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;
                }

                if (child is Border border)
                {

                    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);

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

            }
        }

        public static void RefreshLineSize(UniformGrid grid)
        {
            Thickness parentThickness = default;
            Brush brush = default;
            var parent = grid.Parent;
            if (parent is System.Windows.Controls.Control parentControl)
            {
                parentThickness = parentControl.BorderThickness;
                brush = parentControl.BorderBrush;
            }
            else if (parent is Border border)
            {
                parentThickness = border.BorderThickness;
                brush = border.BorderBrush;
            }

            //var value = GetLineSize(grid);
            //if (value == null) return;
            //double size = (double)value;

            int totalCount = grid.Children.Count;
            var columnCount = grid.Columns;
            int rowCount = grid.Rows;

            for (int i = 0; i < totalCount; i++)
            {
                int row = i / columnCount;
                int rest = i % columnCount;


                var cell = grid.Children[i];

                var bt = new Thickness(rest == 0 ? 0 : parentThickness.Left,
                    row == 0 ? 0 : parentThickness.Top,
                    rest == columnCount - 1 ? 0 : parentThickness.Right,
                    row == rowCount - 1 ? 0 : parentThickness.Bottom);

                if (cell is Control child)
                {
                    child.BorderThickness = bt;
                    child.BorderBrush = brush;
                }
            }
        }

        public static void RefreshDefault(UniformGrid grid, ControlTemplate template)
        {
            int totalCount = grid.Columns * grid.Rows;

            int rest = totalCount - grid.Children.Count;
            if (rest <= 0) return;

            for (int i = 0; i < rest; i++)
            {
                var control = new Control
                {
                    Template = template
                };
                grid.Children.Add(control);
            }
        }

        public static ControlTemplate GetDefaultTemplate(DependencyObject obj)
        {
            return (ControlTemplate)obj.GetValue(DefaultTemplateProperty);
        }
        public static void SetDefaultTemplate(DependencyObject obj, ControlTemplate value)
        {
            obj.SetValue(DefaultTemplateProperty, value);
        }
        public static readonly DependencyProperty DefaultTemplateProperty =
            DependencyProperty.RegisterAttached("DefaultTemplate", typeof(ControlTemplate), typeof(UniformGrid),
                new PropertyMetadata(null, OnDefaultTemplateChanged));

        private static void OnDefaultTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is UniformGrid grid)
            {
                if (e.Property == DefaultTemplateProperty)
                {
                    var tem = GetDefaultTemplate(grid);
                    if (tem == null) return;

                    //var rowCount = grid.Rows;
                    int columnCount = grid.Columns;
                    int totalCount = grid.Children.Count;
                    int rowCount = totalCount / columnCount;
                    int last = totalCount % columnCount;
                    if (last == 0)
                    {
                        return;
                    }
                    int addCount = columnCount - last;

                    for (int i = 0; i < addCount; i++)
                    {
                        Button u = new Button
                        {
                            Template = tem
                        };
                        grid.Children.Add(u);
                    }
                }
            }
        }
    }
}