using UnityEngine;

public class PlayerInteraction : MonoBehaviour
{
    [Header("--- 설정 ---")]
    [SerializeField] private float interactRange = 3f;
    [SerializeField] private LayerMask itemLayer;
    [SerializeField] private Transform handSlot;
    [SerializeField] private Stats playerStats;

    private EquippableItem _currentWeapon;
    public EquippableItem CurrentWeapon => _currentWeapon;

    public void TryInteract()
    {
        Collider[] hits = Physics.OverlapSphere(transform.position, interactRange, itemLayer);
        foreach (var hit in hits)
        {
            // 🏹 [새로 추가] 화살 아이템 습득
            if (hit.TryGetComponent<ArrowItem>(out var arrowItem))
            {
                PickupArrow(arrowItem);
                break;
            }

            // 기존 무기 습득
            if (hit.TryGetComponent<EquippableItem>(out var item))
            {
                if (playerStats.Strength >= item.Config.RequiredStrength)
                {
                    EquipWeapon(item);
                    break;
                }
                else { CinemachineShake.Instance?.ShakeNoNo(); continue; }
            }

            // 기존 포션/제단
            if (hit.TryGetComponent<HealthPotion>(out var potion)) { potion.Use(GetComponent<PlayerHealth>()); break; }
            if (hit.TryGetComponent<HealthAltar>(out var altar)) { altar.Use(GetComponent<PlayerHealth>()); break; }
        }
    }

    // 🏹 [새 함수] 화살 습득 처리
    private void PickupArrow(ArrowItem arrowItem)
    {
        if (arrowItem == null) return;

        // PlayerAttack 찾아서 화살 교체
        PlayerAttack playerAttack = GetComponent<PlayerAttack>();
        if (playerAttack != null)
        {
            arrowItem.Pickup(playerAttack);
        }
        else
        {
            Debug.LogWarning("PlayerAttack 컴포넌트를 찾을 수 없습니다!");
        }
    }

    private void EquipWeapon(EquippableItem item)
    {
        if (_currentWeapon != null) _currentWeapon.OnDropped(transform.forward);
        _currentWeapon = item;
        _currentWeapon.OnPickedUp(handSlot);

        if (playerStats != null)
        {
            playerStats.weaponDamage = item.Config.BaseDamage;
            playerStats.UpdateWeaponWeight(item.Config.RequiredStrength);
        }

        // ⭐ 무기 장착 즉시 UI 갱신
        FindObjectOfType<PlayerStatsUI>()?.UpdateStatTexts();
    }

    public void ClearCurrentWeapon()
    {
        _currentWeapon = null;
        if (playerStats != null)
        {
            playerStats.weaponDamage = 0;
            playerStats.ResetWeight();

            // ⭐ 무기 제거 즉시 UI 갱신
            FindObjectOfType<PlayerStatsUI>()?.UpdateStatTexts();
        }
    }
}