// 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;
using System.Threading;
using System.Threading.Tasks;
using NuGet.Protocol.Core.Types;

namespace NuGet.Protocol
{
    public class AutoCompleteResourceV3Provider : ResourceProvider
    {
        public AutoCompleteResourceV3Provider()
            : base(typeof(AutoCompleteResource), nameof(AutoCompleteResourceV3Provider), nameof(AutoCompleteResourceV2FeedProvider))
        {
        }

        public override async Task<Tuple<bool, INuGetResource?>> TryCreate(SourceRepository source, CancellationToken token)
        {
            AutoCompleteResourceV3? curResource = null;

            var serviceIndex = await source.GetResourceAsync<ServiceIndexResourceV3>(token);

            if (serviceIndex != null)
            {
                var regResource = await source.GetResourceAsync<RegistrationResourceV3>(token)
                    ?? throw new InvalidOperationException($"The source '{source.PackageSource.Source}' does not provide {nameof(RegistrationResourceV3)}.");
                var httpSourceResource = await source.GetResourceAsync<HttpSourceResource>(token)
                    ?? throw new InvalidOperationException($"The source '{source.PackageSource.Source}' does not provide {nameof(HttpSourceResource)}.");

                // construct a new resource
                curResource = new AutoCompleteResourceV3(httpSourceResource.HttpSource, serviceIndex, regResource);
            }

            return new Tuple<bool, INuGetResource?>(curResource != null, curResource);
        }
    }
}