using AuroraUIComponent.Util;
using System;
using System.Linq;
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 static WeldingCommon.Views.UCManualRCCOperationViewModel;

namespace WeldingCommon.Views
{
    /// <summary>
    /// Interaction logic for UCManualRCCOperation.xaml
    /// </summary>
    public partial class UCManualRCCOperation : UserControl
    {
        private UCManualRCCOperationViewModel _ViewModel;

        private System.Windows.Point _StartPoint;
        private System.Windows.Point _OriginPoint;
        private double _InitialScaleX;
        private double _InitialScaleY;

        public UCManualRCCOperation(UCManualRCCOperationViewModel viewModel)
        {
            InitializeComponent();

            _ViewModel = viewModel;
            DataContext = _ViewModel;

            ImageControl.MouseWheel += ImageCanvas_MouseWheel;
            ImageControl.MouseLeftButtonDown += ImageCanvas_MouseLeftButtonDown;
            ImageControl.MouseLeftButtonUp += ImageCanvas_MouseLeftButtonUp;
            ImageControl.MouseMove += ImageCanvas_MouseMove;

            // Store the initial scale of the image
            this.Loaded += (s, e) => {
                var transformGroup = (TransformGroup)ImageControl.RenderTransform;
                var scaleTransform = (ScaleTransform)transformGroup.Children[0];
                _InitialScaleX = scaleTransform.ScaleX;
                _InitialScaleY = scaleTransform.ScaleY;
            };
        }

        private void ImageCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
        {
            var position = e.GetPosition(ImageControl);
            var transformGroup = (TransformGroup)ImageControl.RenderTransform;
            var scaleTransform = (ScaleTransform)transformGroup.Children[0];
            var translateTransform = (TranslateTransform)transformGroup.Children[1];

            double zoom = e.Delta > 0 ? 0.5 : -0.5;
            double newScaleX = scaleTransform.ScaleX + zoom;
            double newScaleY = scaleTransform.ScaleY + zoom;

            // Ensure the new scale is not smaller than the initial scale
            if (newScaleX < _InitialScaleX || newScaleY < _InitialScaleY) {
                newScaleX = _InitialScaleX;
                newScaleY = _InitialScaleY;
            }

            // Calculate the new position of the image to keep the zoom centered on the mouse pointer
            double offsetX = position.X - (position.X * newScaleX / scaleTransform.ScaleX);
            double offsetY = position.Y - (position.Y * newScaleY / scaleTransform.ScaleY);

            scaleTransform.ScaleX = newScaleX;
            scaleTransform.ScaleY = newScaleY;

            translateTransform.X -= offsetX;
            translateTransform.Y -= offsetY;
        }

        private void ImageCanvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (e.ButtonState == MouseButtonState.Pressed) {
                _StartPoint = e.GetPosition(this);
                _OriginPoint = new System.Windows.Point(ImageTranslateTransform.X, ImageTranslateTransform.Y);
                ImageControl.Cursor = Cursors.Hand;
                ImageControl.CaptureMouse();
            }
        }

        private void ImageCanvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            ImageControl.ReleaseMouseCapture();
            ImageControl.Cursor = Cursors.Arrow;
        }

        private void ImageCanvas_MouseMove(object sender, MouseEventArgs e)
        {
            if (ImageControl.IsMouseCaptured) {
                Vector v = _StartPoint - e.GetPosition(this);
                ImageTranslateTransform.X = _OriginPoint.X - v.X;
                ImageTranslateTransform.Y = _OriginPoint.Y - v.Y;
            }
        }

        #region Grid ContourCorrectionInfoList
        private void PasteCommand_Executed_ContourCorrectionInfoList(object sender, ExecutedRoutedEventArgs e)
        {
            if (GridEditorContourCorrectionInfoList.PasteFromClipboard(null)) {
                GridEditorContourCorrectionInfoList.CommitEdit();
                GridEditorContourCorrectionInfoList.Items.Refresh();
            }
        }

        private void GridEditorContourCorrectionInfoList_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e)
        {
            if (_ViewModel != null) {
                foreach (var item in e.RemovedCells) {
                    if (item.Item is ContourCorrectionInfo) {
                        _ViewModel.SelectedContourCorrectionInfoList.Remove(item.Item as ContourCorrectionInfo);
                    }
                }
                foreach (var item in e.AddedCells) {
                    if (item.Item is ContourCorrectionInfo) {
                        var newItem = item.Item as ContourCorrectionInfo;
                        if (!_ViewModel.SelectedContourCorrectionInfoList.Contains(newItem)) {
                            _ViewModel.SelectedContourCorrectionInfoList.Add(newItem);
                        }

                    }
                }
            }
        }

        private void GridEditorContourCorrectionInfoList_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            if (!IsVisible) {
                _ViewModel.SelectedContourCorrectionInfoList.Clear();
                GridEditorContourCorrectionInfoList.UnselectAllCells();
            } else {

            }
        }

        private void GridEditorContourCorrectionInfoList_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Escape) {
                if (sender is DataGrid dg) {
                    dg.SelectedItem = null;
                }
                if (sender is System.Windows.Controls.ListBox lb) {
                    lb.SelectedItem = null;
                }
            }
        }
        #endregion


    }
}