CapersProject/Assets/02.Scripts/ProjectileController.cs

using System;
using BlueWater.Interfaces;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.Serialization;

namespace BlueWater
{
    public class ProjectileController : MonoBehaviour
    {
        [Title("컴포넌트")]
        [SerializeField, Required]
        private Rigidbody _rigidbody;
        
        [SerializeField]
        private SphereCollider _sphereCollider;
        
        [field: Title("파티클 설정")]
        [FormerlySerializedAs("_projectileParticle")]
        [SerializeField]
        private GameObject _projectilePrefab;
        
        [SerializeField]
        private GameObject _muzzleParticle;
        
        [field: SerializeField]
        public GameObject ImpactParticle { get; private set; }
        
        [Title("충돌체 설정")]
        [SerializeField, Tooltip("Sphere Collider가 없는 경우, 기본 충돌 크기(반지름)"), ShowIf("@!_sphereCollider")]
        private float _colliderRadius = 1f;
        [SerializeField, Range(0f, 1f), Tooltip("타겟보다 해당 값만큼 떨어진 위치에서 충돌")]
        private float _collideOffset;
        
        [SerializeField]
        private int _attackDamage;

        [SerializeField]
        private LayerMask _targetLayer;
        
        [SerializeField]
        private bool _useAutoDestroy = true;
        
        [SerializeField, ShowIf("@_useAutoDestroy")]
        private float _autoDestroyTime = 10f;
        
        private float _detectionDistance;
        
        public Action OnHitAction;
        
        private void OnDrawGizmosSelected()
        {
            var radius = _sphereCollider ? _sphereCollider.radius : _colliderRadius;
            var direction = _rigidbody ? _rigidbody.linearVelocity.normalized : transform.forward;
            
            Gizmos.color = Color.red;
            Gizmos.DrawWireSphere(transform.position, radius);
            Gizmos.DrawLine(transform.position, transform.position + direction * _detectionDistance);
        }

        private void Start()
        {
            if (_useAutoDestroy)
            {
                Destroy(gameObject, _autoDestroyTime);
            }

            if (_projectilePrefab)
            {
                _projectilePrefab = Instantiate(_projectilePrefab, transform.position, transform.rotation, transform);
            }
            
            if (_muzzleParticle)
            {
                _muzzleParticle = Instantiate(_muzzleParticle, transform.position, transform.rotation, transform);
                Destroy(_muzzleParticle, 1.5f);
            }
        }
		
        private void FixedUpdate()
        {	
			if (_rigidbody.linearVelocity.magnitude != 0)
			{
			    transform.rotation = Quaternion.LookRotation(_rigidbody.linearVelocity);
			}

            var radius = _sphereCollider ? _sphereCollider.radius : _colliderRadius;
            var direction = _rigidbody.linearVelocity.normalized;
            
            _detectionDistance = _rigidbody.linearVelocity.magnitude * Time.deltaTime;
            if (!Physics.SphereCast(transform.position, radius, direction, out var raycastHit, _detectionDistance,
                    _targetLayer, QueryTriggerInteraction.Collide)) return;

            transform.position = raycastHit.point + raycastHit.normal * _collideOffset;
            var trailParticles = GetComponentsInChildren<ParticleSystem>();
            foreach (var element in trailParticles)
            {
                if (!element.gameObject.name.Contains("Trail")) continue;
                
                element.transform.SetParent(null);
                Destroy(element.gameObject, 2f);
            }
            
            GameObject impactParticle = null;
            // TODO : HitBox가 레이어로 설정되어있으도, 부모 객체 Player를 계속 가져오는 버그가 있음
            var hitTransform = raycastHit.transform;
            var iDamageable = hitTransform.GetComponentInParent<IDamageable>();
            if (iDamageable != null && iDamageable.CanDamage())
            {
                impactParticle = Instantiate(ImpactParticle, transform.position, Quaternion.FromToRotation(Vector3.up, raycastHit.normal));
                iDamageable.TakeDamage(_attackDamage);
                OnHitAction?.Invoke();
            }

            Destroy(_projectilePrefab, 3f);
            if (impactParticle)
            {
                Destroy(impactParticle, 3.5f);
            }
            Destroy(gameObject);
        }

        public void Initialize(int attackDamage, LayerMask targetLayer, Action onHitAction = null)
        {
            _attackDamage = attackDamage;
            _targetLayer = targetLayer;
            OnHitAction = onHitAction;
        }

        public void AddForce(Vector3 force, ForceMode forceMode) => _rigidbody.AddForce(force, forceMode);
    }
}