Surprisingly, more abilities

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/SolarPower.cs

@@ -0,0 +1,34 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Solar Power is an ability that boosts Special Attack in harsh sunlight but causes the Pokémon to lose HP each turn.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Solar_Power_(Ability)">Bulbapedia - Solar Power</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "solar_power")]
+public class SolarPower : Script
+{
+    /// <inheritdoc />
+    public override void ChangeOffensiveStatValue(IExecutingMove move, IPokemon target, byte hit, uint defensiveStat,
+        ImmutableStatisticSet<uint> targetStats, Statistic stat, ref uint value)
+    {
+        if ((stat == Statistic.SpecialAttack &&
+             move.Battle.WeatherName == ScriptUtils.ResolveName<Weather.HarshSunlight>()) ||
+            move.Battle.WeatherName == ScriptUtils.ResolveName<Weather.DesolateLands>())
+        {
+            value = value.MultiplyOrMax(1.5f);
+        }
+    }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IScriptSource owner, IBattle battle)
+    {
+        if (owner is not IPokemon pokemon)
+            return;
+
+        if (!pokemon.IsUsable)
+            return;
+
+        pokemon.Damage(pokemon.MaxHealth / 8, DamageSource.Weather);
+    }
+}