using System.Linq;

using SabreTools.Library.DatFiles;

#if MONO
using System.IO;
#else
using Alphaleonis.Win32.Filesystem;

using Stream = System.IO.Stream;
#endif

namespace SabreTools.Library.Reports
{
	/// <summary>
	/// Separated-Value report format
	/// </summary>
	public class SeparatedValue : BaseReport
	{
		private char _separator;

		/// <summary>
		/// Create a new report from the input DatFile and the filename
		/// </summary>
		/// <param name="datfile">DatFile to write out statistics for</param>
		/// <param name="filename">Name of the file to write out to</param>
		/// <param name="separator">Separator character to use in output</param>
		/// <param name="baddumpCol">True if baddumps should be included in output, false otherwise</param>
		/// <param name="nodumpCol">True if nodumps should be included in output, false otherwise</param>
		public SeparatedValue(DatFile datfile, string filename, char separator, bool baddumpCol = false, bool nodumpCol = false)
			: base(datfile, filename, baddumpCol, nodumpCol)
		{
			_separator = separator;
		}

		/// <summary>
		/// Create a new report from the input DatFile and the stream
		/// </summary>
		/// <param name="datfile">DatFile to write out statistics for</param>
		/// <param name="stream">Output stream to write to</param>
		/// <param name="separator">Separator character to use in output</param>
		/// <param name="baddumpCol">True if baddumps should be included in output, false otherwise</param>
		/// <param name="nodumpCol">True if nodumps should be included in output, false otherwise</param>
		public SeparatedValue(DatFile datfile, Stream stream, char separator, bool baddumpCol = false, bool nodumpCol = false)
			: base(datfile, stream, baddumpCol, nodumpCol)
		{
			_separator = separator;
		}

		/// <summary>
		/// Write the report to file
		/// </summary>
		/// <param name="game">Number of games to use, -1 means use the number of keys</param>
		public override void Write(long game = -1)
		{
			string line = string.Format("\"" + _datFile.FileName + "\"{0}"
					+ "\"" + _datFile.TotalSize + "\"{0}"
					+ "\"" + (game == -1 ? _datFile.Keys.Count() : game) + "\"{0}"
					+ "\"" + _datFile.RomCount + "\"{0}"
					+ "\"" + _datFile.DiskCount + "\"{0}"
					+ "\"" + _datFile.CRCCount + "\"{0}"
					+ "\"" + _datFile.MD5Count + "\"{0}"
					+ "\"" + _datFile.SHA1Count + "\"{0}"
					+ "\"" + _datFile.SHA256Count + "\"{0}"
					+ "\"" + _datFile.SHA384Count + "\"{0}"
					+ "\"" + _datFile.SHA512Count + "\""
					+ (_baddumpCol ? "{0}\"" + _datFile.BaddumpCount + "\"" : "")
					+ (_nodumpCol ? "{0}\"" + _datFile.BaddumpCount + "\"" : "")
					+ "\n", _separator);
			
			_writer.Write(line);
			_writer.Flush();
		}

		/// <summary>
		/// Write out the header to the stream, if any exists
		/// </summary>
		public override void WriteStatsHeader()
		{
			_writer.Write(string.Format("\"File Name\"{0}\"Total Size\"{0}\"Games\"{0}\"Roms\"{0}\"Disks\"{0}\"# with CRC\"{0}\"# with MD5\"{0}\"# with SHA-1\"{0}\"# with SHA-256\""
				+ (_baddumpCol ? "{0}\"BadDumps\"" : "") + (_nodumpCol ? "{0}\"Nodumps\"" : "") + "\n", _separator));
			_writer.Flush();
		}

		/// <summary>
		/// Write out the mid-header to the stream, if any exists
		/// </summary>
		public override void WriteStatsMidHeader()
		{
			// This call is a no-op for separated value formats
		}

		/// <summary>
		/// Write out the separator to the stream, if any exists
		/// </summary>
		public override void WriteStatsMidSeparator()
		{
			// This call is a no-op for separated value formats
		}

		/// <summary>
		/// Write out the footer-separator to the stream, if any exists
		/// </summary>
		public override void WriteStatsFooterSeparator()
		{
			_writer.Write("\n");
			_writer.Flush();
		}

		/// <summary>
		/// Write out the footer to the stream, if any exists
		/// </summary>
		public override void WriteStatsFooter()
		{
			// This call is a no-op for separated value formats
		}
	}
}