CapersProject/Assets/02.Scripts/Item/DropItemController.cs

using System.Collections;
using BlueWater.Players.Combat;
using Sirenix.OdinInspector;
using UnityEngine;

namespace BlueWater.Items
{
    public class DropItemController : MonoBehaviour
    {
        [Title("컴포넌트")]
        [SerializeField]
        private Rigidbody _rigidbody;
        
        [SerializeField]
        private Collider _collider;
        
        [SerializeField]
        private SpriteRenderer _spriteRenderer;
        
        [Title("자동 파괴")]
        [SerializeField]
        private bool _useAutoDestroy = true;
        
        [SerializeField, ShowIf("@_useAutoDestroy")]
        private float _autoDestroyTime = 30f;
        
        [Title("획득")]
        [SerializeField]
        private bool _drawGizmos = true;
        
        [SerializeField]
        private float _distance = 5f;
        
        [SerializeField]
        private float _acquisitionTime = 1f;

        private ItemSlot _itemSlot;
        private Collider _targetCollider;
        private readonly WaitForSeconds _lootCoroutineTime = new(0.5f);

        private void OnDrawGizmosSelected()
        {
            if (!_drawGizmos) return;
            
            Gizmos.DrawWireSphere(transform.position, _distance);
        }
        
        private void Start()
        {
            if (_useAutoDestroy)
            {
                Destroy(gameObject, _autoDestroyTime);
            }

            StartCoroutine(LootCoroutine());
        }
        
        public void Initialize(ItemSlot itemSlotValue)
        {
            _itemSlot = itemSlotValue;
            if (_spriteRenderer)
            {
                _spriteRenderer.sprite = ItemManager.Instance.ItemDictionary[_itemSlot.Idx].Sprite;
            }
        }

        private IEnumerator LootCoroutine()
        {
            while (true)
            {
                _targetCollider ??= FindAnyObjectByType<CombatPlayer>().GetComponent<Collider>();
                if (_targetCollider == null)
                {
                    yield return _lootCoroutineTime;
                    continue;
                }
                
                var targetDistance = Vector3.Distance(_targetCollider.transform.position, transform.position);
                if (targetDistance <= _distance) break;
                
                yield return _lootCoroutineTime;
            }
            
            if (_rigidbody)
            {
                _rigidbody.isKinematic = true;
                _rigidbody.useGravity = false;
            }
            if (_collider)
            {
                _collider.enabled = false;
            }
            
            var startPosition = transform.position;
            var elapsedTime = 0f;
            
            while (elapsedTime < _acquisitionTime)
            {
                if (_targetCollider == null)
                {
                    yield break;
                }
                elapsedTime += Time.deltaTime;
                var t = elapsedTime / _acquisitionTime;
                t = Mathf.SmoothStep(0f, 1f, t);

                transform.parent.position = Vector3.Lerp(startPosition, _targetCollider.bounds.center, t);
                yield return null;
            }

            ItemManager.Instance.Acquire(_itemSlot);
            Destroy(gameObject);
        }
    }
}