ClaudeDo/src/ClaudeDo.Ui/Views/TaskDetailView.axaml.cs

using System.ComponentModel;
using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Interactivity;
using Avalonia.Platform.Storage;
using ClaudeDo.Ui.ViewModels;

namespace ClaudeDo.Ui.Views;

public partial class TaskDetailView : UserControl
{
    public TaskDetailView()
    {
        InitializeComponent();
    }

    private async void OnFieldLostFocus(object? sender, RoutedEventArgs e)
    {
        if (DataContext is TaskDetailViewModel vm)
            await vm.SaveAsync();
    }

    private void OnSubtaskTitleLostFocus(object? sender, RoutedEventArgs e)
    {
        // Title change is handled by SubtaskItemViewModel.PropertyChanged → OnSubtaskPropertyChanged in the VM
    }

    private async void OnBrowseAgent(object? sender, RoutedEventArgs e)
    {
        var topLevel = TopLevel.GetTopLevel(this);
        if (topLevel is null) return;
        var files = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
        {
            Title = "Select Agent File",
            AllowMultiple = false,
            FileTypeFilter = new[] { new FilePickerFileType("Agent Files") { Patterns = ["*.md"] } },
        });
        if (files.Count == 0) return;
        var path = files[0].TryGetLocalPath();
        if (path is null) return;
        if (DataContext is TaskDetailViewModel vm)
        {
            vm.SetAgentFromPath(path);
            await vm.SaveAsync();
        }
    }

    private void OnTagInputKeyDown(object? sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter && DataContext is TaskDetailViewModel vm)
        {
            vm.AddTagCommand.Execute(null);
            e.Handled = true;
        }
    }

    public void FocusTitle()
    {
        this.FindControl<TextBox>("TitleBox")?.Focus();
    }

    private TaskDetailViewModel? _previousVm;

    protected override void OnDataContextChanged(EventArgs e)
    {
        base.OnDataContextChanged(e);
        if (_previousVm is not null)
            _previousVm.PropertyChanged -= OnViewModelPropertyChanged;
        _previousVm = DataContext as TaskDetailViewModel;
        if (_previousVm is not null)
            _previousVm.PropertyChanged += OnViewModelPropertyChanged;
    }

    private void OnViewModelPropertyChanged(object? sender, PropertyChangedEventArgs e)
    {
        if (e.PropertyName == nameof(TaskDetailViewModel.LiveText))
        {
            var box = this.FindControl<TextBox>("LiveOutputBox");
            if (box is not null)
            {
                box.CaretIndex = box.Text?.Length ?? 0;
            }
        }
    }
}