using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using DicomViewer.ViewModels;
using FellowOakDicom;
using FellowOakDicom.Imaging;
using Ookii.Dialogs.Wpf;

namespace DicomViewer.Views;

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow
{
    private readonly MainWindowViewModel _viewModel = new();

    public MainWindow()
    {
        //TODO::move this somewhere
        new DicomSetupBuilder()
            .RegisterServices(s => s.AddFellowOakDicom().AddImageManager<WinFormsImageManager>())
            .Build();

        InitializeComponent();
        DataContext = _viewModel;
    }

    private void OnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
    {
        if (e.Delta < 0)
        {
            ((MainWindowViewModel)DataContext).PrevImage();
        }
        else
        {
            ((MainWindowViewModel)DataContext).NextImage();
        }
        e.Handled = true;
    }

    private void OnImageMouseUp(object sender, MouseButtonEventArgs e)
    {
        (int x, int y) = GetPixelIndex(e.GetPosition(Image));
        _viewModel.UpdateCbfPlot(x, y);
    }

    private void OnImageMouseMove(object sender, MouseEventArgs e)
    {
        (int x, int y) = GetPixelIndex(e.GetPosition(Image));

        _viewModel.CursorPosition = $"{x}, {y}";
    }

    private (int x, int y) GetPixelIndex(Point pos)
    {
        if (_viewModel.CurrentImage == null)
            return (0, 0);

        int x = (int)Math.Floor(pos.X * _viewModel.CurrentImage.Image.PixelWidth / Image.ActualWidth);
        int y = (int)Math.Floor(pos.Y * _viewModel.CurrentImage.Image.PixelHeight / Image.ActualHeight);
        return (x, y);
    }

    private void OpenButtonOnClick(object sender, RoutedEventArgs e)
    {
        VistaFolderBrowserDialog dialog = new();

        if (!(dialog.ShowDialog() ?? false))
            return;

        _viewModel.LoadData(dialog.SelectedPath);
    }

    private void ToggleButtonOnChecked(object sender, RoutedEventArgs e)
    {
        _viewModel.CurrentImageName = (string)((RadioButton)sender).DataContext;
    }
}