CapersProject/Assets/02.Scripts/Character/Player/PlayerHealthPoint.cs

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

namespace BlueWater.Players
{
    public class PlayerHealthPoint : MonoBehaviour, IDamageable
    {
        // Components
        [SerializeField]
        private SpriteRenderer _spriteRenderer;

        private IDashable _dashable;
        private ISkillHandler _skillHandler;
        
        // Variables
        [field: SerializeField]
        public int MaxHealthPoint { get; private set; }

        [field: SerializeField]
        public int CurrentHealthPoint { get; private set; }
        
        [field: SerializeField]
        public float InvincibilityDuration { get; private set; } = 0.5f;

        [field: SerializeField]
        public bool IsInvincible { get; private set; }
        private WaitForSeconds _flashWhiteWaitTime;
        private Coroutine _flashWhiteCoroutine;
        private Coroutine _damageIntervalCoroutine;
        private PlayerHealthPointUi _playerHealthPointUi;
        private bool _isQuitting;
        
        // Hashes
        private static readonly int _isHitHash = Shader.PropertyToID("_IsHit");
        
        // Events
        public event Action<int> OnHealthChanged;
        public event Action OnDead;
        
        // Unity events
        private void Awake()
        {
            InitializeComponents();
        }

        private void Start()
        {
            _playerHealthPointUi = FindAnyObjectByType<PlayerHealthPointUi>();
            if (_playerHealthPointUi)
            {
                OnHealthChanged += _playerHealthPointUi.SetCurrentHealthPoint;
            }

            _flashWhiteWaitTime = new WaitForSeconds(InvincibilityDuration * 0.1f);
            SetCurrentHealthPoint(MaxHealthPoint);
        }

        private void OnApplicationQuit()
        {
            _isQuitting = true;
        }

        private void OnDestroy()
        {
            if (_isQuitting || !_playerHealthPointUi) return;
            
            OnHealthChanged -= _playerHealthPointUi.SetCurrentHealthPoint;
        }
        
        // Initialize methods
        [Button("컴포넌트 초기화")]
        private void InitializeComponents()
        {
            _spriteRenderer = GetComponentInChildren<SpriteRenderer>();

            _dashable = GetComponent<IDashable>();
            _skillHandler = GetComponent<ISkillHandler>();
        }
        
        // Methods
        public void SetCurrentHealthPoint(int changedHealthPoint)
        {
            var newChangedHealthPoint = Mathf.Clamp(changedHealthPoint, 0, MaxHealthPoint);
            CurrentHealthPoint = newChangedHealthPoint;
            OnHealthChanged?.Invoke(newChangedHealthPoint);
            
            if (CurrentHealthPoint <= 2)
            {
                PostProcessingManager.Instance.LowHpVignette();
            }
            else
            {
                PostProcessingManager.Instance.DefaultHpVignette();
            }
        }

        public bool CanDamage()
        {
            if (IsInvincible) return false;

            var isDashing = _dashable?.IsDashing ?? false;
            var isActivatingSkill = _skillHandler?.IsActivatingSkill ?? false;

            return !isDashing && !isActivatingSkill;
        }

        public void TakeDamage(int damageAmount)
        {
            IsInvincible = true;
            var changeHp = Mathf.Max(CurrentHealthPoint - damageAmount, 0);
            SetCurrentHealthPoint(changeHp);
            AudioManager.Instance.PlaySfx("CombatPlayerAttacked");
            
            // 죽었는지 체크
            if (changeHp == 0f)
            {
                Die();
                return;
            }

            if (_spriteRenderer.material.HasInt(_isHitHash))
            {
                Utils.StartUniqueCoroutine(this, ref _flashWhiteCoroutine, FlashWhiteCoroutine());
            }
            Utils.StartUniqueCoroutine(this, ref _damageIntervalCoroutine, Utils.CoolDownCoroutine(InvincibilityDuration, EndDamageIntervalCoroutine));
        }

        public void TryTakeDamage(int damageAmount)
        {
            if (!CanDamage()) return;

            TakeDamage(damageAmount);
        }
        
        public void Die()
        {
            OnDead?.Invoke();
        }
        
        private IEnumerator FlashWhiteCoroutine()
        {
            for (var i = 0; i < 5; i++)
            {
                _spriteRenderer.material.SetInt(_isHitHash, 1);
                yield return _flashWhiteWaitTime;
                _spriteRenderer.material.SetInt(_isHitHash, 0);
                yield return _flashWhiteWaitTime;
            }

            Utils.EndUniqueCoroutine(this, ref _flashWhiteCoroutine);
        }

        private void EndDamageIntervalCoroutine()
        {
            IsInvincible = false;
            Utils.EndUniqueCoroutine(this, ref _damageIntervalCoroutine);
        }

        public void ActivateInvincibility() => IsInvincible = true;
        public void DeactivateInvincibility() => IsInvincible = false;
    }
}