Fixes for struggle

Moves.json

@@ -6877,17 +6877,6 @@
       "category": "status",
       "flags": ["protect", "reflectable", "mirror"]
     },
-    {
-      "name": "struggle",
-      "type": "normal",
-      "power": 50,
-      "pp": 255,
-      "accuracy": 0,
-      "priority": 0,
-      "target": "RandomOpponent",
-      "category": "physical",
-      "flags": ["contact", "protect"]
-    },
     {
       "name": "struggle_bug",
       "type": "bug",

Scripts/Moves/Struggle.as

@@ -1,8 +1,24 @@
 namespace Gen7 {
     [Move effect=Struggle]
-    shared class Struggle : PkmnScript {
-        void OnSecondaryEffect(ExecutingMove@ attack, Pokemon@ target, uint8 hit) override{
-            attack.User.Damage(uint(attack.User.MaxHealth / 4), DamageSource::Struggle);
+    class Struggle : PkmnScript {
+        void ChangeEffectiveness(ExecutingMove@, Pokemon@, uint8, float &inout eff) override {
+            eff = 1;
         }
+
+        void IsInvulnerable(ExecutingMove@, Pokemon@, bool &inout invul) override {
+            invul = false;
         }
+
+        void ModifyNumberOfHits(MoveTurnChoice@, uint8 &inout hitcount) override {
+            hitcount = 1;
+        }
+
+        void OnSecondaryEffect(ExecutingMove@ attack, Pokemon@, uint8) override {
+            auto damage = uint(attack.User.MaxHealth / 4);
+            if (damage == 0){
+                damage  = 1;
+            }
+            attack.User.Damage(damage, DamageSource::Struggle);
+        }
+    };
 }