using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Interactivity;
using LehrerApp.Desktop.ViewModels.Groups;

namespace LehrerApp.Desktop.Views.Groups;

public partial class SeatAssessmentDialog : Window
{
    public SeatAssessmentDialog()
    {
        InitializeComponent();
        AddHandler(KeyDownEvent, OnPreviewKeyDown, RoutingStrategies.Tunnel, handledEventsToo: true);
    }

    protected override void OnOpened(EventArgs e)
    {
        base.OnOpened(e);
        Focus();
    }

    private void OnPreviewKeyDown(object? sender, KeyEventArgs e)
    {
        if (DataContext is not SeatAssessmentViewModel vm) return;
        var digit = DigitFromEvent(e);
        var clear = e.Key == Key.X || e.PhysicalKey == PhysicalKey.X;
        if (e.KeyModifiers.HasFlag(KeyModifiers.Control))
        {
            if (clear || digit is not null) vm.ApplyAttendanceShortcut(digit, clear);
            e.Handled = clear || digit is not null;
            return;
        }
        if (e.KeyModifiers.HasFlag(KeyModifiers.Alt))
        {
            if (clear || digit is not null) vm.ApplyHomeworkShortcut(digit, clear);
            e.Handled = clear || digit is not null;
            return;
        }
        if (e.KeyModifiers.HasFlag(KeyModifiers.Shift))
        {
            if (clear || digit is not null) vm.ApplyDayHighlightShortcut(digit, clear);
            e.Handled = clear || digit is not null;
            return;
        }
        if (digit is not null)
        {
            vm.SetRatingByNumber(digit.Value);
            e.Handled = true;
            return;
        }

        switch (e.Key)
        {
            case Key.Q: vm.SelectAspect(0); e.Handled = true; break;
            case Key.W: vm.SelectAspect(1); e.Handled = true; break;
            case Key.E: vm.SelectAspect(2); e.Handled = true; break;
            case Key.R: vm.SelectAspect(3); e.Handled = true; break;
            case Key.T: vm.SelectAspect(4); e.Handled = true; break;
            case Key.Left: vm.MoveAspect(-1); e.Handled = true; break;
            case Key.Right: vm.MoveAspect(1); e.Handled = true; break;
            case Key.OemPlus or Key.Add: vm.AdjustCurrentRating(1); e.Handled = true; break;
            case Key.OemMinus or Key.Subtract: vm.AdjustCurrentRating(-1); e.Handled = true; break;
            case Key.Back: vm.ClearCurrentRating(); e.Handled = true; break;
            case Key.Escape: Close(); e.Handled = true; break;
        }
    }

    private static int? DigitFromEvent(KeyEventArgs e) => e.PhysicalKey switch
    {
        PhysicalKey.Digit0 => 0, PhysicalKey.Digit1 => 1, PhysicalKey.Digit2 => 2,
        PhysicalKey.Digit3 => 3, PhysicalKey.Digit4 => 4, PhysicalKey.Digit5 => 5,
        PhysicalKey.Digit6 => 6, PhysicalKey.Digit7 => 7, PhysicalKey.Digit8 => 8,
        PhysicalKey.Digit9 => 9,
        _ => e.Key switch
        {
            Key.D0 or Key.NumPad0 => 0, Key.D1 or Key.NumPad1 => 1,
            Key.D2 or Key.NumPad2 => 2, Key.D3 or Key.NumPad3 => 3,
            Key.D4 or Key.NumPad4 => 4, Key.D5 or Key.NumPad5 => 5,
            Key.D6 or Key.NumPad6 => 6, Key.D7 or Key.NumPad7 => 7,
            Key.D8 or Key.NumPad8 => 8, Key.D9 or Key.NumPad9 => 9,
            _ => null,
        },
    };

    private void OnClose(object? sender, RoutedEventArgs e) => Close();
}