using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering.HighDefinition;

public class FishFX : WaterFXInstance
{
	private struct DecalInstanceData
	{
		public WaterDecal Decal;

		public float StartTime;

		public float StartAmplitude;
	}

	[SerializeField]
	private WaterDecal _decalPrefab;

	[SerializeField]
	private float _splashSizeMultiplier = 0.1f;

	[SerializeField]
	private float _maxFishDepth = -0.2f;

	private FishController _fishController;

	private WaterBody _waterBody;

	private const float INTERVAL = 0.05f;

	private float _time;

	private List<DecalInstanceData> _activeDecals;

	private void Awake()
	{
		_fishController = GetComponent<FishController>();
		_waterBody = GetComponent<WaterBody>();
		WaterBody waterBody = _waterBody;
		waterBody.OnWaterChangeState = (Action<bool>)Delegate.Combine(waterBody.OnWaterChangeState, new Action<bool>(OnWaterEnterExit));
		_activeDecals = new List<DecalInstanceData>();
		IsVisible = false;
	}

	private void Start()
	{
		Init();
		_pool = _manager.GetPool(_decalPrefab);
	}

	protected override void OnDestroy()
	{
		base.OnDestroy();
		base.Deactivate();
		WaterBody waterBody = _waterBody;
		waterBody.OnWaterChangeState = (Action<bool>)Delegate.Remove(waterBody.OnWaterChangeState, new Action<bool>(OnWaterEnterExit));
	}

	private void OnWaterEnterExit(bool inWater)
	{
		if (inWater)
		{
			_manager.CreateSplash(base.transform.position, _splashSizeMultiplier * _fishController.Mass);
		}
	}

	public override void BatchUpdate()
	{
		UpdateFX();
	}

	public override void UpdateFX()
	{
		float num = 0f;
		for (int num2 = _activeDecals.Count - 1; num2 >= 0; num2--)
		{
			num = Mathf.Clamp01((Time.realtimeSinceStartup - _activeDecals[num2].StartTime) * _decalDecaySpeed);
			if (num >= 1f)
			{
				_pool.Reclaim(_activeDecals[num2].Decal);
				_activeDecals.RemoveAt(num2);
			}
			else
			{
				_activeDecals[num2].Decal.amplitude = (1f - num) * _activeDecals[num2].StartAmplitude;
				_activeDecals[num2].Decal.transform.localScale = new Vector3(num + 0.1f, 1f, num + 0.1f);
			}
		}
		_time += Time.deltaTime;
		if (IsVisible && !(_time < 0.05f) && !(base.transform.position.y < _maxFishDepth) && !(_fishController.Velocity.sqrMagnitude <= 2f))
		{
			_time = 0f;
			WaterDecal instance = _pool.GetInstance();
			instance.amplitude = _decalAmplitude;
			instance.transform.position = base.transform.position;
			instance.transform.rotation = Quaternion.identity;
			instance.transform.localScale = Vector3.zero;
			instance.gameObject.SetActive(value: true);
			_activeDecals.Add(new DecalInstanceData
			{
				Decal = instance,
				StartTime = Time.realtimeSinceStartup,
				StartAmplitude = _decalAmplitude * (0f - Mathf.Lerp(_maxFishDepth, 0f, base.transform.position.y))
			});
		}
	}
}