//==========================================================
//
// Copyright (c) Guangzhou Shixiang Technology Co.,Ltd.
// All rights reserved.
//
//==========================================================

using System.IO;
using UnityEditor;
using UnityEngine;
using UnityEditor.XR.Management.Metadata;

namespace GxrSdk.Editor
{
    /// <summary>
    /// (gxrsdk_android_plugin.aar)插件校验
    ///
    /// UnityPlayer的构造函数在Unity2022和之前的版本中是不兼容的，这样就导致了需要2份不同的
    /// gxrsdk_android_plugin.aar(2022和2021(2022之前的是一样的))，aar存放在GxrSdk/Plugins/Android/gxrsdk_android_plugin中，
    /// 每次打开工程时需要判断当前编辑器版本把对应的aar文件复制出来
    /// </summary>
    [InitializeOnLoad]
    public class GxrAndroidPluginVerify
    {
        /// <summary>
        /// 本地存放不同版本插件的路径
        /// </summary>
        private static readonly string GxrSdkAndroidPluginFolder = "Assets/GxrSdk/Sdk/Plugins/Android/gxrsdk_android_plugin/";
        /// <summary>
        /// 2022版本插件路径
        /// </summary>
        private static readonly string AndroidPluginPath2022 = GxrSdkAndroidPluginFolder + "gxrsdk_android_plugin-release.aar.2022";
        private static readonly string AndroidPluginPath2022XrSdk = GxrSdkAndroidPluginFolder + "gxrsdk_android_plugin-release.aar.2022.xrsdk";
        /// <summary>
        /// 2021版本插件路径
        /// </summary>
        private static readonly string AndroidPluginPath2021 = GxrSdkAndroidPluginFolder + "gxrsdk_android_plugin-release.aar.2021";
        private static readonly string AndroidPluginPath2021XrSdk = GxrSdkAndroidPluginFolder + "gxrsdk_android_plugin-release.aar.2021.xrsdk";
        /// <summary>
        /// 插件目标路径
        /// </summary>
        private static readonly string AndroidPluginDestPath = "Assets/GxrSdk/Sdk/Plugins/Android/gxrsdk_android_plugin-release.aar";

        static GxrAndroidPluginVerify()
        {
            EditorApplication.update += Update;
        }

        private static void Update()
        {
            EditorApplication.update -= Update;

            bool xrProviderToggled = IsGxrSdkXrProviderToggled();
            string srcPath = null;

#if UNITY_2022_1_OR_NEWER
            srcPath = xrProviderToggled ? AndroidPluginPath2022XrSdk : AndroidPluginPath2022;
#else
            srcPath = xrProviderToggled ? AndroidPluginPath2021XrSdk : AndroidPluginPath2021;
#endif
            if (string.IsNullOrEmpty(srcPath))
            {
                Debug.LogError($"[GxrAndroidPluginVerify] The source path is null or empty.");
                return;
            }
            if (!File.Exists(srcPath))
            {
                Debug.Log($"[GxrAndroidPluginVerify] Cannot find {srcPath}.");
                return;
            }

            if (File.Exists(AndroidPluginDestPath))
            {
                File.Delete(AndroidPluginDestPath);
            }
            File.Copy(srcPath, AndroidPluginDestPath);
        }

        /// <summary>
        /// XR Plugin Management中是否勾选了GxrSdk xr plugin
        /// 勾选了就是要使用XrSdk模式，就得使用对应版本的gxrsdk_android_plugin.aar
        /// [已知问题]如果在修改了是否勾选后，没有其它修改也就没有重新触发这里进行重新检测，那么使用的aar就可能不是预期的版本。
        /// </summary>
        /// <returns></returns>
        private static bool IsGxrSdkXrProviderToggled()
        {
            // 正常的话应该使用typeof(GxrLoader).FullName去获取这个名字，
            // 暂时为了不引用插件模块，直接写名字在这里，注意名字要保持一致
            string loaderFullName = "Unity.XR.GXRSDK.GxrLoader";
            var toggled = XRPackageMetadataStore.IsLoaderAssigned(loaderFullName, BuildTargetGroup.Android);
            return toggled;
        }
    }
}