More move effects

Plugins/PkmnLib.Plugin.Gen7/Scripts/Pokemon/ForesightEffect.cs

@@ -0,0 +1,40 @@
+using System.Linq;
+using PkmnLib.Static;
+using PkmnLib.Static.Libraries;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Pokemon;
+
+[Script(ScriptCategory.Pokemon, "foresight")]
+public class ForesightEffect : Script
+{
+    private readonly IReadOnlyTypeLibrary _typeLibrary;
+    private readonly TypeIdentifier _normalType;
+    private readonly TypeIdentifier _fightingType;
+    private readonly TypeIdentifier _ghostType;
+
+    public ForesightEffect(IReadOnlyTypeLibrary typeLibrary)
+    {
+        _typeLibrary = typeLibrary;
+        typeLibrary.TryGetTypeIdentifier("normal", out _normalType);
+        typeLibrary.TryGetTypeIdentifier("fighting", out _fightingType);
+        typeLibrary.TryGetTypeIdentifier("ghost", out _ghostType);
+    }
+    
+    /// <inheritdoc />
+    public override void PreventStatBoostChange(IPokemon target, Statistic stat, sbyte amount, bool selfInflicted, ref bool prevent)
+    {
+        if (stat == Statistic.Evasion) 
+            prevent = true;
+    }
+
+    /// <inheritdoc />
+    public override void ChangeEffectiveness(IExecutingMove move, IPokemon target, byte hit, ref float effectiveness)
+    {
+        
+        var hitData = move.GetHitData(target, hit);
+        if (hitData.Type == _normalType && target.Types.Contains(_fightingType))
+            effectiveness = _typeLibrary.GetEffectiveness(_normalType, target.Types.Where(x => x != _ghostType));
+        else if (hitData.Type == _fightingType && target.Types.Contains(_ghostType))
+            effectiveness = _typeLibrary.GetEffectiveness(_fightingType, target.Types.Where(x => x != _ghostType));
+    }
+}