// 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 IfKeywordRecommenderTests : 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 TestNotInPreprocessor1()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
"#if $$"));
    }
 
    [Fact]
    public async Task TestEmptyStatement()
    {
        await VerifyKeywordAsync(AddInsideMethod(
@"$$"));
    }
 
    [Fact]
    public async Task TestAfterHash()
    {
        await VerifyKeywordAsync(
@"#$$");
    }
 
    [Fact]
    public async Task TestAfterHashFollowedBySkippedTokens()
    {
        await VerifyKeywordAsync(
            """
            #$$
            aeu
            """);
    }
 
    [Fact]
    public async Task TestAfterHashAndSpace()
    {
        await VerifyKeywordAsync(
@"# $$");
    }
 
    [Fact]
    public async Task TestInsideMethod()
    {
        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 TestNotAfterIf()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"if $$"));
    }
 
    [Fact]
    public async Task TestInCase()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (true) {
              case 0:
                $$
            }
            """));
    }
 
    [Fact]
    public async Task TestInCaseBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (true) {
              case 0: {
                $$
              }
            }
            """));
    }
 
    [Fact]
    public async Task TestInDefaultCase()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (true) {
              default:
                $$
            }
            """));
    }
 
    [Fact]
    public async Task TestInDefaultCaseBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (true) {
              default: {
                $$
              }
            }
            """));
    }
 
    [Fact]
    public async Task TestAfterLabel()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            label:
              $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterDoBlock()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
            """
            do {
            }
            $$
            """));
    }
 
    [Fact]
    public async Task TestInActiveRegion1()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            #if true
            $$
            """));
    }
 
    [Fact]
    public async Task TestInActiveRegion2()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            #if true
 
            $$
            """));
    }
 
    [Fact]
    public async Task TestAfterElse()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            if (goo) {
            } else $$
            """));
    }
 
    [Fact]
    public async Task TestAfterCatch()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"try {} catch $$"));
    }
 
    [Fact]
    public async Task TestAfterCatchDeclaration1()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"try {} catch (Exception) $$"));
    }
 
    [Fact]
    public async Task TestAfterCatchDeclaration2()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"try {} catch (Exception e) $$"));
    }
 
    [Fact]
    public async Task TestAfterCatchDeclarationEmpty()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"try {} catch () $$"));
    }
 
    [Fact]
    public async Task TestNotAfterTryBlock()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"try {} $$"));
    }
}