Initial commit

lib/core/energy_manager.dart

@@ -0,0 +1,31 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+
+class VigorManager {
+  static const int maxVigor = 3;
+  static const int rechargeHours = 3;
+
+  static Future<int> getAvailableVigor(Map<String, dynamic> userData) async {
+    int currentVigor = userData['vigor'] ?? maxVigor;
+    Timestamp? lastVigorRefill = userData['lastVigorRefill'];
+
+    if (lastVigorRefill == null) return currentVigor;
+
+    // Calculate time since last refill
+    DateTime lastTime = lastVigorRefill.toDate();
+    Duration diff = DateTime.now().difference(lastTime);
+
+    // If more than 3 hours have passed, full refill
+    if (diff.inHours >= rechargeHours) {
+      return maxVigor;
+    }
+
+    return currentVigor;
+  }
+
+  static Future<void> consumeVigor(String uid, int currentVigor) async {
+    await FirebaseFirestore.instance.collection('users').doc(uid).update({
+      'vigor': currentVigor - 1,
+      'lastVigorRefill': FieldValue.serverTimestamp(),
+    });
+  }
+}