// 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.Structure;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Structure;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Structure;
 
[Trait(Traits.Feature, Traits.Features.Outlining)]
public class RegionDirectiveStructureTests : AbstractCSharpSyntaxNodeStructureTests<RegionDirectiveTriviaSyntax>
{
    internal override AbstractSyntaxStructureProvider CreateProvider() => new RegionDirectiveStructureProvider();
 
    [Fact]
    public async Task BrokenRegion()
    {
        var code = """
                $$#region Goo
                """;
 
        await VerifyNoBlockSpansAsync(code);
    }
 
    [Fact]
    public async Task SimpleRegion()
    {
        var code = """
                {|span:$$#region Goo
                #endregion|}
                """;
 
        await VerifyBlockSpansAsync(code,
            Region("span", "Goo", autoCollapse: false, isDefaultCollapsed: true));
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/539361")]
    public async Task RegressionFor5284()
    {
        var code = """
                namespace BasicGenerateFromUsage
                {
                    class BasicGenerateFromUsage
                    {
                        {|span:#reg$$ion TaoRegion
 
                        static void Main(string[] args)
                        {
                            /*Marker1*/
                            CustomStack s = new CustomStack(); //Generate new class
 
                            //Generate constructor
                            Classic cc = new Classic(5, 6, 7);/*Marker2*/
 
                            Classic cc = new Classic();
                            //generate property
                            cc.NewProperty = 5; /*Marker3*/
 
                        }
                        #endregion TaoRegion|}
                    }
 
                    class Classic
                    {
                    }
                }
                """;
 
        await VerifyBlockSpansAsync(code,
            Region("span", "TaoRegion", autoCollapse: false, isDefaultCollapsed: true));
    }
 
    [Theory, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/953668"), CombinatorialData]
    public async Task RegionsShouldBeCollapsedByDefault(bool collapseRegionsWhenFirstOpened)
    {
        var code = """
                class C
                {
                    {|span:#region Re$$gion
                    static void Main(string[] args)
                    {
                    }
                    #endregion|}
                }
                """;
 
        var options = GetDefaultOptions() with
        {
            CollapseRegionsWhenFirstOpened = collapseRegionsWhenFirstOpened
        };
 
        await VerifyBlockSpansAsync(code, options,
            Region("span", "Region", autoCollapse: false, isDefaultCollapsed: collapseRegionsWhenFirstOpened));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/4105")]
    public async Task SpacesBetweenPoundAndRegionShouldNotAffectBanner()
    {
        var code = """
                class C
                {
                {|span:#  region R$$egion
                    static void Main(string[] args)
                    {
                    }
                #  endregion|}
                }
                """;
 
        await VerifyBlockSpansAsync(code,
            Region("span", "Region", autoCollapse: false, isDefaultCollapsed: true));
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/75583")]
    public async Task Trailing()
    {
        var code = """
            {|span:#region R$$1
            /* comment */ #endregion
            /* comment */ #region R2
            #endregion|}
            """;
 
        await VerifyBlockSpansAsync(code,
            Region("span", "R1", autoCollapse: false, isDefaultCollapsed: true));
    }
}