/*
*
*   Copyright Alex 2019
*
*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <windows.h>

#include <iostream>

using std::cin;
using std::cout;

struct snake {
    int x;
    int y;
}v[100];

char board[11][11] = {
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*',
'*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*'
};

void wait(int milliseconds) {
    Sleep(milliseconds);
}

int main()
{
    srand(time(0));

    int xpos = 5, ypos = 5, snakeSize = 3;

    for (int i = 0; i < snakeSize; i++) {
        v[i].x = xpos;
        v[i].y = ypos;

        board[xpos][ypos] = 'o';

        xpos++;
        //ypos++;
    }

    int max = 10;
    int min = 0;
    int n = (rand() % (max - min + 1)) + min;
    int n2 = (rand() % (max - min + 1)) + min;

    board[n][n2] = 'x';

    for (int i = 0; i < 11; i++) {
        for (int j = 0; j < 11; j++) {
            cout << board[i][j];
            //printf("%s", board[i][j]);
        }
        cout << "\n";
        //printf("\n");
    }

    char c;

    while (true) {
        if (kbhit()) c=getch();

        board[v[snakeSize-1].x][v[snakeSize-1].y] = '*';

        if (c == 'a') {
            for (int i = snakeSize-2; i >= 0; i--) {
                v[i+1].x = v[i].x;
                v[i+1].y = v[i].y;
            }

            v[0].y--;
        } else if (c == 'd') {
            for (int i = snakeSize-2; i >= 0; i--) {
                v[i+1].x = v[i].x;
                v[i+1].y = v[i].y;
            }

            v[0].y++;
        } else if (c == 'w') {
            for (int i = snakeSize-2; i >= 0; i--) {
                v[i+1].x = v[i].x;
                v[i+1].y = v[i].y;
            }

            v[0].x--;
        } else if (c == 's') {
            for (int i = snakeSize-2; i >= 0; i--) {
                v[i+1].x = v[i].x;
                v[i+1].y = v[i].y;
            }

            v[0].x++;
        }

        board[v[0].x][v[0].y] = 'o';

        if (v[0].x < 0) {
            v[0].x = 10;
        }

        if (v[0].x > 10) {
            v[0].x = 0;
        }

        if (v[0].y < 0) {
            v[0].y = 10;
        }

        if (v[0].y > 10) {
            v[0].y = 0;
        }

        if (v[0].x == n && v[0].y == n2) {
            snakeSize++;

            v[snakeSize-1].x = v[snakeSize-2].x;
            v[snakeSize-1].y = v[snakeSize-2].y;

            board[v[snakeSize-1].x][v[snakeSize-1].y] = 'o';

            n = (rand() % (max - min + 1)) + min;
            n2 = (rand() % (max - min + 1)) + min;

            for (int i = 0; i < snakeSize; i++) {
                if (n == v[i].x && n2 == v[i].y) {
                    n = (rand() % (max - min + 1)) + min;
                    n2 = (rand() % (max - min + 1)) + min;
                }
            }

            board[n][n2] = 'x';
        }

        system("cls");

        for (int i = 0; i < 11; i++) {
            for (int j = 0; j < 11; j++) {
                cout << board[i][j];
                //printf("%s", board[i][j]);
            }
            cout << "\n";
            //printf("\n");
        }

        wait(1000 / 60);
    }
    return 0;
}