using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WindowedMyApp
{
    /// <summary>
    /// Логика взаимодействия для DiagramPage.xaml
    /// </summary>
    public partial class DiagramPage : Page
    {
        private List<Category> Categories { get; set; }

        public DiagramPage()
        {
            InitializeComponent();

            float pieWidth = 650, pieHeight = 650, centerX = pieWidth / 2, centerY = pieHeight / 2, radius = pieWidth / 2;
            mainCanvas.Width = pieWidth;
            mainCanvas.Height = pieHeight;

            Categories = new List<Category>()
            {
                #region test #1
                //new Category
                //{
                //    Title = "Category#01",
                //    Percentage = 10,
                //    ColorBrush = Brushes.Gold,
                //},

                //new Category
                //{
                //    Title = "Category#02",
                //    Percentage = 30,
                //    ColorBrush = Brushes.Pink,
                //},

                //new Category
                //{
                //    Title = "Category#03",
                //    Percentage = 60,
                //    ColorBrush = Brushes.CadetBlue,
                //}, 
                #endregion

                #region test #2
                //new Category
                //{
                //    Title = "Category#01",
                //    Percentage = 20,
                //    ColorBrush = Brushes.Gold,
                //},

                //new Category
                //{
                //    Title = "Category#02",
                //    Percentage = 80,
                //    ColorBrush = Brushes.LightBlue,
                //}, 
                #endregion

                #region test #3
                //new Category
                //{
                //    Title = "Category#01",
                //    Percentage = 50,
                //    ColorBrush = Brushes.Gold,
                //},

                //new Category
                //{
                //    Title = "Category#02",
                //    Percentage = 50,
                //    ColorBrush = Brushes.LightBlue,
                //}, 
                #endregion

                #region test #4
                //new Category
                //{
                //    Title = "Category#01",
                //    Percentage = 30,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4472C4")),
                //},

                //new Category
                //{
                //    Title = "Category#02",
                //    Percentage = 30,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#ED7D31")),
                //},

                //new Category
                //{
                //    Title = "Category#03",
                //    Percentage = 20,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FFC000")),
                //},

                //new Category
                //{
                //    Title = "Category#04",
                //    Percentage = 20,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#5B9BD5")),
                //},

                //new Category
                //{
                //    Title = "Category#05",
                //    Percentage = 10,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#A5A5A5")),
                //}, 
                #endregion

                #region test #5
                //new Category
                //{
                //    Title = "Category#01",
                //    Percentage = 20,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4472C4")),
                //},

                //new Category
                //{
                //    Title = "Category#02",
                //    Percentage = 30,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#ED7D31")),
                //},

                //new Category
                //{
                //    Title = "Category#03",
                //    Percentage = 20,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FFC000")),
                //},

                //new Category
                //{
                //    Title = "Category#04",
                //    Percentage = 20,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#5B9BD5")),
                //},

                //new Category
                //{
                //    Title = "Category#05",
                //    Percentage = 10,
                //    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#A5A5A5")),
                //}, 
                #endregion

                #region test #6
                new Category
                {
                    Title = "Category#01",
                    Percentage = 20,
                    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4472C4")),
                },

                new Category
                {
                    Title = "Category#02",
                    Percentage = 60,
                    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#ED7D31")),
                },

                new Category
                {
                    Title = "Category#03",
                    Percentage = 5,
                    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FFC000")),
                },

                new Category
                {
                    Title = "Category#04",
                    Percentage = 10,
                    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#5B9BD5")),
                },

                new Category
                {
                    Title = "Category#05",
                    Percentage = 5,
                    ColorBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#A5A5A5")),
                }, 
                #endregion
            };

            detailsItemsControl.ItemsSource = Categories;

            // draw pie
            float angle = 0, prevAngle = 0;
            foreach (var category in Categories)
            {
                double line1X = (radius * Math.Cos(angle * Math.PI / 180)) + centerX;
                double line1Y = (radius * Math.Sin(angle * Math.PI / 180)) + centerY;

                angle = category.Percentage * (float)360 / 100 + prevAngle;
                Debug.WriteLine(angle);

                double arcX = (radius * Math.Cos(angle * Math.PI / 180)) + centerX;
                double arcY = (radius * Math.Sin(angle * Math.PI / 180)) + centerY;

                var line1Segment = new LineSegment(new Point(line1X, line1Y), false);
                double arcWidth = radius, arcHeight = radius;
                bool isLargeArc = category.Percentage > 50;
                var arcSegment = new ArcSegment()
                {
                    Size = new Size(arcWidth, arcHeight),
                    Point = new Point(arcX, arcY),
                    SweepDirection = SweepDirection.Clockwise,
                    IsLargeArc = isLargeArc,
                };
                var line2Segment = new LineSegment(new Point(centerX, centerY), false);

                var pathFigure = new PathFigure(
                    new Point(centerX, centerY),
                    new List<PathSegment>()
                    {
                        line1Segment,
                        arcSegment,
                        line2Segment,
                    },
                    true);

                var pathFigures = new List<PathFigure>() { pathFigure, };
                var pathGeometry = new PathGeometry(pathFigures);
                var path = new Path()
                {
                    Fill = category.ColorBrush,
                    Data = pathGeometry,
                };
                mainCanvas.Children.Add(path);

                prevAngle = angle;


                // draw outlines
                var outline1 = new Line()
                {
                    X1 = centerX,
                    Y1 = centerY,
                    X2 = line1Segment.Point.X,
                    Y2 = line1Segment.Point.Y,
                    Stroke = Brushes.White,
                    StrokeThickness = 5,
                };
                var outline2 = new Line()
                {
                    X1 = centerX,
                    Y1 = centerY,
                    X2 = arcSegment.Point.X,
                    Y2 = arcSegment.Point.Y,
                    Stroke = Brushes.White,
                    StrokeThickness = 5,
                };

                mainCanvas.Children.Add(outline1);
                mainCanvas.Children.Add(outline2);
            }
        }
    }
}