// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Diagnostics;

namespace Microsoft.AspNetCore.Mvc.Analyzers
{
    public class ViewFeaturesAnalyzerContext
    {
#pragma warning disable RS1012 // Start action has no registered actions.
        public ViewFeaturesAnalyzerContext(CompilationStartAnalysisContext context)
#pragma warning restore RS1012 // Start action has no registered actions.
        {
            Context = context;
            HtmlHelperType = GetType(SymbolNames.IHtmlHelperType);
            HtmlHelperPartialExtensionsType = GetType(SymbolNames.HtmlHelperPartialExtensionsType);
        }

        public CompilationStartAnalysisContext Context { get; }

        public INamedTypeSymbol HtmlHelperType { get; }

        public INamedTypeSymbol HtmlHelperPartialExtensionsType { get; }

        private INamedTypeSymbol GetType(string name) => Context.Compilation.GetTypeByMetadataName(name);

        public bool IsHtmlHelperExtensionMethod(IMethodSymbol method)
        {
            if (!method.IsExtensionMethod)
            {
                return false;
            }

            if (!SymbolEqualityComparer.Default.Equals(method.ContainingType, HtmlHelperPartialExtensionsType))
            {
                return false;
            }

            return true;
        }
    }
}
