using System;
using System.IO;
using BinaryObjectScanner.Interfaces;
using SharpCompress.Compressors;
using SharpCompress.Compressors.BZip2;

namespace BinaryObjectScanner.FileType
{
    /// <summary>
    /// bzip2 archive
    /// </summary>
    public class BZip2 : IExtractable
    {
        /// <inheritdoc/>
        public string Extract(string file, bool includeDebug)
        {
            if (!File.Exists(file))
                return null;

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

        /// <inheritdoc/>
        public string Extract(Stream stream, string file, bool includeDebug)
        {
            try
            {
                // Create a temp output directory
                string tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
                Directory.CreateDirectory(tempPath);

                using (BZip2Stream bz2File = new BZip2Stream(stream, CompressionMode.Decompress, true))
                {
                    string tempFile = Path.Combine(tempPath, Guid.NewGuid().ToString());
                    using (FileStream fs = File.OpenWrite(tempFile))
                    {
                        bz2File.CopyTo(fs);
                    }
                }

                return tempPath;
            }
            catch (Exception ex)
            {
                if (includeDebug) Console.WriteLine(ex);
                return null;
            }
        }
    }
}