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

using namespace std;
bool gameover;
// Buffer size
const char	WIDTH = 120,
HEIGHT = 30,

//Dirrections:
STOP = 0,
UP = 1,
RIGHT = 2,
DOWN = 3,
LEFT = 4,

//Other settings
MAX_TAIL_LENGTH = 100;

void sleep(int time)
{
	 for (int i = 0; i < time * 10000; ++i)
	{
		cos(i);
	}

}

typedef struct
{
	char	x,
		y;
}Point;

inline void printBorder(char* screenBuffer)
{
	int score = 0;

	    for (int i = 0; i < 61; ++i)
	 {
       screenBuffer[i] = 178;

	 }
	   for (int i = 0; i < HEIGHT * WIDTH; i += 120)
	{
		  screenBuffer[i + 60] = screenBuffer[i] = 178;

	}
      for (int i = (HEIGHT * WIDTH)-120; i <( HEIGHT * WIDTH)-60; i++)
  	{
      screenBuffer[i] =178;
 	}

}


int main()
{
	char* screenBuffer = new char[HEIGHT * WIDTH];

	Point tail[MAX_TAIL_LENGTH];

	unsigned short tailLength = 0;

	char	xPos = 20,
		yPos = 15,
		xFruitPos = rand() % 59,
		yFruitPos = rand() % 29;

	int score = 0;

	DWORD dword = 0;
	HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE);

	char dirrection = STOP;

	CONSOLE_CURSOR_INFO cursorInfo;
	GetConsoleCursorInfo(out, &cursorInfo);
	cursorInfo.bVisible = false;
	SetConsoleCursorInfo(out, &cursorInfo);

	while (!gameover)
	{
		for (int i = 0; i < HEIGHT * WIDTH; ++i)
		{
			screenBuffer[i] = '\0';
		}
		screenBuffer[yFruitPos * 120 + xFruitPos] = 'O';
		screenBuffer[yPos * 120 + xPos] = 'S';
     //cout << "Score:" << score << endl;
		printBorder(screenBuffer);


		for (int i = 0; i < tailLength; ++i)
		{
			screenBuffer[tail[i].y * 120 + tail[i].x] = 's';
		}
		WriteConsoleOutputCharacterA(out, screenBuffer, WIDTH * HEIGHT, { 0,0 }, &dword);

		if (yFruitPos == yPos && xFruitPos == xPos)
		{
			xFruitPos = rand() % 59,
				yFruitPos = rand() % 29;
			score +=5;
			tail[tailLength].x = xPos;
			tail[tailLength].y = yPos;
			++tailLength;

		}
		else
		{
			for (int i = 0; i < tailLength - 1; ++i)
			{
				tail[i] = tail[i + 1];
			}
			tail[tailLength - 1].x = xPos;
			tail[tailLength - 1].y = yPos;
		}

		if (_kbhit())
		{
			char key = _getch();
			switch (key)
			{
			case 97:
				dirrection = LEFT;
				break;
			case 100:
				dirrection = RIGHT;
				break;
			case 115:
				dirrection = DOWN;
				break;
			case 119:
				dirrection = UP;
				break;
			}
		}

		switch (dirrection)
		{

		case LEFT:
			if (xPos > 0) --xPos;
			break;
		case RIGHT:
			if (xPos < 60) ++xPos;
			break;
		case DOWN:
			if (yPos < 29) ++yPos;
			break;
		case UP:
			if (yPos > 0) --yPos;
			break;

		}
		 if (xPos < 1)
		 {
			 xPos = 58;
		 }
		 else if (xPos > 59)
		 {
			 xPos = 1;
		 }

		if (yPos < 1)
		{
			yPos = 27;
		}
		else if (yPos >28)
		{
			yPos = 1;
		}

		for (int i = 0; i < tailLength - 1; ++i)
		{
			if (tail[tailLength].x == xPos && tail[tailLength].y == yPos)
				gameover = true;
		}

	 	sleep(120);
	}

 getchar();
	return 0;
}