#include <iostream>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
using namespace std;

void wait(double seconds)

{

    clock_t endwait;

    endwait = clock() + seconds * CLOCKS_PER_SEC;

    while (clock() < endwait) {}

}

void game()
{
    int heady = 5, headx = 10, lengh = 3, inp = 'a', last = 'a', score = 0;
    int mapa[21][21] = {};
    int fruity = 2, fruitx = 2;
    double delay = 0.2;

    while (true) {
        system("cls");
        if (heady == fruity && headx == fruitx) {
            lengh++;
            fruity = rand() % 10;
            fruitx = rand() % 20;
            score += 50;
            delay /= 1.05;
        }

        cout << "#######################" << endl;

        for (int i = 0; i <= 10; i++) {
            cout << "#";
            for (int j = 0; j <= 20; j++) {
                if (mapa[i][j] > 0) { mapa[i][j]--; }

                if (i == heady && j == headx) {
                    mapa[i][j] = lengh;
                }
                else if (i == fruity && j == fruitx) {
                    mapa[i][j] = -1;
                }

                if (mapa[i][j] > 0) {
                    if (mapa[i][j] % 2 == 0) { cout << "0"; }
                    if (mapa[i][j] % 2 == 1) { cout << "*"; }
                }
                else if (mapa[i][j] == -1) {
                    cout << "o";
                }
                else {
                    cout << " ";
                }
            }
            cout << "#";
            cout << endl;
        }
        cout << "#######################" << endl;
        cout << "score: " << score << endl;

        if (_kbhit() != 0) {
            inp = _getch();
            wait(delay / 2);
        }
        else { wait(delay); }

        if (inp == 's' && last != 'w') { last = 's'; }
        else if (inp == 'w' && last != 's') { last = 'w'; }
        else if (inp == 'a' && last != 'd') { last = 'a'; }
        else if (inp == 'd' && last != 'a') { last = 'd'; }

        if (last == 's') {
            if (heady == 10) {
                if (mapa[0][headx] > 1) { break; }
                heady = 0;
            }
            else {
                if (mapa[heady + 1][headx] > 1) { break; }
                heady++;
            }
        }
        else if (last == 'w') {
            if (heady == 0) {
                if (mapa[10][headx] > 1) { break; }
                heady = 10;
            }
            else {
                if (mapa[heady - 1][headx] > 1) { break; }
                heady--;
            }
        }
        else if (last == 'a') {
            if (headx == 0) {
                if (mapa[heady][20] > 1) { break; }
                headx = 20;
            }
            else {
                if (mapa[heady][headx - 1] > 1) { break; }
                headx--;
            }
        }
        else if (last == 'd') {
            if (headx == 20) {
                if (mapa[heady][0] > 1) { break; }
                headx = 0;
            }
            else {
                if (mapa[heady][headx + 1] > 1) { break; }
                headx++;
            }
        }
        cout << '\a';
    }
    cout << "you lose";
    char endGame = _getch();
}

int main() {
    char input;
    int crs = 0;
    while (true) {
        if (crs == 0) { cout << "Start game! <<" << endl; }
        else { cout << "Start game!" << endl; }
        if (crs == 1) { cout << "Score <<" << endl; }
        else { cout << "Score" << endl; }
        if (crs == 2) { cout << "Exit <<" << endl; }
        else { cout << "Exit" << endl; }
        input = _getch();
        if (input == 'w' && crs > 0) { crs--; }
        if (input == 's' && crs < 2) { crs++; }
        if (input == 'd') {
            if (crs == 0) game();
            if (crs == 2) break;
        }
        system("cls");
    }
}