#include <MD_MAX72xx.h>
#include <ezButton.h>

// matrix controls
const byte data_pin = 11;
const byte chip_select_pin = 10;
const byte clock_pin = 13;
const byte max_devices = 4;
int headY = 0;
int headX = 0;
String direction = "", prevDirection = "";
int maxX = 31;
int maxY = 7;
ezButton button (8);
int flag = 0;

// creating matrix object
MD_MAX72XX matrix = MD_MAX72XX(MD_MAX72XX::PAROLA_HW, chip_select_pin, max_devices);

// define the joystick controls
const byte hpin = A0;
const byte vpin = A1;

void setup(){
  Serial.begin(9600);
  matrix.begin();
  matrix.clear();
  button.setDebounceTime(25);
  matrix.setPoint(headX,headY,true);
}

void loop(){
 // put your main code here, to run repeatedly:
  button.loop();
  if (flag==0){
    checkDirection();
    moveSprite();
  }
  matrix.setPoint(headY,headX,true);
}

void checkDirection(){
  if (analogRead(hpin)>512&&prevDirection!="right"){
    direction = "left";
  }
  else if (analogRead(hpin)<512&&prevDirection!="left"){
    direction = "right";
  }
  else if (analogRead(vpin)>512&&prevDirection!="down"){
    direction = "up";
  }
  else if (analogRead(vpin)<512&&prevDirection!="up"){
    direction = "down";
  }
  prevDirection = direction;

}

void moveSprite(){
  if (direction=="left") headX++;
  else if (direction=="right") headX--;
  else if (direction=="up") headY--;
  else if (direction=="down") headY++;
  windowCheck();
  if (button.isPressed()){
    Serial.println("The Button is Pressed");
    flag = 1;
  }
}

void windowCheck(){
  if (headX>maxX) headX=0;
  else if (headX<0) headX=maxX;
  else if (headY>maxY) headY=0;
  else if (headY<0) headY=maxY;
}