// 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.Collections.Immutable;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Remote;
using Microsoft.CodeAnalysis.Text;

namespace Microsoft.CodeAnalysis.FindSymbols;

public static partial class SymbolFinder
{
    [ExportRemoteServiceCallbackDispatcher(typeof(IRemoteSymbolFinderService)), Shared]
    internal sealed class CallbackDispatcher : RemoteServiceCallbackDispatcher, IRemoteSymbolFinderService.ICallback
    {
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public CallbackDispatcher()
        {
        }

        private FindLiteralsServerCallback GetFindLiteralsCallback(RemoteServiceCallbackId callbackId)
            => (FindLiteralsServerCallback)GetCallback(callbackId);

        private FindReferencesServerCallback GetFindReferencesCallback(RemoteServiceCallbackId callbackId)
            => (FindReferencesServerCallback)GetCallback(callbackId);

        // references

        public ValueTask AddReferenceItemsAsync(RemoteServiceCallbackId callbackId, int count, CancellationToken cancellationToken)
            => GetFindReferencesCallback(callbackId).AddItemsAsync(count, cancellationToken);

        public ValueTask ReferenceItemsCompletedAsync(RemoteServiceCallbackId callbackId, int count, CancellationToken cancellationToken)
            => GetFindReferencesCallback(callbackId).ItemsCompletedAsync(count, cancellationToken);

        public ValueTask OnCompletedAsync(RemoteServiceCallbackId callbackId, CancellationToken cancellationToken)
            => GetFindReferencesCallback(callbackId).OnCompletedAsync(cancellationToken);

        public ValueTask OnDefinitionFoundAsync(RemoteServiceCallbackId callbackId, SerializableSymbolGroup symbolGroup, CancellationToken cancellationToken)
            => GetFindReferencesCallback(callbackId).OnDefinitionFoundAsync(symbolGroup, cancellationToken);

        public ValueTask OnReferencesFoundAsync(RemoteServiceCallbackId callbackId, ImmutableArray<(SerializableSymbolGroup group, SerializableSymbolAndProjectId definition, SerializableReferenceLocation reference)> references, CancellationToken cancellationToken)
            => GetFindReferencesCallback(callbackId).OnReferencesFoundAsync(references, cancellationToken);

        public ValueTask OnStartedAsync(RemoteServiceCallbackId callbackId, CancellationToken cancellationToken)
            => GetFindReferencesCallback(callbackId).OnStartedAsync(cancellationToken);

        // literals

        public ValueTask AddLiteralItemsAsync(RemoteServiceCallbackId callbackId, int count, CancellationToken cancellationToken)
            => GetFindLiteralsCallback(callbackId).AddItemsAsync(count, cancellationToken);

        public ValueTask LiteralItemsCompletedAsync(RemoteServiceCallbackId callbackId, int count, CancellationToken cancellationToken)
            => GetFindLiteralsCallback(callbackId).ItemsCompletedAsync(count, cancellationToken);

        public ValueTask OnLiteralReferenceFoundAsync(RemoteServiceCallbackId callbackId, DocumentId documentId, TextSpan span, CancellationToken cancellationToken)
            => GetFindLiteralsCallback(callbackId).OnLiteralReferenceFoundAsync(documentId, span, cancellationToken);
    }
}