using MeterVision.Config;
using MeterVision.db;
using MeterVision.Dlg;
using MeterVision.Helper;
using MeterVision.model;
using MeterVision.Patch;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;

namespace MeterVision.Stand
{
    /// <summary>
    /// UCStandGrid.xaml 的交互逻辑
    /// </summary>
    public partial class UCStandGrid : UserControl, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        //public event EventHandler<StandItemCountChangedEventArgs> OnStandItemCountChanged;
        //StandItem standItem
        //public event Action<StandItem> OnStandItemCountChanged;

        private SemaphoreSlim _semaphore = new SemaphoreSlim(1, 1);
        private SemaphoreSlim _loadLock = new SemaphoreSlim(1, 1);


        //定义数据源
        public BulkObservableCollection<StandDetailItem> StandDetailList { get; set; }
       
        //定义事件，用于通知外部组件选中项已更改
        public event EventHandler<StandDetailItemChangedEventArgs> OnSelectedStandDetailItemChanged;

        public event Action<string> OnDeleteStandDetailItem;

        public event Action<string, string> OnStandDetailMark;

        private StandDetailItem _selectedStandDetailsItem;
        //定义SelectedDataItem属性，并在值变化时触发事件
        public StandDetailItem SelectedStandDetailItem
        {
            get => _selectedStandDetailsItem;
            set
            {
                if(_selectedStandDetailsItem != value)
                {
                    _selectedStandDetailsItem = value;
                    OnPropertyChanged(nameof(SelectedStandDetailItem));
                    OnSelectedStandDetailItemChanged?.Invoke(this, new StandDetailItemChangedEventArgs(value));
                }
            }
        }

        //private StandItem _curStandItem;
        //public StandItem CurStandItem
        //{
        //    get => _curStandItem;
        //    set
        //    {
        //        if (_curStandItem != value)
        //        {
        //            _curStandItem = value;
        //            //StandDetailPage.InitDefaulValue(mConfigItem.StandPageSize);
        //            //LoadStandDetailItemList(value);
        //        }
        //    }
        //}

        private StationItem _curStationItem;
        public StationItem CurStationItem
        {
            get => _curStationItem; 
            set
            {
                /*if(_curStationId != value)
                {
                    _curStationId = value;
                }*/
                if(_curStationItem != value)
                {
                    //if (!_semaphore.Wait(0)) return; // 防止重复调用
                    //try
                    //{
                        _curStationItem = value;
                        StandDetailPage.InitDefaulValue(mConfigItem.StandPageSize);
                        LoadStandDetailItemList();
                    //}
                    //catch { }
                    //finally
                    //{
                    //    _semaphore.Release();
                    //}
                }
            }
        }


        //public void ChangeStation(StandItem standItem,string stationId)
        //{
        //    bool blChangeStationId = false;
        //    bool blChangeStandItem = false;

        //    if(_curStationId != stationId)
        //    {
        //        _curStationId = stationId;
        //        blChangeStationId = true;
        //    }

        //    if(_curStandItem != standItem)
        //    {
        //        _curStandItem = standItem;
        //        blChangeStandItem = true;
        //    }
            
        //    if(blChangeStationId || blChangeStandItem)
        //    {
        //        StandDetailPage.InitDefaulValue(mConfigItem.StandPageSize);
        //        LoadStandDetailItemList(CurStandItem);
        //    }
        //}

        //详情分页信息
        public PageModel StandDetailPage { get; set; }

        private int _totalRecord;
        public int TotalRecords
        {
            get => _totalRecord;
            set
            {
                if(_totalRecord != value)
                {
                    _totalRecord = value;
                    OnPropertyChanged(nameof(TotalRecords));
                }
            }
        }

        public CfginiItem mConfigItem { get; set; }           

        //异步方法
        private async void LoadStandDetailItemList()
        {
            if (!await _loadLock.WaitAsync(0)) return; // 如果已有任务在执行，则直接返回

            try
            {
                StandDetailList.Clear();
                if (CurStationItem != null)
                {
                    try
                    {
                        var result = await Task.Run(() =>
                        {
                            return DBStand.GetPagedStandDetails(
                             StandDetailPage.PageNumber, StandDetailPage.PageSize, CurStationItem);
                        });

                        TotalRecords = result.Item1;
                        StandDetailPage.PageCount = result.Item2;
                        List<TStandDetail> standDetails = result.Item3;

                        //int index = 0;
                        //foreach (TStandDetail standDetail in standDetails)
                        //{
                        //    StandDetailList.Add(new StandDetailItem(standDetail));
                        //    index++;
                        //    //更新索引号
                        //    StandDetailList[StandDetailList.Count - 1].Index =
                        //        index + ((StandDetailPage.PageNumber - 1) * StandDetailPage.PageSize);
                        //}
                        var standDetailList = standDetails.Select((standDetail, i) => new StandDetailItem(standDetail)
                        {
                            Index = (StandDetailPage.PageNumber - 1) * StandDetailPage.PageSize + i + 1
                        }).ToList();
                        StandDetailList.AddRange(standDetailList);

                        if (StandDetailList.Count > 0)
                        {
                            //await Task.Delay(100);
                            //await Dispatcher.InvokeAsync(() =>
                            //{
                            //dgStandDetails.ScrollIntoView(dgStandDetails.Items[0]);
                            //});              
                            var scrollViewer = GetScrollViewer(dgStandDetails);
                            scrollViewer?.ScrollToTop();
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(Application.Current.MainWindow,
                            $"加载数据时发生错误：{ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                    }
                }

                if (StandDetailList.Count > 0)
                {
                    SelectedStandDetailItem = StandDetailList[0];
                }
                else
                {
                    SelectedStandDetailItem = null;
                }
            }
            catch { }
            finally
            {
                _loadLock.Release();
            }
        }

        public UCStandGrid()
        {
            InitializeComponent();
            StandDetailList = new BulkObservableCollection<StandDetailItem>();
            dgStandDetails.ItemsSource = StandDetailList;

            //CurStandItem = null;
            CurStationItem = null;

            mConfigItem = CfginiItem.GetConfigItem();

            StandDetailPage = new PageModel()
            {
                PageSize = mConfigItem.PageSize3, //mConfigItem.StandPageSize,
                PageNumber = 1,
            };

            //mConfigItem.OnStandPageSizeChanged += MConfigItem_OnStandPageSizeChanged1;
            mConfigItem.OnPageSize3Changed += MConfigItem_OnPageSize3Changed;

            UCPatchGrid.OnDeleteStandDetail += UCPatchGrid_OnDeleteStandDetail;
            UCPatchGrid.OnUpdateStandValue += UCPatchGrid_OnUpdateStandValue;

            this.DataContext = this;
        }

        private void MConfigItem_OnPageSize3Changed(int pageSize3)
        {
            //throw new NotImplementedException();
            if (!_semaphore.Wait(0)) return; // 防止重复调用
            try
            {
                StandDetailPage.InitDefaulValue(pageSize3);
                LoadStandDetailItemList();
            }
            catch { }
            finally
            {
                _semaphore.Release();
            }
        }

        //private void MConfigItem_OnStandPageSizeChanged1(int pageSize)
        //{
        //    StandDetailPage.InitDefaulValue(pageSize);
        //    LoadStandDetailItemList();
        //}

        private void UCPatchGrid_OnUpdateStandValue(string arg1, string arg2)
        {
            //throw new NotImplementedException();
            StandDetailItem standDetailItem = StandDetailList.FirstOrDefault(a => a.StandDetailId == arg1);
            if(standDetailItem != null)
            {
                standDetailItem.StandValue = arg2;
            }
        }

        private void UCPatchGrid_OnDeleteStandDetail(string standDetailId)
        {
            //Application.Current.Dispatcher.Invoke(() =>
            //{
            //    // 从数据源中移除该条目                       
            //    StandDetailList.Remove(selectedItem);
            //    SelectedStandDetailItem = null;
            //    OnDeleteStandDetailItem?.Invoke(selectedItem.StandId);
            //});
            StandDetailItem standDetailItem = StandDetailList.FirstOrDefault(a => a.StandDetailId == standDetailId);
            if (standDetailItem != null)
            {
                StandDetailList.Remove(standDetailItem);
                OnDeleteStandDetailItem?.Invoke(standDetailItem.StandId);
            }
        }

        private void Image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            var image = sender as System.Windows.Controls.Image;
            if (image == null) return;

            var dataContext = image.DataContext as StandDetailItem;
            if (dataContext == null) return;

            //var dialog = new ImageViewerWindow(dataContext.SourceImagePath)
            var dialog = new imgWindow(dataContext.SrcImage)
            {
                Owner = Application.Current.MainWindow
            };
            dialog.Show();
        }

        private void StandValue_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {        
            if (e.ClickCount == 2)
            {               
                // 获取当前行的数据上下文
                var textBlock = sender as TextBlock;
                if (textBlock == null) return;

                var dataContext = textBlock.DataContext as StandDetailItem; // 替换为你的数据类型
                if (dataContext == null) return;

                SelectedStandDetailItem = dataContext;

                UpdateStandvalue(dataContext);

            }//e.clickCount
        }


        private void UpdateStandvalue(StandDetailItem detailItem)
        {
            StandValueModel standValueModel = new StandValueModel(detailItem);
            var dialog = new EditStandValueDlg(standValueModel)
            {
                Owner = Application.Current.MainWindow,
                WindowStartupLocation = WindowStartupLocation.CenterOwner
            };
            //if (dialog.ShowDialog() == true)
            //{
            //    UpdateStandValue(detailItem, standValueModel);
            //}//if showDialog
            dialog.OnEditStandValue += (value) =>
            {
                UpdateStandValue(detailItem, standValueModel);
            };
            dialog.Show();
        }

        private void UpdateStandValue(StandDetailItem detailItem,StandValueModel standValueModel)
        {
            try
            {
                //修改数据库
                bool updateStandValue2 = DBStand.UpdateStandDetailStandValue(detailItem.SrcImage, standValueModel.StandValue);
                if (updateStandValue2)
                {
                    detailItem.StandValue = standValueModel.StandValue;
                    //MessageBox.Show(Application.Current.MainWindow, "修改标准值完成。", "提示", MessageBoxButton.OK,
                    //    MessageBoxImage.Information);
                }
                else
                {
                    MessageBox.Show(Application.Current.MainWindow, "修改标准值失败。", "警告", MessageBoxButton.OK,
                        MessageBoxImage.Warning);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(Application.Current.MainWindow, $"修改标准值错误：{ex.Message}！", "警告", MessageBoxButton.OK,
                    MessageBoxImage.Warning);
            }
        }

        private void UserControl_DragEnter(object sender, DragEventArgs e)
        {
            //e.Handled = true;

            //// Check if the dragged item is a folder
            //if (e.Data.GetDataPresent(DataFormats.FileDrop) && CurStandItem != null)
            //{
            //    var paths = (string[])e.Data.GetData(DataFormats.FileDrop);
            //    if (paths != null && paths.Length > 0 && Directory.Exists(paths[0]))
            //    {
            //        e.Effects = DragDropEffects.Copy;
            //    }
            //    else
            //    {
            //        e.Effects = DragDropEffects.None;
            //    }
            //}
            //else
            //{
            //    e.Effects = DragDropEffects.None;
            //}
        }

        //private async void UserControl_Drop(object sender, DragEventArgs e)
        //{
            //if (e.Data.GetDataPresent(DataFormats.FileDrop) && CurStandItem != null)
            //{
            //    var paths = (string[])e.Data.GetData(DataFormats.FileDrop);
            //    if (paths != null && paths.Length > 0)
            //    {
            //        var folderPath = paths[0];

            //        if (Directory.Exists(folderPath))
            //        {
            //            await ImportStandImageFloder(folderPath);
            //        }
            //    }
            //}//if
        //}

        //public async Task<bool> ImportStandImageFloder(string folderPath)
        //{
        //    try
        //    {
        //        bool blLoad = await LoadJpgFilesFromFolder(folderPath);
        //        if (blLoad)
        //        {
        //            StandDetailPage.InitDefaulValue();
        //            LoadStandDetailItemList(CurStandItem);
        //        }
        //        return true;
        //    }
        //    catch(Exception ex)
        //    {
        //        MessageBox.Show(Application.Current.MainWindow,
        //            $"导入模板图像错误：{ex.Message}", "错误",
        //            MessageBoxButton.OK, MessageBoxImage.Error);
        //        return false;
        //    }
        //}

        //private async Task<bool> LoadJpgFilesFromFolder(string folderPath)
        //{
        //    //var jpgFiles = Directory.GetFiles(folderPath, "*.jpg", SearchOption.AllDirectories);
        //    var jpgFiles = Directory.GetFiles(folderPath, "*.jpg", SearchOption.AllDirectories)
        //                .Concat(Directory.GetFiles(folderPath, "*.bmp", SearchOption.AllDirectories))
        //                .ToArray();

        //    List<string> fileList = new List<string>();
        //    foreach (var filePath in jpgFiles)
        //    {
        //        /*_fileItems.Add(new FileItem
        //        {
        //            FileName = Path.GetFileName(filePath),
        //            FilePath = filePath,
        //            FileSize = new FileInfo(filePath).Length
        //        });*/
        //        if( (ThisApp.IsJpgFile(filePath) || ThisApp.IsBmpFile(filePath) ) && 
        //            ThisApp.IsFileSizeValid(filePath) &&
        //            ThisApp.IsImageDimensionsValid(filePath))
        //        {
        //            fileList.Add(filePath);
        //        }
        //    }//foreach

        //    if(fileList.Count == 0)
        //    {
        //        MessageBox.Show(Application.Current.MainWindow,
        //            "没有找到符号要求的图片文件。", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
        //        return false;
        //    }

        //    //加载数据到数据库中
        //    return await InsertFilesWithProgress(fileList);
        //}

        //public async Task<bool> InsertFilesWithProgress(List<string> filePaths)
        //{
        //    // 弹出一个非模式对话框来显示进度
        //    ProgressDialog progressDialog = new ProgressDialog()
        //    {
        //        Owner = Application.Current.MainWindow,
        //        WindowStartupLocation = WindowStartupLocation.CenterOwner
        //    };
        //    progressDialog.Show();

        //    try
        //    {
        //        // 任务来异步执行文件插入
        //        bool blInsert = await InsertFilesToDatabase(filePaths, progressDialog);
        //        //Task.Run(() => InsertFilesToDatabase(filePaths, progressDialog));

        //        //刷新CurItem
        //        if (blInsert)
        //        {
        //            OnStandItemCountChanged?.Invoke(this, new StandItemCountChangedEventArgs(CurStandItem));
        //        }
        //        return blInsert;
        //    }
        //    catch (Exception ex)
        //    {
        //        MessageBox.Show(Application.Current.MainWindow, $"操作数据库失败：{ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
        //        return false;
        //    }
        //    finally
        //    {
        //        // 关闭进度对话框
        //        progressDialog.Close();
        //    }
        //}

        //public async Task<bool> InsertFilesToDatabase(List<string> filePaths, ProgressDialog progressDialog)
        //{
        //    int totalFiles = filePaths.Count;
        //    int currentFile = 0;

        //    int insertCount = 0;
        //    try
        //    {
        //        await Task.Run(() =>
        //        {
        //            foreach (var filePath in filePaths)
        //            {
        //                // 检查文件是否已经存在于数据库            
        //                if (!DBStand.IsSrcImageExitInStand(filePath, CurStandItem.StandId))
        //                {
        //                    // 插入文件路径到数据库
        //                    //InsertFileToDatabase(filePath);
        //                    TStandDetail standDetail = new TStandDetail()
        //                    {
        //                        StandDetailId = Guid.NewGuid().ToString(),
        //                        CreateTime = ThisApp.GetNowTime_yyyyMMddHHmmss(),
        //                        StandId = CurStandItem.StandId,
        //                        SrcImage = filePath,
        //                        StandValue = ""
        //                    };
        //                    bool blInsert = DBStand.InsertStandDetail(standDetail);
        //                    if(blInsert)
        //                    {
        //                        insertCount++;
        //                    }
        //                }

        //                // 更新进度条
        //                currentFile++;
        //                Application.Current.Dispatcher.Invoke(() =>
        //                {
        //                    UpdateProgress(progressDialog, currentFile, totalFiles);
        //                });                        
        //            }
        //        });
        //    }
        //    catch(Exception ex)
        //    {
        //        MessageBox.Show(Application.Current.MainWindow, $"插入数据失败：{ex.Message}。", "错误",
        //            MessageBoxButton.OK, MessageBoxImage.Error);
        //    }
        //    return insertCount > 0;
        //}

        public void UpdateProgress(ProgressDialog progressDialog, int currentFile, int totalFiles)
        {
            // 更新进度条的进度
            double progress = (double)currentFile / totalFiles * 100;
            progressDialog.UpdateProgress(progress);
        }
        
        public void NextPage()
        {
            if (!_semaphore.Wait(0)) return; // 防止重复调用

            try
            {
                if (StandDetailPage.PageNumber < StandDetailPage.PageCount)
                {
                    StandDetailPage.PageNumber += 1;
                    LoadStandDetailItemList();
                }
            }
            catch { }
            finally
            {
                _semaphore.Release();
            }
        }

        public void PrePage()
        {
            if (!_semaphore.Wait(0)) return; // 防止重复调用
            try
            {
                if (StandDetailPage.PageNumber > 1)
                {
                    StandDetailPage.PageNumber -= 1;
                    LoadStandDetailItemList();
                }
            }
            catch { }
            finally
            {
                _semaphore.Release();
            }
        }

        public void FirstPage()
        {
            if (!_semaphore.Wait(0)) return; // 防止重复调用
            try
            {
                if (StandDetailPage.PageNumber > 1)
                {
                    StandDetailPage.PageNumber = 1;
                    LoadStandDetailItemList();
                }
            }
            catch { }
            finally
            {
                _semaphore.Release();
            }
        }

        public void LastPage()
        {
            if (!_semaphore.Wait(0)) return; // 防止重复调用
            try
            {
                if (StandDetailPage.PageNumber < StandDetailPage.PageCount)
                {
                    StandDetailPage.PageNumber = StandDetailPage.PageCount;
                    LoadStandDetailItemList();
                }
            }
            catch { }
            finally
            {
                _semaphore.Release();
            }
        }

        public void SpeciPage(int pageNumber)
        {
            if (!_semaphore.Wait(0)) return; // 防止重复调用
            try
            {
                if (pageNumber != StandDetailPage.PageNumber &&
                    pageNumber > 0 && pageNumber <= StandDetailPage.PageCount)
                {
                    StandDetailPage.PageNumber = pageNumber;
                    LoadStandDetailItemList();
                }
            }
            catch { }
            finally
            {
                _semaphore.Release();
            }
        }



        private void BtnDelDetailItem_Click(object sender, RoutedEventArgs e)
        {
            Button button = sender as Button;
            if (button == null) return;

            DataGridRow row = FindAncestor<DataGridRow>(button);
            if (row == null) return;

            //获取当前行绑定的数据项
            var selectedItem = row.Item as StandDetailItem;
            DeleteSelectedItem(selectedItem);
        }

        private async void DeleteSelectedItem(StandDetailItem selectedItem)
        {
            if (selectedItem == null) return;

            MessageBoxResult result = MessageBox.Show("确定要删除此条目吗？", "确认删除", MessageBoxButton.YesNo, MessageBoxImage.Question);
            if (result != MessageBoxResult.Yes) return;


            string titleInfo = "正在删除，请稍后...";
            WaitWindow waitWindow = new WaitWindow(titleInfo)
            {
                Owner = Application.Current.MainWindow,
                WindowStartupLocation = WindowStartupLocation.CenterOwner
            };
            waitWindow.Show();

            try
            {

                bool deleteSuccess = false;
                await Task.Run(() =>
                {
                    deleteSuccess = DBStand.DeleteTStandDetailById(selectedItem.StandDetailId);
                });

                if (deleteSuccess)
                {
                    //LoadStandDetailItemList(CurStandItem);
                    //await Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                    //{
                        // 从数据源中移除该条目                       
                        StandDetailList.Remove(selectedItem);
                        SelectedStandDetailItem = null;
                        OnDeleteStandDetailItem?.Invoke(selectedItem.StandId);
                        //重新加载数据
                        //LoadPatchDetailItemList();
                    //}));
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(Application.Current.MainWindow, $"删除失败：{ex.Message}", "错误",
                    MessageBoxButton.OK, MessageBoxImage.Error);
            }
            finally
            {
                waitWindow.Close();
            }
        }

        public static T FindAncestor<T>(DependencyObject dependencyObject) where T : DependencyObject
        {
            var parent = VisualTreeHelper.GetParent(dependencyObject);

            if (parent == null) return null;

            var parentT = parent as T;
            return parentT ?? FindAncestor<T>(parent);
        }

        private void BtnUpdateStandvalue_Click(object sender, RoutedEventArgs e)
        {
            Button button = sender as Button;
            if (button == null) return;

            DataGridRow row = FindAncestor<DataGridRow>(button);
            if (row == null) return;

            //获取当前行绑定的数据项
            var selectedItem = row.Item as StandDetailItem;

            UpdateStandvalue(selectedItem);
        }

        private void MiDelteRow_Click(object sender, RoutedEventArgs e)
        {
            if(SelectedStandDetailItem != null)
            {
                DeleteSelectedItem(SelectedStandDetailItem);
            }
        }

        private void MiUpdateStandvalue_Click(object sender, RoutedEventArgs e)
        {
            if (SelectedStandDetailItem == null) return;

            UpdateStandvalue(SelectedStandDetailItem);

        }

        private void BtnConfig_Click(object sender, RoutedEventArgs e)
        {
            Button button = sender as Button;
            if (button == null) return;

            DataGridRow row = FindAncestor<DataGridRow>(button);
            if (row == null) return;

            //获取当前行绑定的数据项
            var selectedItem = row.Item as StandDetailItem;

            EditStandDetailCfg dialog = new EditStandDetailCfg(selectedItem)
            {
                Owner = Application.Current.MainWindow,
                WindowStartupLocation = WindowStartupLocation.CenterOwner
            };
            if (dialog.ShowDialog() == true)
            {
                selectedItem = dialog.mStandDetail;
                OnStandDetailMark?.Invoke(selectedItem.StandId, selectedItem.StandId);
            }
        }

        private ScrollViewer _scrollViewer;

        private ScrollViewer GetScrollViewer(DependencyObject obj)
        {
            if (_scrollViewer != null)
            {
                return _scrollViewer;
            }

            if (obj is ScrollViewer)
            {
                _scrollViewer = (ScrollViewer)obj;
                return obj as ScrollViewer;
            }


            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                var child = VisualTreeHelper.GetChild(obj, i);
                var scrollViewer = GetScrollViewer(child);
                if (scrollViewer != null)
                {
                    _scrollViewer = scrollViewer;
                    return scrollViewer;
                }
            }

            return null;
        }

        ///////////////////////////////////////////////////////////////////////////
    }

    public class StandDetailItemChangedEventArgs : EventArgs
    {
        public StandDetailItem SelectedDataItem { get; }

        public StandDetailItemChangedEventArgs(StandDetailItem selectedDataItem)
        {
            SelectedDataItem = selectedDataItem;
        }
    }

    //目录的条目数发生了变化
    //public class StandItemCountChangedEventArgs : EventArgs
    //{
    //    public StandItem mStandItem { get; }
    //    public StandItemCountChangedEventArgs(StandItem standItem)
    //    {
    //        mStandItem = standItem;
    //    }
    //}

    ///////////////////////////////////////////////////////////////////
}