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

using System;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Operations;

namespace Microsoft.AspNetCore.Mvc.Analyzers
{
    [DiagnosticAnalyzer(LanguageNames.CSharp)]
    public class AvoidHtmlPartialAnalyzer : ViewFeatureAnalyzerBase
    {
        public AvoidHtmlPartialAnalyzer()
            : base(DiagnosticDescriptors.MVC1000_HtmlHelperPartialShouldBeAvoided)
        {
        }

        protected override void InitializeWorker(ViewFeaturesAnalyzerContext analyzerContext)
        {
            analyzerContext.Context.RegisterOperationAction(context =>
            {
                var method = ((IInvocationOperation)context.Operation).TargetMethod;
                if (!analyzerContext.IsHtmlHelperExtensionMethod(method))
                {
                    return;
                }

                if (string.Equals(SymbolNames.PartialMethod, method.Name, StringComparison.Ordinal))
                {
                    context.ReportDiagnostic(Diagnostic.Create(
                        SupportedDiagnostic,
                        context.Operation.Syntax.GetLocation(),
                        new[] { SymbolNames.PartialMethod }));
                }
                else if (string.Equals(SymbolNames.RenderPartialMethod, method.Name, StringComparison.Ordinal))
                {
                    context.ReportDiagnostic(Diagnostic.Create(
                        SupportedDiagnostic,
                        context.Operation.Syntax.GetLocation(),
                        new[] { SymbolNames.RenderPartialMethod }));
                }
            }, OperationKind.Invocation);
        }
    }
}
