// 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 Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Recommendations;
 
[Trait(Traits.Feature, Traits.Features.KeywordRecommending)]
public sealed class ConstKeywordRecommenderTests : KeywordRecommenderTests
{
    [Fact]
    public async Task TestAtRoot()
    {
        await VerifyKeywordAsync(
@"$$");
    }
 
    [Fact]
    public async Task TestAfterClass()
    {
        await VerifyKeywordAsync(
            """
            class C { }
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterGlobalStatement()
    {
        await VerifyKeywordAsync(
            """
            System.Console.WriteLine();
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterGlobalVariableDeclaration()
    {
        await VerifyKeywordAsync(
            """
            int i = 0;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotInUsingAlias()
    {
        await VerifyAbsenceAsync(
@"using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInGlobalUsingAlias()
    {
        await VerifyAbsenceAsync(
@"global using Goo = $$");
    }
 
    [Theory, CombinatorialData]
    public async Task TestInEmptyStatement(bool topLevelStatement)
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"$$", topLevelStatement: topLevelStatement), options: CSharp9ParseOptions);
    }
 
    [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 TestAfterDelegateDeclaration()
    {
        await VerifyKeywordAsync("""
            delegate void Goo();
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterMethod()
    {
        await VerifyKeywordAsync(
            """
            class C {
              void Goo() {}
              $$
            """);
    }
 
    [Fact]
    public async Task TestAfterField()
    {
        await VerifyKeywordAsync(
            """
            class C {
              int i;
              $$
            """);
    }
 
    [Fact]
    public async Task TestAfterProperty()
    {
        await VerifyKeywordAsync(
            """
            class C {
              int i { get; }
              $$
            """);
    }
 
    [Theory]
    [InlineData(SourceCodeKind.Regular)]
    [InlineData(SourceCodeKind.Script, Skip = "https://github.com/dotnet/roslyn/issues/9880")]
    public async Task TestNotBeforeUsing(SourceCodeKind sourceCodeKind)
    {
        await VerifyAbsenceAsync(sourceCodeKind,
            """
            $$
            using Goo;
            """);
    }
 
    [Theory]
    [InlineData(SourceCodeKind.Regular)]
    [InlineData(SourceCodeKind.Script, Skip = "https://github.com/dotnet/roslyn/issues/9880")]
    public async Task TestNotBeforeGlobalUsing(SourceCodeKind sourceCodeKind)
    {
        await VerifyAbsenceAsync(sourceCodeKind,
            """
            $$
            global using Goo;
            """);
    }
 
    [Fact]
    public async Task TestAfterAssemblyAttribute()
    {
        await VerifyKeywordAsync("""
            [assembly: goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterRootAttribute()
    {
        await VerifyKeywordAsync(SourceCodeKind.Regular, """
            [goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterRootAttribute_Interactive()
    {
        await VerifyKeywordAsync(SourceCodeKind.Script, """
            [goo]
            $$
            """);
    }
 
    [Fact]
    public async Task TestAfterNestedAttribute()
    {
        await VerifyKeywordAsync(
            """
            class C {
              [goo]
              $$
            """);
    }
 
    [Fact]
    public async Task TestInsideStruct()
    {
        await VerifyKeywordAsync(
            """
            struct S {
               $$
            """);
    }
 
    [Fact]
    public async Task TestInsideInterface()
    {
        await VerifyKeywordAsync("""
            interface I {
               $$
            """);
    }
 
    [Fact]
    public async Task TestNotInsideEnum()
    {
        await VerifyAbsenceAsync("""
            enum E {
               $$
            """);
    }
 
    [Fact]
    public async Task TestInsideClass()
    {
        await VerifyKeywordAsync(
            """
            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(SourceCodeKind.Regular, @"internal $$");
 
    [Fact]
    public async Task TestAfterInternal_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"internal $$");
 
    [Fact]
    public async Task TestAfterNestedInternal()
    {
        await VerifyKeywordAsync(
            """
            class C {
                internal $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterPublic()
        => await VerifyAbsenceAsync(SourceCodeKind.Regular, @"public $$");
 
    [Fact]
    public async Task TestAfterPublic_Interactive()
        => await VerifyKeywordAsync(SourceCodeKind.Script, @"public $$");
 
    [Fact]
    public async Task TestAfterNestedPublic()
    {
        await VerifyKeywordAsync(
            """
            class C {
                public $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterPrivate()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Regular,
@"private $$");
    }
 
    [Fact]
    public async Task TestAfterPrivate_Script()
    {
        await VerifyKeywordAsync(SourceCodeKind.Script,
@"private $$");
    }
 
    [Fact]
    public async Task TestAfterNestedPrivate()
    {
        await VerifyKeywordAsync(
            """
            class C {
                private $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterProtected()
    {
        await VerifyAbsenceAsync(
@"protected $$");
    }
 
    [Fact]
    public async Task TestAfterNestedProtected()
    {
        await VerifyKeywordAsync(
            """
            class C {
                protected $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterSealed()
        => await VerifyAbsenceAsync(@"sealed $$");
 
    [Fact]
    public async Task TestNotAfterNestedSealed()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                sealed $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterStatic()
        => await VerifyAbsenceAsync(@"static $$");
 
    [Fact]
    public async Task TestNotAfterNestedStatic()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                static $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterStaticPublic()
        => await VerifyAbsenceAsync(@"static public $$");
 
    [Fact]
    public async Task TestNotAfterNestedStaticPublic()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                static public $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterDelegate()
        => await VerifyAbsenceAsync(@"delegate $$");
 
    [Fact]
    public async Task TestNotAfterEvent()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                event $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterConst()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                const $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterNew()
    {
        await VerifyAbsenceAsync(
@"new $$");
    }
 
    [Fact]
    public async Task TestAfterNestedNew()
    {
        await VerifyKeywordAsync(
            """
            class C {
               new $$
            """);
    }
 
    [Fact]
    public async Task TestInMethod()
    {
        await VerifyKeywordAsync(
            """
            class C {
               void Goo() {
                 $$
            """);
    }
 
    [Fact]
    public async Task TestInMethodNotAfterConst()
    {
        await VerifyAbsenceAsync(
            """
            class C {
               void Goo() {
                 const $$
            """);
    }
 
    [Fact]
    public async Task TestInProperty()
    {
        await VerifyKeywordAsync(
            """
            class C {
                int Goo {
                    get {
                    $$
            """);
    }
 
    [Fact]
    public async Task TestWithinExtension()
    {
        await VerifyAbsenceAsync(
            """
            static class C
            {
                extension(string s)
                {
                    $$
                }
            }
            """,
            CSharpNextParseOptions,
            CSharpNextScriptParseOptions);
    }
}