using System;
using LE_LevelEditor.Core;
using LE_LevelEditor.Logic;
using LE_LevelEditor.UI;
using S_SnapTools;
using UnityEngine;

namespace LE_LevelEditor.Commands
{
	public class LE_CmdSnapObjectToObject : LE_CmdBase
	{
		private LE_GUI3dObject m_gui3d;

		private LE_CmdObjectLink m_sourceObj;

		private LE_CmdObjectLink m_snappedObj = new LE_CmdObjectLink();

		private int m_sourceSnapPointIndex;

		private S_SnapToObjectPrefab m_snapPrefab;

		public LE_CmdSnapObjectToObject(LE_GUI3dObject p_gui3d, int p_sourceObjUID, int p_sourceSnapPointIndex, S_SnapToObjectPrefab p_snapPrefab)
		{
			m_gui3d = p_gui3d;
			m_sourceObj = new LE_CmdObjectLink(p_sourceObjUID);
			m_sourceSnapPointIndex = p_sourceSnapPointIndex;
			m_snapPrefab = p_snapPrefab;
		}

		public override long GetStoredBytes()
		{
			return 30L;
		}

		public override bool Execute()
		{
			if (!base.Execute())
			{
				return false;
			}
			if (m_snapPrefab == null)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: Execute: could not execute, m_snapPrefab is null!");
				return false;
			}
			if (m_sourceObj.Obj == null)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: Execute: could not execute, m_sourceObj is null!");
				return false;
			}
			if (m_sourceSnapPointIndex >= m_sourceObj.Obj.ObjectSnapPoints.Length)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: Execute: could not execute, m_sourceSnapPointIndex('" + m_sourceSnapPointIndex + "') is not a valid[0," + (m_sourceObj.Obj.ObjectSnapPoints.Length - 1) + "] snap point index!");
				return false;
			}
			S_SnapToObject snapSystemInstance = m_sourceObj.Obj.ObjectSnapPoints[m_sourceSnapPointIndex].SnapSystemInstance;
			if (snapSystemInstance == null)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: Execute: could not execute, m_sourceSnapPointIndex('" + m_sourceSnapPointIndex + "') leads to a null SnapSystemInstance!");
				return false;
			}
			snapSystemInstance.OnAfterObjectSnapped = (EventHandler<S_SnapToObjectEventArgs>)Delegate.Combine(snapSystemInstance.OnAfterObjectSnapped, new EventHandler<S_SnapToObjectEventArgs>(OnAfterObjectSnapped));
			snapSystemInstance.PlacePrefab(m_snapPrefab);
			snapSystemInstance.OnAfterObjectSnapped = (EventHandler<S_SnapToObjectEventArgs>)Delegate.Remove(snapSystemInstance.OnAfterObjectSnapped, new EventHandler<S_SnapToObjectEventArgs>(OnAfterObjectSnapped));
			return true;
		}

		public override bool Rollback()
		{
			if (!base.Rollback())
			{
				return false;
			}
			if (m_snappedObj.Obj == null)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: Rollback: could not rollback, m_snappedObj is null!");
				return false;
			}
			if (m_gui3d == null)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: Rollback: could not rollback, m_gui3d is null!");
				return false;
			}
			LE_LogicObjects.DeleteObject(m_gui3d, m_snappedObj.Obj);
			return true;
		}

		private void OnAfterObjectSnapped(object p_sender, S_SnapToObjectEventArgs p_args)
		{
			if (m_gui3d == null)
			{
				Debug.LogError("LE_CmdSnapObjectToObject: OnAfterObjectSnapped: m_gui3d is null!");
				return;
			}
			LE_Object component = p_args.NewInstance.GetComponent<LE_Object>();
			if (component != null)
			{
				if (m_snappedObj.UID > 0)
				{
					component.UID = m_snappedObj.UID;
				}
				m_snappedObj.Obj = component;
				LE_LogicObjects.OnNewObjectSnapped(m_gui3d, component, p_args);
			}
			else
			{
				Debug.LogError("LE_CmdSnapObjectToObject: OnAfterObjectSnapped: LE_Object is not attached to the root of the new object! This object will not be saved if it has no LE_Object attached!");
			}
		}
	}
}