using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;

namespace ClaudeDo.Ui.ViewModels.Islands;

/// <summary>
/// A sidebar folder row. Not a <see cref="ListNavItemViewModel"/> and not a
/// <see cref="ListKind"/> — a folder holds no tasks and is never selectable, so tapping it
/// toggles <see cref="IsCollapsed"/> instead of changing the selection.
/// </summary>
public sealed partial class ListFolderNavItemViewModel : ViewModelBase
{
    public required string Id { get; init; }
    [ObservableProperty] private string _name = "";
    [ObservableProperty] private string _iconKey = "Folder";
    [ObservableProperty] private bool _isCollapsed;
    // Sum of the child lists' counts — a collapsed folder still shows what's inside it.
    [ObservableProperty] private int _count;
    // Set while a dragged list row hovers over this folder header (move-into-folder target).
    [ObservableProperty] private bool _isDropTarget;

    public ObservableCollection<ListNavItemViewModel> Lists { get; } = new();
}