using CSScripting;
using OpenCvSharp;
using OpenCvSharp.Extensions;
using OpenCvSharp.WpfExtensions;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using TeamAAS_VP.Core;
using TeamAAS_VP.Enums;
using TeamAAS_VP.Models;

namespace TeamAAS_VP.Controls
{
    public partial class FocusAnalyzerControl : UserControl
    {
        private FocusAnalyzerViewModel ViewModel;

        // 鼠标状态
        private bool _isMouseDown = false;
        private System.Windows.Point _mouseDownPoint;

        public FocusAnalyzerControl()
        {
            InitializeComponent();
            Loaded += OnLoaded;
        }

        private void OnLoaded(object sender, RoutedEventArgs e)
        {
            // 初始化ViewModel
            if (DataContext == null)
                DataContext = new FocusAnalyzerViewModel();
            ViewModel=DataContext as FocusAnalyzerViewModel;
        }

        #region 鼠标事件处理

        private void ImageDisplay_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (ViewModel == null) return;

            _isMouseDown = true;
            _mouseDownPoint = e.GetPosition(ImageDisplay);

            // 处理ROI操作
            if (ViewModel.CurrentRoi != null)
            {
                // 检查是否点击了ROI
                if (ViewModel.StartRoiDrag(_mouseDownPoint))
                {
                    CaptureMouse();
                    return;
                }
            }

            // 开始绘制新ROI
            if (ViewModel.RoiMode == RoiOperationMode.Draw)
            {
                ViewModel.StartRoiDrawing(_mouseDownPoint);
                CaptureMouse();
            }
        }

        private void ImageDisplay_MouseMove(object sender, MouseEventArgs e)
        {
            if (ViewModel == null || !_isMouseDown) return;

            var currentPoint = e.GetPosition(ImageDisplay);

            // 处理ROI拖动
            if (ViewModel.RoiMode != RoiOperationMode.Draw && ViewModel.CurrentRoi != null)
            {
                ViewModel.UpdateRoiDrag(currentPoint);
                UpdateRoiVisual();
            }
            // 处理ROI绘制
            else if (ViewModel.RoiMode == RoiOperationMode.Draw)
            {
                ViewModel.UpdateRoiDrawing(currentPoint);
                UpdateRoiVisual();
            }
        }

        private void ImageDisplay_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            if (ViewModel == null || !_isMouseDown) return;

            _isMouseDown = false;
            ReleaseMouseCapture();

            if (ViewModel.RoiMode == RoiOperationMode.Draw)
            {
                ViewModel.FinishRoiDrawing();
            }
            else
            {
                ViewModel.FinishRoiDrag();
            }
        }

        #endregion

        #region ROI可视化更新

        private void UpdateRoiVisual()
        {
            if (ViewModel?.CurrentRoi == null) return;

            // 更新ROI矩形位置和大小
            Canvas.SetLeft(RoiRectangle, ViewModel.CurrentRoi.X);
            Canvas.SetTop(RoiRectangle, ViewModel.CurrentRoi.Y);
            RoiRectangle.Width = ViewModel.CurrentRoi.Width;
            RoiRectangle.Height = ViewModel.CurrentRoi.Height;

            // 更新控制点位置
            UpdateRoiHandles();
        }

        private void UpdateRoiHandles()
        {
            if (ViewModel?.CurrentRoi == null) return;

            var roi = ViewModel.CurrentRoi;

            // 更新角点
            UpdateHandlePosition(TopLeftHandle, roi.X, roi.Y);
            UpdateHandlePosition(TopRightHandle, roi.X + roi.Width, roi.Y);
            UpdateHandlePosition(BottomLeftHandle, roi.X, roi.Y + roi.Height);
            UpdateHandlePosition(BottomRightHandle, roi.X + roi.Width, roi.Y + roi.Height);

            // 更新边中点
            UpdateHandlePosition(TopHandle, roi.X + roi.Width / 2, roi.Y);
            UpdateHandlePosition(RightHandle, roi.X + roi.Width, roi.Y + roi.Height / 2);
            UpdateHandlePosition(BottomHandle, roi.X + roi.Width / 2, roi.Y + roi.Height);
            UpdateHandlePosition(LeftHandle, roi.X, roi.Y + roi.Height / 2);

            // 更新旋转控制点
            UpdateRotateHandlePosition(roi);
        }

        private void UpdateHandlePosition(FrameworkElement handle, double x, double y)
        {
            if (handle == null) return;

            Canvas.SetLeft(handle, x - handle.Width / 2);
            Canvas.SetTop(handle, y - handle.Height / 2);
        }

        private void UpdateRotateHandlePosition(RotatedRect roi)
        {
            if (RotateHandle == null) return;

            // 旋转控制点在矩形顶部中心上方
            double centerX = roi.X + roi.Width / 2;
            double centerY = roi.Y + roi.Height / 2;

            // 计算旋转后的位置
            double angleRad = roi.Angle * Math.PI / 180;
            double radius = Math.Max(roi.Width, roi.Height) / 2 + 20; // 距离中心20像素

            double x = centerX + radius * Math.Sin(angleRad);
            double y = centerY - radius * Math.Cos(angleRad);

            // 设置位置
            RotateHandle.RenderTransform = new RotateTransform(roi.Angle);
            Canvas.SetLeft(RotateHandle, x - 5); // 5是三角形宽度的一半
            Canvas.SetTop(RotateHandle, y - 5); // 5是三角形高度的一半
        }

        #endregion

        #region 依赖属性

        // CurrentImage依赖属性
        public static readonly DependencyProperty CurrentImageProperty =
            DependencyProperty.Register("CurrentImage", typeof(ImageSource), typeof(FocusAnalyzerControl),
                new PropertyMetadata(null, OnCurrentImageChanged));

        public ImageSource CurrentImage
        {
            get => (ImageSource)GetValue(CurrentImageProperty);
            set => SetValue(CurrentImageProperty, value);
        }

        private static void OnCurrentImageChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = d as FocusAnalyzerControl;
            if (control.ViewModel != null)
                control.ViewModel.CurrentImage = e.NewValue as ImageSource;
        }

        // Parameters依赖属性
        public static readonly DependencyProperty ParametersProperty =
            DependencyProperty.Register("Parameters", typeof(AnalysisParameters), typeof(FocusAnalyzerControl),
                new PropertyMetadata(new AnalysisParameters(), OnParametersChanged));

        public AnalysisParameters Parameters
        {
            get => (AnalysisParameters)GetValue(ParametersProperty);
            set => SetValue(ParametersProperty, value);
        }

        private static void OnParametersChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = d as FocusAnalyzerControl;
            if (control.ViewModel != null)
                control.ViewModel.Parameters = e.NewValue as AnalysisParameters;
        }

        // CurrentResult依赖属性
        public static readonly DependencyProperty CurrentResultProperty =
            DependencyProperty.Register("CurrentResult", typeof(AnalysisResult), typeof(FocusAnalyzerControl),
                new PropertyMetadata(new AnalysisResult(), OnCurrentResultChanged));

        public AnalysisResult CurrentResult
        {
            get => (AnalysisResult)GetValue(CurrentResultProperty);
            set => SetValue(CurrentResultProperty, value);
        }

        private static void OnCurrentResultChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = d as FocusAnalyzerControl;
            if (control.ViewModel != null)
                control.ViewModel.CurrentResult = e.NewValue as AnalysisResult;
        }

        // StartAnalysisCommand依赖属性
        public static readonly DependencyProperty StartAnalysisCommandProperty =
            DependencyProperty.Register("StartAnalysisCommand", typeof(ICommand), typeof(FocusAnalyzerControl),
                new PropertyMetadata(null, OnStartAnalysisCommandChanged));

        public ICommand StartAnalysisCommand
        {
            get => (ICommand)GetValue(StartAnalysisCommandProperty);
            set => SetValue(StartAnalysisCommandProperty, value);
        }

        private static void OnStartAnalysisCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = d as FocusAnalyzerControl;
            if (control.ViewModel != null)
                control.ViewModel.StartAnalysisCommand = e.NewValue as ICommand;
        }

        // 其他命令和属性的依赖属性...

        #endregion

        #region 公共方法

        /// <summary>
        /// 处理图像帧
        /// </summary>
        public async Task ProcessImageFrameAsync(OpenCvSharp.Mat frame)
        {
            if (ViewModel != null)
                await ViewModel.ProcessImageFrameAsync(frame);
        }

        /// <summary>
        /// 执行单次分析
        /// </summary>
        public void PerformAnalysis(OpenCvSharp.Mat frame)
        {
            ViewModel?.PerformAnalysis(frame);
        }

        /// <summary>
        /// 获取当前ROI区域
        /// </summary>
        public OpenCvSharp.Rect? GetCurrentRoiRect()
        {
            if (ViewModel?.CurrentRoi == null)
                return null;

            return new OpenCvSharp.Rect(
                (int)ViewModel.CurrentRoi.X,
                (int)ViewModel.CurrentRoi.Y,
                (int)ViewModel.CurrentRoi.Width,
                (int)ViewModel.CurrentRoi.Height);
        }

        /// <summary>
        /// 获取旋转ROI
        /// </summary>
        public OpenCvSharp.RotatedRect? GetCurrentRotatedRoi()
        {
            if (ViewModel?.CurrentRoi == null)
                return null;

            return ViewModel.CurrentRoi.ToCvRotatedRect();
        }

        #endregion
    }
}