// 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;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Host.Mef;
 
namespace Microsoft.VisualStudio.LanguageServices.LiveShare.Client.Projects;
 
/// <summary>
/// Discovers project information for remote directories
/// </summary>
[Export(typeof(RemoteProjectInfoProvider))]
internal sealed class RemoteProjectInfoProvider
{
    private readonly IEnumerable<IRemoteProjectInfoProvider> _remoteProjectInfoProviders;
 
    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public RemoteProjectInfoProvider([ImportMany] IEnumerable<IRemoteProjectInfoProvider> remoteProjectInfoProviders)
        => _remoteProjectInfoProviders = remoteProjectInfoProviders ?? throw new ArgumentNullException(nameof(remoteProjectInfoProviders));
 
    public async Task<IReadOnlyCollection<ProjectInfo>> GetRemoteProjectInfosAsync(CancellationToken cancellationToken)
    {
        var projectInfos = new List<ProjectInfo>();
        foreach (var remoteProjectInfoProvider in _remoteProjectInfoProviders)
        {
            try
            {
                foreach (var projectInfo in await remoteProjectInfoProvider.GetRemoteProjectInfosAsync(cancellationToken).ConfigureAwait(false))
                {
                    projectInfos.Add(projectInfo);
                }
            }
            catch (Exception)
            {
                // Continue with the other providers even if one of them fails. 
                continue;
            }
        }
 
        return projectInfos;
    }
}