// 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;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Internal.Log;
using Microsoft.CodeAnalysis.Remote;

namespace Microsoft.CodeAnalysis.FindSymbols;

public static partial class SymbolFinder
{
    internal static async Task FindLiteralReferencesAsync(
       object value,
       TypeCode typeCode,
       Solution solution,
       IStreamingFindLiteralReferencesProgress progress,
       CancellationToken cancellationToken)
    {
        using (Logger.LogBlock(FunctionId.FindReference, cancellationToken))
        {
            var client = await RemoteHostClient.TryGetClientAsync(solution.Services, cancellationToken).ConfigureAwait(false);
            if (client != null)
            {
                // Create a callback that we can pass to the server process to hear about the 
                // results as it finds them.  When we hear about results we'll forward them to
                // the 'progress' parameter which will then update the UI.
                var serverCallback = new FindLiteralsServerCallback(solution, progress);

                _ = await client.TryInvokeAsync<IRemoteSymbolFinderService>(
                    solution,
                    (service, solutionInfo, callbackId, cancellationToken) => service.FindLiteralReferencesAsync(solutionInfo, callbackId, value, typeCode, cancellationToken),
                    serverCallback,
                    cancellationToken).ConfigureAwait(false);
            }
            else
            {
                await FindLiteralReferencesInCurrentProcessAsync(value, solution, progress, cancellationToken).ConfigureAwait(false);
            }
        }
    }

    internal static Task FindLiteralReferencesInCurrentProcessAsync(
        object value, Solution solution,
        IStreamingFindLiteralReferencesProgress progress,
        CancellationToken cancellationToken)
    {
        var engine = new FindLiteralsSearchEngine(solution, progress, value);
        return engine.FindReferencesAsync(cancellationToken);
    }
}