// 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 SwitchKeywordRecommenderTests : 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()
    {
        await VerifyKeywordAsync(
            """
            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 TestEmptyStatement()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"$$"));
    }
 
    [Fact]
    public async Task TestBeforeStatement()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            $$
            return true;
            """));
    }
 
    [Fact]
    public async Task TestAfterStatement()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            return true;
            $$
            """));
    }
 
    [Fact]
    public async Task TestAfterBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            if (true) {
            }
            $$
            """));
    }
 
    [Fact]
    public async Task TestInsideSwitchBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (E) {
              case 0:
                $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterSwitch1()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"switch $$"));
    }
 
    [Fact]
    public async Task TestAfterExpression()
        => await VerifyKeywordAsync(AddInsideMethod(@"_ = expr $$"));
 
    [Fact]
    public async Task TestAfterExpression_InMethodWithArrowBody()
    {
        await VerifyKeywordAsync("""
            class C
            {
                bool M() => this $$
            }
            """);
    }
 
    [Fact]
    public async Task TestAfterForeachVar()
        => await VerifyAbsenceAsync(AddInsideMethod(@"foreach (var $$)"));
 
    [Fact]
    public async Task TestAfterTuple()
        => await VerifyKeywordAsync(AddInsideMethod(@"_ = (expr, expr) $$"));
 
    [Fact]
    public async Task TestNotAfterSwitch2()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"switch ($$"));
    }
 
    [Fact]
    public async Task TestNotInClass()
    {
        await VerifyAbsenceAsync("""
            class C
            {
              $$
            }
            """);
    }
 
    [Fact]
    public async Task TestAfterSwitch()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
               default:
            }
            $$
            """));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/8319")]
    public async Task TestNotAfterMethodReference()
    {
        await VerifyAbsenceAsync(
            """
            using System;
 
            class C {
                void M() {
                    var v = Console.WriteLine $$
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/8319")]
    public async Task TestNotAfterAnonymousMethod()
    {
        await VerifyAbsenceAsync(
            """
            using System;
 
            class C {
                void M() {
                    Action a = delegate { } $$
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/8319")]
    public async Task TestNotAfterLambda1()
    {
        await VerifyAbsenceAsync(
            """
            using System;
 
            class C {
                void M() {
                    Action b = (() => 0) $$
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/8319")]
    public async Task TestNotAfterLambda2()
    {
        await VerifyAbsenceAsync(
            """
            using System;
 
            class C {
                void M() {
                    Action b = () => {} $$
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/48573")]
    public async Task TestMissingAfterNumericLiteral()
    {
        await VerifyAbsenceAsync(
            """
            class C
            {
                void M()
                {
                    var x = 1$$
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/48573")]
    public async Task TestMissingAfterNumericLiteralAndDot()
    {
        await VerifyAbsenceAsync(
            """
            class C
            {
                void M()
                {
                    var x = 1.$$
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/48573")]
    public async Task TestMissingAfterNumericLiteralDotAndSpace()
    {
        await VerifyAbsenceAsync(
            """
            class C
            {
                void M()
                {
                    var x = 1. $$
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/31367")]
    public async Task TestMissingInCaseClause1()
    {
        await VerifyAbsenceAsync(
            """
            class A
            {
 
            }
 
            class C
            {
                void M(object o)
                {
                    switch (o)
                    {
                        case A $$
                    }
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/31367")]
    public async Task TestMissingInCaseClause2()
    {
        await VerifyAbsenceAsync(
            """
            namespace N
            {
                class A
                {
 
                }
            }
 
            class C
            {
                void M(object o)
                {
                    switch (o)
                    {
                        case N.A $$
                    }
                }
            }
            """);
    }
}