using System.Collections.Generic;
using Cysharp.Threading.Tasks;
using FairyGUI;
using YooAsset;

namespace Script.FrameWork.UI
{
    public class UIManager : Singleton<UIManager>
    {
        private Dictionary<string, UIPage> _uiPages = new();
        // 资源句柄列表
        private Dictionary<string, AssetHandle> _handles = new();
        // 常驻资源白名单
        private List<string> _permanentPackages = new();

        private object LoadFunc(string name, string extension, System.Type type, out DestroyMethod method)
        {
            method = DestroyMethod.None; //注意：这里一定要设置为None
            var package = YooAssets.GetPackage("DefaultPackage");
            var handle = package.LoadAssetSync(name , type);
            if (!_handles.ContainsKey(name))
                _handles.Add(name, handle);
            return handle.AssetObject;
        }
        
        public override void Init()
        {
            // UIPackage.AddPackage("Common", LoadFunc);
            // UIPackage.AddPackage("Sound", LoadFunc);
            // UIPackage.AddPackage("PageLoading", LoadFunc);
            // UIConfig.buttonSound = (NAudioClip)UIPackage.GetItemAssetByURL("ui://Sound/Click");
            // GRoot.inst.EnableSound();
        }

        public override void UnInit()
        {
        }

        public bool IsActive<T>()
        {
            var pageName = typeof(T).Name;
            if (_uiPages.TryGetValue(pageName, out var page))
                return page.IsLoaded;
            return false;
        }

        public async UniTask ShowUI<T>(string resPath = "", UIParam param = null) where T : UIPage, new()
        {
            string pkgName;
            string resName;
            if (!string.IsNullOrEmpty(resPath))
            {
                if (!GetUIPkgAndResName(resPath, out pkgName, out resName))
                    return;
            }
            else
            {
                pkgName = typeof(T).Name;
                resName = typeof(T).Name;
            }
            
            UIPackage.AddPackage(pkgName, LoadFunc);
            
            if (!_uiPages.TryGetValue(resName, out var uiPage))
            {
                uiPage = new T();
                _uiPages.Add(resName, uiPage);
            }

            if (uiPage.IsLoaded)
            {
                uiPage.Show();
            }
            else
            {
                if (uiPage.IsLoading)
                {
                    // 正在加载中
                }
                else
                {
                    UIPackage.CreateObjectAsync(pkgName, resName, obj =>
                    {
                        float width = GRoot.inst.width;
                        float height = GRoot.inst.height;
                        
                        var panel = obj as GComponent;
                        var window = new Window
                        {
                            contentPane = panel
                        };
                        // window.x = width / 2 - window.width / 2;
                        // window.y = height / 2 - window.height / 2;
                        panel.SetSize(width, height);
                        uiPage.Create(window, panel);
                        uiPage.Init(param);
                        uiPage.InitEvents();
                        uiPage.Show();
                    });
                    uiPage.IsLoading = true;
                    await UniTask.WaitUntil(() => uiPage.IsLoaded);
                }
            }
        }

        public async UniTask CloseUI<T>()
        {
            var pageName = typeof(T).Name;
            // packageName和pageName一致
            var packageName = pageName;
            if (_uiPages.TryGetValue(pageName, out var page))
            {
                if (page.IsLoaded)
                {
                    await page.Close();
                }
                _uiPages.Remove(pageName);
                if (!_permanentPackages.Contains(packageName))
                {
                    if (_handles.TryGetValue(packageName, out var handle))
                    {
                        handle.Release();
                        _handles.Remove(packageName);
                    }
                }
                UIPackage.RemovePackage(packageName);
            }
        }

        public void Update(float deltaTime)
        {
            foreach (var (uiName, page) in _uiPages)
            {
                if (page.IsLoading || !page.IsLoaded) continue;
                page.Update(deltaTime);
            }
        }

        private bool GetUIPkgAndResName(string resPath, out string pkgName, out string resName)
        {
            pkgName = "";
            resName = "";
            var arr = resPath.Split('/');
            if (arr.Length < 2)
            {
                LogHelper.LogError($"UI ResPath Error: {resPath}");
                return false;
            }
            pkgName = arr[0];
            resName = arr[1];
            return true;
        }
    }
}