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

namespace _2D命令行小游戏Beta1_0
{
    class Game
    {
        public Game(int scale)
        {
            _scale = scale;
            peox = 1;
            peoy = 1;
            map = new int[_scale, _scale];
            for (int i = 0; i < _scale; i++)
            {
                map[0, i] = 1;
                map[_scale - 1, i] = 1;
                map[i, 0] = 1;
                map[i, _scale - 1] = 1;
            }
            _score = 0;
            foodx = peox;
            foody = peoy;
            spawnFood();
            direction = 0;
        }
        public void play()
        {
            disMap();
            while (true)
            {
                var k = Console.ReadKey();//System.ConsoleKeyInfo
                switch (k.KeyChar)
                {
                    case ‘w‘:
                    case ‘W‘: direction = 1; break;
                    case ‘s‘:
                    case ‘S‘: direction = 2; break;
                    case ‘a‘:
                    case ‘A‘: direction = 3; break;
                    case ‘d‘:
                    case ‘D‘: direction = 4; break;
                    case ‘e‘:
                    case ‘E‘: return;
                }
                switch (direction)
                {
                    case 1: if (peox > 1) peox--; disMap(); break;
                    case 2: if (peox < _scale - 2) peox++; disMap(); break;
                    case 3: if (peoy > 1) peoy--; disMap(); break;
                    case 4: if (peoy < _scale - 2) peoy++; disMap(); break;
                }
            }
        }
        private void disMap()
        {
            Console.Clear();
            for (int i = 0; i < _scale; i++)
            {
                for (int j = 0; j < _scale; j++)
                {
                    if (peox == foodx && peoy == foody)
                    {
                        _score += 100;
                        spawnFood();
                    }
                    if (i == peox && j == peoy)
                        Console.Write("◎");
                    else if (i == foodx && j == foody)
                        Console.Write("※");
                    else if (map[i, j] == 0)
                        Console.Write("  ");
                    else if (map[i, j] == 1)
                        Console.Write("█");
                    
                }
                Console.WriteLine();
            }
            Console.WriteLine("WSAD:move  E:exit");
            Console.WriteLine("Your score: "+_score.ToString());
        }
        private void spawnFood()
        { 
            Random rd = new Random();
            while (foodx == peox && foody == peoy) 
            {
                foodx = rd.Next(1, _scale - 1);
                foody = rd.Next(1, _scale - 1);
            }
        }
        private int peox, peoy;
        private int[,] map;// 0 empty   1 wall
        private int _scale;
        private long _score;
        private int foodx,foody;
        private int direction;
    }
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("please input scale(2<=n<=25):");
            int sca = Convert.ToInt32(Console.ReadLine());
            if(sca>=2 && sca<=25)
            {
                Game game = new Game(sca+2);
                game.play();
            }
            
        }
    }
}