BITFALL/Assets/Artists/Scripts/Entities/Knockdown/EntityKnockdown.cs

using System;
using System.Collections;
using System.Collections.Generic;
using BITFALL.Entities.Inventory;
using BITFALL.Items;
using BITKit;
using BITKit.Entities;
using UnityEditor;
using UnityEngine;

namespace BITFALL.Entities
{
	[CustomType(typeof(IKnockdown))]
	public sealed class EntityKnockdown :EntityBehavior,IKnockdown
	{
		[SerializeField] private int knockedHealth;
		[SerializeField] private int initialKnockedHealth;

		[SerializeField] private Optional<float> invincibilityTimes;
		
		public int KnockedHealth=>knockedHealth;
		public int InitialKnockedHealth
		{
			get => initialKnockedHealth;
			set => initialKnockedHealth = value;
		}
		public event Action OnKnockdown;
		public event Action OnRevive;
		public bool IsKnockdown { get;private set; }
		private readonly Optional<int> knockedHeal=new();
		private readonly IntervalUpdate invincibilityInterval = new();
		
		[Inject]
		private IHealth _health;
		
		[Inject]
		private IEntityInventory _inventory;

		public override void OnStart()
		{
			_health.OnDamageFactory += OnDamageFactory;
			_health.OnSetAlive += OnSetAlive;
			_health.OnSetHealthPoint += OnSetHealthPoint;
			
			_inventory.OnUsedItem += OnUseItem;
		}

		private void OnSetHealthPoint(int obj)
		{
			if (obj <= 0 || !IsKnockdown || !_health.IsAlive) return;
			IsKnockdown = false;
			OnRevive?.Invoke();
		}
		private void OnUseItem(IBasicItem arg)
		{
			if (IsKnockdown is false ||
			    arg.GetAssetable().TryGetProperty<PlayerReviveItem>(out var reviveItem) is false) return;
			IsKnockdown = false;
			OnRevive?.Invoke();
		
		}

		private void OnSetAlive(bool obj)
		{
			IsKnockdown = false;
		}

		private int OnDamageFactory(DamageMessage arg,int currentDamage)
		{
			if (invincibilityTimes.Allow && invincibilityInterval.AllowUpdateWithoutReset is false)
			{
				return 0;
			}
			if (IsKnockdown || _health.HealthPoint - currentDamage >=0 ) return currentDamage;
			IsKnockdown = true;
			if (invincibilityTimes.Allow)
			{
				invincibilityInterval.Interval = invincibilityTimes.Value;
				invincibilityInterval.Reset();
			}
			OnKnockdown?.Invoke();
			_health.HealthPoint = 0;
			return 0;
		}
	}

}