// 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;
using Microsoft.CodeAnalysis.CSharp.RemoveConfusingSuppression;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Confusing;
 
using VerifyCS = CSharpCodeFixVerifier<CSharpRemoveConfusingSuppressionDiagnosticAnalyzer, CSharpRemoveConfusingSuppressionCodeFixProvider>;
 
public class RemoveConfusingSuppressionTests
{
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestRemoveWithIsExpression1()
    {
        await VerifyCS.VerifyCodeFixAsync(
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string)
                    {
                    }
                }
            }
            """,
            """
            class C
            {
                void M(object o)
                {
                    if (o is string)
                    {
                    }
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestRemoveWithIsPattern1()
    {
        await VerifyCS.VerifyCodeFixAsync(
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string s)
                    {
                    }
                }
            }
            """,
            """
            class C
            {
                void M(object o)
                {
                    if (o is string s)
                    {
                    }
                }
            }
            """);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestNegateWithIsExpression_CSharp8()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (!(o is string))
                    {
                    }
                }
            }
            """,
            CodeActionIndex = 1,
            LanguageVersion = LanguageVersion.CSharp8
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestNegateWithIsPattern_CSharp8()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string s)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (!(o is string s))
                    {
                    }
                }
            }
            """,
            CodeActionIndex = 1,
            LanguageVersion = LanguageVersion.CSharp8,
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestNegateWithIsExpression_CSharp9()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o is not string)
                    {
                    }
                }
            }
            """,
            CodeActionIndex = 1,
            LanguageVersion = LanguageVersion.CSharp9,
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestNegateWithIsPattern_CSharp9()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string s)
                    {
                    }
                }
            }
            """,
            FixedState =
            {
                Sources =
                {
                    """
                    class C
                    {
                        void M(object o)
                        {
                            if (o is not string s)
                            {
                            }
                        }
                    }
                    """
                },
            },
            CodeActionIndex = 1,
            LanguageVersion = LanguageVersion.CSharp9,
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestRemoveWithIsExpression_FixAll1()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string)
                    {
                    }
                    if (o [|!|]is string)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o is string)
                    {
                    }
                    if (o is string)
                    {
                    }
                }
            }
            """,
            NumberOfFixAllIterations = 1,
            CodeActionEquivalenceKey = CSharpRemoveConfusingSuppressionCodeFixProvider.RemoveOperator,
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestNegateWithIsExpression_FixAll1()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string)
                    {
                    }
                    if (o [|!|]is string)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (!(o is string))
                    {
                    }
                    if (!(o is string))
                    {
                    }
                }
            }
            """,
            CodeActionIndex = 1,
            CodeActionEquivalenceKey = CSharpRemoveConfusingSuppressionCodeFixProvider.NegateExpression,
            NumberOfFixAllIterations = 1,
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestRemoveWithIsPatternExpression_FixAll1()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string s)
                    {
                    }
                    if (o [|!|]is string t)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o is string s)
                    {
                    }
                    if (o is string t)
                    {
                    }
                }
            }
            """,
            NumberOfFixAllIterations = 1,
            CodeActionEquivalenceKey = CSharpRemoveConfusingSuppressionCodeFixProvider.RemoveOperator,
        }.RunAsync();
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/44872")]
    public async Task TestNegateWithIsPatternExpression_FixAll1()
    {
        await new VerifyCS.Test
        {
            TestCode =
            """
            class C
            {
                void M(object o)
                {
                    if (o [|!|]is string s)
                    {
                    }
                    if (o [|!|]is string t)
                    {
                    }
                }
            }
            """,
            FixedCode =
            """
            class C
            {
                void M(object o)
                {
                    if (!(o is string s))
                    {
                    }
                    if (!(o is string t))
                    {
                    }
                }
            }
            """,
            NumberOfFixAllIterations = 1,
            CodeActionIndex = 1,
            CodeActionEquivalenceKey = CSharpRemoveConfusingSuppressionCodeFixProvider.NegateExpression,
        }.RunAsync();
    }
}