CapersProject/Assets/02.Scripts/Character/Enemy/Boss/BossHealthPoint.cs

using System;
using System.Collections;
using BlueWater.Audios;
using BlueWater.Interfaces;
using BlueWater.Uis;
using BlueWater.Utility;
using UnityEngine;

namespace BlueWater.Enemies.Bosses
{
    public class BossHealthPoint : MonoBehaviour, IDamageable
    {
        // Components
        private CapsuleCollider _characterCollider;
        private SpriteRenderer _spriteRenderer;
        
        // Variables
        public int MaxHealthPoint { get; private set; }

        [field: SerializeField]
        public int CurrentHealthPoint { get; private set; }

        [SerializeField]
        private float _damageInterval = 0.1f;

        private bool _enableTakeDamage = true;
        
        [SerializeField]
        private string _attackedSfxName;
        
        [SerializeField]
        private string _dieSfxName;
        
        [SerializeField]
        private ParticleSystem _attackedParticle;
        
        [SerializeField]
        private ParticleSystem _dieParticle;
        
        [SerializeField]
        private Transform _particleInstantiateLocation;

        private FieldBossHealthPointUi _fieldBossHealthPointUi;
        private WaitForSeconds _flashWhiteWaitTime;
        private Coroutine _flashWhiteCoroutine;
        private Coroutine _damageIntervalCoroutine;

        private bool _enableHealthChangedEvent;
        
        // Hashes
        private static readonly int _isHitHash = Shader.PropertyToID("_IsHit");
        
        // Events
        public event Action<int> OnHealthChanged;
        public event Action OnDead;
        
        // Unity events
        private void Start()
        {
            _flashWhiteWaitTime = new WaitForSeconds(_damageInterval);
        }
        
        private void OnDestroy()
        {
            if (_enableHealthChangedEvent && _fieldBossHealthPointUi)
            {
                OnHealthChanged -= _fieldBossHealthPointUi.SetCurrentHealthPoint;
            }
        }
        
        // Initialize methods
        public void InitializeComponents(bool enableHealthChangedEvent, CapsuleCollider characterCollider,
            SpriteRenderer spriteRenderer, int maxHealthPoint, string bossName, Transform particleInstantiateLocation = null)
        {
            _fieldBossHealthPointUi = CombatUiManager.Instance.FieldBossHealthPointUi;
            _enableHealthChangedEvent = enableHealthChangedEvent;
            if (_enableHealthChangedEvent)
            {
                OnHealthChanged += _fieldBossHealthPointUi.SetCurrentHealthPoint;
                _fieldBossHealthPointUi.SetBoss(maxHealthPoint, bossName);
            }

            _characterCollider = characterCollider;
            _spriteRenderer = spriteRenderer;
            MaxHealthPoint = maxHealthPoint;
            _particleInstantiateLocation = particleInstantiateLocation;
            
            SetCurrentHealthPoint(MaxHealthPoint);
        }
        
        // Events methods
        public void HandleEnableTakeDamage() => _enableTakeDamage = true;
        public void HandleDisableTakeDamage() => _enableTakeDamage = false;
        
        // Methods
        public void SetCurrentHealthPoint(int changedHealthPoint)
        {
            CurrentHealthPoint = changedHealthPoint;
            OnHealthChanged?.Invoke(changedHealthPoint);
        }
        
        public bool CanDamage()
        {
            return _enableTakeDamage;
        }

        public void TakeDamage(int damageAmount)
        {
            HandleDisableTakeDamage();
            var changeHp = Mathf.Max(CurrentHealthPoint - damageAmount, 0);
            SetCurrentHealthPoint(changeHp);
            
            // 죽었는지 체크
            if (changeHp == 0f)
            {
                Die();
                return;
            }
            
            if (_attackedParticle)
            {
                var instantiateHitParticle = Instantiate(_attackedParticle, _characterCollider.bounds.center,
                    _attackedParticle.transform.rotation, _particleInstantiateLocation);
                instantiateHitParticle.Play();
            }
            
            if (!string.IsNullOrEmpty(_attackedSfxName))
            {
                AudioManager.Instance.PlaySfx(_attackedSfxName);
            }

            if (_spriteRenderer.material.HasInt(_isHitHash))
            {
                Utils.StartUniqueCoroutine(this, ref _flashWhiteCoroutine, FlashWhiteCoroutine());
            }
            Utils.StartUniqueCoroutine(this, ref _damageIntervalCoroutine, Utils.CoolDownCoroutine(_damageInterval, EndDamageIntervalCoroutine));
        }
        
        public void TryTakeDamage(int damageAmount)
        {
            if (!CanDamage()) return;

            TakeDamage(damageAmount);
        }
        
        public void Die()
        {
            if (_dieParticle)
            {
                var instantiateHitParticle = Instantiate(_dieParticle, _characterCollider.bounds.center,
                    _dieParticle.transform.rotation, _particleInstantiateLocation);
                instantiateHitParticle.Play();
            }
            
            if (!string.IsNullOrEmpty(_dieSfxName))
            {
                AudioManager.Instance.PlaySfx(_dieSfxName);
            }
            
            OnDead?.Invoke();
        }
        
        private IEnumerator FlashWhiteCoroutine()
        {
            _spriteRenderer.material.SetInt(_isHitHash, 1);
            yield return _flashWhiteWaitTime;
            _spriteRenderer.material.SetInt(_isHitHash, 0);

            Utils.EndUniqueCoroutine(this, ref _flashWhiteCoroutine);
        }

        private void EndDamageIntervalCoroutine()
        {
            Utils.EndUniqueCoroutine(this, ref _damageIntervalCoroutine);
            HandleEnableTakeDamage();
        }
    }
}