using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using ytLive.Services;
using ytLive.ViewModels;

namespace ytLive;

public partial class HotkeyConfigDialog : Window
{
    private readonly HotkeyConfigViewModel _viewModel;

    public HotkeyConfigDialog(HotkeyConfigViewModel viewModel)
    {
        InitializeComponent();
        DataContext = viewModel;
        _viewModel = viewModel;
        viewModel.SaveRequested += () => DialogResult = true;
        viewModel.CancelRequested += () => DialogResult = false;
    }

    private void ChordButton_Click(object sender, RoutedEventArgs e)
    {
        if (sender is not FrameworkElement { Tag: HotkeyBindingRow row }) return;

        _viewModel.StartCaptureCommand.Execute(row);

        // Enter capture mode: listen for the next key combo on this specific button.
        if (row.IsCapturing && sender is Button button)
        {
            button.PreviewKeyDown += ChordButton_PreviewKeyDown;
            button.Focus();
        }
    }

    private void ChordButton_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        if (sender is not Button button) return;
        button.PreviewKeyDown -= ChordButton_PreviewKeyDown;

        e.Handled = true;

        // Escape cancels capture without changing the binding.
        if (e.Key == Key.Escape)
        {
            _viewModel.CancelCapture();
            return;
        }

        // Skip bare modifier-only presses — wait for a real key.
        var key = e.Key == Key.System ? e.SystemKey : e.Key;
        if (key is Key.LeftCtrl or Key.RightCtrl or Key.LeftAlt or Key.RightAlt
                or Key.LeftShift or Key.RightShift or Key.LWin or Key.RWin)
        {
            // Re-enter capture — the button is still focused, re-subscribe.
            button.PreviewKeyDown += ChordButton_PreviewKeyDown;
            return;
        }

        var chord = HotkeyChord.FromWpf(key, Keyboard.Modifiers);
        _viewModel.AssignCapturedChord(chord);
    }

    private void UnbindButton_Click(object sender, RoutedEventArgs e)
    {
        if (sender is FrameworkElement { Tag: HotkeyBindingRow row })
            _viewModel.UnbindCommand.Execute(row);
    }
}