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

namespace CSLight
{
    class Program
    {
        static void Main()
        {
            Console.CursorVisible = false;
            int userPositionX = 2;
            int userPositionY = 2;

            char[,] map =
            {
                {'#','#','#','#','#','#','#','#','#','#','#','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ','#' },
                {'#','#','#','#','#','#','#','#','#','#','#','#' }
            };

            DrawMap(map);

            while (true)
            {
                ConsoleKeyInfo consoleKeyInfo = Console.ReadKey();

                switch (consoleKeyInfo.Key)
                {
                    case ConsoleKey.UpArrow:
                        if (!CheckWall(map, userPositionX, userPositionY - 1))
                        {
                            ErasePlayer(userPositionX, userPositionY);
                            Move(ref userPositionX, ref userPositionY, 0, -1);
                            DrawPlayer(userPositionX, userPositionY, '$');
                        }
                        break;
                    case ConsoleKey.DownArrow:
                        if (!CheckWall(map, userPositionX, userPositionY + 1))
                        {
                            ErasePlayer(userPositionX, userPositionY);
                            Move(ref userPositionX, ref userPositionY, 0, 1);
                            DrawPlayer(userPositionX, userPositionY, '$');
                        }
                        break;
                    case ConsoleKey.LeftArrow:
                        if (!CheckWall(map, userPositionX - 1, userPositionY))
                        {
                            ErasePlayer(userPositionX, userPositionY);
                            Move(ref userPositionX, ref userPositionY, -1, 0);
                            DrawPlayer(userPositionX, userPositionY, '$');
                        }
                        break;
                    case ConsoleKey.RightArrow:
                        if (!CheckWall(map, userPositionX + 1, userPositionY))
                        {
                            ErasePlayer(userPositionX, userPositionY);
                            Move(ref userPositionX, ref userPositionY, 1, 0);
                            DrawPlayer(userPositionX, userPositionY, '$');
                        }
                        break;
                }
            }
        }

        static bool CheckWall(char[,] map, int coordinateX, int coordinateY)
        {
            if (map[coordinateY, coordinateX] == '#')
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        static void ErasePlayer(int positionX, int positionY)
        {
            Console.SetCursorPosition(positionX, positionY);
            Console.Write(" ");
        }

        static void DrawPlayer(int positionX, int positionY, char symbol)
        {
            Console.SetCursorPosition(positionX, positionY);
            Console.Write(symbol);
        }

        static void Move(ref int positionX, ref int positionY, int directionX, int directionY)
        {
            positionX += directionX;
            positionY += directionY;
        }

        static void DrawMap(char[,] map)
        {
            for (int i = 0; i < map.GetLength(0); i++)
            {
                for (int j = 0; j < map.GetLength(1); j++)
                {
                    Console.Write(map[i, j]);
                }
                Console.WriteLine();
            }
        }

        static int ReadInt()
        {
            int parse;

            while (true)
            {
                string userInput = Console.ReadLine();

                if (int.TryParse(userInput, out parse))
                {
                    return parse;
                }
            }
        }
    }
}