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using System.Linq;
using System.Threading.Tasks;

using Avalonia.Headless.NUnit;
using Avalonia.Threading;
using Avalonia.VisualTree;

using ICSharpCode.ILSpy.AppEnv;
using ICSharpCode.ILSpy.Controls.Omnibar;
using ICSharpCode.ILSpy.TextView;
using ICSharpCode.ILSpy.TreeNodes;

using NUnit.Framework;

namespace ICSharpCode.ILSpy.Tests.Controls;

/// <summary>
/// The omnibar ships off by default behind the Options / Display "Tab options"
/// <c>EnableOmnibar</c> toggle, and the toggle takes effect live (no re-decompile).
/// </summary>
[TestFixture]
public class OmnibarSettingTests
{
	[AvaloniaTest]
	public async Task Omnibar_Is_Off_By_Default_And_Revealed_Live_When_Enabled()
	{
		var (window, vm) = await TestHarness.BootAsync(3);
		var display = AppComposition.Current.GetExport<SettingsService>().DisplaySettings;
		Assert.That(display.EnableOmnibar, Is.False, "the omnibar is off by default");

		// Realize a decompiler document by selecting a node.
		var typeNode = vm.AssemblyTreeModel.FindNode<TypeTreeNode>(
			"System.Linq", "System.Linq", "System.Linq.Enumerable");
		vm.AssemblyTreeModel.SelectedItem = typeNode;
		Omnibar? omnibar = null;
		await Waiters.WaitForAsync(() => (omnibar = window.GetVisualDescendants().OfType<DecompilerTextView>()
				.Where(v => v.IsEffectivelyVisible)
				.SelectMany(v => v.GetVisualDescendants().OfType<Omnibar>())
				.FirstOrDefault()) != null,
			description: "a visible decompiler text view hosting the omnibar");
		Assert.That(omnibar, Is.Not.Null, "selecting a node realizes a decompiler text view hosting the omnibar");

		Assert.That(omnibar!.IsVisible, Is.False,
			"the omnibar is hidden while the EnableOmnibar setting is off");

		display.EnableOmnibar = true;
		Dispatcher.UIThread.RunJobs();

		Assert.That(omnibar.IsVisible, Is.True,
			"enabling the setting reveals the omnibar without a re-decompile");
	}
}