#if !UNITY_DOTSRUNTIME && (!UNITY_SERVER || UNITY_EDITOR)
using Unity.Collections;
using Unity.Entities;
using Unity.NetCode;
using Unity.Scenes;
using UnityEngine;
using UnityEngine.UI;

[RequireMatchingQueriesForUpdate]
[WorldSystemFilter(WorldSystemFilterFlags.ServerSimulation | WorldSystemFilterFlags.ClientSimulation)]
public partial class LevelStatusSystem : SystemBase
{
 private Text m_StatusText;
 private Button m_SyncButton;
 private string m_Prefix;
 private bool m_IsServer;

 protected override void OnCreate()
 {
 var levelManager = UnityEngine.GameObject.FindObjectOfType<LevelManager>();
 if (levelManager == null)
 {
 Enabled = false;
 return;
 }
 if (World.IsServer())
 {
 m_StatusText = levelManager.ServerStatus;
 m_SyncButton = levelManager.ServerSyncButton;
 m_IsServer = true;
 }
 else if (World.IsClient())
 {
 m_StatusText = levelManager.ClientStatus;
 m_SyncButton = levelManager.ClientSyncButton;
 }
 else
 {
 Enabled = false;
 }
 m_Prefix = World.Name + " ";
 }

 protected override void OnUpdate()
 {
 var sceneSystem = World.GetExistingSystem<SceneSystem>();
 m_StatusText.text = m_Prefix;
 if (m_IsServer)
 {
 FixedString512Bytes inGame = "";
 bool syncOn = false;
 Entities.ForEach((Entity connEntity, in NetworkId netId) =>
 {
 if (SystemAPI.HasComponent<NetworkStreamInGame>(connEntity))
 {
 var appendMe = FixedString.Format("[{0}]:ON", netId.Value);
 inGame.Append(appendMe);
 syncOn = true;
 }
 else
 {
 var appendMe = FixedString.Format("[{0}]:OFF", netId.Value);
 inGame.Append(appendMe);
 syncOn = false;
 }
 }).Run();
 m_StatusText.text += inGame;
 // Flip toggle to off if it's is on currently but sync is disabled
 if (syncOn)
 m_SyncButton.image.color = Color.gray;
 else
 m_SyncButton.image.color = Color.white;
 }
 else
 {
 if (SystemAPI.HasSingleton<NetworkStreamInGame>())
 {
 m_StatusText.text += "ON";
 m_SyncButton.image.color = Color.gray;
 }
 else
 {
 m_StatusText.text += "OFF";
 m_SyncButton.image.color = Color.white;
 }
 }

 m_StatusText.text += ": ";

 FixedString512Bytes levels = "";
 Entities.WithoutBurst().ForEach((Entity sceneEntity, in SceneReference subscene) =>
 {
 if (SceneSystem.IsSceneLoaded(World.Unmanaged, sceneEntity))
 {
 EntityManager.GetName(sceneEntity, out var debugName);
 if (debugName.IsEmpty)
 levels.Append(subscene.SceneGUID.ToString());
 else
 levels.Append(debugName);
 levels += " ";
 }
 }).Run();
 m_StatusText.text += levels;
 }
}
#endif