// 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.CSharp.Test.Utilities;
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 BaseKeywordRecommenderTests : KeywordRecommenderTests
{
    [Fact]
    public async Task TestNotAtRoot_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$");
    }
 
    [Fact]
    public async Task TestNotInTopLevelMethod()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            void Goo()
            {
                $$
            }
            """);
    }
 
    [Fact]
    public async Task TestNotAfterClass_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            class C { }
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalStatement()
    {
        await VerifyAbsenceAsync(
            """
            System.Console.WriteLine();
            $$
            """, options: CSharp9ParseOptions);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalVariableDeclaration()
    {
        await VerifyAbsenceAsync(
            """
            int i = 0;
            $$
            """, options: CSharp9ParseOptions);
    }
 
    [Fact]
    public async Task TestNotInUsingAlias()
    {
        await VerifyAbsenceAsync(
@"using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInGlobalUsingAlias()
    {
        await VerifyAbsenceAsync(
@"global using Goo = $$");
    }
 
    [Fact]
    public async Task TestInClassConstructorInitializer()
    {
        await VerifyKeywordAsync(
            """
            class C {
                public C() : $$
            """);
    }
 
    [Fact]
    public async Task TestInRecordConstructorInitializer()
    {
        // The recommender doesn't work in record in script
        // Tracked by https://github.com/dotnet/roslyn/issues/44865
        await VerifyWorkerAsync("""
            record C {
                public C() : $$
            """, absent: false, options: TestOptions.RegularPreview);
    }
 
    [Fact]
    public async Task TestNotInStaticClassConstructorInitializer()
    {
        await VerifyAbsenceAsync(
            """
            class C {
                static C() : $$
            """);
    }
 
    [Fact]
    public async Task TestNotInStructConstructorInitializer()
    {
        await VerifyAbsenceAsync(
            """
            struct C {
                public C() : $$
            """);
    }
 
    [Fact]
    public async Task TestAfterCast()
    {
        await VerifyKeywordAsync(
            """
            struct C {
                new internal ErrorCode Code { get { return (ErrorCode)$$
            """);
    }
 
    [Fact]
    public async Task TestInEmptyMethod()
    {
        await VerifyKeywordAsync(
            SourceCodeKind.Regular,
            AddInsideMethod(
@"$$"));
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/538264")]
    public async Task TestNotInEnumMemberInitializer1()
    {
        await VerifyAbsenceAsync(
            """
            enum E {
                a = $$
            }
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544219")]
    public async Task TestNotInObjectInitializerMemberContext()
    {
        await VerifyAbsenceAsync("""
            class C
            {
                public int x, y;
                void M()
                {
                    var c = new C { x = 2, y = 3, $$
            """);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/16335")]
    public async Task InExpressionBodyAccessor()
    {
        await VerifyKeywordAsync("""
            class B
            {
                public virtual int T { get => bas$$ }
            }
            """);
    }
 
    [Fact]
    public async Task TestAfterRefExpression()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"ref int x = ref $$"));
    }
 
    #region Collection expressions
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_BeforeFirstElementToVar()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var x = [$$
            """));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_BeforeFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [$$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_AfterFirstElementToVar()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            var x = [new object(), $$
            """));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_AfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, $$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_SpreadBeforeFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [.. $$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_SpreadAfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, .. $$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenAtFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [($$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenAfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, ($$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenSpreadAtFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [.. ($$
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/70677")]
    public async Task TestInCollectionExpressions_ParenSpreadAfterFirstElementToReturn()
    {
        await VerifyKeywordAsync(
            """
            class C
            {
                IEnumerable<string> M() => [string.Empty, .. ($$
            }
            """);
    }
 
    #endregion
}