using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace Tango.SharedUI.Controls
{
    public class TableGrid : Grid
    {
        public GridLength RowHeight
        {
            get { return (GridLength)GetValue(RowHeightProperty); }
            set { SetValue(RowHeightProperty, value); }
        }
        public static readonly DependencyProperty RowHeightProperty =
            DependencyProperty.Register("RowHeight", typeof(GridLength), typeof(TableGrid), new FrameworkPropertyMetadata(new GridLength(1, GridUnitType.Star), FrameworkPropertyMetadataOptions.AffectsRender));


        public TableGrid()
        {
            ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Auto) });
            ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) });
            this.Loaded += TableGrid_Loaded;
        }

        protected override void OnRender(DrawingContext dc)
        {
            base.OnRender(dc);
        }

        private void TableGrid_Loaded(object sender, RoutedEventArgs e)
        {
            InvalidateGrid();
        }

        protected override void OnVisualChildrenChanged(DependencyObject visualAdded, DependencyObject visualRemoved)
        {
            base.OnVisualChildrenChanged(visualAdded, visualRemoved);
            InvalidateGrid();
        }

        protected override Size ArrangeOverride(Size arrangeSize)
        {
            return base.ArrangeOverride(arrangeSize);
        }

        private void InvalidateGrid()
        {
            RowDefinitions.Clear();
            RowDefinitions.Add(new RowDefinition() { Height = RowHeight });

            int currentRow = 0;

            for (int i = 0; i < Children.Count; i++)
            {
                SetRow(Children[i], currentRow);

                if (i % 2 != 0)
                {
                    SetColumn(Children[i], 1);
                    (Children[i] as FrameworkElement).Margin = new Thickness(20, 0, 0, 0);
                    currentRow++;
                    RowDefinitions.Add(new RowDefinition() { Height = RowHeight });
                }

                (Children[i] as FrameworkElement).VerticalAlignment = VerticalAlignment.Bottom;
            }
        }
    }
}