Implements confusion effect

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

@@ -1,7 +1,98 @@
+using PkmnLib.Static.Moves;
+
 namespace PkmnLib.Plugin.Gen7.Scripts.Pokemon;
 
 [Script(ScriptCategory.Pokemon, "confusion")]
 public class Confusion : Script
 {
-    // TODO: Implement confusion
+    private int _turnsConfused;
+
+    /// <inheritdoc />
+    public override void OnAddedToParent(IScriptSource source)
+    {
+        if (source is not IPokemon pokemon)
+            throw new InvalidOperationException("Confusion script can only be added to a Pokemon.");
+        var battleData = pokemon.BattleData;
+        if (battleData == null)
+            throw new InvalidOperationException("Confusion script requires a Pokemon to be in a battle.");
+        _turnsConfused = battleData.Battle.Random.GetInt(2, 5);
+    }
+
+    /// <inheritdoc />
+    public override void StopBeforeMove(IExecutingMove move, ref bool stop)
+    {
+        _turnsConfused--;
+        move.Battle.EventHook.Invoke(new DialogEvent("pokemon_is_confused", new Dictionary<string, object>
+        {
+            { "pokemon", move.User },
+        }));
+        if (_turnsConfused <= 0)
+        {
+            RemoveSelf();
+            move.Battle.EventHook.Invoke(new DialogEvent("pokemon_snapped_out_of_confusion",
+                new Dictionary<string, object>
+                {
+                    { "pokemon", move.User },
+                }));
+            return;
+        }
+
+        if (move.Battle.Random.GetInt(0, 100) < 33)
+        {
+            var damage = move.Battle.Library.DamageCalculator.GetDamage(null, MoveCategory.Physical, move.User,
+                move.User, 1, 0, new ConfusionHitData());
+
+            EventBatchId batchId = new();
+
+            move.User.Damage(damage, DamageSource.Confusion, batchId);
+            move.Battle.EventHook.Invoke(new DialogEvent("pokemon_hit_itself_in_confusion",
+                new Dictionary<string, object>
+                {
+                    { "pokemon", move.User },
+                    { "damage", damage },
+                })
+            {
+                BatchId = batchId,
+            });
+
+            stop = true;
+        }
+    }
+
+    private class ConfusionHitData : IHitData
+    {
+        /// <inheritdoc />
+        public bool IsCritical => false;
+
+        /// <inheritdoc />
+        public ushort BasePower => 40;
+
+        /// <inheritdoc />
+        public float Effectiveness => 1.0f;
+
+        /// <inheritdoc />
+        public uint Damage { get; } = 0;
+
+        /// <inheritdoc />
+        public TypeIdentifier? Type => null;
+
+        /// <inheritdoc />
+        public bool IsContact => true;
+
+        /// <inheritdoc />
+        public bool HasFailed => false;
+
+        /// <inheritdoc />
+        public void Fail()
+        {
+        }
+
+        /// <inheritdoc />
+        public void SetFlag(StringKey flag)
+        {
+        }
+
+        /// <inheritdoc />
+        public bool HasFlag(StringKey flag) => false;
+    }
 }