using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;

namespace HMI.UI.DpUtil
{
    public class UniformGridHelper
    {
        public static double GetInnerBorder(DependencyObject obj)
        {
            return (double)obj.GetValue(InnerBorderProperty);
        }

        public static void SetInnerBorder(DependencyObject obj, object value)
        {
            double dv = double.Parse(value.ToString());
            obj.SetValue(InnerBorderProperty, dv);
        }

        public static readonly DependencyProperty InnerBorderProperty =
            DependencyProperty.RegisterAttached("InnerBorder", typeof(object), typeof(UniformGrid),
                new PropertyMetadata(0, OnInnerBorderChanged));

        public static Brush GetInnerBorderBrush(DependencyObject obj)
        {
            return (Brush)obj.GetValue(InnerBorderBrushProperty);
        }
        public static void SetInnerBorderBrush(DependencyObject obj, Brush value)
        {
            obj.SetValue(InnerBorderBrushProperty, value);
        }
        public static readonly DependencyProperty InnerBorderBrushProperty =
            DependencyProperty.RegisterAttached("InnerBorderBrush", typeof(Brush), typeof(UniformGrid),
                new PropertyMetadata(null, OnInnerBorderChanged));

        public static string GetInnerBorderIgnore(DependencyObject obj)
        {
            return (string)obj.GetValue(InnerBorderIgnoreProperty);
        }
        public static void SetInnerBorderIgnore(DependencyObject obj, string value)
        {
            obj.SetValue(InnerBorderIgnoreProperty, value);
        }

        public static readonly DependencyProperty InnerBorderIgnoreProperty =
            DependencyProperty.RegisterAttached("InnerBorderIgnore", typeof(string),
                typeof(UniformGrid), new PropertyMetadata("None", OnInnerBorderChanged));

        private static void OnInnerBorderChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is UniformGrid grid)
            {
                if (e.Property == InnerBorderProperty || e.Property == InnerBorderIgnoreProperty)
                {
                    grid.Loaded += GridInnerBorder_Loaded;
                    return;
                }
            }
        }

        private static void GridInnerBorder_Loaded(object sender, RoutedEventArgs e)
        {
            UniformGrid grid = sender as UniformGrid;
            RefreshGridInnerBorder(grid);
            grid.Loaded -= GridInnerBorder_Loaded;
        }

        public static void RefreshGridInnerBorder(UniformGrid grid)
        {
            double width = GetInnerBorder(grid);
            if (width <= 0) return;
            var rowCount = grid.Rows;
            var columnCount = grid.Columns;
            int totalCount = rowCount * columnCount;

            string baseData = GetInnerBorderIgnore(grid);
            HashSet<string> data = new HashSet<string>(baseData.Split(','));
            bool ignoreTop = data.Contains("All") || data.Contains("Top"),
                ignoreBottom = data.Contains("All") || data.Contains("Bottom"),
                ignoreLeft = data.Contains("All") || data.Contains("Left"),
                ignoreRight = data.Contains("All") || data.Contains("Right");

            rowCount = (grid.Children.Count / columnCount)
                        + (grid.Children.Count % columnCount > 0 ? 1 : 0);
            var brush = GetInnerBorderBrush(grid) ?? Brushes.Black;

            for (int i = 0; i < grid.Children.Count; i++)
            {
                var child = grid.Children[i];

                if (child is Control control)
                {
                    
                    int col = i % columnCount;
                    int row = i / columnCount;

                    double left = (col == 0 && ignoreLeft) ? 0 : width;
                    double top = (row == 0 && ignoreTop) ? 0 : width;

                    double right = ignoreRight ? 0 : ((col == columnCount - 1) ? width : 0);
                    double bottom = ignoreBottom ? 0 : ((row == rowCount - 1) ? width : 0);

                    var bt = new Thickness(left, top, right, bottom);

                    control.BorderBrush = brush;
                    control.BorderThickness = bt;
                }

            }
        }
    }
}