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// Copyright (c) (2024) Magic Leap, Inc. All Rights Reserved.
// Use of this file is governed by the Software License Agreement, located here: https://www.magicleap.com/software-license-agreement-ml2
// Terms and conditions applicable to third-party materials accompanying this distribution may also be found in the top-level NOTICE file appearing herein.
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#if UNITY_OPENXR_1_9_0_OR_NEWER
using System;
#if UNITY_EDITOR
using UnityEditor;
using UnityEditor.XR.OpenXR.Features;
#endif // UNITY_EDITOR

using UnityEngine.XR.ARSubsystems;
using UnityEngine.XR.MagicLeap;
using System.Collections.Generic;

namespace UnityEngine.XR.OpenXR.Features.MagicLeapSupport
{
    [System.Obsolete("Type has been relocated to new namespace. Update reference to MagicLeap.OpenXR.Features.SpatialAnchors")]
    public partial class MagicLeapSpatialAnchorsFeature : MagicLeapOpenXRFeatureBase
    {
        public const string FeatureId = "com.magicleap.openxr.feature.ml2_spatialanchor";
        public const string ExtensionName = "XR_ML_spatial_anchors XR_EXT_future";

        private readonly List<XRAnchorSubsystemDescriptor> anchorSubsystemDescriptors = new();

        internal MagicLeapSpatialAnchorsNativeFunctions SpatialAnchorsNativeFunctions;
        internal MagicLeapSpaceInfoNativeFunctions SpaceInfoNativeFunctions;

        private struct AnchorsUpdateType
        { }

        protected override bool OnInstanceCreate(ulong xrInstance)
        {
            var exts = ExtensionName.Split(' ');
            foreach(var ext in exts)
            {
                if (!OpenXRRuntime.IsExtensionEnabled(ext))
                {
                    Debug.LogError($"{ext} is not enabled. Disabling {nameof(MagicLeapSpatialAnchorsFeature)}");
                    return false;
                }
            }
            var instanceCreateResult = base.OnInstanceCreate(xrInstance);

            if (instanceCreateResult)
            {
                MLXrAnchorSubsystem.RegisterDescriptor();
            }

            SpatialAnchorsNativeFunctions = CreateNativeFunctions<MagicLeapSpatialAnchorsNativeFunctions>();
            SpaceInfoNativeFunctions = CreateNativeFunctions<MagicLeapSpaceInfoNativeFunctions>();

            return instanceCreateResult;
        }

        protected override void OnSubsystemCreate()
        {
            base.OnSubsystemCreate();
            CreateSubsystem<XRAnchorSubsystemDescriptor, XRAnchorSubsystem>(anchorSubsystemDescriptors, MagicLeapXrProvider.AnchorSubsystemId);
        }

        protected override void OnSubsystemStart()
        {
            base.OnSubsystemStart();
            StartSubsystem<XRAnchorSubsystem>();
        }

        protected override void OnSubsystemStop()
        {
            base.OnSubsystemStop();
            StopSubsystem<XRAnchorSubsystem>();
        }

        protected override void OnSubsystemDestroy()
        {
            base.OnSubsystemDestroy();
            DestroySubsystem<XRAnchorSubsystem>();
        }
    }
}
#endif // UNITY_OPENXR_1_9_0_OR_NEWER