using System.IO;
using BinaryObjectScanner.Interfaces;
using SabreTools.Serialization.Wrappers;

namespace BinaryObjectScanner.Packer
{
    // TODO: Add extraction
    // https://raw.githubusercontent.com/wolfram77web/app-peid/master/userdb.txt
    public class Shrinker : IExtractable, IPortableExecutableCheck
    {
        /// <inheritdoc/>
#if NET48
        public string CheckPortableExecutable(string file, PortableExecutable pex, bool includeDebug)
#else
        public string? CheckPortableExecutable(string file, PortableExecutable pex, bool includeDebug)
#endif
        {
            // Get the sections from the executable, if possible
            var sections = pex.Model.SectionTable;
            if (sections == null)
                return null;

            // Get the .shrink0 and .shrink2 sections, if they exist -- TODO: Confirm if both are needed or either/or is fine
            bool shrink0Section = pex.ContainsSection(".shrink0", true);
            bool shrink2Section = pex.ContainsSection(".shrink2", true);
            if (shrink0Section || shrink2Section)
                return "Shrinker";

            return null;
        }

        /// <inheritdoc/>
#if NET48
        public string Extract(string file, bool includeDebug)
#else
        public string? Extract(string file, bool includeDebug)
#endif
        {
            if (!File.Exists(file))
                return null;

            using (var fs = File.Open(file, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                return Extract(fs, file, includeDebug);
            }
        }

        /// <inheritdoc/>
#if NET48
        public string Extract(Stream stream, string file, bool includeDebug)
#else
        public string? Extract(Stream stream, string file, bool includeDebug)
#endif
        {
            return null;
        }
    }
}