testing slot

luckychit/lib/shared/widgets/alternative_draw_animations.dart

@@ -401,7 +401,9 @@ class _SlotMachineDrawAnimationState extends State<SlotMachineDrawAnimation>
   bool _isAnimating = false;
   bool _isComplete = false;
   String? _winnerId;
+  final List<String> _baseNames = [];
   List<String> _displayNames = [];
+  int _currentIndex = 0;
   Timer? _slotTimer;
 
   @override
@@ -434,8 +436,7 @@ class _SlotMachineDrawAnimationState extends State<SlotMachineDrawAnimation>
       curve: Curves.easeInOut,
     ));
     
-    // Prepare display names
-    _displayNames = widget.members.map((m) => m['name']?.toString() ?? 'Unknown').toList();
+    _prepareDisplayNames();
     
     // Auto-start after delay
     Future.delayed(const Duration(milliseconds: 500), () {
@@ -451,6 +452,50 @@ class _SlotMachineDrawAnimationState extends State<SlotMachineDrawAnimation>
     super.dispose();
   }
 
+  void _prepareDisplayNames() {
+    _baseNames.clear();
+    _baseNames.addAll(
+      widget.members.map((m) => m['name']?.toString() ?? 'Unknown'),
+    );
+
+    if (_baseNames.isEmpty) {
+      _baseNames.add('Unknown');
+    }
+
+    // Ensure we have at least 7 entries to fill the slot windows
+    if (_baseNames.length < 7) {
+      final original = List<String>.from(_baseNames);
+      while (_baseNames.length < 7) {
+        _baseNames.addAll(original);
+      }
+    }
+
+    _shuffleBaseNames();
+    _currentIndex = 0;
+    _updateDisplayWindow();
+  }
+
+  void _shuffleBaseNames() {
+    final seedSource = DateTime.now().millisecondsSinceEpoch.toString();
+    final hash = _generateHash(seedSource);
+    final randomValue = _hashToNumber(hash);
+    final random = math.Random(randomValue);
+
+    for (var i = _baseNames.length - 1; i > 0; i--) {
+      final j = random.nextInt(i + 1);
+      final temp = _baseNames[i];
+      _baseNames[i] = _baseNames[j];
+      _baseNames[j] = temp;
+    }
+  }
+
+  void _updateDisplayWindow() {
+    _displayNames = List.generate(
+      7,
+      (index) => _baseNames[(_currentIndex + index) % _baseNames.length],
+    );
+  }
+
   void _startAnimation() {
     if (_isAnimating) return;
     
@@ -488,8 +533,8 @@ class _SlotMachineDrawAnimationState extends State<SlotMachineDrawAnimation>
       }
       
       setState(() {
-        // Shuffle the display names for effect
-        _displayNames.shuffle();
+        _currentIndex = (_currentIndex + 1) % _baseNames.length;
+        _updateDisplayWindow();
       });
       
       _slotController.forward().then((_) {
@@ -512,7 +557,8 @@ class _SlotMachineDrawAnimationState extends State<SlotMachineDrawAnimation>
             }
             
             setState(() {
-              _displayNames.shuffle();
+              _currentIndex = (_currentIndex + 1) % _baseNames.length;
+              _updateDisplayWindow();
             });
             
             _slotController.forward().then((_) {
@@ -528,20 +574,23 @@ class _SlotMachineDrawAnimationState extends State<SlotMachineDrawAnimation>
 
   void _completeAnimation() {
     final winnerName = widget.members.firstWhere((m) => m['id'] == _winnerId)['name'];
+    final winnerIndex = _baseNames.indexOf(winnerName);
     
     setState(() {
       _isAnimating = false;
       _isComplete = true;
-      // Show winner in center position (index 3) with padding names for 7 slots
-      _displayNames = [
-        _displayNames.isNotEmpty ? _displayNames[0] : '',
-        _displayNames.length > 1 ? _displayNames[1] : '',
-        _displayNames.length > 2 ? _displayNames[2] : '',
-        winnerName, // Center (index 3) - the winner!
-        _displayNames.length > 4 ? _displayNames[4] : '',
-        _displayNames.length > 5 ? _displayNames[5] : '',
-        _displayNames.length > 6 ? _displayNames[6] : '',
-      ];
+      if (winnerIndex != -1) {
+        final List<String> window = [];
+        for (int offset = -3; offset <= 3; offset++) {
+          final index = (winnerIndex + offset) % _baseNames.length;
+          final adjustedIndex = index < 0 ? index + _baseNames.length : index;
+          window.add(_baseNames[adjustedIndex]);
+        }
+        _displayNames = window;
+      } else {
+        _displayNames = List.filled(7, '', growable: false);
+        _displayNames[3] = winnerName;
+      }
     });
     
     _pulseController.stop();