// 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 class PartialKeywordRecommenderTests : KeywordRecommenderTests
    {
        [Fact]
        public async Task TestAtRoot_Interactive()
        {
            await VerifyKeywordAsync(SourceCodeKind.Script,
@"$$");
        }
 
        [Fact]
        public async Task TestAfterClass_Interactive()
        {
            await VerifyKeywordAsync(SourceCodeKind.Script,
@"class C { }
$$");
        }
 
        [Fact]
        public async Task TestAfterGlobalStatement_Interactive()
        {
            await VerifyKeywordAsync(SourceCodeKind.Script,
@"System.Console.WriteLine();
$$");
        }
 
        [Fact]
        public async Task TestAfterGlobalVariableDeclaration_Interactive()
        {
            await VerifyKeywordAsync(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 TestInCompilationUnit()
        {
            await VerifyKeywordAsync(
@"$$");
        }
 
        [Fact]
        public async Task TestAfterExtern()
        {
            await VerifyKeywordAsync(
@"extern alias Goo;
$$");
        }
 
        [Fact]
        public async Task TestAfterUsing()
        {
            await VerifyKeywordAsync(
@"using Goo;
$$");
        }
 
        [Fact]
        public async Task TestAfterGlobalUsing()
        {
            await VerifyKeywordAsync(
@"global using Goo;
$$");
        }
 
        [Fact]
        public async Task TestAfterNamespace()
        {
            await VerifyKeywordAsync(
@"namespace N {}
$$");
        }
 
        [Fact]
        public async Task TestAfterFileScopedNamespace()
        {
            await VerifyKeywordAsync(
@"namespace N;
$$");
        }
 
        [Fact]
        public async Task TestAfterTypeDeclaration()
        {
            await VerifyKeywordAsync(
@"class C {}
$$");
        }
 
        [Fact]
        public async Task TestAfterDelegateDeclaration()
        {
            await VerifyKeywordAsync(
@"delegate void Goo();
$$");
        }
 
        [Fact]
        public async Task TestNotAfterMethod()
        {
            await VerifyKeywordAsync(
@"class C {
  void Goo() {}
  $$");
        }
 
        [Fact]
        public async Task TestAfterMethodInPartialType()
        {
            await VerifyKeywordAsync(
@"partial class C {
  void Goo() {}
  $$");
        }
 
        [Fact]
        public async Task TestAfterFieldInPartialClass()
        {
            await VerifyKeywordAsync(
@"partial class C {
  int i;
  $$");
        }
 
        [Fact]
        public async Task TestAfterPropertyInPartialClass()
        {
            await VerifyKeywordAsync(
@"partial class C {
  int i { get; }
  $$");
        }
 
        [Fact]
        public async Task TestNotBeforeUsing()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"$$
using Goo;");
        }
 
        [Fact(Skip = "https://github.com/dotnet/roslyn/issues/9880")]
        public async Task TestNotBeforeUsing_Interactive()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$
using Goo;");
        }
 
        [Fact]
        public async Task TestNotBeforeGlobalUsing()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"$$
global using Goo;");
        }
 
        [Fact(Skip = "https://github.com/dotnet/roslyn/issues/9880")]
        public async Task TestNotBeforeGlobalUsing_Interactive()
        {
            await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$
global using Goo;");
        }
 
        [Fact]
        public async Task TestAfterAssemblyAttribute()
        {
            await VerifyKeywordAsync(
@"[assembly: goo]
$$");
        }
 
        [Fact]
        public async Task TestAfterRootAttribute()
        {
            await VerifyKeywordAsync(
@"[goo]
$$");
        }
 
        [Fact]
        public async Task TestAfterNestedAttributeInPartialClass()
        {
            await VerifyKeywordAsync(
@"partial class C {
  [goo]
  $$");
        }
 
        [Fact]
        public async Task TestInsideStruct()
        {
            await VerifyKeywordAsync(
@"struct S {
   $$");
        }
 
        // This will be fixed once we have accessibility for members
        [Fact]
        public async Task TestInsidePartialStruct()
        {
            await VerifyKeywordAsync(
@"partial struct S {
   $$");
        }
 
        [Fact]
        public async Task TestInsideInterface()
        {
            await VerifyKeywordAsync(@"interface I {
   $$");
        }
 
        [Fact]
        public async Task TestInsidePartialClass()
        {
            await VerifyKeywordAsync(
@"partial class C {
   $$");
        }
 
        [Fact]
        public async Task TestNotAfterPartial()
            => await VerifyAbsenceAsync(@"partial $$");
 
        [Fact]
        public async Task TestAfterAbstract()
        {
            await VerifyKeywordAsync(
@"abstract $$");
        }
 
        [Fact]
        public async Task TestAfterInternal()
        {
            await VerifyKeywordAsync(
@"internal $$");
        }
 
        [Fact]
        public async Task TestAfterPublic()
        {
            await VerifyKeywordAsync(
@"public $$");
        }
 
        [Fact]
        public async Task TestAfterStaticPublic()
        {
            await VerifyKeywordAsync(
@"static public $$");
        }
 
        [Fact]
        public async Task TestAfterPublicStatic()
        {
            await VerifyKeywordAsync(
@"public static $$");
        }
 
        [Fact]
        public async Task TestNotAfterInvalidPublic()
            => await VerifyAbsenceAsync(@"virtual public $$");
 
        [Fact]
        public async Task TestAfterPrivate()
        {
            await VerifyKeywordAsync(
@"private $$");
        }
 
        [Fact]
        public async Task TestAfterProtected()
        {
            await VerifyKeywordAsync(
@"protected $$");
        }
 
        [Fact]
        public async Task TestAfterSealed()
        {
            await VerifyKeywordAsync(
@"sealed $$");
        }
 
        [Fact]
        public async Task TestAfterStatic()
        {
            await VerifyKeywordAsync(
@"static $$");
        }
 
        [Fact]
        public async Task TestNotAfterStaticInUsingDirective()
        {
            await VerifyAbsenceAsync(
@"using static $$");
        }
 
        [Fact]
        public async Task TestNotAfterStaticInGlobalUsingDirective()
        {
            await VerifyAbsenceAsync(
@"global using static $$");
        }
 
        [Fact]
        public async Task TestNotAfterClass()
            => await VerifyAbsenceAsync(@"class $$");
 
        [Fact]
        public async Task TestNotAfterDelegate()
            => await VerifyAbsenceAsync(@"delegate $$");
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/32214")]
        public async Task TestNotBetweenUsings()
        {
            // Recommendation in scripting is not stable. See https://github.com/dotnet/roslyn/issues/32214
            await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"using Goo;
$$
using Bar;");
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/32214")]
        public async Task TestNotBetweenGlobalUsings_01()
        {
            // Recommendation in scripting is not stable. See https://github.com/dotnet/roslyn/issues/32214
            await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"global using Goo;
$$
using Bar;");
        }
 
        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/32214")]
        public async Task TestNotBetweenGlobalUsings_02()
        {
            // Recommendation in scripting is not stable. See https://github.com/dotnet/roslyn/issues/32214
            await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"global using Goo;
$$
global using Bar;");
        }
 
        [Fact]
        public async Task TestAfterNestedAbstract()
        {
            await VerifyKeywordAsync(
@"class C {
    abstract $$");
        }
 
        [Fact]
        public async Task TestNotAfterNestedVirtual()
        {
            await VerifyAbsenceAsync(@"class C {
    virtual $$");
        }
 
        [Fact]
        public async Task TestNotAfterNestedOverride()
        {
            await VerifyAbsenceAsync(@"class C {
    override $$");
        }
 
        [Fact]
        public async Task TestAfterNestedSealed()
        {
            await VerifyKeywordAsync(
@"class C {
    sealed $$");
        }
 
        [Fact]
        public async Task TestAfterNestedReadOnly()
        {
            await VerifyKeywordAsync(@"class C {
    readonly $$");
        }
 
        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/578075")]
        public async Task TestAfterAsync()
        {
            await VerifyKeywordAsync(@"partial class C {
    async $$");
        }
    }
}