using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
[RequireComponent(typeof(Collider))]
public class BouncyInteract : MonoBehaviour
{
	public enum ModelSourceEnum
	{
		Collider = 0,
		Mesh = 1
	}

	public ModelSourceEnum VolumeSource = ModelSourceEnum.Mesh;

	public Transform OvverideCenterOfMass;

	[Range(100f, 1000f)]
	public float Density = 450f;

	[Range(1f, 6f)]
	public int SlicesPerAxisX = 2;

	[Range(1f, 6f)]
	public int SlicesPerAxisY = 2;

	[Range(1f, 6f)]
	public int SlicesPerAxisZ = 2;

	public bool isConcave;

	[Range(2f, 32f)]
	public int VoxelsLimit = 16;

	public float AngularDrag = 0.25f;

	public float Drag = 0.25f;

	[Range(0f, 1f)]
	public float NormalForce = 0.2f;

	public bool DebugForces;

	private const float DAMPFER = 0.1f;

	private const float WATER_DENSITY = 800f;

	private Vector3 localArchimedesForce;

	private List<Vector3> voxels;

	private Vector3[] currentForces;

	private bool isMeshCollider;

	private List<Vector3[]> debugForces;

	private Rigidbody rigidBody;

	private Collider collider;

	private float bounceMaxSize;

	private void OnEnable()
	{
		debugForces = new List<Vector3[]>();
		rigidBody = GetComponent<Rigidbody>();
		collider = GetComponent<Collider>();
		Quaternion rotation = base.transform.rotation;
		Vector3 position = base.transform.position;
		base.transform.rotation = Quaternion.identity;
		base.transform.position = Vector3.zero;
		Bounds bounds = collider.bounds;
		bounceMaxSize = Mathf.Max(bounds.size.x, bounds.size.y, bounds.size.z);
		isMeshCollider = GetComponent<MeshCollider>() != null;
		if ((bool)OvverideCenterOfMass)
		{
			rigidBody.centerOfMass = base.transform.InverseTransformPoint(OvverideCenterOfMass.transform.position);
		}
		rigidBody.angularDrag = AngularDrag;
		rigidBody.drag = Drag;
		voxels = SliceIntoVoxels(isMeshCollider && isConcave);
		currentForces = new Vector3[voxels.Count];
		base.transform.rotation = rotation;
		base.transform.position = position;
		float num = rigidBody.mass / Density;
		WeldPoints(voxels, VoxelsLimit);
		float y = 800f * Mathf.Abs(Physics.gravity.y) * num;
		localArchimedesForce = new Vector3(0f, y, 0f) / voxels.Count;
	}

	private void OnDisable()
	{
	}

	private Bounds GetCurrentBounds()
	{
		Bounds result = default(Bounds);
		if (VolumeSource == ModelSourceEnum.Mesh)
		{
			return GetComponent<Renderer>().bounds;
		}
		if (VolumeSource == ModelSourceEnum.Collider)
		{
			MeshCollider component = GetComponent<MeshCollider>();
			if (component != null)
			{
				return component.sharedMesh.bounds;
			}
			return GetComponent<Collider>().bounds;
		}
		return result;
	}

	private List<Vector3> SliceIntoVoxels(bool concave)
	{
		List<Vector3> list = new List<Vector3>(SlicesPerAxisX * SlicesPerAxisY * SlicesPerAxisZ);
		Bounds currentBounds = GetCurrentBounds();
		if (concave)
		{
			MeshCollider component = GetComponent<MeshCollider>();
			bool convex = component.convex;
			component.convex = false;
			for (int i = 0; i < SlicesPerAxisX; i++)
			{
				for (int j = 0; j < SlicesPerAxisY; j++)
				{
					for (int k = 0; k < SlicesPerAxisZ; k++)
					{
						float x = currentBounds.min.x + currentBounds.size.x / (float)SlicesPerAxisX * (0.5f + (float)i);
						float y = currentBounds.min.y + currentBounds.size.y / (float)SlicesPerAxisY * (0.5f + (float)j);
						float z = currentBounds.min.z + currentBounds.size.z / (float)SlicesPerAxisZ * (0.5f + (float)k);
						Vector3 vector = base.transform.InverseTransformPoint(new Vector3(x, y, z));
						if (PointIsInsideMeshCollider(component, vector))
						{
							list.Add(vector);
						}
					}
				}
			}
			if (list.Count == 0)
			{
				list.Add(currentBounds.center);
			}
			component.convex = convex;
		}
		else
		{
			for (int l = 0; l < SlicesPerAxisX; l++)
			{
				for (int m = 0; m < SlicesPerAxisY; m++)
				{
					for (int n = 0; n < SlicesPerAxisZ; n++)
					{
						float x2 = currentBounds.min.x + currentBounds.size.x / (float)SlicesPerAxisX * (0.5f + (float)l);
						float y2 = currentBounds.min.y + currentBounds.size.y / (float)SlicesPerAxisY * (0.5f + (float)m);
						float z2 = currentBounds.min.z + currentBounds.size.z / (float)SlicesPerAxisZ * (0.5f + (float)n);
						Vector3 item = base.transform.InverseTransformPoint(new Vector3(x2, y2, z2));
						list.Add(item);
					}
				}
			}
		}
		return list;
	}

	private static bool PointIsInsideMeshCollider(Collider c, Vector3 p)
	{
		Vector3[] array = new Vector3[6]
		{
			Vector3.up,
			Vector3.down,
			Vector3.left,
			Vector3.right,
			Vector3.forward,
			Vector3.back
		};
		foreach (Vector3 vector in array)
		{
			if (!c.Raycast(new Ray(p - vector * 1000f, vector), out var _, 1000f))
			{
				return false;
			}
		}
		return true;
	}

	private static void FindClosestPoints(IList<Vector3> list, out int firstIndex, out int secondIndex)
	{
		float num = float.MaxValue;
		float num2 = float.MinValue;
		firstIndex = 0;
		secondIndex = 1;
		for (int i = 0; i < list.Count - 1; i++)
		{
			for (int j = i + 1; j < list.Count; j++)
			{
				float num3 = Vector3.Distance(list[i], list[j]);
				if (num3 < num)
				{
					num = num3;
					firstIndex = i;
					secondIndex = j;
				}
				if (num3 > num2)
				{
					num2 = num3;
				}
			}
		}
	}

	private static void WeldPoints(IList<Vector3> list, int targetCount)
	{
		if (list.Count > 2 && targetCount >= 2)
		{
			while (list.Count > targetCount)
			{
				FindClosestPoints(list, out var firstIndex, out var secondIndex);
				Vector3 item = (list[firstIndex] + list[secondIndex]) * 0.5f;
				list.RemoveAt(secondIndex);
				list.RemoveAt(firstIndex);
				list.Add(item);
			}
		}
	}

	private void FixedUpdate()
	{
		if (DebugForces)
		{
			debugForces.Clear();
		}
		for (int i = 0; i < voxels.Count; i++)
		{
			Vector3 vector = base.transform.TransformPoint(voxels[i]);
			Vector3 zero = Vector3.zero;
			Vector3 vector2 = -rigidBody.GetPointVelocity(vector) * 0.1f * rigidBody.mass;
			float num = 0f - vector.y;
			if (num > 1f)
			{
				num = 1f;
			}
			else if (num < 0f)
			{
				num = 0f;
				vector2 *= 0.2f;
			}
			zero = vector2 + Mathf.Sqrt(num) * localArchimedesForce;
			Vector3 normalized = Vector3.Cross(rhs: 0f * new Vector3(0.01f, 0f, 0f), lhs: 0f * new Vector3(0f, 0f, 0.01f)).normalized;
			zero.x += normalized.x * NormalForce * rigidBody.mass;
			zero.z += normalized.z * NormalForce * rigidBody.mass;
			currentForces[i] = zero * 2f;
			rigidBody.AddForceAtPosition(zero, vector);
			if (DebugForces)
			{
				debugForces.Add(new Vector3[2] { vector, zero });
			}
		}
	}

	private void OnDrawGizmos()
	{
		if (!DebugForces || voxels == null || debugForces == null)
		{
			return;
		}
		float num = 0.02f * bounceMaxSize;
		Gizmos.color = Color.yellow;
		foreach (Vector3 voxel in voxels)
		{
			Gizmos.DrawCube(base.transform.TransformPoint(voxel), new Vector3(num, num, num));
		}
		Gizmos.color = Color.cyan;
		foreach (Vector3[] debugForce in debugForces)
		{
			Gizmos.DrawCube(debugForce[0], new Vector3(num, num, num));
			Gizmos.DrawRay(debugForce[0], debugForce[1] / rigidBody.mass * bounceMaxSize * 0.25f);
		}
	}
}