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.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;
using AI.Common.Interface;

namespace AILesionDescriptionGTGenerator
{
    public enum EnumLesionInfoEventType
    {
        DrawContour,
        DrawHorizontal,
        DrawVertical,
        LesionInfoUpdated,
        DrawPoint,
    }

    public class LesionInfoEventArgs : EventArgs
    {
        public EnumLesionInfoEventType EventType { get; }

        public LesionInfoEventArgs(EnumLesionInfoEventType eventType)
        {
            EventType = eventType;
        }
    }


    /// <summary>
    /// LesionInfoSelector.xaml 的交互逻辑
    /// </summary>
    public partial class LesionInfoSelector : UserControl
    {

        #region private variables

        private volatile LesionInfo _lesion;

        #endregion


        #region event

        public event EventHandler<LesionInfoEventArgs> NotifyLesionInfoEventArgs;

        #endregion


        #region 界面响应

        /// <summary>
        /// 形状描述 修改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnShapeSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ComboBoxShape.SelectedIndex != -1)
            {
                if (_lesion == null)
                {
                    _lesion = new LesionInfo();
                    LesionInfoUpdated();
                }
                _lesion.Shape = (EnumDesShapeValue)ComboBoxShape.SelectedIndex;
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            }
        }

        /// <summary>
        /// 生长方向 修改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnOrientationSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ComboBoxOrientation.SelectedIndex != -1)
            {
                if (_lesion == null)
                {
                    _lesion = new LesionInfo();
                    LesionInfoUpdated();
                }
                _lesion.Orientation = (EnumDesOrientationValue)ComboBoxOrientation.SelectedIndex;
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            }
        }

        /// <summary>
        /// 回声类型修改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnEchoPatternSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ComboBoxEchoPattern.SelectedIndex != -1)
            {
                if (_lesion == null)
                {
                    _lesion = new LesionInfo();
                    LesionInfoUpdated();
                }
                _lesion.EchoPattern = (EnumDesEchoPatternValue)ComboBoxEchoPattern.SelectedIndex;
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            }
        }

        /// <summary>
        /// 边界 修改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnBoundarySelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ComboBoxBoundary.SelectedIndex != -1)
            {
                if (_lesion == null)
                {
                    _lesion = new LesionInfo();
                    LesionInfoUpdated();
                }
                _lesion.Boundary = (EnumDesLesionBoundaryValue)ComboBoxBoundary.SelectedIndex;
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            }
        }

        /// <summary>
        /// 边缘 修改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnMarginSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (ComboBoxMargin.SelectedIndex != -1)
            {
                if (_lesion == null)
                {
                    _lesion = new LesionInfo();
                    LesionInfoUpdated();
                }
                _lesion.Margin = (EnumDesMarginValue)ComboBoxMargin.SelectedIndex;
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            }          
        }
        
        /// <summary>
        /// 画轮廓
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnBtnDrawContourClicked(object sender, RoutedEventArgs e)
        {
            if (_lesion == null)
            {
                _lesion = new LesionInfo();
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
                LesionInfoUpdated();
            }
            NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.DrawPoint/*DrawContour*/));
        }

        /// <summary>
        /// 画横径
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnBtnDrawHorizontalClicked(object sender, RoutedEventArgs e)
        {
            if (_lesion == null)
            {
                _lesion = new LesionInfo();
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
                LesionInfoUpdated();
            }
            NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.DrawHorizontal));
        }

        /// <summary>
        /// 画纵径
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnBtnDrawVerticalClicked(object sender, RoutedEventArgs e)
        {
            if (_lesion == null)
            {
                _lesion = new LesionInfo();
                NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
                LesionInfoUpdated();
            }
            NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.DrawVertical));
        }

        #endregion


        #region public

        public LesionInfoSelector()
        {
            InitializeComponent();
            InitializeComboBox();
            _lesion = null;
            LesionInfoUpdated();
        }
        public void SetLesionEmpty()
        {
            _lesion = null;
            LesionInfoUpdated();
        }
        public void SetLesion(LesionInfo lesion)
        {
            _lesion = lesion;
            LesionInfoUpdated();
        }
        public void SetContour(List<Point2D> contour)
        {
            if (_lesion == null)
            {
                _lesion = new LesionInfo();
                LesionInfoUpdated();
            }
            _lesion.Contour = contour;
            NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            ContourUpdated();
        }
        public void SetHorizontalAxis(Point2D horizontalP1, Point2D horizontalP2)
        {
            if (_lesion == null)
            {
                _lesion = new LesionInfo();
                LesionInfoUpdated();
            }
            _lesion.HorizontalPoint1 = horizontalP1;
            _lesion.HorizontalPoint2 = horizontalP2;
            NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            HorizontalAxisUpdated();
        }
        public void SetVerticalAxis(Point2D verticalP1, Point2D verticalP2)
        {
            if (_lesion == null)
            {
                _lesion = new LesionInfo();
                LesionInfoUpdated();
            }
            _lesion.VerticalPoint1 = verticalP1;
            _lesion.VerticalPoint2 = verticalP2;
            NotifyLesionInfoEventArgs?.Invoke(this, new LesionInfoEventArgs(EnumLesionInfoEventType.LesionInfoUpdated));
            VerticalAxisUpdated();
        }

        #endregion


        #region private

        /// <summary>
        /// 初始化下拉列表框
        /// </summary>
        private void InitializeComboBox()
        {
            // 形状
            ComboBoxShape.Items.Add("椭圆形");
            ComboBoxShape.Items.Add("类圆形");
            ComboBoxShape.Items.Add("不规则形");
            // 生长方向
            ComboBoxOrientation.Items.Add("平行");
            ComboBoxOrientation.Items.Add("非平行");
            // 回声类型
            ComboBoxEchoPattern.Items.Add("无回声");
            ComboBoxEchoPattern.Items.Add("低回声");
            ComboBoxEchoPattern.Items.Add("等回声");
            ComboBoxEchoPattern.Items.Add("高回声");
            ComboBoxEchoPattern.Items.Add("混合回声");
            // 边界
            ComboBoxBoundary.Items.Add("清晰");
            ComboBoxBoundary.Items.Add("模糊");
            // 边缘
            ComboBoxMargin.Items.Add("光整");
            ComboBoxMargin.Items.Add("不光整");
        }

        /// <summary>
        /// 病灶信息更新
        /// </summary>
        private void LesionInfoUpdated()
        {
            ContourUpdated();
            HorizontalAxisUpdated();
            VerticalAxisUpdated();
            ComboBoxShape.SelectionChanged -= OnShapeSelectionChanged;
            ComboBoxOrientation.SelectionChanged -= OnOrientationSelectionChanged;
            ComboBoxEchoPattern.SelectionChanged -= OnEchoPatternSelectionChanged;
            ComboBoxBoundary.SelectionChanged -= OnBoundarySelectionChanged;
            ComboBoxMargin.SelectionChanged -= OnMarginSelectionChanged;
            if (_lesion != null)
            {
                ComboBoxShape.SelectedIndex = (int)_lesion.Shape;
                ComboBoxOrientation.SelectedIndex = (int)_lesion.Orientation;
                ComboBoxEchoPattern.SelectedIndex = (int)_lesion.EchoPattern;
                ComboBoxBoundary.SelectedIndex = (int)_lesion.Boundary;
                ComboBoxMargin.SelectedIndex = (int)_lesion.Margin;
            }
            else
            {
                ComboBoxShape.SelectedIndex = -1;
                ComboBoxOrientation.SelectedIndex = -1;
                ComboBoxEchoPattern.SelectedIndex = -1;
                ComboBoxBoundary.SelectedIndex = -1;
                ComboBoxMargin.SelectedIndex = -1;
            }
            ComboBoxShape.SelectionChanged += OnShapeSelectionChanged;
            ComboBoxOrientation.SelectionChanged += OnOrientationSelectionChanged;
            ComboBoxEchoPattern.SelectionChanged += OnEchoPatternSelectionChanged;
            ComboBoxBoundary.SelectionChanged += OnBoundarySelectionChanged;
            ComboBoxMargin.SelectionChanged += OnMarginSelectionChanged;
        }

        /// <summary>
        /// 轮廓更新
        /// </summary>
        private void ContourUpdated()
        {
            string strContour = "";
            if (_lesion != null)
            {
                foreach (var point in _lesion.Contour)
                {
                    strContour += "{" + point.X + "," + point.Y + "}";
                }
            }
            TextBlockContours.Text = strContour;
        }

        /// <summary>
        /// 横径更新
        /// </summary>
        private void HorizontalAxisUpdated()
        {
            string strHorizon = "";
            if (_lesion != null)
            {
                if (_lesion.HorizontalPoint1 != null && _lesion.HorizontalPoint2 != null)
                {
                    strHorizon = "{" + _lesion.HorizontalPoint1.X + "," + _lesion.HorizontalPoint1.Y + "}," +
                        "{" + _lesion.HorizontalPoint2.X + "," + _lesion.HorizontalPoint2.Y + "}";
                }
            }
            TextBlockHorizontal.Text = strHorizon;  
        }

        /// <summary>
        /// 纵径更新
        /// </summary>
        private void VerticalAxisUpdated()
        {
            string strVertical = "";
            if (_lesion != null)
            {
                if (_lesion.VerticalPoint1 != null && _lesion.VerticalPoint2 != null)
                {
                    strVertical = "{" + _lesion.VerticalPoint1.X + "," + _lesion.VerticalPoint1.Y + "}," +
                        "{" + _lesion.VerticalPoint2.X + "," + _lesion.VerticalPoint2.Y + "}";
                }
            }
            TextBlockVertical.Text = strVertical;
        }

        #endregion


        #region properties

        /// <summary>
        /// 是否为空
        /// </summary>
        public bool IsEmpty => _lesion == null;

        /// <summary>
        /// 病灶
        /// </summary>
        public LesionInfo Lesion => _lesion;

        #endregion

    }
}