using System.Numerics;
using UnityEngine;

namespace Skill_V2
{
    [CreateAssetMenu(fileName = "SpawnBullet", menuName = "ScriptableObject/Skill/SkillSequence/SpawnBullet")]
    public class SpawnBullet : SkillSequence
    {
        [SerializeField] StraightBullet bulletPrefab;

        StraightBullet bulletInstance;
        BigInteger skillDmg;

        public override void Enter()
        {
            bulletInstance = Instantiate(bulletPrefab, Owner.CenterPivot, UnityEngine.Quaternion.identity);
            bulletInstance.OnEnterCollider += HandleCollide;

            if (TargetFinder.TryFindNearest(Owner.CenterPivot, Owner.TargetTags, out var target))
            {
                bulletInstance.Fire((target as Entity).CenterPivotTransform);
            }
            else
            {
                bulletInstance.HeadDirection = Owner.LookDirection;
                bulletInstance.Fire();
            }

            skillDmg = Owner.GetSkillDamage();

            IsDone = true;
        }

        public override void Stop()
        {
            if (bulletInstance != null)
            {
                Destroy(bulletInstance.gameObject);
            }

            bulletInstance = null;
        }

        private void HandleCollide(Entity other)
        {
            if (other.HasTagsAny(Owner.TargetTags) && other is IBattleEntity target)
            {
                BattleMgr.Instance.SendDamage(target, skillDmg, 0, 0);
            }
        }
    }
}