using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using BurnOutSharp.Interfaces;
using BurnOutSharp.Wrappers;

namespace BurnOutSharp.PackerType
{
    // TODO: Add extraction
    public class NSIS : IPortableExecutableCheck, IScannable
    {
        /// <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;

            string description = pex.AssemblyDescription;
            if (!string.IsNullOrWhiteSpace(description) && description.StartsWith("Nullsoft Install System"))
                return $"NSIS {description.Substring("Nullsoft Install System".Length).Trim()}";

            // Get the .data/DATA section strings, if they exist
            List<string> strs = pex.GetFirstSectionStrings(".data") ?? pex.GetFirstSectionStrings("DATA");
            if (strs != null)
            {
                if (strs.Any(s => s.Contains("NullsoftInst")))
                    return "NSIS";
            }

            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;
        }
    }
}