using System;
using UnityEngine;
using UnityEngine.Serialization;

namespace UltimateWater.Internal
{
	[RequireComponent(typeof(Renderer))]
	public sealed class WaterSimpleMask : MonoBehaviour
	{
		[FormerlySerializedAs("water")]
		[SerializeField]
		private Water _Water;

		[FormerlySerializedAs("renderQueuePriority")]
		[SerializeField]
		private int _RenderQueuePriority;

		private const string _WaterIdName = "_WaterId";

		public Renderer Renderer { get; private set; }

		public int RenderQueuePriority
		{
			get
			{
				return _RenderQueuePriority;
			}
		}

		public Water Water
		{
			get
			{
				return _Water;
			}
			set
			{
				if (!(_Water == value))
				{
					base.enabled = false;
					_Water = value;
					base.enabled = true;
				}
			}
		}

		private void OnValidate()
		{
			SetObjectLayer();
		}

		private void OnEnable()
		{
			Renderer = GetComponent<Renderer>();
			Renderer.enabled = false;
			Renderer.material.SetFloat("_WaterId", 1 << _Water.WaterId);
			SetObjectLayer();
			if (Renderer == null)
			{
				throw new InvalidOperationException("WaterSimpleMask is attached to an object without any renderer.");
			}
			_Water.Renderer.AddMask(this);
			_Water.WaterIdChanged += OnWaterIdChanged;
		}

		private void OnDisable()
		{
			_Water.WaterIdChanged -= OnWaterIdChanged;
			_Water.Renderer.RemoveMask(this);
		}

		private void SetObjectLayer()
		{
			if (base.gameObject.layer != WaterProjectSettings.Instance.WaterTempLayer)
			{
				base.gameObject.layer = WaterProjectSettings.Instance.WaterTempLayer;
			}
		}

		private void OnWaterIdChanged()
		{
			Renderer component = GetComponent<Renderer>();
			component.material.SetFloat("_WaterId", 1 << _Water.WaterId);
		}
	}
}