using System.Reflection;
using Avalonia.Controls;
using Avalonia.Threading;
using Shouldly;
using Xunit;
using AtomUIContextMenu = AtomUI.Desktop.Controls.ContextMenu;
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 ContextMenuPinnedOpenTests
{
    static ContextMenuPinnedOpenTests()
    {
        AvaloniaTestApp.EnsureInitialized();
    }

    [Fact]
    public void Popup_Pin_Opens_ContextMenu_And_Physical_Popup()
    {
        var contextMenu = new AtomUIContextMenu
        {
            IsMotionEnabled = false
        };
        contextMenu.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var host = new Border
        {
            Width       = 120,
            Height      = 40,
            ContextMenu = contextMenu
        };
        var window = ShowInWindow(host);

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

            var popup = GetPopup(contextMenu);
            contextMenu.IsOpen.ShouldBeTrue();
            popup.IsPopupPinnedOpen.ShouldBeTrue();
            popup.IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Pin_Rejects_ContextMenu_Close_Before_Submenu_Cleanup()
    {
        var parentItem = new AtomUIMenuItem { Header = "Parent" };
        parentItem.Items.Add(new AtomUIMenuItem { Header = "Child" });
        var contextMenu = new AtomUIContextMenu
        {
            IsMotionEnabled = false
        };
        contextMenu.Items.Add(parentItem);
        var host = new Border
        {
            Width       = 120,
            Height      = 40,
            ContextMenu = contextMenu
        };
        var window = ShowInWindow(host);

        try
        {
            contextMenu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            parentItem.IsSubMenuOpen = true;
            Dispatcher.UIThread.RunJobs();
            parentItem.IsSubMenuOpen.ShouldBeTrue();

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

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

    [Fact]
    public void Popup_Pin_Rejects_Window_Deactivation_Close()
    {
        var contextMenu = new AtomUIContextMenu
        {
            IsMotionEnabled = false
        };
        contextMenu.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var host = new Border
        {
            Width       = 120,
            Height      = 40,
            ContextMenu = contextMenu
        };
        var window = ShowInWindow(host);

        try
        {
            contextMenu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            contextMenu.IsOpen.ShouldBeTrue();

            RaiseWindowDeactivated(window);
            Dispatcher.UIThread.RunJobs();

            contextMenu.IsOpen.ShouldBeTrue();
            GetPopup(contextMenu).IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Popup_Unpin_Leaves_ContextMenu_Open_And_Restores_Normal_Close()
    {
        var contextMenu = new AtomUIContextMenu
        {
            IsMotionEnabled = false
        };
        contextMenu.Items.Add(new AtomUIMenuItem { Header = "Open" });
        var host = new Border
        {
            Width       = 120,
            Height      = 40,
            ContextMenu = contextMenu
        };
        var window = ShowInWindow(host);

        try
        {
            contextMenu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            var popup = GetPopup(contextMenu);

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

            contextMenu.IsOpen.ShouldBeTrue();
            popup.IsPopupPinnedOpen.ShouldBeFalse();
            popup.IsOpen.ShouldBeTrue();

            contextMenu.Close();
            Dispatcher.UIThread.RunJobs();
            contextMenu.IsOpen.ShouldBeFalse();
            popup.IsOpen.ShouldBeFalse();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    [Fact]
    public void Replacing_A_Pinned_ContextMenu_Closes_The_Old_Owner_Session()
    {
        var oldContextMenu = new AtomUIContextMenu
        {
            IsMotionEnabled = false
        };
        oldContextMenu.Items.Add(new AtomUIMenuItem { Header = "Old" });
        var replacement = new AtomUIContextMenu
        {
            IsMotionEnabled = false
        };
        replacement.Items.Add(new AtomUIMenuItem { Header = "New" });
        var host = new Border
        {
            Width       = 120,
            Height      = 40,
            ContextMenu = oldContextMenu
        };
        var window = ShowInWindow(host);

        try
        {
            oldContextMenu.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            var oldPopup = GetPopup(oldContextMenu);
            oldPopup.IsOpen.ShouldBeTrue();

            host.ContextMenu = replacement;
            Dispatcher.UIThread.RunJobs();

            oldContextMenu.IsOpen.ShouldBeFalse();
            oldPopup.IsOpen.ShouldBeFalse();

            replacement.IsPopupPinnedOpen = true;
            Dispatcher.UIThread.RunJobs();
            replacement.IsOpen.ShouldBeTrue();
            GetPopup(replacement).IsOpen.ShouldBeTrue();
        }
        finally
        {
            window.Close();
            Dispatcher.UIThread.RunJobs();
        }
    }

    private static AtomUIPopup GetPopup(AtomUIContextMenu contextMenu)
    {
        var field = typeof(AtomUIContextMenu).GetField("_popup", BindingFlags.Instance | BindingFlags.NonPublic);
        field.ShouldNotBeNull();
        return field.GetValue(contextMenu).ShouldBeOfType<AtomUIPopup>();
    }

    private static AtomUIWindow ShowInWindow(Control content)
    {
        var window = new AtomUIWindow
        {
            Width   = 320,
            Height  = 200,
            Content = content
        };
        window.Show();
        Dispatcher.UIThread.RunJobs();
        return window;
    }

    private static void RaiseWindowDeactivated(AtomUIWindow window)
    {
        var method = typeof(WindowBase).GetMethod(
            "HandleDeactivated",
            BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
        method.ShouldNotBeNull();
        method.Invoke(window, null);
    }
}