Even more abilities

Plugins/PkmnLib.Plugin.Gen7/Scripts/Weather/DesolateLands.cs

@@ -33,4 +33,10 @@ public class DesolateLands : HarshSunlight
         if (move.UseMove.MoveType.Name == "water")
             fail = true;
     }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        // We don't want to call base.OnEndTurn here, as we want to prevent the weather from ending
+    }
 }

Plugins/PkmnLib.Plugin.Gen7/Scripts/Weather/HarshSunlight.cs

@@ -6,8 +6,29 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Weather;
 /// <see href="https://bulbapedia.bulbagarden.net/wiki/Harsh_sunlight">Bulbapedia - Harsh Sunlight</see>
 /// </summary>
 [Script(ScriptCategory.Weather, "harsh_sunlight")]
-public class HarshSunlight : Script
+public class HarshSunlight : Script, ILimitedTurnsScript
 {
+    private int? _duration;
+
+    /// <inheritdoc />
+    public int TurnsRemaining => _duration ?? 0;
+
+    /// <inheritdoc />
+    public void SetTurns(int turns)
+    {
+        _duration = turns;
+    }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        _duration--;
+        if (_duration <= 0)
+        {
+            battle.SetWeather(null, 0);
+        }
+    }
+
     /// <inheritdoc />
     public override void ChangeBasePower(IExecutingMove move, IPokemon target, byte hit, ref ushort basePower)
     {

Plugins/PkmnLib.Plugin.Gen7/Scripts/Weather/PrimordialSea.cs

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Weather;
 
 [Script(ScriptCategory.Weather, "primordial_sea")]
-public class PrimordialSea : Script
+public class PrimordialSea : Rain
 {
     private HashSet<IPokemon> _placers = new();
 
@@ -26,4 +26,16 @@ public class PrimordialSea : Script
             return;
         preventWeatherChange = true;
     }
+
+    public override void FailMove(IExecutingMove move, ref bool fail)
+    {
+        if (move.UseMove.MoveType.Name == "fire")
+            fail = true;
+    }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        // We don't want to call base.OnEndTurn here, as we want to prevent the weather from ending
+    }
 }

Plugins/PkmnLib.Plugin.Gen7/Scripts/Weather/Rain.cs

@@ -1,7 +1,53 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Weather;
 
 [Script(ScriptCategory.Weather, "rain")]
-public class Rain : Script
+public class Rain : Script, ILimitedTurnsScript
 {
-    // TODO: Implement Rain
+    private int? _duration;
+
+    /// <inheritdoc />
+    public int TurnsRemaining => _duration ?? 0;
+
+    /// <inheritdoc />
+    public void SetTurns(int turns)
+    {
+        _duration = turns;
+    }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        _duration--;
+        if (_duration <= 0)
+        {
+            battle.SetWeather(null, 0);
+        }
+    }
+
+    /// <inheritdoc />
+    public override void ChangeBasePower(IExecutingMove move, IPokemon target, byte hit, ref ushort basePower)
+    {
+        var hitType = move.GetHitData(target, hit).Type;
+        if (hitType?.Name == "water")
+        {
+            // Increase Water-type move power by 50% in rain
+            basePower = (ushort)(basePower * 1.5);
+        }
+        else if (hitType?.Name == "fire")
+        {
+            // Decrease Fire-type move power by 50% in rain
+            basePower = (ushort)(basePower * 0.5);
+        }
+    }
+
+    /// <inheritdoc />
+    public override void ChangeAccuracy(IExecutingMove executingMove, IPokemon target, byte hitIndex,
+        ref int modifiedAccuracy)
+    {
+        modifiedAccuracy = executingMove.UseMove.Name.ToString() switch
+        {
+            "thunder" or "hurricane" or "bleakwind_storm" or "windbolt_storm" or "sandsear_storm" => 1000,
+            _ => modifiedAccuracy,
+        };
+    }
 }