using GFramework.Godot.SourceGenerators.Behavior;
using GFramework.Godot.SourceGenerators.Tests.Core;

namespace GFramework.Godot.SourceGenerators.Tests.Behavior;

[TestFixture]
public class AutoUiPageGeneratorTests
{
    [Test]
    public async Task Generates_Ui_Page_Behavior_Boilerplate()
    {
        const string source = """
                              using System;
                              using GFramework.Godot.SourceGenerators.Abstractions;
                              using Godot;

                              namespace GFramework.Godot.SourceGenerators.Abstractions
                              {
                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
                                  public sealed class AutoUiPageAttribute : Attribute
                                  {
                                      public AutoUiPageAttribute(string key, string layerName) { }
                                  }
                              }

                              namespace Godot
                              {
                                  public class Node { }
                                  public class CanvasItem : Node { }
                                  public class Control : CanvasItem { }
                              }

                              namespace GFramework.Game.Abstractions.Enums
                              {
                                  public enum UiLayer
                                  {
                                      Page,
                                      Overlay,
                                      Modal
                                  }
                              }

                              namespace GFramework.Game.Abstractions.UI
                              {
                                  public interface IUiPageBehavior { }
                              }

                              namespace GFramework.Godot.UI
                              {
                                  using GFramework.Game.Abstractions.Enums;
                                  using GFramework.Game.Abstractions.UI;
                                  using Godot;

                                  public static class UiPageBehaviorFactory
                                  {
                                      public static IUiPageBehavior Create<T>(T owner, string key, UiLayer layer)
                                          where T : CanvasItem
                                      {
                                          return null!;
                                      }
                                  }
                              }

                              namespace TestApp
                              {
                                  [AutoUiPage("MainMenu", "Page")]
                                  public partial class MainMenu : Control
                                  {
                                  }
                              }
                              """;

        const string expected = """
                                // <auto-generated />
                                #nullable enable

                                namespace TestApp;

                                partial class MainMenu
                                {
                                    private global::GFramework.Game.Abstractions.UI.IUiPageBehavior? __autoUiPageBehavior_Generated;

                                    public static string UiKeyStr => "MainMenu";

                                    public global::GFramework.Game.Abstractions.UI.IUiPageBehavior GetPage()
                                    {
                                        return __autoUiPageBehavior_Generated ??= global::GFramework.Godot.UI.UiPageBehaviorFactory.Create(this, UiKeyStr, global::GFramework.Game.Abstractions.Enums.UiLayer.Page);
                                    }
                                }

                                """;

        await GeneratorTest<AutoUiPageGenerator>.RunAsync(
            source,
            ("TestApp_MainMenu.AutoUiPage.g.cs", expected));
    }

    [Test]
    public async Task Reports_Diagnostic_When_AutoUiPage_Attribute_Arguments_Are_Invalid()
    {
        const string source = """
                              using System;
                              using GFramework.Godot.SourceGenerators.Abstractions;
                              using Godot;

                              namespace GFramework.Godot.SourceGenerators.Abstractions
                              {
                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
                                  public sealed class AutoUiPageAttribute : Attribute
                                  {
                                      public AutoUiPageAttribute(string key) { }
                                  }
                              }

                              namespace Godot
                              {
                                  public class Node { }
                                  public class CanvasItem : Node { }
                                  public class Control : CanvasItem { }
                              }

                              namespace GFramework.Game.Abstractions.Enums
                              {
                                  public enum UiLayer
                                  {
                                      Page
                                  }
                              }

                              namespace GFramework.Game.Abstractions.UI
                              {
                                  public interface IUiPageBehavior { }
                              }

                              namespace GFramework.Godot.UI
                              {
                                  using GFramework.Game.Abstractions.Enums;
                                  using GFramework.Game.Abstractions.UI;
                                  using Godot;

                                  public static class UiPageBehaviorFactory
                                  {
                                      public static IUiPageBehavior Create<T>(T owner, string key, UiLayer layer)
                                          where T : CanvasItem
                                      {
                                          return null!;
                                      }
                                  }
                              }

                              namespace TestApp
                              {
                                  [{|#0:AutoUiPage("MainMenu")|}]
                                  public partial class MainMenu : Control
                                  {
                                  }
                              }
                              """;

        var test = new CSharpSourceGeneratorTest<AutoUiPageGenerator, DefaultVerifier>
        {
            TestState =
            {
                Sources = { source }
            },
            DisabledDiagnostics = { "GF_Common_Trace_001" },
            TestBehaviors = TestBehaviors.SkipGeneratedSourcesCheck
        };

        test.ExpectedDiagnostics.Add(new DiagnosticResult("GF_AutoBehavior_004", DiagnosticSeverity.Error)
            .WithLocation(0)
            .WithArguments(
                "AutoUiPageAttribute",
                "MainMenu",
                "a string key argument and a string UiLayer name argument"));

        await test.RunAsync();
    }

    [Test]
    public async Task Generates_Type_Constraints_For_ClassNullable_NotNull_And_Unmanaged()
    {
        const string source = """
                              #nullable enable
                              using System;
                              using GFramework.Godot.SourceGenerators.Abstractions;
                              using Godot;

                              namespace GFramework.Godot.SourceGenerators.Abstractions
                              {
                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
                                  public sealed class AutoUiPageAttribute : Attribute
                                  {
                                      public AutoUiPageAttribute(string key, string layerName) { }
                                  }
                              }

                              namespace Godot
                              {
                                  public class Node { }
                                  public class CanvasItem : Node { }
                                  public class Control : CanvasItem { }
                              }

                              namespace GFramework.Game.Abstractions.Enums
                              {
                                  public enum UiLayer
                                  {
                                      Page
                                  }
                              }

                              namespace GFramework.Game.Abstractions.UI
                              {
                                  public interface IUiPageBehavior { }
                              }

                              namespace GFramework.Godot.UI
                              {
                                  using GFramework.Game.Abstractions.Enums;
                                  using GFramework.Game.Abstractions.UI;
                                  using Godot;

                                  public static class UiPageBehaviorFactory
                                  {
                                      public static IUiPageBehavior Create<T>(T owner, string key, UiLayer layer)
                                          where T : CanvasItem
                                      {
                                          return null!;
                                      }
                                  }
                              }

                              namespace TestApp
                              {
                                  [AutoUiPage("MainMenu", "Page")]
                                  public partial class MainMenu<TReference, TNotNull, TUnmanaged> : Control
                                      where TReference : class?
                                      where TNotNull : notnull
                                      where TUnmanaged : unmanaged
                                  {
                                  }
                              }
                              """;

        const string expected = """
                                // <auto-generated />
                                #nullable enable

                                namespace TestApp;

                                partial class MainMenu<TReference, TNotNull, TUnmanaged>
                                    where TReference : class?
                                    where TNotNull : notnull
                                    where TUnmanaged : unmanaged
                                {
                                    private global::GFramework.Game.Abstractions.UI.IUiPageBehavior? __autoUiPageBehavior_Generated;

                                    public static string UiKeyStr => "MainMenu";

                                    public global::GFramework.Game.Abstractions.UI.IUiPageBehavior GetPage()
                                    {
                                        return __autoUiPageBehavior_Generated ??= global::GFramework.Godot.UI.UiPageBehaviorFactory.Create(this, UiKeyStr, global::GFramework.Game.Abstractions.Enums.UiLayer.Page);
                                    }
                                }

                                """;

        await GeneratorTest<AutoUiPageGenerator>.RunAsync(
            source,
            ("TestApp_MainMenu.AutoUiPage.g.cs", expected));
    }
}