OldBlueWater/BlueWater/Assets/02.Scripts/Arrow.cs

using System;
using System.Collections;
using UnityEngine;
using UnityEngine.Pool;

// ReSharper disable once CheckNamespace
namespace BlueWaterProject
{
    public class Arrow : MonoBehaviour
    {
        #region Property and variable

        [Tooltip("발사 이후 자동으로 사라지는데 까지 걸리는 시간")]
        [Range(0f, 10f)]
        [SerializeField] private float autoDestroyTime;

        [Tooltip("화살이 날아가는 속도")]
        [SerializeField] private float arrowSpeed = 15f;

        private float g = Mathf.Abs(Physics.gravity.y);
        private Vector3 targetPos;
        private AttackerType attackerType;
        private float inaccuracy;

        private Transform attackerTransform;
        private AiStat attackerStat;
        private Rigidbody arrowRigidbody;
        private IObjectPool<Arrow> managedArrowPool;

        #endregion

        #region Unity built-in function

        private void Awake()
        {
            arrowRigidbody = Utils.GetComponentAndAssert<Rigidbody>(transform);
        }

        private void OnTriggerEnter(Collider other)
        {
            print(other.gameObject.name);
            if (other.gameObject.layer == LayerMask.NameToLayer("Ground") ||
                other.gameObject.layer == LayerMask.NameToLayer("Water"))
            {
                DestroyObject();
            }
            else if (other.gameObject.layer == LayerMask.NameToLayer("HitBox"))
            {
                switch (attackerType)
                {
                    case AttackerType.NONE:
                        break;
                    case AttackerType.PLAYER:
                        if (!other.gameObject.CompareTag("Enemy"))
                        {
                            return;
                        }
                        break;
                    case AttackerType.PIRATE:
                        if (!other.gameObject.CompareTag("Enemy"))
                        {
                            return;
                        }
                        break;
                    case AttackerType.ENEMY:
                        if (!other.gameObject.CompareTag("Player") || !other.gameObject.CompareTag("Pirate"))
                        {
                            return;
                        }
                        break;
                    default:
                        throw new ArgumentOutOfRangeException();
                }
                var iDamageable = other.transform.parent.GetComponent<IDamageable>();
                print(iDamageable);

                iDamageable.TakeDamage(attackerStat, iDamageable.AiStat);
                DestroyObject();
            }
        }

        #endregion
        
        #region Custom function

        public IEnumerator Shoot()
        {
            var time = 0f;
            var inaccuracyOffset = new Vector3(
                UnityEngine.Random.Range(-inaccuracy, inaccuracy),
                UnityEngine.Random.Range(-inaccuracy, inaccuracy),
                UnityEngine.Random.Range(-inaccuracy, inaccuracy)
            );
            var inaccurateTargetPos = targetPos + inaccuracyOffset;
            
            transform.rotation = Quaternion.LookRotation(inaccurateTargetPos);
            transform.rotation *= Quaternion.Euler(0f, -90f, 0f);
            

            while (time < autoDestroyTime)
            {
                var myPos = transform.position;
                var toTargetFlat = new Vector3(inaccurateTargetPos.x - myPos.x, 0, inaccurateTargetPos.z - myPos.z);
                var horizontalDistance = toTargetFlat.magnitude;
                var timeToTarget = horizontalDistance / arrowSpeed;
                
                var yOffset = targetPos.y - myPos.y;
                
                var initialVerticalSpeed = (yOffset + (0.5f * g * timeToTarget * timeToTarget)) / timeToTarget;

                var launchVelocity = toTargetFlat.normalized * arrowSpeed + Vector3.up * initialVerticalSpeed;
                arrowRigidbody.velocity = launchVelocity;
                
                transform.rotation = Quaternion.LookRotation(arrowRigidbody.velocity);
                transform.rotation *= Quaternion.Euler(0f, -90f, 0f);
                
                
                yield return null;
            }

            if (gameObject.activeSelf)
            {
                DestroyObject();
            }
        }

        public void SetShootingArrow(Vector3 shootPos, Vector3 targetPosition, AiStat attackerAiStat, AttackerType type, float inaccuracyValue)
        {
            transform.position = shootPos;
            targetPos = targetPosition;
            attackerStat = attackerAiStat;
            attackerType = type;
            inaccuracy = inaccuracyValue;
        }

        #endregion
        
        
        #region ObjectPool function

        private void DestroyObject() => managedArrowPool.Release(this);

        public void SetManagedPool(IObjectPool<Arrow> pool) => managedArrowPool = pool;

        #endregion

        #region Custom function

        public void ReleaseArrowSetting()
        {
            StopAllCoroutines();
            gameObject.SetActive(false);
            arrowRigidbody.velocity = Vector3.zero;
            arrowRigidbody.angularVelocity = Vector3.zero;
        }

        #endregion
    }
}