using System.Linq;
using Es.InkPainter.Effective;
using UnityEngine;

namespace Es.InkPainter.Sample
{
	[RequireComponent(typeof(Collider))]
	public class CollisionReflectionPainter : MonoBehaviour
	{
		[SerializeField]
		private Brush brush;

		[SerializeField]
		private Camera cam;

		[SerializeField]
		private Vector3 offset;

		[SerializeField]
		private bool debugMode;

		private RenderTexture rt;

		private RenderTexture debug;

		public void OnGUI()
		{
			if (debugMode)
			{
				GUI.Box(new Rect(0f, 0f, 200f, 200f), "ReflectionImage");
				GUI.DrawTexture(new Rect(0f, 0f, 200f, 200f), debug);
			}
		}

		private void Awake()
		{
			rt = RenderTexture.GetTemporary(Screen.width, Screen.height, 16);
			if (debugMode)
			{
				debug = new RenderTexture(brush.BrushTexture.width, brush.BrushTexture.height, 16);
			}
			cam.targetTexture = rt;
		}

		public void OnDestroy()
		{
			RenderTexture.ReleaseTemporary(rt);
		}

		public void OnCollisionStay(Collision collision)
		{
			if (!(cam == null) && collision.contacts.Any((ContactPoint p) => p.otherCollider.GetComponent<InkCanvas>() != null))
			{
				cam.transform.position = base.transform.position + offset;
				ContactPoint contactPoint = collision.contacts.First((ContactPoint p) => p.otherCollider.GetComponent<InkCanvas>() != null);
				InkCanvas component = contactPoint.otherCollider.GetComponent<InkCanvas>();
				RenderTexture temporary = RenderTexture.GetTemporary(brush.BrushTexture.width, brush.BrushTexture.height);
				GrabArea.Clip(brush.BrushTexture, brush.Scale, rt, Vector3.one * 0.5f, brush.RotateAngle, GrabArea.GrabTextureWrapMode.Clamp, temporary);
				ReverseUV.Vertical(temporary, temporary);
				if (debugMode)
				{
					Graphics.Blit(temporary, debug);
				}
				Texture brushTexture = brush.BrushTexture;
				brush.BrushTexture = temporary;
				component.Paint(brush, contactPoint.point);
				RenderTexture.ReleaseTemporary(temporary);
				brush.BrushTexture = brushTexture;
			}
		}
	}
}