// 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.Composition;
using System.Diagnostics.CodeAnalysis;
using System.Threading;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.ConvertTypeOfToNameOf;
using Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.ConvertTypeOfToNameOf
{
    [ExportCodeFixProvider(LanguageNames.CSharp, Name = PredefinedCodeFixProviderNames.ConvertTypeOfToNameOf), Shared]
    internal class CSharpConvertTypeOfToNameOfCodeFixProvider : AbstractConvertTypeOfToNameOfCodeFixProvider<
        MemberAccessExpressionSyntax>
    {
        [ImportingConstructor]
        [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
        public CSharpConvertTypeOfToNameOfCodeFixProvider()
        {
        }

        protected override string GetCodeFixTitle()
            => CSharpCodeFixesResources.Convert_typeof_to_nameof;

        protected override SyntaxNode GetSymbolTypeExpression(SemanticModel model, MemberAccessExpressionSyntax node, CancellationToken cancellationToken)
        {
            // The corresponding analyzer (CSharpConvertTypeOfToNameOfDiagnosticAnalyzer) validated the syntax
            var typeOfExpression = (TypeOfExpressionSyntax)node.Expression;
            var typeSymbol = model.GetSymbolInfo(typeOfExpression.Type, cancellationToken).Symbol.GetSymbolType();
            Contract.ThrowIfNull(typeSymbol);
            return typeSymbol.GenerateExpressionSyntax(nameSyntax: true);
        }
    }
}
