#include<iostream>
#include<conio.h>
#include<thread>
using namespace std;
using namespace std::literals;
int map[20][20], snake[1000][3], pts, length, fx;
auto speed=1.0s;
bool quit;
inline void sleep(auto time) {
    this_thread::sleep_for(time);
}

struct Game {
    static void gameover()
    {
        quit = true;
        sleep(0.5s);
        system(cls);
        cout << 你死了，最终得到了 << pts << 分，按F重新开始游戏;
        char key = 0;
        while (1)
        {
            if (_kbhit())
            {
                key = _getch();
                if (key == 'f' or key == 'F')
                {
                    break;
                }
            }
        }
        initialize();
    }
    static void move()
    {

        while (1)
        {
            if (quit)return;
            sleep(speed);
            int lastx = snake[length][1];
            int lasty = snake[length][2];
            if (length >= 2)
            {
                map[lastx][lasty] = 0;
                map[snake[1][1]][snake[1][2]] = 1;

            }
            else
            {
                map[snake[1][1]][snake[1][2]] = 0;
            }
            for (int i = length; i >= 2; i--)
            {
                snake[i][1] = snake[i - 1][1];
                snake[i][2] = snake[i - 1][2];
            }
            bool crack = false;
            if (fx == 1)
            {
                snake[1][1]--;
            }
            if (fx == 2)
            {
                snake[1][1]++;
            }
            if (fx == 3)
            {
                snake[1][2]--;
            }
            if (fx == 4)
            {
                snake[1][2]++;
            }
            int x = snake[1][1];
            int y = snake[1][2];
            if (x < 1 or map[x][y] == 1 or y < 1 or x > 15 or y > 15)
            {
                gameover();
            }
            else
            {
                if (map[x][y] == 3)
                {
                    int bs = 1;
                    if (speed == 0.5s)bs = 2;
                    if (speed == 0.3s)bs = 3;
                    if (speed == 0.1s)bs = 5;
                    pts=pts+bs;
                    length++;
                    snake[length][1] = lastx;
                    snake[length][2] = lasty;
                    map[lastx][lasty] = 1;
                    fruit();
                }
                map[x][y] = 2;
            }
        }
    }
    static void display()
    {

        while (1)
        {
            if (quit)return;
            cout << 分数: << pts << endl;
            for (int i = 1; i <= 16; i++)cout << --;
            cout << endl;
            for (int i = 1; i <= 15; i++)
            {
                for (int j = 1; j <= 15; j++)
                {
                    if (map[i][j] == 0)cout <<   ;
                    if (map[i][j] == 1)cout << ██;
                    if (map[i][j] == 2)
                    {
                        if (fx == 1)cout << ↑ ;
                        if (fx == 2)cout << ↓ ;
                        if (fx == 3)cout << ← ;
                        if (fx == 4)cout << → ;
                    }
                    if (map[i][j] == 3)cout << ＃;
                }
                cout << | << endl;
            }
            for (int i = 1; i <= 16; i++)cout << --;
            cout << endl<<移动：WASD/↑←↓→;
            cout << endl << 重新开始：一头创死;
            string temp = ;
            if (speed == 1s)temp = 1;
            if (speed == 0.5s)temp = 0.5;
            if (speed == 0.3s)temp = 0.3;
            if (speed == 0.1s)temp = 0.1;
            cout << endl << 当前速度： << temp << s/格，调整速度请按T键 << endl;
            sleep(0.1s);
            system(cls);
        }
    }
    static void monitor()
    {

        char key = 0;
        while (1)
        {
            if (quit)return;
            key = 0;
            if (_kbhit())
            {
                key = _getch();
                int ff = 0;
                if (snake[2][1] == snake[1][1] - 1)ff = 1;
                if (snake[2][1] == snake[1][1] + 1)ff = 2;
                if (snake[2][2] == snake[1][2] - 1)ff = 3;
                if (snake[2][2] == snake[1][2] + 1)ff = 4;
                int temp = fx;
                if (key == 72 or key == 'w' or key == 'W')fx = 1;
                else if (key == 75 or key == 'a' or key == 'A')fx = 3;
                else if (key == 77 or key == 'd' or key == 'D')fx = 4;
                else if (key == 80 or key == 's' or key == 'S')fx = 2;
                else if (key == 't' or key == 'T')
                {
                    if (speed == 1s)speed = 0.5s;
                    else if (speed == 0.5s)speed = 0.3s;
                    else if (speed == 0.3s)speed = 0.1s;
                    else speed = 1s;
                }
                if (fx == ff)fx = temp;
            }
        }
    }
    static void fruit()
    {
        int x = 0;
        int y = 0;
        while (map[x][y] == 0)
        {
            x = rand() % 15 + 1;
            y = rand() % 15 + 1;
            if (map[x][y] == 0)
            {
                map[x][y] = 3;
                break;
            }
            x = 0;
            y = 0;
        }
    }
    static void initialize()
    {
        srand(time(0));
        speed = 1s;
        pts = 0;
        quit = false;
        int xx = 0;
        int yy = 0;
        for (int i = 1; i <= 15; i++)
            for (int j = 1; j <= 15; j++)map[i][j] = 0;
        length = 1;
        xx = rand() % 12 + 2;
        yy = rand() % 12 + 2;
        snake[1][1] = xx;
        snake[1][2] = yy;
        fx = rand() % 4 + 1;
        map[xx][yy] = 2;
        fruit();
        thread t1(display);
        thread t2(monitor);
        thread t3(move);
        t1.join();
        t2.join();
        t3.join();
    }
};

int main()
{
    Game::initialize();
}