using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Linq;

namespace Volian.Base.Library
{
	public static class ExeInfo
	{
		#region Log4Net
		private static readonly log4net.ILog _MyLog = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
		#endregion
		public static string GetROEditorPath()
		{
			string roapp = PROMSExecutableFolderPath() + @"\ROEDITOR.EXE";
			return roapp;
		}

		// returns the path to the executable folder
		public static string PROMSExecutableFolderPath()
		{
			string pathPROMSexe = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
			if (pathPROMSexe[7] == ':') // either a local drive or a mapped network drive
				pathPROMSexe = pathPROMSexe.Substring(6);
			else
				pathPROMSexe = @"\" + pathPROMSexe.Substring(5); // non-mapped network drive - need to add extra back slash in front
			return pathPROMSexe;
		}

		// C2022-030 get the version of PROMSFixes associated with this execuable
		public static string GetAssocicatedPROMSFixesVersion()
		{
			try
			{
				// Build the path to the PROMSFixes.sql file located in the PROMS exe folder
				string pathPROMSFixes = PROMSExecutableFolderPath() + @"\PROMSFixes.sql";

				// open the PROMSFixes.sql file and grab the line of text containing the PROMSFixes RevDate
				// using Linq to open and read the PROMSFixes file
				// it returns a list of lines. we look at only the first one (should only be one of these in PROMSFixes)
				var lines = from text in File.ReadLines(pathPROMSFixes)
						   where text.Contains("set @RevDate =")
						   select new
						   {
							   Text = text
						   };
				var txt = lines.First(); // get the first line of text where "set @RevDate =" was found
				string dtstring = txt.Text; // this is the actual text line
				// Parse out the date/time text that follows "set @RevDate ="
				int idx = dtstring.IndexOf('=') + 3;
				dtstring = dtstring.Substring(idx);
				dtstring = dtstring.Substring(0, dtstring.IndexOf("'"));
				// convert the parsed date/time text string to a DateTime and string format it to yyMM.ddHH like used in Help About
				string rtnStr = string.Format("{0:yyMM.ddHH}", DateTime.Parse(dtstring));
				return rtnStr; // return the PROMSFixes version date stored in the PROMSFixes.sql file that's in the PROMS exe folder
			}
			catch (Exception ex)
			{
				_MyLog.ErrorFormat("GetAssociatedPROMSFixesVersion - {0}", ex.Message);
				return null; // return null to signal that we could not find or parse the PROMSFixes version date
			}	
		}

	}
}