// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Collections.Generic;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Razor.Evolution;
using Microsoft.CodeAnalysis;

namespace Microsoft.VisualStudio.LanguageServices.Razor
{
    [Export(typeof(IRazorEngineDirectiveResolver))]
    internal class DefaultRazorEngineDirectiveResolver : IRazorEngineDirectiveResolver
    {
        public async Task<IEnumerable<DirectiveDescriptor>> GetRazorEngineDirectivesAsync(Workspace workspace, Project project, CancellationToken cancellationToken = default(CancellationToken))
        {
            var client = await RazorLanguageServiceClientFactory.CreateAsync(workspace, cancellationToken);

            using (var session = await client.CreateSessionAsync(project.Solution))
            {
                var directives = await session.InvokeAsync<IEnumerable<DirectiveDescriptor>>("GetDirectivesAsync", new object[] { project.Id.Id, "Foo", }).ConfigureAwait(false);
                return directives;
            }
        }
    }
}