using System;
using System.Collections.Generic;

using SabreTools.Library.Data;
using SabreTools.Library.DatItems;

#if MONO
using System.IO;
#else
using MemoryStream = System.IO.MemoryStream;
using Stream = System.IO.Stream;
#endif

namespace SabreTools.Library.FileTypes
{
	/// <summary>
	/// Represents a TorrentLRZip archive for reading and writing
	/// </summary>
	/// TODO: Implement from source at https://github.com/lz4/lz4
	public class LZ4Archive : BaseArchive
	{
		#region Constructors

		/// <summary>
		/// Create a new LZ4Archive with no base file
		/// </summary>
		public LZ4Archive()
			: base()
		{
		}

		/// <summary>
		/// Create a new LZ4Archive from the given file
		/// </summary>
		/// <param name="filename">Name of the file to use as an archive</param>
		public LZ4Archive(string filename)
			: base(filename)
		{
			//_archiveType = ArchiveType.LRZip;
		}

		#endregion

		#region Extraction

		/// <summary>
		/// Attempt to extract a file as an archive
		/// </summary>
		/// <param name="outDir">Output directory for archive extraction</param>
		/// <returns>True if the extraction was a success, false otherwise</returns>
		public override bool ExtractAll(string outDir)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Attempt to extract a file from an archive
		/// </summary>
		/// <param name="entryName">Name of the entry to be extracted</param>
		/// <param name="outDir">Output directory for archive extraction</param>
		/// <returns>Name of the extracted file, null on error</returns>
		public override string ExtractEntry(string entryName, string outDir)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Attempt to extract a stream from an archive
		/// </summary>
		/// <param name="entryName">Name of the entry to be extracted</param>
		/// <param name="realEntry">Output representing the entry name that was found</param>
		/// <returns>MemoryStream representing the entry, null on error</returns>
		public override (MemoryStream, string) ExtractEntryStream(string entryName)
		{
			throw new NotImplementedException();
		}

		#endregion

		#region Information

		/// <summary>
		/// Generate a list of DatItem objects from the header values in an archive
		/// </summary>
		/// <param name="omitFromScan">Hash representing the hashes that should be skipped</param>
		/// <param name="date">True if entry dates should be included, false otherwise (default)</param>
		/// <returns>List of DatItem objects representing the found data</returns>
		/// <remarks>TODO: All instances of Hash.DeepHashes should be made into 0x0 eventually</remarks>
		public override List<Rom> GetArchiveFileInfo(Hash omitFromScan = Hash.DeepHashes, bool date = false)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Generate a list of empty folders in an archive
		/// </summary>
		/// <param name="input">Input file to get data from</param>
		/// <returns>List of empty folders in the archive</returns>
		public override List<string> GetEmptyFolders()
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Check whether the input file is a standardized format
		/// </summary>
		public override bool IsTorrent()
		{
			throw new NotImplementedException();
		}

		#endregion

		#region Writing

		/// <summary>
		/// Write an input file to a torrent LZ4 file
		/// </summary>
		/// <param name="inputFile">Input filename to be moved</param>
		/// <param name="outDir">Output directory to build to</param>
		/// <param name="rom">DatItem representing the new information</param>
		/// <param name="date">True if the date from the DAT should be used if available, false otherwise (default)</param>
		/// <param name="romba">True if files should be output in Romba depot folders, false otherwise</param>
		/// <returns>True if the write was a success, false otherwise</returns>
		/// <remarks>This works for now, but it can be sped up by using Ionic.Zip or another zlib wrapper that allows for header values built-in. See edc's code.</remarks>
		public override bool Write(string inputFile, string outDir, Rom rom, bool date = false, bool romba = false)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Write an input stream to a torrent LZ4 file
		/// </summary>
		/// <param name="inputStream">Input stream to be moved</param>
		/// <param name="outDir">Output directory to build to</param>
		/// <param name="rom">DatItem representing the new information</param>
		/// <param name="date">True if the date from the DAT should be used if available, false otherwise (default)</param>
		/// <param name="romba">True if files should be output in Romba depot folders, false otherwise</param>
		/// <returns>True if the write was a success, false otherwise</returns>
		/// <remarks>This works for now, but it can be sped up by using Ionic.Zip or another zlib wrapper that allows for header values built-in. See edc's code.</remarks>
		public override bool Write(Stream inputStream, string outDir, Rom rom, bool date = false, bool romba = false)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Write a set of input files to a torrent LZ4 archive (assuming the same output archive name)
		/// </summary>
		/// <param name="inputFiles">Input files to be moved</param>
		/// <param name="outDir">Output directory to build to</param>
		/// <param name="rom">DatItem representing the new information</param>
		/// <param name="date">True if the date from the DAT should be used if available, false otherwise (default)</param>
		/// <param name="romba">True if files should be output in Romba depot folders, false otherwise</param>
		/// <returns>True if the archive was written properly, false otherwise</returns>
		public override bool Write(List<string> inputFiles, string outDir, List<Rom> roms, bool date = false, bool romba = false)
		{
			throw new NotImplementedException();
		}

		#endregion
	}
}