using AtomUI.Controls.Primitives;
using Avalonia.Controls;
using Avalonia.Controls.Primitives;
using Avalonia.Threading;
using Avalonia.VisualTree;
using Shouldly;
using Xunit;
using AtomUIMenu = AtomUI.Desktop.Controls.Menu;
using AtomUIMenuItem = AtomUI.Desktop.Controls.MenuItem;
using AtomUIPopup = AtomUI.Desktop.Controls.Popup;
using AtomUIWindow = AtomUI.Desktop.Controls.Window;

namespace AtomUI.Desktop.Controls.Tests.Menu;

public class MenuPinnedOpenTests
{
    static MenuPinnedOpenTests()
    {
        AvaloniaTestApp.EnsureInitialized();
    }

    [Fact]
    public void Popup_Pin_Opens_Menu_Active_Submenu_And_Physical_Popup()
    {
        var parentItem = new AtomUIMenuItem { Header = "File" };
        parentItem.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var menu = new AtomUIMenu
        {
            IsMotionEnabled = false,
            Width           = 320
        };
        menu.Items.Add(parentItem);
        var window = ShowInWindow(menu);

        try
        {
            menu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();

            var popup = FindPopup(parentItem);
            menu.IsOpen.ShouldBeTrue();
            parentItem.IsSubMenuOpen.ShouldBeTrue();
            popup.IsPopupPinnedOpen.ShouldBeTrue();
            popup.IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Pin_Rejects_Menu_Close_Requests()
    {
        var parentItem = new AtomUIMenuItem { Header = "File" };
        parentItem.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var menu = new AtomUIMenu
        {
            IsMotionEnabled = false,
            Width           = 320
        };
        menu.Items.Add(parentItem);
        var window = ShowInWindow(menu);

        try
        {
            menu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            var popup = FindPopup(parentItem);

            menu.Close();
            Dispatcher.UIThread.RunJobs();

            menu.IsOpen.ShouldBeTrue();
            parentItem.IsSubMenuOpen.ShouldBeTrue();
            popup.IsOpen.ShouldBeTrue();

            menu.CloseImmediately();
            Dispatcher.UIThread.RunJobs();

            menu.IsOpen.ShouldBeTrue();
            parentItem.IsSubMenuOpen.ShouldBeTrue();
            popup.IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Pin_Rejects_Active_Submenu_Collapse()
    {
        var parentItem = new AtomUIMenuItem { Header = "File" };
        parentItem.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var menu = new AtomUIMenu
        {
            IsMotionEnabled = false,
            Width           = 320
        };
        menu.Items.Add(parentItem);
        var window = ShowInWindow(menu);

        try
        {
            menu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();

            parentItem.SetCurrentValue(MenuItem.IsSubMenuOpenProperty, false);
            Dispatcher.UIThread.RunJobs();

            parentItem.IsSubMenuOpen.ShouldBeTrue();
            FindPopup(parentItem).IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Pin_Closes_For_Detach_And_Reopens_After_Reattach()
    {
        var parentItem = new AtomUIMenuItem { Header = "File" };
        parentItem.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var menu = new AtomUIMenu
        {
            IsMotionEnabled = false,
            Width           = 320
        };
        menu.Items.Add(parentItem);
        var window = ShowInWindow(menu);

        try
        {
            menu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            var popup = FindPopup(parentItem);
            var windowContent = window.Content;

            window.Content = null;
            Dispatcher.UIThread.RunJobs();

            menu.IsOpen.ShouldBeFalse();
            parentItem.IsSubMenuOpen.ShouldBeFalse();
            parentItem.IsPopupPinnedOpen.ShouldBeFalse();
            popup.IsPopupPinnedOpen.ShouldBeFalse();
            popup.IsOpen.ShouldBeFalse();

            window.Content = windowContent;
            Dispatcher.UIThread.RunJobs();

            menu.IsOpen.ShouldBeTrue();
            parentItem.IsSubMenuOpen.ShouldBeTrue();
            popup.IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Unpin_Leaves_Menu_Open_And_Restores_Normal_Close()
    {
        var parentItem = new AtomUIMenuItem { Header = "File" };
        parentItem.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var menu = new AtomUIMenu
        {
            IsMotionEnabled = false,
            Width           = 320
        };
        menu.Items.Add(parentItem);
        var window = ShowInWindow(menu);

        try
        {
            menu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            var popup = FindPopup(parentItem);

            menu.IsPopupPinnedOpen = false;
            Dispatcher.UIThread.RunJobs();

            menu.IsOpen.ShouldBeTrue();
            parentItem.IsSubMenuOpen.ShouldBeTrue();
            parentItem.IsPopupPinnedOpen.ShouldBeFalse();
            popup.IsPopupPinnedOpen.ShouldBeFalse();
            popup.IsOpen.ShouldBeTrue();

            menu.Close();
            Dispatcher.UIThread.RunJobs();

            menu.IsOpen.ShouldBeFalse();
            parentItem.IsSubMenuOpen.ShouldBeFalse();
            popup.IsOpen.ShouldBeFalse();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Pin_Releases_Removed_Item_And_Transfers_To_The_Next_Submenu()
    {
        var firstItem = new AtomUIMenuItem { Header = "File" };
        firstItem.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var secondItem = new AtomUIMenuItem { Header = "Edit" };
        secondItem.Items.Add(new AtomUIMenuItem { Header = "Copy" });
        var menu = new AtomUIMenu
        {
            IsMotionEnabled = false,
            Width           = 320
        };
        menu.Items.Add(firstItem);
        menu.Items.Add(secondItem);
        var window = ShowInWindow(menu);

        try
        {
            menu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            var firstPopup = FindPopup(firstItem);
            firstPopup.IsOpen.ShouldBeTrue();

            menu.Items.Remove(firstItem);
            Dispatcher.UIThread.RunJobs();
            window.UpdateLayout();

            firstItem.IsPopupPinnedOpen.ShouldBeFalse();
            firstItem.IsSubMenuOpen.ShouldBeFalse();
            firstPopup.IsPopupPinnedOpen.ShouldBeFalse();
            firstPopup.IsOpen.ShouldBeFalse();
            secondItem.IsPopupPinnedOpen.ShouldBeTrue();
            secondItem.IsSubMenuOpen.ShouldBeTrue();
            FindPopup(secondItem).IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    private static AtomUIPopup FindPopup(Control root)
    {
        return root.GetVisualDescendants()
                   .OfType<AtomUIPopup>()
                   .Single(item => item.Name == "PART_Popup");
    }

    private static AtomUIWindow ShowInWindow(Control content)
    {
        var overlayPanel = new ScopeAwareOverlayLayerPanel
        {
            Width  = 420,
            Height = 240
        };
        overlayPanel.Children.Add(content);
        var visualLayerManager = new VisualLayerManager
        {
            Child = overlayPanel
        };
        var window = new AtomUIWindow
        {
            Width   = 420,
            Height  = 240,
            Content = visualLayerManager
        };
        window.Show();
        Dispatcher.UIThread.RunJobs();
        return window;
    }
}