// 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.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.Editor;
using Microsoft.VisualStudio.ComponentModelHost;
using Microsoft.VisualStudio.LanguageServices.Implementation;
using Microsoft.VisualStudio.Shell.Interop;
 
namespace Microsoft.VisualStudio.LanguageServices.CSharp.LanguageService;
 
[ExcludeFromCodeCoverage]
[Guid(Guids.CSharpEditorFactoryIdString)]
internal sealed class CSharpEditorFactory(IComponentModel componentModel) : AbstractEditorFactory(componentModel)
{
    protected override string ContentTypeName => ContentTypeNames.CSharpContentType;
    protected override string LanguageName => LanguageNames.CSharp;
 
    protected override Project GetProjectWithCorrectParseOptionsForProject(Project project, IVsHierarchy hierarchy)
    {
        if (project.ParseOptions is CSharpParseOptions parseOptions &&
            hierarchy is IVsBuildPropertyStorage propertyStorage &&
            ErrorHandler.Succeeded(propertyStorage.GetPropertyValue("LangVersion", null, (uint)_PersistStorageType.PST_PROJECT_FILE, out var langVersionString)) &&
            LanguageVersionFacts.TryParse(langVersionString, out var langVersion))
        {
            return project.WithParseOptions(parseOptions.WithLanguageVersion(langVersion));
        }
 
        return project;
    }
}