// 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.
 
#nullable disable
 
using System.Threading.Tasks;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.SplitOrMergeIfStatements;
 
public sealed partial class MergeConsecutiveIfStatementsTests
{
    [Fact]
    public async Task MergedOnMiddleIfMergableWithNextOnly()
    {
        const string Initial =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a)
                        System.Console.WriteLine(null);
                    [||]else {|applicableSpan:if (b)
                        System.Console.WriteLine();
                    else if (c)
                        System.Console.WriteLine();|}
                }
            }
            """;
        const string Expected =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a)
                        System.Console.WriteLine(null);
                    else if (b || c)
                        System.Console.WriteLine();
                }
            }
            """;
 
        await TestActionCountAsync(Initial, 1);
        await TestInRegularAndScriptAsync(Initial, Expected);
        await TestCodeRefactoringApplicableTextSpan(Initial, "applicableSpan");
    }
 
    [Fact]
    public async Task MergedOnMiddleIfMergableWithPreviousOnly()
    {
        const string Initial =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a)
                        System.Console.WriteLine();
                    [||]else if (b)
                        System.Console.WriteLine();
                    else if (c)
                        System.Console.WriteLine(null);
                }
            }
            """;
        const string Expected =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a || b)
                        System.Console.WriteLine();
                    else if (c)
                        System.Console.WriteLine(null);
                }
            }
            """;
 
        await TestActionCountAsync(Initial, 1);
        await TestInRegularAndScriptAsync(Initial, Expected);
    }
 
    [Fact]
    public async Task MergedOnMiddleIfMergableWithBoth()
    {
        const string Initial =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a)
                        System.Console.WriteLine();
                    [||]else if (b)
                        System.Console.WriteLine();
                    else if (c)
                        System.Console.WriteLine();
                }
            }
            """;
        const string Expected1 =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a || b)
                        System.Console.WriteLine();
                    else if (c)
                        System.Console.WriteLine();
                }
            }
            """;
        const string Expected2 =
            """
            class C
            {
                void M(bool a, bool b, bool c)
                {
                    if (a)
                        System.Console.WriteLine();
                    else if (b || c)
                        System.Console.WriteLine();
                }
            }
            """;
 
        await TestActionCountAsync(Initial, 2);
        await TestInRegularAndScriptAsync(Initial, Expected1, index: 0);
        await TestInRegularAndScriptAsync(Initial, Expected2, index: 1);
    }
}