// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections.Immutable;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.ExternalAccess.Razor.Cohost;
using Microsoft.CodeAnalysis.ExternalAccess.Razor.Features;
using Microsoft.CodeAnalysis.Razor.Cohost;
using Microsoft.CodeAnalysis.Razor.Remote;
 
namespace Microsoft.VisualStudio.Razor.LanguageClient.Cohost;
 
#pragma warning disable RS0030 // Do not use banned APIs
[Shared]
[CohostEndpoint(VSInternalMethods.TextDocumentDataTipRangeName)]
[Export(typeof(IDynamicRegistrationProvider))]
[ExportRazorStatelessLspService(typeof(CohostDataTipRangeEndpoint))]
[method: ImportingConstructor]
#pragma warning restore RS0030 // Do not use banned APIs
internal sealed class CohostDataTipRangeEndpoint(
    IIncompatibleProjectService incompatibleProjectService,
    IRemoteServiceInvoker remoteServiceInvoker)
    : AbstractCohostDocumentEndpoint<TextDocumentPositionParams, VSInternalDataTip?>(incompatibleProjectService), IDynamicRegistrationProvider
{
    private readonly IRemoteServiceInvoker _remoteServiceInvoker = remoteServiceInvoker;
 
    protected override bool MutatesSolutionState => false;
 
    protected override bool RequiresLSPSolution => true;
 
    public ImmutableArray<Registration> GetRegistrations(VSInternalClientCapabilities clientCapabilities, RazorCohostRequestContext requestContext)
    {
        return [new Registration
        {
            Method = VSInternalMethods.TextDocumentDataTipRangeName,
            RegisterOptions = new TextDocumentRegistrationOptions()
        }];
    }
 
    protected override RazorTextDocumentIdentifier? GetRazorTextDocumentIdentifier(TextDocumentPositionParams request)
        => request.TextDocument.ToRazorTextDocumentIdentifier();
 
    protected override Task<VSInternalDataTip?> HandleRequestAsync(TextDocumentPositionParams request, TextDocument razorDocument, CancellationToken cancellationToken)
        => HandleRequestAsync(razorDocument, request.Position, cancellationToken);
 
    private async Task<VSInternalDataTip?> HandleRequestAsync(TextDocument razorDocument, Position position, CancellationToken cancellationToken)
    {
        var data = await _remoteServiceInvoker.TryInvokeAsync<IRemoteDataTipRangeService, RemoteResponse<VSInternalDataTip?>>(
            razorDocument.Project.Solution,
            (service, solutionInfo, cancellationToken) => service.GetDataTipRangeAsync(solutionInfo, razorDocument.Id, position, cancellationToken),
            cancellationToken).ConfigureAwait(false);
 
        return data.Result;
    }
 
    internal TestAccessor GetTestAccessor() => new(this);
 
    internal readonly struct TestAccessor(CohostDataTipRangeEndpoint instance)
    {
        public Task<VSInternalDataTip?> HandleRequestAsync(TextDocument razorDocument, Position position, CancellationToken cancellationToken)
            => instance.HandleRequestAsync(razorDocument, position, cancellationToken);
    }
}