using Lattice.Core.Models;
using Lattice.UI.DragDrop;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;

namespace Lattice.UI.Controls;

/// <summary>
/// Представляет визуальный контейнер для содержимого (панели или документа) в системе Lattice.
/// </summary>
[TemplatePart(Name = "HeaderPresenter", Type = typeof(FrameworkElement))]
[TemplatePart(Name = "ContentPresenter", Type = typeof(ContentPresenter))]
[TemplatePart(Name = "PART_CloseButton", Type = typeof(Button))] // Добавлено для ясности
public class LatticePane : ContentControl
{
    public static readonly DependencyProperty TitleProperty =
        DependencyProperty.Register(nameof(Title), typeof(string), typeof(LatticePane), new PropertyMetadata(string.Empty));

    public static readonly DependencyProperty HeaderContentProperty =
        DependencyProperty.Register(nameof(HeaderContent), typeof(object), typeof(LatticePane), new PropertyMetadata(null));

    /// <summary>
    /// Событие, возникающее при нажатии на кнопку закрытия в шаблоне.
    /// </summary>
    public event RoutedEventHandler? CloseClick;

    public string Title
    {
        get => (string)GetValue(TitleProperty);
        set => SetValue(TitleProperty, value);
    }

    public object HeaderContent
    {
        get => GetValue(HeaderContentProperty);
        set => SetValue(HeaderContentProperty, value);
    }

    public LatticePane()
    {
        this.DefaultStyleKey = typeof(LatticePane);
    }

    protected override void OnApplyTemplate()
    {
        base.OnApplyTemplate();

        // Логика кнопки закрытия
        if (GetTemplateChild("PART_CloseButton") is Button closeButton)
        {
            closeButton.Click -= OnCloseButtonClick; // Защита от двойной подписки
            closeButton.Click += OnCloseButtonClick;
        }

        // Логика перетаскивания (Drag-and-Drop)
        if (GetTemplateChild("HeaderPresenter") is FrameworkElement header)
        {
            this.Loaded += (s, e) =>
            {
                var host = FindParentHost(this);
                if (host != null && this.DataContext is LayoutNode node)
                {
                    var handler = new DockTabHandler(host);
                    handler.Attach(header, node);
                }
            };
        }
    }

    private void OnCloseButtonClick(object sender, RoutedEventArgs e)
    {
        CloseClick?.Invoke(this, e);
    }

    private LatticeDockHost? FindParentHost(DependencyObject child)
    {
        var parent = Microsoft.UI.Xaml.Media.VisualTreeHelper.GetParent(child);
        if (parent == null) return null;

        if (parent is LatticeDockHost host) return host;
        return FindParentHost(parent);
    }
}