// 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.Linq;
using System.Text;
using System.Threading;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Host;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Text;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Serialization
{
    /// <summary>
    /// serialize and deserialize objects to stream.
    /// some of these could be moved into actual object, but putting everything here is a bit easier to find I believe.
    /// </summary>
    internal partial class SerializerService
    {
        public void SerializeSourceText(SerializableSourceText text, ObjectWriter writer, SolutionReplicationContext context, CancellationToken cancellationToken)
        {
            text.Serialize(writer, context, cancellationToken);
        }
 
        private SourceText DeserializeSourceText(ObjectReader reader, CancellationToken cancellationToken)
        {
            var serializableSourceText = SerializableSourceText.Deserialize(reader, _storageService, _textService, cancellationToken);
            return serializableSourceText.GetText(cancellationToken);
        }
 
        public void SerializeCompilationOptions(CompilationOptions options, ObjectWriter writer, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
 
            var language = options.Language;
 
            // TODO: once compiler team adds ability to serialize compilation options to ObjectWriter directly, we won't need this.
            writer.WriteString(language);
 
            var service = GetOptionsSerializationService(language);
            service.WriteTo(options, writer, cancellationToken);
        }
 
        private CompilationOptions DeserializeCompilationOptions(ObjectReader reader, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
 
            var language = reader.ReadString();
 
            var service = GetOptionsSerializationService(language);
            return service.ReadCompilationOptionsFrom(reader, cancellationToken);
        }
 
        public void SerializeParseOptions(ParseOptions options, ObjectWriter writer)
        {
            var language = options.Language;
 
            // TODO: once compiler team adds ability to serialize parse options to ObjectWriter directly, we won't need this.
            writer.WriteString(language);
 
            var service = GetOptionsSerializationService(language);
            service.WriteTo(options, writer);
        }
 
        private ParseOptions DeserializeParseOptions(ObjectReader reader, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
 
            var language = reader.ReadString();
 
            var service = GetOptionsSerializationService(language);
            return service.ReadParseOptionsFrom(reader, cancellationToken);
        }
 
        public void SerializeProjectReference(ProjectReference reference, ObjectWriter writer, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
 
            reference.ProjectId.WriteTo(writer);
            writer.WriteValue(reference.Aliases.ToArray());
            writer.WriteBoolean(reference.EmbedInteropTypes);
        }
 
        private static ProjectReference DeserializeProjectReference(ObjectReader reader, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
 
            var projectId = ProjectId.ReadFrom(reader);
            var aliases = reader.ReadArray<string>();
            var embedInteropTypes = reader.ReadBoolean();
 
            return new ProjectReference(projectId, aliases.ToImmutableArrayOrEmpty(), embedInteropTypes);
        }
 
        public void SerializeMetadataReference(MetadataReference reference, ObjectWriter writer, SolutionReplicationContext context, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
            WriteMetadataReferenceTo(reference, writer, context, cancellationToken);
        }
 
        private MetadataReference DeserializeMetadataReference(ObjectReader reader, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
            return ReadMetadataReferenceFrom(reader, cancellationToken);
        }
 
        public void SerializeAnalyzerReference(AnalyzerReference reference, ObjectWriter writer, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
            WriteAnalyzerReferenceTo(reference, writer, cancellationToken);
        }
 
        private AnalyzerReference DeserializeAnalyzerReference(ObjectReader reader, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
            return ReadAnalyzerReferenceFrom(reader, cancellationToken);
        }
    }
}