// 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.Collections.Immutable;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.ExternalAccess.UnitTesting;
using Microsoft.CodeAnalysis.ExternalAccess.UnitTesting.Api;
using Microsoft.CodeAnalysis.Shared.Extensions;
 
namespace Microsoft.CodeAnalysis.Remote
{
    internal sealed class RemoteUnitTestingSearchService : BrokeredServiceBase, IRemoteUnitTestingSearchService
    {
        internal sealed class Factory : FactoryBase<IRemoteUnitTestingSearchService>
        {
            protected override IRemoteUnitTestingSearchService CreateService(in ServiceConstructionArguments arguments)
                => new RemoteUnitTestingSearchService(arguments);
        }
 
        public RemoteUnitTestingSearchService(in ServiceConstructionArguments arguments)
            : base(arguments)
        {
        }
 
        public ValueTask<UnitTestingSourceLocation?> GetSourceLocationAsync(
            Checksum solutionChecksum,
            ProjectId projectId,
            UnitTestingSearchQuery query,
            CancellationToken cancellationToken)
        {
            return RunServiceAsync<UnitTestingSourceLocation?>(solutionChecksum, async solution =>
            {
                var project = solution.GetRequiredProject(projectId);
 
                var resultOpt = await UnitTestingSearchHelpers.GetSourceLocationAsync(project, query, cancellationToken).ConfigureAwait(false);
                if (resultOpt is null)
                    return null;
 
                var result = resultOpt.Value;
 
                return new UnitTestingSourceLocation(
                    new DocumentIdSpan(result.DocumentSpan.Document.Id, result.DocumentSpan.SourceSpan),
                    result.Span);
            }, cancellationToken);
        }
 
        public ValueTask<ImmutableArray<UnitTestingSourceLocation>> GetSourceLocationsAsync(
            Checksum solutionChecksum,
            ProjectId projectId,
            UnitTestingSearchQuery query,
            CancellationToken cancellationToken)
        {
            return RunServiceAsync(solutionChecksum, async solution =>
            {
                var project = solution.GetRequiredProject(projectId);
 
                var results = await UnitTestingSearchHelpers.GetSourceLocationsAsync(project, query, cancellationToken).ConfigureAwait(false);
 
                return results.SelectAsArray(r => new UnitTestingSourceLocation(
                    new DocumentIdSpan(r.DocumentSpan.Document.Id, r.DocumentSpan.SourceSpan),
                    r.Span));
            }, cancellationToken);
        }
    }
}