using System;
using System.Collections.Generic;
using MyUtility;
using UnityEngine;

namespace S_SnapTools
{
	public class S_SnapToObjectPreview : MonoBehaviour
	{
		private Camera m_cam;

		private SphereCollider m_collider;

		private bool m_isDrawUI;

		private float m_relativeScreenSize = 0.2f;

		private Action m_onClick;

		private Material m_uiMaterialLine;

		private Material m_uiMaterialFill;

		private Mesh m_uiMesh;

		private Vector3[] m_uiVerts = new Vector3[30];

		private bool m_isUiMeshIndicesSet;

		private float m_worldRadius = 1f;

		private Camera Cam
		{
			get
			{
				if (m_cam == null)
				{
					m_cam = Camera.main;
				}
				return m_cam;
			}
		}

		public float WorldRadius
		{
			get
			{
				return m_worldRadius;
			}
		}

		public void Init(bool p_isDrawUI, float p_relativeScreenSize, Action p_onClick, Material p_uiMaterialLine, Material p_uiMaterialFill)
		{
			m_isDrawUI = p_isDrawUI;
			m_relativeScreenSize = p_relativeScreenSize;
			m_onClick = p_onClick;
			m_uiMaterialLine = p_uiMaterialLine;
			m_uiMaterialFill = p_uiMaterialFill;
			if (m_isDrawUI && (m_uiMaterialLine == null || m_uiMaterialFill == null))
			{
				Debug.LogError("S_SnapToObjectPreview: Init: IsDrawUI is set to 'true', but no UImaterial was passed!");
			}
		}

		private void Start()
		{
			Renderer[] componentsInChildren = GetComponentsInChildren<Renderer>();
			Vector3 zero = Vector3.zero;
			Renderer[] array = componentsInChildren;
			foreach (Renderer renderer in array)
			{
				zero += renderer.bounds.center;
			}
			zero *= 1f / (float)componentsInChildren.Length;
			m_collider = base.gameObject.AddComponent<SphereCollider>();
			m_collider.center = base.transform.InverseTransformPoint(zero);
			if (m_isDrawUI)
			{
				CreateUIObject();
			}
			if (m_onClick != null)
			{
				UtilityClickTouchDetector utilityClickTouchDetector = base.gameObject.AddComponent<UtilityClickTouchDetector>();
				utilityClickTouchDetector.ColliderInstance = m_collider;
				utilityClickTouchDetector.m_onClick = (Action)Delegate.Combine(utilityClickTouchDetector.m_onClick, m_onClick);
			}
			else
			{
				Debug.LogError("S_SnapToObjectPreview: Start: you have to call 'Init' before 'Start' and pass a valid p_onClick parameter!");
			}
		}

		private void Update()
		{
			if (Cam != null)
			{
				Vector3 vector = Cam.ScreenToWorldPoint(Cam.WorldToScreenPoint(base.transform.position) + Screen.height * Vector3.left * m_relativeScreenSize);
				m_worldRadius = (base.transform.position - vector).magnitude;
				m_collider.radius = 1f / base.transform.lossyScale.magnitude * m_worldRadius;
				UpdateUIVertices();
			}
		}

		private void OnDestroy()
		{
			if (m_uiMesh != null)
			{
				UnityEngine.Object.Destroy(m_uiMesh);
			}
		}

		private void CreateUIObject()
		{
			GameObject gameObject = new GameObject("S_SnapToObjectPreview UI");
			gameObject.transform.parent = base.transform;
			gameObject.transform.localPosition = Vector3.zero;
			gameObject.transform.localRotation = Quaternion.identity;
			gameObject.transform.localScale = Vector3.one;
			m_uiMesh = new Mesh();
			gameObject.AddComponent<MeshFilter>().mesh = m_uiMesh;
			MeshRenderer meshRenderer = gameObject.AddComponent<MeshRenderer>();
			meshRenderer.sharedMaterials = new Material[2] { m_uiMaterialFill, m_uiMaterialLine };
		}

		private void UpdateUIVertices()
		{
			if (!(m_uiMesh != null) || !(m_collider != null) || !(Cam != null))
			{
				return;
			}
			float magnitude = base.transform.lossyScale.magnitude;
			float num = 1.5f * magnitude;
			Vector3 vector = base.transform.TransformPoint(m_collider.center);
			Vector3 vector2 = vector + (vector - Cam.transform.position).normalized * magnitude;
			float num2 = (float)Math.PI / 180f * (360f / (float)m_uiVerts.Length);
			for (int i = 0; i < m_uiVerts.Length; i++)
			{
				float f = (float)i * num2;
				m_uiVerts[i] = base.transform.InverseTransformPoint(vector2 + Cam.transform.TransformDirection(new Vector3(Mathf.Sin(f), Mathf.Cos(f), 0f)) * num);
			}
			m_uiMesh.vertices = m_uiVerts;
			if (!m_isUiMeshIndicesSet)
			{
				m_isUiMeshIndicesSet = true;
				m_uiMesh.subMeshCount = 2;
				List<int> list = new List<int>();
				List<int> list2 = new List<int>();
				for (int j = 0; j < m_uiVerts.Length; j++)
				{
					if (j + 2 < m_uiVerts.Length)
					{
						list.Add(0);
						list.Add(j + 1);
						list.Add(j + 2);
					}
					list2.Add(j);
				}
				list2.Add(0);
				m_uiMesh.SetIndices(list.ToArray(), MeshTopology.Triangles, 0);
				m_uiMesh.SetIndices(list2.ToArray(), MeshTopology.LineStrip, 1);
			}
			m_uiMesh.RecalculateBounds();
		}
	}
}