#include "LedControl.h" // We need to include the library that allows us to use the LED array

//the inputs to LedControl are: DataIn pin, CLK pin, CS pin, number of arrays
LedControl lc=LedControl(12,10,11,1); 

// Joystick pin numbers
int SW_pin = 2; // digital pin connected to switch output
int X_pin = 0; // analog pin connected to X output
int Y_pin = 1; // analog pin connected to Y output

int movePosition = 1;
int Yposition = 0;
int Xposition = 0;

int middleXvalue = 512;
int middleYvalue = 512;
int offset = 100;

byte ledRow = B00000001;

byte board[8] = {B00000000, B00000000, B00000000, B00000000,
                 B00000000, B00000000, B00000000, B00000000};

void setup() {
  lc.shutdown(0,false); // wakeup call (default is power-saving mode)
  lc.setIntensity(0,2); // Set the brightness to a medium values
  lc.clearDisplay(0); // clear the display to start
  
  pinMode(SW_pin, INPUT);
  digitalWrite(SW_pin, HIGH); // sets value of pin to HIGH (or 1) when not clicked
  Serial.begin(9600); //set up the serial monitor

  lc.setRow(0,0,ledRow);
}

void loop() {
  // checking if joystick is pushed to the left
  if (analogRead(X_pin) > (middleXvalue + offset)) {
    if (Xposition == 0) {
      Serial.print("You are already in the leftmost column");
      Serial.print("\n");
    }
    else {
      Xposition = Xposition - 1;
      ledRow = ledRow >> 1;
      lc.setRow(0, Yposition, ledRow | board[Yposition]); 
    }
  }

  // checking if joystick is pushed to the right
  if (analogRead(X_pin) < (middleXvalue - offset)) {
    if (Xposition == 7) {
      Serial.print("You are already in the righttmost column");
      Serial.print("\n");
    }
    else {
      Xposition = Xposition + 1;
      ledRow = ledRow << 1;
      lc.setRow(0, Yposition, ledRow | board[Yposition]);
    }
  }

  // checking if joystick is pushed up
  if (analogRead(Y_pin) > (middleYvalue + offset)) {
    if (Yposition == 0) {
      Serial.print("You are already in the top row");
      Serial.print("\n");
    }
    else {
      Yposition = Yposition - 1;
      lc.setRow(0, Yposition+1, 0 | board[Yposition+1]);
      lc.setRow(0, Yposition, ledRow | board[Yposition]);
    }
  }

   // checking if joystick is pushed down
    if (analogRead(Y_pin) < (middleYvalue - offset)) {
      if (Yposition == 7) {
        Serial.print("You are already in the bottom row");
        Serial.print("\n");
      }
      else {
        Yposition = Yposition + 1;
        lc.setRow(0, Yposition-1, 0 | board[Yposition-1]);
        lc.setRow(0, Yposition, ledRow | board[Yposition]);
      }
    }

    // Update board
    if (digitalRead(SW_pin) == 0){
      board[Yposition] = board[Yposition] | ledRow;  
      lc.setRow(0,Yposition,board[Yposition]);
      
      ledRow = B00000001;
      lc.setRow(0,0,ledRow | board[0]);
      Xposition = 0;
      Yposition = 0;
     
    }    

    delay(200);
  
}