";
+import UndoMoveButton from "./undoMoveButton";
 
 export default function GameInProgress() {
   const game = useAtomValue(gameAtom);
@@ -40,14 +41,11 @@ export default function GameInProgress() {
         <CircularProgress size={20} color="info" />
       </Grid>
 
-      <Grid
-        item
-        container
-        justifyContent="center"
-        alignItems="center"
-        xs={12}
-        gap={2}
-      >
+      <Grid item container justifyContent="center" alignItems="center" xs={12}>
+        <UndoMoveButton />
+      </Grid>
+
+      <Grid item container justifyContent="center" alignItems="center" xs={12}>
         <Button variant="outlined" onClick={handleResign}>
           Resign
         </Button>

src/sections/play/undoMoveButton.tsx

@@ -0,0 +1,32 @@
+import { Button } from "@mui/material";
+import { gameAtom, playerColorAtom } from "./states";
+import { useAtomValue } from "jotai";
+import { useChessActions } from "@/hooks/useChessActions";
+import { Color } from "@/types/enums";
+
+export default function UndoMoveButton() {
+  const game = useAtomValue(gameAtom);
+  const { goToMove, undoMove } = useChessActions(gameAtom);
+  const playerColor = useAtomValue(playerColorAtom);
+
+  const handleClick = () => {
+    const gameHistory = game.history();
+    const turnColor = game.turn();
+    if (
+      (turnColor === "w" && playerColor === Color.White) ||
+      (turnColor === "b" && playerColor === Color.Black)
+    ) {
+      if (gameHistory.length < 2) return;
+      goToMove(gameHistory.length - 2, game);
+    } else {
+      if (!gameHistory.length) return;
+      undoMove();
+    }
+  };
+
+  return (
+    <Button variant="outlined" onClick={handleClick}>
+      Undo your last move
+    </Button>
+  );
+}