Class Loggs
{
   private string path;
        private string CreateDefaultPath()
        {
            string directory = Directory.GetCurrentDirectory() + @"/Logs/" + DateTime.Now.ToShortDateString();
            string fileName = "log.txt";
            string path;
            if (!Directory.Exists(directory))
                try
                {
                    Directory.CreateDirectory(directory);
                }
                catch (IOException e)
                {
                    Console.WriteLine("Can't create folder." + e.Message);
                }
                catch (UnauthorizedAccessException e)
                {
                    Console.WriteLine("Can't create folder. Access denied." + e.Message);
                }

            path = Path.Combine(directory, fileName);
            return path;
        }
        private string CreateCustomPath(string directory, string fileName)
        {
            string path;
            string fullDirectory = directory + @"/" + DateTime.Now.ToShortDateString();

            if (IsValidFilename(fileName) && IsValidDirectory(fullDirectory))
            {
                if (!Directory.Exists(fullDirectory))
                    try
                    {
                        Directory.CreateDirectory(fullDirectory);
                    }
                    catch (IOException)
                    {
                        Console.WriteLine("Something went wrong." + e.Message);
                    }
                    catch (UnauthorizedAccessException)
                    {
                        Console.WriteLine("Can't create file or folder. Access denied." + e.Message);
                    }
            }
            else
            {
                throw new ArgumentException("Wrong name of folder or file");
            }

            path = Path.Combine(directory, fileName);
            return path;
        }
        private bool IsValidFilename(string fileName)
        {
            if (fileName.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0 || String.IsNullOrEmpty(fileName))
                return false;
            return true;
        }
        private bool IsValidDirectory(string directory)
        {
            if (directory.IndexOfAny(Path.GetInvalidPathChars()) >= 0 || String.IsNullOrEmpty(directory))
                return false;
            return true;
        }
#region constructors
        public Loggs()
        {
            path = CreateDefaultPath();
        }
        public Loggs(string directory, string fileName)
        {
            path = CreateCustomPath(directory, fileName);
        }
#endregion
}