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

using Avalonia.Headless.NUnit;

using AwesomeAssertions;

using ILSpy;
using ILSpy.AppEnv;
using ILSpy.Views;

using NUnit.Framework;

namespace ICSharpCode.ILSpy.Tests;

/// <summary>
/// Selecting a list in Manage Assembly Lists (the Select button and the double-click shortcut both
/// call the same activation path) must switch the LIVE active list, not merely persist it for the
/// next launch — i.e. it must drive AssemblyTreeModel.ActiveListName, which reloads the tree.
/// </summary>
[TestFixture]
public class ManageAssemblyListsSelectTests
{
	[AvaloniaTest]
	public async Task Selecting_A_List_Switches_The_Live_Active_List()
	{
		var (_, vm) = await TestHarness.BootAsync();
		var settingsService = AppComposition.Current.GetExport<SettingsService>();
		var manager = settingsService.AssemblyListManager;

		var current = vm.AssemblyTreeModel.ActiveListName;

		// Ensure there is a second, empty list to switch to (the headless fixture seeds one).
		var other = "Switch Target " + System.Guid.NewGuid().ToString("N");
		manager.AddListIfNotExists(manager.CreateList(other));
		other.Should().NotBe(current);

		var dialog = new ManageAssemblyListsDialog(settingsService);
		dialog.ListsControl.SelectedItem = other;
		dialog.ActivateSelectedList();

		vm.AssemblyTreeModel.ActiveListName.Should().Be(other,
			"selecting a list must switch the live active list (via AssemblyTreeModel.ActiveListName), not just the persisted setting");
		settingsService.SessionSettings.ActiveAssemblyList.Should().Be(other,
			"and the choice is persisted as a side effect of the model switch");
	}
}