using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Xml;
using System.Diagnostics;
using System.Windows.Controls.Primitives;

namespace Aitex.UI.RecipeEditor
{
    /// <summary>
    /// Interaction logic for RecipeEditorControl.xaml
    /// </summary>
    public partial class RecipeEditorControl : UserControl
    {
        public RecipeEditorControl()
        {
            InitializeComponent();
            ControlViewModel = new RecipeEditorControlViewModel() { GridStackPanel = stackPanel1,HeadWrapPanel =headStackpanel};
            Loaded += new RoutedEventHandler(RecipeEditorView_Loaded);
        }

        /// <summary>
        /// RecipeEditor's view model
        /// </summary>
        public RecipeEditorControlViewModel ControlViewModel { get; set; }

       
        private void RecipeEditorView_Loaded(object sender, RoutedEventArgs e)
        {
            grid1.DataContext = ControlViewModel;
        }      

        /// <summary>
        /// update recipe variations
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void NewButtonPanelLoaded(object sender, RoutedEventArgs e)
        {
            try
            {
                string variation = (string)((Button)sender).Tag;
                //newButton.IsOpen = false;
                XmlDocument doc = new XmlDocument();
                var dir = new System.IO.FileInfo(Process.GetCurrentProcess().MainModule.FileName).Directory;
                string xmlPath = dir + "\\Config\\" + variation + ".xml";
                doc.Load(xmlPath);
                //ControlViewModel.LoadRecipe(doc.SelectSingleNode("/Aitex/TableRecipeFormat").OuterXml, doc.SelectSingleNode("/Aitex/TableRecipeData").OuterXml);
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
            }
        }     
    }
    public class GridOptions
    {
        //暂时不处理实时显示的事情
        #region 显示边框信息
        public static readonly DependencyProperty ShowBorderProperty =
            DependencyProperty.RegisterAttached("ShowBorder", typeof(bool), typeof(GridOptions)
                , new PropertyMetadata(OnShowBorderChanged));
        public static bool GetShowBorder(DependencyObject obj)
        {
            return (bool)obj.GetValue(ShowBorderProperty);
        }

        //private static bool flag = false;

        public static void SetShowBorder(DependencyObject obj, bool value)
        {
            GridLoaded(obj as Grid, null);
            obj.SetValue(ShowBorderProperty, value);
        }

        public static void OnShowBorderChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var grid = d as Grid;
            if ((bool)e.OldValue)
                grid.Loaded -= (s, arg) => { };
            else
            {
                grid.Loaded += new RoutedEventHandler(GridLoaded);
            }
        }
        #endregion
        #region 线宽信息
        public static readonly DependencyProperty LineThicknessProperty =
           DependencyProperty.RegisterAttached("LineThickness", typeof(double), typeof(GridOptions),
               new PropertyMetadata(1d, OnGridLineThicknessChanged));
        public static double GetLineThickness(DependencyObject obj)
        {
            return (double)obj.GetValue(LineThicknessProperty);
        }

        public static void SetLineThickness(DependencyObject obj, double value)
        {
            obj.SetValue(LineThicknessProperty, value);
        }


        public static void OnGridLineThicknessChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {

        }
        #endregion

        public static readonly DependencyProperty LineBrushProperty =
            DependencyProperty.RegisterAttached("LineBrush", typeof(Brush), typeof(GridOptions),
                new PropertyMetadata(Brushes.Gray, OnGridLineBrushChanged));

        #region 线画刷问题
        public static Brush GetLineBrush(DependencyObject obj)
        {
            var brush = (Brush)obj.GetValue(LineBrushProperty);
            return brush ?? Brushes.LightGray;
        }

        public static void SetLineBrush(DependencyObject obj, Brush value)
        {
            obj.SetValue(LineBrushProperty, value);
        }

        public static void OnGridLineBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {

        }
        #endregion

        private static void GridLoaded(object sender, RoutedEventArgs e)
        {

            #region 思路
            /*
             * 1、覆盖所有单元格都要包围上边框。
             * 2、边框线不能存在重复。每个单元格绘制【右下】部分，主体绘制右上部分
             */
            #endregion
            var grid = sender as Grid;
            foreach (UIElement item in grid.Children)
            {
                if (item is Border)
                {
                    return;
                }
            }
            var rowCount = Math.Max(1, grid.RowDefinitions.Count);
            var columnCount = Math.Max(1, grid.ColumnDefinitions.Count);
            #region 初始化标准数组
            int[,] flagArray = new int[rowCount, columnCount];
            #endregion
            var controls = grid.Children;
            var count = controls.Count;
            var settingThickness = GetLineThickness(grid);
            var borderBrush = GetLineBrush(grid);
            for (int i = 0; i < count; i++)
            {
                var item = controls[i] as FrameworkElement;
                var row = Grid.GetRow((item));
                var column = Grid.GetColumn(item);
                var rowSpan = Grid.GetRowSpan(item);
                var columnSpan = Grid.GetColumnSpan(item);
                for (int rowTemp = 0; rowTemp < rowSpan; rowTemp++)
                {
                    for (int colTemp = 0; colTemp < columnSpan; colTemp++)
                    {
                        flagArray[rowTemp + row, colTemp + column] = 1;
                    }
                }

                var border = CreateBorder(row, column, rowSpan, columnSpan, settingThickness);
                border.BorderBrush = borderBrush;

                grid.Children.RemoveAt(i);
                border.Child = item;
                grid.Children.Insert(i, border);
            }

            #region 整理为填充单元格
            for (int i = 0; i < rowCount; i++)
            {
                for (int k = 0; k < columnCount; k++)
                {
                    if (flagArray[i, k] == 0)
                    {
                        var border = CreateBorder(i, k, 1, 1, settingThickness);
                        border.BorderBrush = borderBrush;
                        grid.Children.Add(border);
                    }
                }
            }
            #endregion


        }

        private static Border CreateBorder(int row, int column, int rowSpan, int columnSpan, double thickness)
        {
            var useThickness = new Thickness(0, 0, thickness, thickness);
            if (row == 0)
                useThickness.Top = thickness;
            if (column == 0)
                useThickness.Left = thickness;
            var border = new Border()
            {
                BorderThickness = useThickness,
            };
            Grid.SetRow(border, row);
            Grid.SetColumn(border, column);
            Grid.SetRowSpan(border, rowSpan);
            Grid.SetColumnSpan(border, columnSpan);
            return border;
        }
    }
    public class ItemsControlHelper
    {
        /// <summary>
        /// 绑定 enum 类型所有值给 ItemsSource 赋值
        /// 必须绑定 SelectedItem
        /// </summary>
        public static readonly DependencyProperty EnumValuesToItemsSourceProperty = DependencyProperty.RegisterAttached(
            "EnumValuesToItemsSource", typeof(bool), typeof(ItemsControlHelper), new PropertyMetadata(default(bool), OnEnumValuesToItemsSourceChanged));

        public static void SetEnumValuesToItemsSource(DependencyObject element, bool value)
        {
            element.SetValue(EnumValuesToItemsSourceProperty, value);
        }

        public static bool GetEnumValuesToItemsSource(DependencyObject element)
        {
            return (bool)element.GetValue(EnumValuesToItemsSourceProperty);
        }

        private static void OnEnumValuesToItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is ItemsControl itemsControl && GetEnumValuesToItemsSource(itemsControl))
            {
                if (itemsControl.IsLoaded)
                {
                    SetItemsSource(itemsControl);
                }
                else
                {
                    itemsControl.Loaded += ItemsControl_Loaded;
                }
            }
        }

        private static void SetItemsSource(ItemsControl itemsControl)
        {
            var itemsBindingExpression = BindingOperations.GetBinding(itemsControl, ItemsControl.ItemsSourceProperty);
            if (itemsBindingExpression != null)
            {
                throw new InvalidOperationException("When using ItemsControlHelper.EnumValuesToItemsSource, cannot be used ItemsSource at the same time.");
            }

            if (itemsControl.Items.Count > 0)
            {
                throw new InvalidOperationException("When using ItemsControlHelper.EnumValuesToItemsSource, Items Collection must be null");
            }

            var bindingExpression = BindingOperations.GetBindingExpression(itemsControl, Selector.SelectedItemProperty);
            if (bindingExpression == null)
            {
                throw new InvalidOperationException("ItemsControl must be binding SelectedItem property");
            }

            var binding = bindingExpression.ParentBinding;
            var dataType = bindingExpression.DataItem?.GetType();
            var paths = binding.Path.Path.Split('.');
            foreach (var path in paths)
            {
                var propertyInfo = dataType?.GetProperty(path);
                if (propertyInfo == null)
                {
                    return;
                }

                dataType = propertyInfo.PropertyType;
            }

            if (dataType!=null&&!dataType.IsEnum)
            {
                var underlyingType = Nullable.GetUnderlyingType(dataType);
                if (underlyingType == null)
                {
                    return;
                }

                dataType = underlyingType;
            }

            var itemsSourceBinding = new Binding();
            itemsSourceBinding.Source = Enum.GetValues(dataType);
            itemsSourceBinding.Mode = BindingMode.OneWay;
            itemsControl.SetBinding(ItemsControl.ItemsSourceProperty, itemsSourceBinding);
        }

        private static void ItemsControl_Loaded(object sender, RoutedEventArgs e)
        {
            var itemsControl = (ItemsControl)sender;
            itemsControl.Loaded -= ItemsControl_Loaded;
            SetItemsSource(itemsControl);
        }
    }
}