public Tuple <char, int> GetBattleAreaCoordinates(string input)
        {
            if (string.IsNullOrEmpty(input))
            {
                throw new Exception(ErrorMessage.BattleAreaMessage);
            }

            var arr = input.Split(' ');

            if (arr != null &&
                (arr.Length > 2 ||
                 arr.Length < 2 ||
                 !BattleShipHelper.IsNumber(arr[0]) ||
                 !BattleShipHelper.IsCharacter(arr[1])))
            {
                throw new Exception(ErrorMessage.BattleAreaMessage);
            }

            return(new Tuple <char, int>(BattleShipHelper.GetCharacter(arr[1]), BattleShipHelper.GetNumber(arr[0])));
        }
        public int GetNumberofPlayers(string input)
        {
            if (string.IsNullOrEmpty(input))
            {
                throw new Exception(ErrorMessage.NumberofPlayerMessage);
            }

            if (!BattleShipHelper.IsNumber(input))
            {
                throw new Exception(ErrorMessage.NumberofPlayerMessage);
            }

            int number = BattleShipHelper.GetNumber(input);

            if (number != 2)
            {
                throw new Exception(ErrorMessage.NumberofPlayerMessage);
            }

            return(number);
        }
        public Tuple <ShipType, int, int, string> GetShipType(string input)
        {
            if (string.IsNullOrEmpty(input))
            {
                throw new Exception(ErrorMessage.ShipTypeMessage);
            }

            var arr = input.Split(' ');

            if (arr != null && (arr.Length < 5 || !BattleShipHelper.IsCharacter(arr[0]) || !BattleShipHelper.IsNumber(arr[1]) || !BattleShipHelper.IsNumber(arr[2])))
            {
                throw new Exception(ErrorMessage.ShipTypeMessage);
            }

            var shipType       = (ShipType)BattleShipHelper.GetCharacter(arr[0]);
            var numberOfShips  = BattleShipHelper.GetNumber(arr[1]);
            var numberOfShips1 = BattleShipHelper.GetNumber(arr[2]);
            var shipAreas      = string.Join(" ", arr.Skip(3));

            return(new Tuple <ShipType, int, int, string>(shipType, numberOfShips, numberOfShips1, shipAreas));
        }