#include <time.h>
#include <iostream>
#include <stdio.h>
#include <curses.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
using namespace std;

#define termMaxX 145
#define termMaxY 36
#define upArrow 65
#define downArrow 66
#define rightArrow 67
#define leftArrow 68


void drawVoid(){

    printf("\033[1;32m\033[40m \033[0m"); //\033[1;32m green text,\033[40m black bg, display " ",\033[0m set default
}
void drawSnake(){
    printf("\033[1;32m\033[40m*\033[0m"); //\033[1;32m green text,\033[40m black bg, display *,\033[0m set default
}
void SetCursorPosition(int XPos, int YPos) {
    printf("\033[%d;%dH",YPos+1,XPos+1);
}

void moveSnake(int deltaX, int deltaY, int posX[100], int posY[100], int tempX[2], int tempY[2]){

    tempX[0]=posX[0]+deltaX;
    tempY[0]=posY[0]+deltaY;
    bool sw=0;
    for(int i=0;(posX[i]!=-1)&&(posY[i]!=-1);i++){
        if((posX[i+1]==-1)&&(posY[i+1]==-1)){
            SetCursorPosition(posX[i],posY[i]);
            drawVoid();
        }
        if(sw==0){
            tempX[1]=posX[i];
            tempY[1]=posY[i];
            posX[i]=tempX[0];
            posY[i]=tempY[0];
            SetCursorPosition(posX[i],posY[i]);
            drawSnake();
            sw=1;
        }
        else if(sw==1){
            tempX[0]=posX[i];
            tempY[0]=posY[i];
            posX[i]=tempX[1];
            posY[i]=tempY[1];
            SetCursorPosition(posX[i],posY[i]);
            drawSnake();
            sw=0;
        }

    }

}
void drawFrame(){

    for(int i=0;i<30;i++){
        for(int j=0;j<100;j++){
            if(i==0||i==29){
                SetCursorPosition(j,i);
                printf("\033[45m \033[0m");
            }
            else if(j==0||j==99){
                SetCursorPosition(j,i);
                printf("\033[45m \033[0m");
            }
        }
    }
}

int main () {
    clock_t start_t,this_t;
    start_t=clock();
    int posX[100],posY[100],fruitX,fruitY,ft=0;
    int tempX[2],tempY[2];
    double thistimeMillisec;
    srand(time(NULL));
    /*for(int j=0;j<20;j++){
        star[0][j]=rand()%4+2;//2-5
    }*/

    char input,lastInput;
    initscr();
    cbreak();
    noecho();
    scrollok(stdscr, TRUE);
    nodelay(stdscr, TRUE);
    sleep(1);//รอโปรแกรมเปิด

    start_color();
    init_pair(1,COLOR_WHITE, COLOR_BLACK);
    wbkgd(stdscr, COLOR_PAIR(1));
    printf("\e[?25l");//ปิดcursor
    for(int i=0;i<100;i++){

        posX[i]=-1;
        posY[i]=-1;
    }
    posX[0]=95;
    posY[0]=25;
    posX[1]=95;
    posY[1]=25;
    srand(time(NULL));
    fruitX=rand()%98+1;
    fruitY=rand()%28+1;
    while(1){ //เริ่มเกม
        this_t=clock();
        SetCursorPosition(posX[0],posY[0]);

        if(ft<5){//สร้างงูรอบแรกสุด
            drawSnake();
            drawFrame();
            ft++;
        }
        input=getch();//รับจากแป้นพิมพ์
        if(input=='x'){
            break;
        }
        if(input=='a'||input==leftArrow){
            if((posX[0]>1)&&(lastInput!='d')){
                moveSnake(-1,0,posX,posY,tempX,tempY);
                lastInput='a';
            }
        }
        else if(input=='d'||input==rightArrow){
            if((posX[0]<98)&&(lastInput!='a')){
                moveSnake(1,0,posX,posY,tempX,tempY);
                lastInput='d';
            }
        }
        else if(input=='w'||input==upArrow){
            if((posY[0]>1)&&(lastInput!='s')){
                moveSnake(0,-1,posX,posY,tempX,tempY);
                lastInput='w';
            }
        }
        else if(input=='s'||input==downArrow){
            if((posY[0]<28)&&(lastInput!='w')){
            moveSnake(0,1,posX,posY,tempX,tempY);
            lastInput='s';
            }
        }
        else if(input=='b'){
            lastInput='0';
        }

        thistimeMillisec=(double)(this_t-start_t)/(double)CLOCKS_PER_SEC*15;
        if(((int)thistimeMillisec%10)==1){
            if(lastInput=='a'){
                if(posX[0]>1){
                    moveSnake(-1,0,posX,posY,tempX,tempY);
                    lastInput='a';
                }
            }
            else if(lastInput=='d'){
                if(posX[0]<98){
                    moveSnake(1,0,posX,posY,tempX,tempY);
                    lastInput='d';
                }
            }
            else if(lastInput=='w'){
                if(posY[0]>1){
                    moveSnake(0,-1,posX,posY,tempX,tempY);
                    lastInput='w';
                }
            }
            else if(lastInput=='s'){
                if(posY[0]<28){
                moveSnake(0,1,posX,posY,tempX,tempY);
                lastInput='s';
                }
            }
            start_t=this_t;
        }
        SetCursorPosition(fruitX,fruitY);
        printf("0");
        //system("((speaker-test -t sine -f 700)& pid=$!; sleep 0.1s; kill -9 $pid) > /dev/null");
    }
    return(0);
}