// Assets/_Project/Scripts/Gameplay/EnemyAbilities/SplitOnDeathAbilityDefinition.cs
using UnityEngine;
using TD.Core;

namespace TD.Gameplay.EnemyAbilities
{
    /// <summary>
    /// On death, spawns <see cref="SplitCount"/> copies of <see cref="SplitInto"/> at the corpse's
    /// position, continuing on toward the goal instead of restarting from the wave's spawner.
    /// </summary>
    [CreateAssetMenu(fileName = "SplitOnDeathAbility", menuName = "TD/Enemy Abilities/Split On Death")]
    public class SplitOnDeathAbilityDefinition : EnemyAbilityDefinition
    {
        public override EnemyAbilityKind Kind => EnemyAbilityKind.SplitOnDeath;

        [Header("Split")]
        [Tooltip("Smaller enemy type spawned when this enemy dies.")]
        public EnemyDefinition SplitInto;

        [Tooltip("How many copies of SplitInto spawn on death.")]
        [Min(1)]
        public int SplitCount = 2;

        [Tooltip("Random scatter radius (world units) applied to each split spawn so they don't " +
                 "spawn exactly on top of each other.")]
        [Min(0f)]
        public float ScatterRadius = 0.5f;

        public override void ServerOnDeath(EnemyAbility instance, EnemyHealth health)
        {
            if (SplitInto == null) return;

            var movement = instance.GetComponent<EnemyMovement>();
            var atTile = GridCoordinates.WorldToGrid(instance.transform.position);
            var ownerSlot = movement != null ? movement.OriginZone : PlayerSlot.None;

            WaveManager.Instance?.ServerSpawnSplitEnemies(SplitInto, SplitCount, atTile, ownerSlot, ScatterRadius);
        }
    }
}