using System;
using System.IO;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace AdjustBuildRevision
{
	class Program
	{
		static void Main(string[] args)
		{
			// args[0] - FileName
			try
			{
				FileInfo fi = new FileInfo(args[0]);
				DateTime dtLatest = GetLatestDateTime(fi.Directory.Parent,fi.LastWriteTime);
				if (fi.Exists)
				{
					StreamReader sr = fi.OpenText();
					string content = sr.ReadToEnd();
					sr.Close();
					string[] seps = { "\r\n" };
					string[] lines = content.Split(seps, StringSplitOptions.None);
					bool changed = false;
					for (int i = 0; i < lines.Length;i++ )
					{
						string line = lines[i];
						string outline = line;
						if (line.Contains("AssemblyVersion") || line.Contains("AssemblyFileVersion"))
						{
							// Allow for setting build revision on either proms or the roeditor:
							if (Directory.GetCurrentDirectory().ToUpper().Contains("REFOBJ"))
								outline = Regex.Replace(line, @"([0-9]*)\.([0-9]*)\.([0-9]*)\.([0-9]*)""\)", DateTime.Now.ToString("2.4.yyMM.dHH") + "\")");
							else
								outline = Regex.Replace(line, @"([0-9]*)\.([0-9]*)\.([0-9]*)\.([0-9]*)""\)", DateTime.Now.ToString("2.3.yyMM.dHH") + "\")");
							
							if (outline != line)
							{
								Console.WriteLine("Before: '{0}'", line);
								Console.WriteLine("After:  '{0}'", outline);
								lines[i] = outline;
								changed = true;
							}
							else
							{
								Console.WriteLine("No change: '{0}'", line);
							}
						}
					}
					if (changed)
					{
						if (!fi.IsReadOnly) fi.IsReadOnly = false;
						StreamWriter sw = fi.CreateText();
						foreach (string line in lines)
							sw.WriteLine(line);
						sw.Close();
					}
				}
				else
				{
					MessageBox.Show($"File {fi.FullName} does not exist");
				}
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, ex.GetType().FullName, MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		private static DateTime GetLatestDateTime(DirectoryInfo di, DateTime dtCheck)
		{
			DateTime dtMax = dtCheck;
			FileInfo[] myFiles = di.GetFiles();
			foreach(FileInfo myFile in myFiles)
			{
				DateTime dt = myFile.LastWriteTime;
				if(dtMax < dt) dtMax = dt;
			}
			DirectoryInfo[] myFolders = di.GetDirectories();
			foreach (DirectoryInfo diChild in myFolders)
			{
				DateTime dtChild = GetLatestDateTime(diChild,dtCheck);
				if(dtChild > dtMax) dtMax = dtChild;
			}
			return dtMax;
		}
	}
}