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

namespace TD.Gameplay.EnemyAbilities
{
    /// <summary>
    /// On death, spawns <see cref="SplitCount"/> smaller copies of the dying enemy's own type at
    /// the corpse's position, continuing on toward the goal instead of restarting from the wave's
    /// spawner. There's no separate "minion" EnemyDefinition to author — the mini copies reuse
    /// whichever EnemyDefinition/prefab the dying enemy itself was spawned from, scaled down by
    /// <see cref="HpMultiplier"/>/<see cref="ScaleMultiplier"/>.
    /// </summary>
    [CreateAssetMenu(fileName = "SplitOnDeathAbility", menuName = "TD/Enemy Abilities/Split On Death")]
    public class SplitOnDeathAbilityDefinition : EnemyAbilityDefinition
    {
        public override EnemyAbilityKind Kind => EnemyAbilityKind.SplitOnDeath;

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

        [Tooltip("Each mini copy's MaxHp = the dying enemy's own MaxHp * this multiplier.")]
        [Range(0.01f, 1f)]
        public float HpMultiplier = 0.5f;

        [Tooltip("Uniform transform scale applied to each mini copy, relative to the normal " +
                 "prefab scale. Requires the enemy prefab's NetworkTransform to sync scale, " +
                 "or the mini will render full-size on remote peers.")]
        [Range(0.1f, 1f)]
        public float ScaleMultiplier = 0.6f;

        [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)
        {
            var def = health.Definition;
            if (def == 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(
                def, SplitCount, atTile, ownerSlot, ScatterRadius, HpMultiplier, ScaleMultiplier);
        }
    }
}