Implements Hail

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

@@ -1,10 +1,53 @@
+using System.Collections.Generic;
+using System.Linq;
+using PkmnLib.Dynamic.Events;
+using PkmnLib.Dynamic.Models;
 using PkmnLib.Dynamic.ScriptHandling;
 using PkmnLib.Dynamic.ScriptHandling.Registry;
+using PkmnLib.Static;
+using PkmnLib.Static.Utils;
 
 namespace PkmnLib.Plugin.Gen7.Scripts.Weather;
 
 [Script(ScriptCategory.Weather, "hail")]
 public class Hail : Script
 {
-    // TODO: Implement Hail weather effect
+    public static void RegisterHailIgnoreAbility(StringKey abilityName)
+    {
+        _hailIgnoreAbilities.Add(abilityName);
+    }
+
+    private static readonly HashSet<StringKey> _hailIgnoreAbilities =
+    [
+        "ice_body",
+        "magic_guard",
+        "overcoat",
+        "snow_cloak"
+    ];
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        if (!battle.Library.StaticLibrary.Types.TryGetTypeIdentifier("ice", out var iceType))
+        {
+            iceType = new TypeIdentifier(255);
+        }
+        foreach (var side in battle.Sides)
+        {
+            foreach (var pokemon in side.Pokemon.WhereNotNull())
+            {
+                if (!pokemon.IsUsable)
+                    continue;
+                if (pokemon.Types.Contains(iceType))
+                    continue;
+                if (_hailIgnoreAbilities.Contains(pokemon.ActiveAbility.Name))
+                    continue;
+
+                var maxHealth = pokemon.BoostedStats.Hp;
+                var damage = maxHealth / 16;
+                // TODO: Consider Safety Goggles. Handle it inside the Damage method?
+                pokemon.Damage(damage, DamageSource.Weather, new EventBatchId());
+            }
+        }
+    }
 }