#include <iostream>
#include <conio.h>
#include <windows.h> 

using namespace std;


bool gameOwer;
const int width = 20, height = 20;
int x, y, fruitX, fruitY, score;
int tailX[100], tailY[100];
int nteil;
enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN };

eDirection dir;

void Setup()
{
	gameOwer = false;

	dir = STOP;
	x = width % 2;
	y = height % 2;
	fruitX = rand() % width;
	fruitY = rand() % height;
	score = 0;
	nteil = 0;
}

void Draw()
{
	system("cls");
	for (int i = 0; i <= width; i++)
		cout << "#";

	cout << endl;

	for (int i = 0; i < height; i++)
	{
		for (int j = 0; j < width; j++)
		{
			if (j == 0 || j == width - 1)
				cout << "#";
			if (i == y && j == x)
				cout << '0';
			else if (i == fruitY && j == fruitX)
				cout << "f";
			else
			{
				bool print = false;
				for (int k = 0; k < nteil; k++)
				{
					if (tailX[k] == j && tailY[k] == i)
					{
						print = true;
						cout << "o";

					}

				}
				if (!print)
				{
					cout << " ";

				}
			}

		}
		cout << endl;

	}

	for (int i = 0; i <= width; i++)
	{
		cout << "#";

	}
	cout << endl;


}

void Input()
{
	if (_kbhit())
	{
		switch (_getch())
		{
		case 'a':
			if (dir != RIGHT)
			{
				dir = LEFT;
			};
			break;
		case 'd':
			if (dir != LEFT)
			{
				dir = RIGHT;
			};
			break;
		case 'w':
			if (dir != DOWN)
			{
				dir = UP;
			};
			break;
		case 's':
			if (dir != UP)
			{
				dir = DOWN;
			}
			break;
		case 'x':
			gameOwer = true;
			break;
		}
	}
}

void Logic()
{
	int prevX = tailX[0];
	int prevY = tailY[0];

	int prev2X, prev2Y;
	tailX[0] = x;
	tailY[0] = y;

	for (int i = 1; i < nteil; i++)
	{
		prev2X = tailX[i];
		prev2Y = tailY[i];
		tailX[i] = prevX;
		tailY[i] = prevY;
		prevX = prev2X;
		prevY = prev2Y;


	}

	switch (dir)
	{
	case LEFT:
		x--;
		break;
	case RIGHT:
		x++;
		break;
	case UP:
		y--;
		break;
	case DOWN:
		y++;
		break;
	}

	//if (x > width || x < 0 || y > height || y < 0)
	//	gameOwer = true;

	if (x >= width - 1)
		x = 0;
	else if (x < 0)
		x = width - 1;
	if (y >= height)
		y = 0;
	else if (y < 0)
		y = height - 1;

	for (int i = 0; i < nteil; i++)
	{
		if (tailX[i] == x && tailY[i] == y)

			gameOwer = true;
	}

	if (x > fruitX && y == fruitY)
	{

		score += 10;
		fruitX = rand() % (width - 2);
		fruitY = rand() % (height - 3);
		nteil++;
	}
	cout << "Score: " << score << endl;


}

int main()
{
	Setup();
	while (!gameOwer)
	{
		Draw();
		Input();
		Logic();
		Sleep(40);
	}
	return 0;
}