using UnityEngine;

public class EquippableItem : MonoBehaviour
{
    [SerializeField] private WeaponConfig config;
    public WeaponConfig Config => config;

    [Header("--- 데미지 밸런스 ---")]
    [SerializeField] private float lv1Mult = 1.0f;
    [SerializeField] private float lv2Mult = 1.5f;
    [SerializeField] private float lv3Mult = 2.5f;
    // [제거] strengthBonusFactor 변수 삭제

    private Rigidbody _rb;
    private Collider _col;
    private bool _isThrown;
    private int _chargeLevel;
    private Stats _thrower;
    private Vector3 _originalWorldScale;

    private void Awake()
    {
        _rb = GetComponent<Rigidbody>();
        _col = GetComponent<Collider>();
        _originalWorldScale = transform.lossyScale;
    }

    public void OnPickedUp(Transform hand)
    {
        _isThrown = false;
        transform.SetParent(hand);
        transform.localScale = new Vector3(
            _originalWorldScale.x / hand.lossyScale.x,
            _originalWorldScale.y / hand.lossyScale.y,
            _originalWorldScale.z / hand.lossyScale.z
        );
        transform.localPosition = Vector3.zero;
        transform.localRotation = Quaternion.identity;
        if (_rb) _rb.isKinematic = true;
        if (_col) _col.enabled = false;
    }

    public void OnDropped(Vector3 throwDir)
    {
        _isThrown = false;
        transform.SetParent(null);
        transform.localScale = _originalWorldScale;
        if (_rb)
        {
            _rb.isKinematic = false;
            Vector3 force = (throwDir + Vector3.up * 0.5f).normalized * 5f;
            _rb.AddForce(force, ForceMode.Impulse);
            _rb.AddTorque(Random.insideUnitSphere * 3f, ForceMode.Impulse);
        }
        if (_col) _col.enabled = true;
    }

    public void OnThrown(Vector3 dir, float force, int lv, Stats s)
    {
        _isThrown = true;
        _chargeLevel = lv;
        _thrower = s;
        transform.SetParent(null);
        transform.localScale = _originalWorldScale;
        if (_rb)
        {
            _rb.isKinematic = false;
            _rb.AddForce(dir * force, ForceMode.Impulse);
            _rb.AddTorque(transform.right * 10f, ForceMode.Impulse);
        }
        if (_col) _col.enabled = true;
    }

    private void OnCollisionEnter(Collision collision)
    {
        if (!_isThrown) return;
        if (_thrower != null && collision.gameObject == _thrower.gameObject) return;

        if (collision.gameObject.TryGetComponent<IDamageable>(out var target))
        {
            float mult = _chargeLevel == 3 ? lv3Mult : (_chargeLevel == 2 ? lv2Mult : lv1Mult);

            // ✨ [수정] 힘 보너스 로직 제거. (플레이어 기본 공격력 + 무기 대미지) * 차지 배율
            float finalDamage = (_thrower.BaseAttackDamage + config.BaseDamage) * mult;

            target.TakeDamage(finalDamage);
            Debug.Log($"<color=orange>[투척 적중]</color> {collision.gameObject.name}에게 {finalDamage:F1} 데미지!");
            _isThrown = false;
        }

        if (collision.gameObject.layer != LayerMask.NameToLayer("Player")) _isThrown = false;
    }
}