Imlements baneful bunker, data fixes

Plugins/PkmnLib.Plugin.Gen7/Scripts/Moves/ProtectionScript.cs

@@ -0,0 +1,47 @@
+using System;
+using PkmnLib.Dynamic.Models;
+using PkmnLib.Dynamic.ScriptHandling;
+using PkmnLib.Plugin.Gen7.Scripts.Pokemon;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+public abstract class ProtectionScript : Script
+{
+    protected abstract ProtectionEffectScript GetEffectScript();
+    
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        var battleData = target.BattleData;
+        if (battleData == null)
+            return;
+        // If the user goes last in the turn, the move will fail
+        if (battleData.Battle.ChoiceQueue is not null && !battleData.Battle.ChoiceQueue.HasNext())
+        {
+            move.GetHitData(target, hit).Fail();
+            return;
+        }
+        
+        var failure = target.Volatile.Get<ProtectionFailureScript>();
+        if (failure == null)
+        {
+            failure = new ProtectionFailureScript();
+            target.Volatile.Add(failure);
+        }
+
+        var successive = failure.ProtectTurns;
+        // Each time, the chance of success is divided by 3. 
+        var chance = 1.0 / Math.Pow(3, successive);
+        var random = target.BattleData!.Battle.Random.GetFloat();
+        if (random < chance)
+        {
+            failure.ProtectTurns++;
+            failure.UsedProtect = true;
+            target.Volatile.Add(GetEffectScript());
+        }
+        else
+        {
+            move.GetHitData(target, hit).Fail();
+        }
+    }
+}