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 UnityEngine;

namespace BlueWater.Players
{
    public class PlayerHealthPoint : MonoBehaviour, IDamageable
    {
        // Components
        private SpriteRenderer _spriteRenderer;
        
        // Variables
        [field: SerializeField]
        public int MaxHealthPoint { get; private set; }

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

        [SerializeField]
        private float _damageInterval = 0.5f;

        private bool _enableTakeDamage = true;
        private WaitForSeconds _flashWhiteWaitTime;
        private Coroutine _flashWhiteCoroutine;
        private Coroutine _damageIntervalCoroutine;
        
        // Hashes
        private static readonly int _isHitHash = Shader.PropertyToID("_IsHit");
        
        // Events
        public event Action<int> OnHealthChanged;
        
        // Unity events
        private void Start()
        {
            OnHealthChanged += CombatUiManager.Instance.PlayerHealthPointUi.SetCurrentHealthPoint;

            _flashWhiteWaitTime = new WaitForSeconds(_damageInterval * 0.1f);
            SetCurrentHealthPoint(MaxHealthPoint);
        }
        
        private void OnDestroy()
        {
            if (CombatUiManager.Instance && CombatUiManager.Instance.PlayerHealthPointUi)
            {
                OnHealthChanged -= CombatUiManager.Instance.PlayerHealthPointUi.SetCurrentHealthPoint;
            }
        }
        
        // Initialize methods
        public void InitializeComponents(SpriteRenderer spriteRenderer)
        {
            _spriteRenderer = spriteRenderer;
        }
        
        // Events methods
        public void HandleEnableTakeDamage() => _enableTakeDamage = true;
        public void HandleDisableTakeDamage() => _enableTakeDamage = false;
        
        // Methods
        public void SetCurrentHealthPoint(int changedHealthPoint)
        {
            CurrentHealthPoint = changedHealthPoint;
            OnHealthChanged?.Invoke(changedHealthPoint);
            
            if (CurrentHealthPoint <= 2)
            {
                CombatCameraManager.Instance.LowHpVignette();
            }
            else
            {
                CombatCameraManager.Instance.DefaultHpVignette();
            }
        }

        public bool CanDamage()
        {
            return _enableTakeDamage;
        }

        public void TakeDamage(int damageAmount)
        {
            HandleDisableTakeDamage();
            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(_damageInterval, EndDamageIntervalCoroutine));
        }

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

            TakeDamage(damageAmount);
        }
        
        public void Die()
        {
            // TODO : 죽는걸 확실히 표현한 후 오브젝트 파괴하기
            CombatUiManager.Instance.GameOverPopupUi.Open();
            Destroy(gameObject);
        }
        
        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()
        {
            Utils.EndUniqueCoroutine(this, ref _damageIntervalCoroutine);
            HandleEnableTakeDamage();
        }
    }
}