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;
using System.Windows.Shapes;

namespace RealTimeGraphEx.Components
{
    public class GridLines : ComponentBase
    {
        private RealTimeGraphExBase lastGraph;

        #region Properties

        public int Rows
        {
            get { return (int)GetValue(RowsProperty); }
            set { SetValue(RowsProperty, value); }
        }
        public static readonly DependencyProperty RowsProperty =
            DependencyProperty.Register("Rows", typeof(int), typeof(GridLines), new PropertyMetadata(5));

        public int Columns
        {
            get { return (int)GetValue(ColumnsProperty); }
            set { SetValue(ColumnsProperty, value); }
        }
        public static readonly DependencyProperty ColumnsProperty =
            DependencyProperty.Register("Columns", typeof(int), typeof(GridLines), new PropertyMetadata(9));

        public Brush GridBrush
        {
            get { return (Brush)GetValue(GridBrushProperty); }
            set { SetValue(GridBrushProperty, value); }
        }
        public static readonly DependencyProperty GridBrushProperty =
            DependencyProperty.Register("GridBrush", typeof(Brush), typeof(GridLines), new PropertyMetadata(Brushes.Silver));

        #endregion

        public GridLines()
        {
            Location = ComponentLocationEnum.Back;
            this.SizeChanged += (x, y) => { Render(Graph); };
        }

        public void Render()
        {
            Render(lastGraph);
        }

        public override void Render(RealTimeGraphExBase graph, bool animate = false)
        {
            if (graph == null) return;

            lastGraph = graph;

            Grid grid = new Grid();

            grid.Children.Clear();
            grid.ColumnDefinitions.Clear();
            grid.RowDefinitions.Clear();

            for (int i = 0; i < Rows; i++)
            {
                RowDefinition row = new RowDefinition();
                row.Height = new GridLength(1, GridUnitType.Star);
                grid.RowDefinitions.Add(row);

                RowDefinition rowLabels = new RowDefinition();
                row.Height = new GridLength(1, GridUnitType.Star);
            }

            for (int i = 0; i < Columns; i++)
            {
                ColumnDefinition column = new ColumnDefinition();
                column.Width = new GridLength(1, GridUnitType.Star);
                grid.ColumnDefinitions.Add(column);
            }

            for (int i = 0; i < grid.RowDefinitions.Count - 1; i++)
            {
                Rectangle rec = new Rectangle();
                rec.Height = 1;
                rec.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch;
                rec.VerticalAlignment = System.Windows.VerticalAlignment.Bottom;
                rec.Fill = GridBrush;
                Grid.SetRow(rec, i);
                Grid.SetColumn(rec, 0);
                Grid.SetColumnSpan(rec, grid.ColumnDefinitions.Count);
                grid.Children.Add(rec);
            }

            for (int i = 0; i < grid.ColumnDefinitions.Count - 1; i++)
            {
                Rectangle rec = new Rectangle();
                rec.Width = 1;
                rec.HorizontalAlignment = System.Windows.HorizontalAlignment.Right;
                rec.VerticalAlignment = System.Windows.VerticalAlignment.Stretch;
                rec.Fill = GridBrush;
                Grid.SetColumn(rec, i);
                Grid.SetRow(rec, 0);
                Grid.SetRowSpan(rec, grid.RowDefinitions.Count);

                grid.Children.Add(rec);
            }

            this.Content = grid;

            //if (!graph.gridBack.Children.Contains(this))
            //{
            //    this.RemoveFromParent();
            //    graph.gridBack.Children.Add(this);
            //}
        }
    }
}