using GFramework.SourceGenerators.Architectures;
using GFramework.SourceGenerators.Tests.Core;

namespace GFramework.SourceGenerators.Tests.Architectures;

[TestFixture]
public class AutoRegisterModuleGeneratorTests
{
    /// <summary>
    ///     验证同一声明上的注册特性会按照源码中的书写顺序生成安装代码。
    /// </summary>
    [Test]
    public async Task Generates_Module_Install_Method_In_Attribute_Order()
    {
        const string source = """
                              using System;
                              using GFramework.SourceGenerators.Abstractions.Architectures;

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

                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                  public sealed class RegisterModelAttribute : Attribute
                                  {
                                      public RegisterModelAttribute(Type modelType) { }
                                  }

                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                  public sealed class RegisterSystemAttribute : Attribute
                                  {
                                      public RegisterSystemAttribute(Type systemType) { }
                                  }

                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                  public sealed class RegisterUtilityAttribute : Attribute
                                  {
                                      public RegisterUtilityAttribute(Type utilityType) { }
                                  }
                              }

                              namespace GFramework.Core.Abstractions.Architectures
                              {
                                  public interface IArchitecture
                                  {
                                      T RegisterModel<T>(T model) where T : GFramework.Core.Abstractions.Model.IModel;
                                      T RegisterSystem<T>(T system) where T : GFramework.Core.Abstractions.Systems.ISystem;
                                      T RegisterUtility<T>(T utility) where T : GFramework.Core.Abstractions.Utility.IUtility;
                                  }
                              }

                              namespace GFramework.Core.Abstractions.Model
                              {
                                  public interface IModel { }
                              }

                              namespace GFramework.Core.Abstractions.Systems
                              {
                                  public interface ISystem { }
                              }

                              namespace GFramework.Core.Abstractions.Utility
                              {
                                  public interface IUtility { }
                              }

                              namespace TestApp
                              {
                                  using GFramework.Core.Abstractions.Model;
                                  using GFramework.Core.Abstractions.Systems;
                                  using GFramework.Core.Abstractions.Utility;
                                  using GFramework.SourceGenerators.Abstractions.Architectures;

                                  public sealed class PlayerModel : IModel { }
                                  public sealed class CombatSystem : ISystem { }
                                  public sealed class AudioUtility : IUtility { }

                                  [AutoRegisterModule]
                                  [RegisterSystem(typeof(CombatSystem))]
                                  [RegisterModel(typeof(PlayerModel))]
                                  [RegisterUtility(typeof(AudioUtility))]
                                  public partial class GameplayModule
                                  {
                                  }
                              }
                              """;

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

                                namespace TestApp;

                                partial class GameplayModule
                                {
                                    public void Install(global::GFramework.Core.Abstractions.Architectures.IArchitecture architecture)
                                    {
                                        architecture.RegisterSystem(new global::TestApp.CombatSystem());
                                        architecture.RegisterModel(new global::TestApp.PlayerModel());
                                        architecture.RegisterUtility(new global::TestApp.AudioUtility());
                                    }
                                }

                                """;

        await GeneratorTest<AutoRegisterModuleGenerator>.RunAsync(
            source,
            ("TestApp_GameplayModule.AutoRegisterModule.g.cs", expected));
    }

    /// <summary>
    ///     验证 partial 声明分布在多个文件时，生成器仍然会使用稳定的跨文件顺序生成注册代码。
    /// </summary>
    [Test]
    public async Task Generates_Module_Install_Method_In_Deterministic_Order_Across_Partial_Declarations()
    {
        const string commonSource = """
                                    using System;

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

                                        [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                        public sealed class RegisterModelAttribute : Attribute
                                        {
                                            public RegisterModelAttribute(Type modelType) { }
                                        }

                                        [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                        public sealed class RegisterSystemAttribute : Attribute
                                        {
                                            public RegisterSystemAttribute(Type systemType) { }
                                        }

                                        [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                        public sealed class RegisterUtilityAttribute : Attribute
                                        {
                                            public RegisterUtilityAttribute(Type utilityType) { }
                                        }
                                    }

                                    namespace GFramework.Core.Abstractions.Architectures
                                    {
                                        public interface IArchitecture
                                        {
                                            T RegisterModel<T>(T model) where T : GFramework.Core.Abstractions.Model.IModel;
                                            T RegisterSystem<T>(T system) where T : GFramework.Core.Abstractions.Systems.ISystem;
                                            T RegisterUtility<T>(T utility) where T : GFramework.Core.Abstractions.Utility.IUtility;
                                        }
                                    }

                                    namespace GFramework.Core.Abstractions.Model
                                    {
                                        public interface IModel { }
                                    }

                                    namespace GFramework.Core.Abstractions.Systems
                                    {
                                        public interface ISystem { }
                                    }

                                    namespace GFramework.Core.Abstractions.Utility
                                    {
                                        public interface IUtility { }
                                    }

                                    namespace TestApp
                                    {
                                        using GFramework.Core.Abstractions.Model;
                                        using GFramework.Core.Abstractions.Systems;
                                        using GFramework.Core.Abstractions.Utility;

                                        public sealed class PlayerModel : IModel { }
                                        public sealed class CombatSystem : ISystem { }
                                        public sealed class AudioUtility : IUtility { }
                                    }
                                    """;

        const string partASource = """
                                    namespace TestApp
                                    {
                                        using GFramework.SourceGenerators.Abstractions.Architectures;

                                        // Padding ensures this attribute lives later in the file than the attributes in PartB.
                                        // The generator should still place it first because PartA sorts before PartB.
                                        // padding 01
                                        // padding 02
                                        // padding 03
                                        // padding 04
                                        // padding 05
                                        // padding 06
                                        // padding 07
                                        // padding 08
                                        // padding 09
                                        // padding 10
                                        [AutoRegisterModule]
                                        [RegisterUtility(typeof(AudioUtility))]
                                        public partial class GameplayModule
                                        {
                                        }
                                    }
                                    """;

        const string partBSource = """
                                    namespace TestApp
                                    {
                                        using GFramework.SourceGenerators.Abstractions.Architectures;

                                        [RegisterSystem(typeof(CombatSystem))]
                                        [RegisterModel(typeof(PlayerModel))]
                                        public partial class GameplayModule
                                        {
                                        }
                                    }
                                    """;

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

                                namespace TestApp;

                                partial class GameplayModule
                                {
                                    public void Install(global::GFramework.Core.Abstractions.Architectures.IArchitecture architecture)
                                    {
                                        architecture.RegisterUtility(new global::TestApp.AudioUtility());
                                        architecture.RegisterSystem(new global::TestApp.CombatSystem());
                                        architecture.RegisterModel(new global::TestApp.PlayerModel());
                                    }
                                }

                                """;

        var test = new CSharpSourceGeneratorTest<AutoRegisterModuleGenerator, DefaultVerifier>
        {
            TestState =
            {
                Sources =
                {
                    ("Common.cs", commonSource),
                    ("GameplayModule.PartA.cs", partASource),
                    ("GameplayModule.PartB.cs", partBSource)
                },
                GeneratedSources =
                {
                    (typeof(AutoRegisterModuleGenerator), "TestApp_GameplayModule.AutoRegisterModule.g.cs", NormalizeLineEndings(expected))
                }
            },
            DisabledDiagnostics = { "GF_Common_Trace_001" }
        };

        await test.RunAsync();
    }

    /// <summary>
    ///     验证生成器会保留可空引用、notnull 与 unmanaged 约束。
    /// </summary>
    [Test]
    public async Task Generates_Type_Constraints_For_NullableReference_NotNull_And_Unmanaged()
    {
        const string source = """
                              #nullable enable
                              using System;
                              using GFramework.SourceGenerators.Abstractions.Architectures;

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

                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                  public sealed class RegisterModelAttribute : Attribute
                                  {
                                      public RegisterModelAttribute(Type modelType) { }
                                  }

                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                  public sealed class RegisterSystemAttribute : Attribute
                                  {
                                      public RegisterSystemAttribute(Type systemType) { }
                                  }

                                  [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
                                  public sealed class RegisterUtilityAttribute : Attribute
                                  {
                                      public RegisterUtilityAttribute(Type utilityType) { }
                                  }
                              }

                              namespace GFramework.Core.Abstractions.Architectures
                              {
                                  public interface IArchitecture
                                  {
                                      T RegisterModel<T>(T model) where T : GFramework.Core.Abstractions.Model.IModel;
                                      T RegisterSystem<T>(T system) where T : GFramework.Core.Abstractions.Systems.ISystem;
                                      T RegisterUtility<T>(T utility) where T : GFramework.Core.Abstractions.Utility.IUtility;
                                  }
                              }

                              namespace GFramework.Core.Abstractions.Model
                              {
                                  public interface IModel { }
                              }

                              namespace GFramework.Core.Abstractions.Systems
                              {
                                  public interface ISystem { }
                              }

                              namespace GFramework.Core.Abstractions.Utility
                              {
                                  public interface IUtility { }
                              }

                              namespace TestApp
                              {
                                  using GFramework.Core.Abstractions.Model;
                                  using GFramework.SourceGenerators.Abstractions.Architectures;

                                  public sealed class PlayerModel : IModel { }

                                  [AutoRegisterModule]
                                  [RegisterModel(typeof(PlayerModel))]
                                  public partial class GameplayModule<TNullableRef, TNotNull, TUnmanaged>
                                      where TNullableRef : class?
                                      where TNotNull : notnull
                                      where TUnmanaged : unmanaged
                                  {
                                  }
                              }
                              """;

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

                                namespace TestApp;

                                partial class GameplayModule<TNullableRef, TNotNull, TUnmanaged>
                                    where TNullableRef : class?
                                    where TNotNull : notnull
                                    where TUnmanaged : unmanaged
                                {
                                    public void Install(global::GFramework.Core.Abstractions.Architectures.IArchitecture architecture)
                                    {
                                        architecture.RegisterModel(new global::TestApp.PlayerModel());
                                    }
                                }

                                """;

        await GeneratorTest<AutoRegisterModuleGenerator>.RunAsync(
            source,
            ("TestApp_GameplayModule.AutoRegisterModule.g.cs", expected));
    }

    /// <summary>
    ///     将测试快照统一为当前平台换行符，避免不同系统上的源生成输出比较出现伪差异。
    /// </summary>
    /// <param name="content">原始快照内容。</param>
    /// <returns>使用当前平台换行符的快照内容。</returns>
    private static string NormalizeLineEndings(string content)
    {
        return content
            .Replace("\r\n", "\n", StringComparison.Ordinal)
            .Replace("\r", "\n", StringComparison.Ordinal)
            .Replace("\n", Environment.NewLine, StringComparison.Ordinal);
    }
}