// 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 Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace Microsoft.CodeAnalysis.CSharp.QuickInfo;

internal static class CSharpDiagnosticAnalyzerQuickInfoProviderExtensions
{
    public static string? ToStringOrNull(this LocalizableString @this)
    {
        var result = @this.ToString();
        if (string.IsNullOrWhiteSpace(result))
        {
            return null;
        }

        return result;
    }

    public static bool IsSuppressMessageAttribute(this NameSyntax? name)
    {
        if (name == null)
        {
            return false;
        }

        var nameValue = name.GetNameToken().ValueText;
        var stringComparer = StringComparer.Ordinal;
        return
            stringComparer.Equals(nameValue, nameof(SuppressMessageAttribute)) ||
            stringComparer.Equals(nameValue, "SuppressMessage");
    }

    public static string ExtractErrorCodeFromCheckId(this string checkId)
    {
        // checkId short and long name rules:
        // https://docs.microsoft.com/en-us/visualstudio/code-quality/in-source-suppression-overview?view=vs-2019#suppressmessage-attribute
        var position = checkId.IndexOf(':');
        var errorCode = position == -1
            ? checkId
            : checkId[..position];
        errorCode = errorCode.Trim();
        return errorCode;
    }
}