using Microsoft.VisualBasic.FileIO;

namespace Password_Manager
{
    static class ConfigFileManager
    {
#region Config flags
			/*Configuration: (format: fieldname=value)

			  password_store_path: path to the folder which contains the .gpg files
			  recipient: whose public key to use for encryption when a new password is created
			*/
			private static string CONFIGPATH = SpecialDirectories.CurrentUserApplicationData + "\\config.cfg";
			private static char DELIMETER = '=';
			private static string RECIPIENT = "recipient";
			private static string PATH = "password_store_path";
#endregion

		private static Config Configuration;

		public static void Init()
		{
            try
            {
                StreamReader sr = new StreamReader(CONFIGPATH);
			    string? path = null, recipient = null;
                if (sr != null)
                {
                    while (!sr.EndOfStream)
                    {
                        string[]? fields = sr.ReadLine().Split(DELIMETER);
                        if (fields != null)
                        {
                            if (fields[0] == PATH)
                            {
								path = fields[0];
                            }
							else if (fields[0] == RECIPIENT)
							{
								recipient = fields[0];
							}
                        }
                        else //probably an empty line or something
                        {
                            continue;
                        }
                    }

					if (path != null && recipient != null)
					{
						Configuration = new Config(path, recipient);
					}
					else
					{
						throw new InvalidConfigurationException("One or more required fileds were missing from the configuration file.");
					}
                }
                else
                {
                    throw new FileNotFoundException();
                }
            }
            catch (FileNotFoundException)
            {
                CreateDefaultConfig();
            }
            catch (IOException e)
            {
                MessageBox.Show(e.ToString(), "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
		}

        public static string GetPath()
        {
			return Configuration.PasswordStorePath;
        }

		public static string GetRecipient()
		{
			return Configuration.Recipient;
		}

        private static void CreateDefaultConfig()
        {
            try
            {
                StreamWriter sw = new StreamWriter(CONFIGPATH);
                sw.WriteLine(RECIPIENT + DELIMETER + "typo");
                sw.WriteLine(PATH + DELIMETER + @"C:\Users\Typo\pass");
                sw.Close();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}