using System.Collections.Concurrent;
using System.IO;
using BurnOutSharp.ExecutableType.Microsoft.PE;
using BurnOutSharp.Interfaces;

namespace BurnOutSharp.PackerType
{
    // TODO: Add extraction
    public class Shrinker : IPortableExecutableCheck, IScannable
    {
        /// <inheritdoc/>
        public bool ShouldScan(byte[] magic) => true;

        /// <inheritdoc/>
        public string CheckPortableExecutable(string file, PortableExecutable pex, bool includeDebug)
        {
            // Get the sections from the executable, if possible
            var sections = pex?.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/>
        public ConcurrentDictionary<string, ConcurrentQueue<string>> Scan(Scanner scanner, string file)
        {
            if (!File.Exists(file))
                return null;

            using (var fs = File.OpenRead(file))
            {
                return Scan(scanner, fs, file);
            }
        }

        /// <inheritdoc/>
        public ConcurrentDictionary<string, ConcurrentQueue<string>> Scan(Scanner scanner, Stream stream, string file)
        {
            return null;
        }
    }
}