// 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 FixedKeywordRecommenderTests : 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 TestNotInsideEmptyMethod()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"$$"));
    }
 
    [Fact]
    public async Task TestInsideUnsafeBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            unsafe {
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterFixed()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            unsafe {
                fixed (int* = bar) {
                }
                $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterFixed()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
            """
            fixed (int* = bar) {
              }
              $$
            """));
    }
 
    [Fact]
    public async Task TestNotInClass()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                $$
            """);
    }
 
    [Fact]
    public async Task TestNotInStruct()
    {
        await VerifyAbsenceAsync(
            """
            struct S {
                $$
            """);
    }
 
    [Fact]
    public async Task TestNotInRecordStruct()
    {
        await VerifyAbsenceAsync(
            """
            record struct S {
                $$
            """);
    }
 
    [Fact]
    public async Task TestInUnsafeStruct()
    {
        await VerifyKeywordAsync(
            """
            unsafe struct S {
                $$
            """);
    }
 
    [Fact]
    public async Task TestInUnsafeNestedStruct1()
    {
        await VerifyKeywordAsync(
            """
            unsafe struct S {
                struct T {
                  $$
            """);
    }
 
    [Fact]
    public async Task TestInUnsafeNestedStruct2()
    {
        await VerifyKeywordAsync(
            """
            struct S {
                unsafe struct T {
                  $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterStatic()
    {
        await VerifyAbsenceAsync(
            """
            unsafe struct S {
                static $$
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52296")]
    public async Task TestInUnsafeLocalFunction()
    {
        await VerifyKeywordAsync(
            """
            public class C
            {
                public void M()
                {
                    unsafe void Local()
                    {
                        $$
                    }
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52296")]
    public async Task TestNotInOrdinaryLocalFunction()
    {
        await VerifyAbsenceAsync(
            """
            public class C
            {
                public void M()
                {
                    void Local()
                    {
                        $$
                    }
                }
            }
            """);
    }
}