using System.Collections.Generic;
using System.Linq;
using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace wvdet.CodeChecker
{
    public class CheckNamespace : ICheckable
    {
        private static List<string> Forbiddens = new List<string>()
        {
            //针对于禁用的命名空间放在此处
           // "System.Linq",
           
        };

        public List<Detail> Check(string filepath, CompilationUnitSyntax root)
        {
            var results = new List<Detail>();

            var usings = root.DescendantNodes().OfType<UsingDirectiveSyntax>();
            foreach (var us in usings)
            {
                var ns = us.Name.ToString();
                if (Forbiddens.Contains(ns))
                {
                    results.Add(new Detail
                    {
                        level = Level.Error,
                        line = us.GetLocation().GetLineSpan().StartLinePosition.Line + 1,
                        guideline = $"禁用此命名空间：{ns}",
                    });
                }
            }

            return results;
        }
    }
}