// 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.Generic;
using System.Composition;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Snippets;
using Microsoft.CodeAnalysis.Snippets.SnippetProviders;
 
namespace Microsoft.CodeAnalysis.CSharp.Snippets;
 
[ExportSnippetProvider(nameof(ISnippetProvider), LanguageNames.CSharp), Shared]
[method: ImportingConstructor]
[method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
internal sealed class CSharpClassSnippetProvider()
    : AbstractCSharpTypeSnippetProvider<ClassDeclarationSyntax>(TypeKind.Class)
{
    private static readonly ISet<SyntaxKind> s_validModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
    {
        SyntaxKind.NewKeyword,
        SyntaxKind.PublicKeyword,
        SyntaxKind.ProtectedKeyword,
        SyntaxKind.InternalKeyword,
        SyntaxKind.PrivateKeyword,
        SyntaxKind.AbstractKeyword,
        SyntaxKind.SealedKeyword,
        SyntaxKind.StaticKeyword,
        SyntaxKind.UnsafeKeyword,
        SyntaxKind.FileKeyword,
    };
 
    public override string Identifier => CSharpSnippetIdentifiers.Class;
 
    public override string Description => FeaturesResources.class_;
 
    protected override ISet<SyntaxKind> ValidModifiers => s_validModifiers;
 
    protected override ClassDeclarationSyntax TypeDeclaration(string name)
        => SyntaxFactory.ClassDeclaration(name);
}