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

namespace Tango.SharedUI.Controls
{
    public class HexagonControl : Shape
    {
        private Geometry _geometry;
        private ScaleTransform _scale;

        public Point[] Points { get; set; }

        protected override Geometry DefiningGeometry => _geometry;

        public bool IsSelected
        {
            get { return (bool)GetValue(IsSelectedProperty); }
            set { SetValue(IsSelectedProperty, value); }
        }
        public static readonly DependencyProperty IsSelectedProperty =
            DependencyProperty.Register("IsSelected", typeof(bool), typeof(HexagonControl), new PropertyMetadata(false, (d, e) => (d as HexagonControl).OnIsSelectedChanged()));

        public int Row
        {
            get { return (int)GetValue(RowProperty); }
            set { SetValue(RowProperty, value); }
        }
        public static readonly DependencyProperty RowProperty =
            DependencyProperty.Register("Row", typeof(int), typeof(HexagonControl), new PropertyMetadata(0));

        public int Column
        {
            get { return (int)GetValue(ColumnProperty); }
            set { SetValue(ColumnProperty, value); }
        }
        public static readonly DependencyProperty ColumnProperty =
            DependencyProperty.Register("Column", typeof(int), typeof(HexagonControl), new PropertyMetadata(0));



        public bool DisplayGridPosition
        {
            get { return (bool)GetValue(DisplayGridPositionProperty); }
            set { SetValue(DisplayGridPositionProperty, value); }
        }
        public static readonly DependencyProperty DisplayGridPositionProperty =
            DependencyProperty.Register("DisplayGridPosition", typeof(bool), typeof(HexagonControl), new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.AffectsRender));

        private void OnIsSelectedChanged()
        {
            if (IsSelected)
            {
                StrokeThickness = 3;
            }
            else
            {
                StrokeThickness = 1;
            }
        }

        public HexagonControl(Point[] points, int row, int column)
        {
            Points = points;
            Row = row;
            Column = column;

            _geometry = new PathGeometry(new PathFigure[]
            {
                 new PathFigure(points[0],new PathSegment[]
                 {
                      new PolyLineSegment(points.Skip(1), true),
                 },true),
            });

            RenderTransformOrigin = new Point(0.8, 0.8);
            _scale = new ScaleTransform(1, 1);
            RenderTransform = _scale;
        }

        protected override void OnRender(DrawingContext drawingContext)
        {
            base.OnRender(drawingContext);

            if (DisplayGridPosition)
            {
                Typeface typeface = new Typeface("Times New Roman");

                double em_size = 16;
#pragma warning disable CS0618 // Type or member is obsolete
                FormattedText formatted_text = new FormattedText(
                    Row + "," + Column, CultureInfo.CurrentUICulture,
                    FlowDirection.LeftToRight,
                    typeface, em_size, Brushes.Black);
#pragma warning restore CS0618 // Type or member is obsolete

                // Center the text horizontally.
                formatted_text.TextAlignment = TextAlignment.Center;

                var rect = _geometry.GetFlattenedPathGeometry().Bounds;

                // Find the center of the client area.
                double xmid = rect.Left + rect.Width / 2;
                double ymid = rect.Top + rect.Height / 2;
                Point center = new Point(xmid, ymid - formatted_text.Height / 2);

                drawingContext.DrawText(formatted_text, center);
            }
        }

        protected override void OnMouseEnter(MouseEventArgs e)
        {
            base.OnMouseEnter(e);

            if (!IsSelected)
            {
                _scale.ScaleX = 1.1;
                _scale.ScaleY = 1.1;
            }
        }

        protected override void OnMouseLeave(MouseEventArgs e)
        {
            base.OnMouseLeave(e);

            _scale.ScaleX = 1;
            _scale.ScaleY = 1;
        }
    }
}