const int leds[] = { 13 , 12 , 11 , 10 , 9 , 8 , 7 , 6 , 5};
const int ledStripSize = sizeof(leds) / sizeof(leds[0]);

const int rows = 3;
const int cols = 3;

int posX = 0;
int posY = 0;

//controls
int HORZ_PIN = A1;
int VERT_PIN = A0;
int SEL_PIN = 4;

//
int randomX;
int randomY;


//
const int speakerPin = 3;

//creating a static array since dynamic arrays are not allow
int ledMatrix[rows][cols];

void setup() {
   Serial.begin(9600);
   for(int i = 0 ; i < ledStripSize ; i++ ){
      pinMode(leds[i] , OUTPUT); 
   } 
  //controls
  pinMode(VERT_PIN, INPUT);
  pinMode(HORZ_PIN, INPUT);
  pinMode(SEL_PIN, INPUT_PULLUP);

  //speaker
  pinMode(speakerPin , OUTPUT);
   
  //assigning
  int counter = 0;
  while(counter < ledStripSize){
      for(int x = 0; x < rows ; x++ ) {
        for(int y = 0 ; y < cols ; y++){
           ledMatrix[x][y] = leds[counter];
          //  Serial.println(ledMatrix[x][y]);
            counter++;
           }
        }
  }
  spawnSeed();
  blink(300);

}

// generating a dot in the random positon 

void loop() {

  //check if colliding
   if(ledMatrix[randomX][randomY] == ledMatrix[posX][posY]){
      Serial.println("Collided");
      tone(speakerPin , 165);
      clear();
      delay(100);
      noTone(speakerPin);
      spawnSeed();
   }
   

   int horz = analogRead(HORZ_PIN);
   int vert = analogRead(VERT_PIN);
 
   if(horz == 512 && vert == 1023){
    Serial.println("UP");
    up();
   }

   if(horz == 512 && vert == 0){
    Serial.println("DOWN");
    down();
   }

   if(horz == 0 && vert == 512){
    Serial.println("RIGHT");
    right();
   }

   if(horz == 1023 && vert == 512){
    Serial.println("LEFT");
    left();
   }


   //reset positons 
   if(digitalRead(SEL_PIN) == LOW){
    posX = 0;
    posY = 0;
   }


   blink(100);
}

void right(){
  if(posY < cols - 1){
      posY++;
  }
  blink(300);
}

void left(){
  if(posY > 0){
      posY--;
  }
  blink(300);
}

void up(){
  if(posX > 0){
   posX--;
  }
  blink(300);
}

void down(){
  if(posX < rows - 1){
     posX++;
  }
  blink(300);
}

void blink(int duration){
  digitalWrite(ledMatrix[posX][posY] , HIGH);
  delay(duration);
  // Serial.println("X"); Serial.println(posX);
  // Serial.println("Y"); Serial.println(posY);
  digitalWrite(ledMatrix[posX][posY] , LOW);
  delay(duration);
}


///let H

void spawnSeed(){
   randomX = random(0 , 3);
   randomY = random(0 , 3);
   //if the led is at the same postion as the seed , then redo
   if(ledMatrix[randomX][randomY] == ledMatrix[posX][posY] ){
      spawnSeed();
   }
   digitalWrite(ledMatrix[randomX][randomY] , HIGH);

   delay(1000);
}

void clear(){
  digitalWrite(ledMatrix[randomX][randomY] , LOW);
}