// 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;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Structure;

namespace Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.Structure;

internal static class OmniSharpBlockStructureService
{
    public static async Task<OmniSharpBlockStructure?> GetBlockStructureAsync(Document document, OmniSharpBlockStructureOptions options, CancellationToken cancellationToken)
    {
        var service = document.GetRequiredLanguageService<BlockStructureService>();
        var blockStructure = await service.GetBlockStructureAsync(document, options.ToBlockStructureOptions(), cancellationToken).ConfigureAwait(false);
        if (blockStructure != null)
        {
            return new OmniSharpBlockStructure(blockStructure.Spans.SelectAsArray(x => new OmniSharpBlockSpan(x.Type, x.IsCollapsible, x.TextSpan, x.HintSpan, x.BannerText, x.AutoCollapse, x.IsDefaultCollapsed)));
        }
        else
        {
            return null;
        }
    }
}