structural improvments

lib/main.dart

@@ -10,12 +10,12 @@ class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Super Tic-Tac-Toe',
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
         useMaterial3: true,
       ),
-      home: const MyHomePage(title: 'Flutter Demo Home Page'),
+      home: const MyHomePage(title: 'Local Tic Tac Toe'),
     );
   }
 }
@@ -30,19 +30,85 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
-  List<TTCState> data = [
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-    TTCState.empty,
-  ];
-
   TTCState turn = TTCState.x;
+  late TTCGame game;
+
+  String get turnText => switch (turn) {
+        TTCState.empty => "",
+        TTCState.x => "X",
+        TTCState.o => "O",
+      };
+
+  void onTurnEnd() {
+    setState(() {
+      turn = switch (turn) {
+        TTCState.x => TTCState.o,
+        TTCState.o => TTCState.x,
+        _ => TTCState.x
+      };
+    });
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    game = TTCGame(
+      turn: turn,
+      onClick: onTurnEnd,
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+      ),
+      body: Padding(
+          padding: const EdgeInsets.all(10),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              const Spacer(flex: 5),
+              Center(
+                  child: Text(
+                "$turnText's turn",
+                style:
+                    const TextStyle(fontSize: 30, fontWeight: FontWeight.bold),
+              )),
+              const Spacer(flex: 1),
+              game,
+              const Spacer(flex: 5),
+            ],
+          )),
+    );
+  }
+}
+
+enum TTCState { empty, x, o }
+
+class TTCGame extends StatefulWidget {
+  const TTCGame({
+    super.key,
+    required this.turn,
+    this.data,
+    this.onClick,
+  });
+
+  final TTCState turn;
+  final Function? onClick;
+  final List<TTCState>? data;
+
+  /// hook to retrieve the turn state of the game
+
+  @override
+  State<StatefulWidget> createState() => _TTCGameState();
+}
+
+class _TTCGameState extends State<TTCGame> {
+  late TTCState turn;
+  late List<TTCState> data;
 
   void setCellState(int index) {
     setState(() {
@@ -54,19 +120,38 @@ class _MyHomePageState extends State<MyHomePage> {
         TTCState.empty => TTCState.empty,
       };
     });
+    widget.onClick?.call();
   }
 
   Widget _genCell(int index, TTCState state) => Container(
       decoration: BoxDecoration(border: Border.all()),
-      child: Center(
-          child: TTCCell(
+      child: TTCCell(
         state: state,
         stateSetCallback: () {
           setCellState(index);
         },
-      )));
+      ));
 
-  Widget _genGridvew() {
+  @override
+  void initState() {
+    super.initState();
+    turn = widget.turn;
+    data = widget.data ??
+        <TTCState>[
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+          TTCState.empty,
+        ];
+  }
+
+  @override
+  Widget build(BuildContext context) {
     List<Widget> cells = [];
     for (final (index, state) in data.indexed) {
       cells.add(_genCell(index, state));
@@ -77,53 +162,30 @@ class _MyHomePageState extends State<MyHomePage> {
       children: cells,
     );
   }
-
-  String _turnText(TTCState state) => switch (state) {
-        TTCState.x => "X",
-        TTCState.o => "O",
-        TTCState.empty => "O",
-      };
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-      ),
-      body: Padding(
-          padding: EdgeInsets.all(10),
-          child: Column(
-            mainAxisSize: MainAxisSize.min,
-            children: [
-              const Spacer(flex: 5),
-              Center(
-                  child: Text(
-                "${_turnText(turn)}'s turn",
-                style:
-                    const TextStyle(fontSize: 30, fontWeight: FontWeight.bold),
-              )),
-              const Spacer(flex: 1),
-              _genGridvew(),
-              const Spacer(flex: 5),
-            ],
-          )),
-    );
-  }
 }
 
-enum TTCState { empty, x, o }
-
 class TTCCell extends StatelessWidget {
-  const TTCCell({super.key, required this.state, this.stateSetCallback});
+  const TTCCell({
+    super.key,
+    required this.state,
+    this.stateSetCallback,
+    this.textStyle,
+  });
 
   final TTCState state;
   final VoidCallback? stateSetCallback;
+  final TextStyle? textStyle;
+
+  String get text => switch (state) {
+        TTCState.empty => "",
+        TTCState.x => "X",
+        TTCState.o => "O",
+      };
 
   @override
-  Widget build(BuildContext context) => switch (state) {
-        TTCState.empty => ElevatedButton(
-            onPressed: stateSetCallback, child: const Text("none")),
-        TTCState.x => const Text("X"),
-        TTCState.o => const Text("O"),
-      };
+  Widget build(BuildContext context) => InkWell(
+      onTap: stateSetCallback,
+      child: Center(
+        child: Text(text, style: textStyle),
+      ));
 }