using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using BITKit.UX;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.SceneManagement;
using UnityEngine.UIElements;
using YooAsset;
using Debug = UnityEngine.Debug;

namespace BITKit
{
    public class BITFramework : MonoBehaviour
    {
        private static System.Diagnostics.Stopwatch Stopwatch;

        [RuntimeInitializeOnLoadMethod]
        private static void Reload()
        {
            Stopwatch = new Stopwatch();
#if UNITY_EDITOR
#else
                SplashScreen.Stop(SplashScreen.StopBehavior.StopImmediate);
#endif
        }
        // [SerializeField] private AssetReference serviceReference;
        // private async void Start()
        // {
        //     if(InitializationState is not InitializationState.None)return;
        //     InitializationState = InitializationState.Initializing;
        //     var asyncOperationHandle = serviceReference.LoadAssetAsync<GameObject>();
        //     await UniTask.WaitUntil(() => asyncOperationHandle.IsDone);
        //     DontDestroyOnLoad(Instantiate(asyncOperationHandle.Result));
        //     Stopwatch.Stop();
        //     BIT4Log.Log<BITFramework>($"BITFramework加载完成,耗时:{Stopwatch.ElapsedMilliseconds}ms");
        // }

        [SerializeField] private string addressableName;
        [SerializeField] private UXBar progressBar;
        [SerializeField] private UIDocument document;
        [SerializeField] private UXLabel progressLabel;

        [SerializeField] private bool IsEditorSimulateMode;

        private float CurrentOpacity
        {
            get => document.rootVisualElement.GetOpacity();
            set => document.rootVisualElement.SetOpacity(value);
        }

        private async void Start()
        {
            #if UNITY_EDITOR
            #else
            IsEditorSimulateMode=false;
            #endif
            
            progressBar.Set(0f);
            
            var stopwatch = new Stopwatch();
            stopwatch.Start();
            DontDestroyOnLoad(gameObject);
            // 初始化资源系统
            YooAssets.Initialize();

            const string PackageName = "DefaultPackages";
            // 创建默认的资源包
            var package = YooAssets.TryGetPackage(PackageName) ?? YooAssets.CreatePackage(PackageName);

            // 设置该资源包为默认的资源包，可以使用YooAssets相关加载接口加载该资源包内容。
            YooAssets.SetDefaultPackage(package);

            const string defaultHostServer = "http://127.0.0.1/CDN/PC/v1.0";
            const string fallbackHostServer = "http://127.0.0.1/CDN/PC/v1.0";
            
            InitializeParameters initParameters = new HostPlayModeParameters
            {
                BuildinQueryServices = new GameQueryServices(),
                RemoteServices = new RemoteServices(defaultHostServer, fallbackHostServer)
            };
            if (IsEditorSimulateMode)
            {
                var editorParameters = new EditorSimulateModeParameters
                {
                    SimulateManifestFilePath = EditorSimulateModeHelper.SimulateBuild("BuiltinBuildPipeline",PackageName)
                };
                initParameters = editorParameters;
            }
            
            var initOperation = package.InitializeAsync(initParameters);
            progressLabel.Set("正在初始化资源系统...");
            while (initOperation.IsDone is false)
            {
                await UniTask.NextFrame(destroyCancellationToken);
                progressBar.Set(initOperation.Progress);
            }

            progressLabel.Set("正在更新资源包版本...");
            var operation = package.UpdatePackageVersionAsync();
            while (operation.IsDone is false)
            {
                await UniTask.NextFrame(destroyCancellationToken);
                progressBar.Set(operation.Progress);
            }

            if (operation.Status == EOperationStatus.Succeed)
            {
                //更新成功
                string packageVersion = operation.PackageVersion;
                Debug.Log($"Updated package Version : {packageVersion}");
            }
            else
            {
                //更新失败
                Debug.LogError(operation.Error);
            }

            progressLabel.Set("正在初始化Framework");
            var frameworkHandle = YooAssets.LoadAssetAsync<GameObject>(addressableName);
            while (frameworkHandle.IsDone is false)
            {
                await UniTask.NextFrame(destroyCancellationToken);
                progressBar.Set(frameworkHandle.Progress);
            }

            var framework = Instantiate(frameworkHandle.AssetObject);
            DontDestroyOnLoad(framework);
            progressLabel.Set("已加载完成");
              
            stopwatch.Stop();
            
            Destroy(document);
            
            BIT4Log.Log<BITFramework>("BITFramework加载完成,耗时:" + stopwatch.ElapsedMilliseconds + "ms");
            
            SceneManager.LoadScene(1);
        }

        private void OnDestroy()
        {
            YooAssets.Destroy();
        }
    }

    public class GameQueryServices : IBuildinQueryServices
    {
        public bool Query(string packageName, string fileName)
        {
            // 注意：fileName包含文件格式
            return StreamingAssetsHelper.FileExists(packageName, fileName);
        }
    }

    /// <summary>
    /// 远端资源地址查询服务类
    /// </summary>
    public class RemoteServices : IRemoteServices
    {
        private readonly string _defaultHostServer;
        private readonly string _fallbackHostServer;

        public RemoteServices(string defaultHostServer, string fallbackHostServer)
        {
            _defaultHostServer = defaultHostServer;
            _fallbackHostServer = fallbackHostServer;
        }
        string IRemoteServices.GetRemoteMainURL(string fileName)
        {
            return $"{_defaultHostServer}/{fileName}";
        }
        string IRemoteServices.GetRemoteFallbackURL(string fileName)
        {
            return $"{_fallbackHostServer}/{fileName}";
        }
    }
}