using System.Collections;
using UnityEngine;
using UnityEngine.XR;
using UnityEngine.XR.Management;
using UnityEngine.XR.OpenXR;

namespace BlockSpace.Voxels
{
	internal static class OpenXRDesktopFallback
	{
		private sealed class OpenXRDesktopFallbackRunner : MonoBehaviour
		{
			private bool started;

			private IEnumerator Start()
			{
				if (started)
				{
					yield break;
				}
				started = true;
				float waitTime = 2f;
				float timer = 0f;
				while (timer < waitTime)
				{
					if (XRSettings.isDeviceActive)
					{
						Debug.Log("XR already active. Skipping fallback.");
						yield break;
					}
					timer += Time.unscaledDeltaTime;
					yield return null;
				}
				XRGeneralSettings instance = XRGeneralSettings.Instance;
				XRManagerSettings manager = ((instance != null) ? instance.Manager : null);
				if (manager == null)
				{
					Debug.LogWarning("No XR Manager found. Staying in desktop mode.");
					yield break;
				}
				if (manager.activeLoader != null || XRSettings.isDeviceActive)
				{
					Debug.Log("XR initialized during wait. No fallback needed.");
					yield break;
				}
				Debug.Log("XR not initialized. Attempting manual initialization...");
				yield return manager.InitializeLoader();
				if (manager.activeLoader != null)
				{
					manager.StartSubsystems();
					if (XRSettings.isDeviceActive)
					{
						Debug.Log("XR successfully initialized via fallback.");
					}
					else
					{
						Debug.LogWarning("Loader started but no XR device active.");
					}
				}
				else
				{
					Debug.Log("OpenXR failed to initialize. Running in desktop mode.");
				}
			}
		}

		private static bool installed;

		private static bool runnerCreated;

		[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
		private static void Install()
		{
			if (!installed)
			{
				installed = true;
				OpenXRRuntime.retryInitializationOnFormFactorErrors = false;
				OpenXRRuntime.wantsToQuit += PreventForcedQuit;
				OpenXRRuntime.wantsToRestart += PreventForcedRestart;
			}
		}

		[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
		private static void CreateRunner()
		{
			if (!runnerCreated)
			{
				runnerCreated = true;
				GameObject gameObject = new GameObject("OpenXRDesktopFallback");
				Object.DontDestroyOnLoad(gameObject);
				gameObject.hideFlags = HideFlags.HideAndDontSave;
				gameObject.AddComponent<OpenXRDesktopFallbackRunner>();
			}
		}

		private static bool PreventForcedQuit()
		{
			Debug.LogWarning("OpenXR requested application quit. Ignoring for desktop fallback.");
			return false;
		}

		private static bool PreventForcedRestart()
		{
			Debug.LogWarning("OpenXR requested restart. Ignoring for desktop fallback.");
			return false;
		}
	}
}