// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Recommendations;
 
[Trait(Traits.Feature, Traits.Features.KeywordRecommending)]
public sealed class ImplicitKeywordRecommenderTests : KeywordRecommenderTests
{
    [Fact]
    public async Task TestNotAtRoot_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$");
    }
 
    [Fact]
    public async Task TestNotAfterClass_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            class C { }
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalStatement_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            System.Console.WriteLine();
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalVariableDeclaration_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            int i = 0;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotInUsingAlias()
    {
        await VerifyAbsenceAsync(
@"using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInGlobalUsingAlias()
    {
        await VerifyAbsenceAsync(
@"global using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInEmptyStatement()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"$$"));
    }
 
    [Fact]
    public async Task TestNotInCompilationUnit()
        => await VerifyAbsenceAsync(@"$$");
 
    [Fact]
    public async Task TestNotAfterExtern()
    {
        await VerifyAbsenceAsync("""
            extern alias Goo;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterUsing()
    {
        await VerifyAbsenceAsync("""
            using Goo;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalUsing()
    {
        await VerifyAbsenceAsync("""
            global using Goo;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNamespace()
    {
        await VerifyAbsenceAsync("""
            namespace N {}
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterTypeDeclaration()
    {
        await VerifyAbsenceAsync("""
            class C {}
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterDelegateDeclaration()
    {
        await VerifyAbsenceAsync("""
            delegate void Goo();
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterMethod()
    {
        await VerifyAbsenceAsync("""
            class C {
              void Goo() {}
              $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterMethodInPartialType()
    {
        await VerifyAbsenceAsync(
            """
            partial class C {
              void Goo() {}
              $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterFieldInPartialClass()
    {
        await VerifyAbsenceAsync(
            """
            partial class C {
              int i;
              $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterPropertyInPartialClass()
    {
        await VerifyAbsenceAsync(
            """
            partial class C {
              int i { get; }
              $$
            """);
    }
 
    [Fact]
    public async Task TestNotBeforeUsing()
    {
        await VerifyAbsenceAsync(
            """
            $$
            using Goo;
            """);
    }
 
    [Fact]
    public async Task TestNotBeforeGlobalUsing()
    {
        await VerifyAbsenceAsync(
            """
            $$
            global using Goo;
            """);
    }
 
    [Fact]
    public async Task TestNotAfterAssemblyAttribute()
    {
        await VerifyAbsenceAsync("""
            [assembly: goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterRootAttribute()
    {
        await VerifyAbsenceAsync("""
            [goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedAttributeInPartialClass()
    {
        await VerifyAbsenceAsync(
            """
            partial class C {
              [goo]
              $$
            """);
    }
 
    // This will be fixed once we have accessibility for members
    [Fact]
    public async Task TestNotInsideStruct()
    {
        await VerifyAbsenceAsync("""
            struct S {
               $$
            """);
    }
 
    // This will be fixed once we have accessibility for members
    [Fact]
    public async Task TestNotInsidePartialStruct()
    {
        await VerifyAbsenceAsync(
            """
            partial struct S {
               $$
            """);
    }
 
    [Fact]
    public async Task TestNotInsideInterface()
    {
        await VerifyAbsenceAsync("""
            interface I {
               $$
            """);
    }
 
    [Fact]
    public async Task TestNotInsidePartialClass()
    {
        await VerifyAbsenceAsync(
            """
            partial class C {
               $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterPartial()
        => await VerifyAbsenceAsync(@"partial $$");
 
    [Fact]
    public async Task TestNotAfterAbstract()
        => await VerifyAbsenceAsync(@"abstract $$");
 
    [Fact]
    public async Task TestNotAfterInternal()
        => await VerifyAbsenceAsync(@"internal $$");
 
    [Fact]
    public async Task TestNotAfterPublic()
        => await VerifyAbsenceAsync(@"public $$");
 
    [Fact]
    public async Task TestNotAfterStaticPublic()
        => await VerifyAbsenceAsync(@"static public $$");
 
    [Fact]
    public async Task TestAfterNestedStaticPublicInClass()
    {
        await VerifyKeywordAsync(
            """
            class C {
                static public $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedStaticPublicInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface C {
                static public $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedAbstractPublicInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface C {
                abstract public $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedStaticAbstractPublicInInterface()
    {
        await VerifyKeywordAsync(
            """
            interface C {
                static abstract public $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedAbstractStaticPublicInInterface()
    {
        await VerifyKeywordAsync(
            """
            interface C {
                abstract static public $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedStaticAbstractInInterface()
    {
        await VerifyKeywordAsync(
            """
            interface C {
                static abstract $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedAbstractStaticInInterface()
    {
        await VerifyKeywordAsync(
            """
            interface C {
                abstract static $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedStaticInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface C {
                static $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterPublicStatic()
        => await VerifyAbsenceAsync(@"public static $$");
 
    [Fact]
    public async Task TestAfterNestedPublicStaticInClass()
    {
        await VerifyKeywordAsync(
            """
            class C {
                public static $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedPublicStaticInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface C {
                public static $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedPublicAbstractInInterface()
    {
        await VerifyAbsenceAsync(
            """
            interface C {
                public abstract $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedPublicStaticAbstractInInterface()
    {
        await VerifyKeywordAsync(
            """
            interface C {
                public static abstract $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedPublicAbstractStaticInInterface()
    {
        await VerifyKeywordAsync(
            """
            interface C {
                public abstract static $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterInvalidPublic()
        => await VerifyAbsenceAsync(@"virtual public $$");
 
    [Fact]
    public async Task TestNotAfterPrivate()
        => await VerifyAbsenceAsync(@"private $$");
 
    [Fact]
    public async Task TestNotAfterProtected()
        => await VerifyAbsenceAsync(@"protected $$");
 
    [Fact]
    public async Task TestNotAfterSealed()
        => await VerifyAbsenceAsync(@"sealed $$");
 
    [Fact]
    public async Task TestNotAfterStatic()
        => await VerifyAbsenceAsync(@"static $$");
 
    [Fact]
    public async Task TestNotAfterClass()
        => await VerifyAbsenceAsync(@"class $$");
 
    [Fact]
    public async Task TestNotAfterDelegate()
        => await VerifyAbsenceAsync(@"delegate $$");
 
    [Fact]
    public async Task TestNotBetweenUsings()
    {
        await VerifyAbsenceAsync(
            """
            using Goo;
            $$
            using Bar;
            """);
    }
 
    [Fact]
    public async Task TestNotBetweenGlobalUsings_01()
    {
        await VerifyAbsenceAsync(
            """
            global using Goo;
            $$
            using Bar;
            """);
    }
 
    [Fact]
    public async Task TestNotBetweenGlobalUsings_02()
    {
        await VerifyAbsenceAsync(
            """
            global using Goo;
            $$
            global using Bar;
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedAbstractInClass()
    {
        await VerifyAbsenceAsync("""
            class C {
                abstract $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedVirtualInClass()
    {
        await VerifyAbsenceAsync("""
            class C {
                virtual $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedOverrideInClass()
    {
        await VerifyAbsenceAsync("""
            class C {
                override $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedSealedInClass()
    {
        await VerifyAbsenceAsync("""
            class C {
                sealed $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedReadOnlyInClass()
    {
        await VerifyAbsenceAsync("""
            class C {
                readonly $$
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544103")]
    public async Task TestAfterNestedUnsafeStaticPublicInClass()
    {
        await VerifyKeywordAsync("""
            class C {
                 unsafe static public $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedAbstractInInterface()
    {
        await VerifyAbsenceAsync("""
            interface C {
                abstract $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedVirtualInInterface()
    {
        await VerifyAbsenceAsync("""
            interface C {
                virtual $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedOverrideInInterface()
    {
        await VerifyAbsenceAsync("""
            interface C {
                override $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedSealedInInterface()
    {
        await VerifyAbsenceAsync("""
            interface C {
                sealed $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNestedReadOnlyInInterface()
    {
        await VerifyAbsenceAsync("""
            interface C {
                readonly $$
            """);
    }
 
    [Fact]
    public async Task TestAfterUnsafeStaticAbstractInInterface()
    {
        await VerifyKeywordAsync("""
            interface C {
                 unsafe static abstract $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterExternStaticAbstractInInterface()
    {
        await VerifyAbsenceAsync("""
            interface C {
                 extern static abstract $$
            """);
    }
}