#include <MPU6050_light.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h> // Include the LiquidCrystal_I2C library

int lcdAddress = 0x27;

MPU6050 mpu(Wire);
LiquidCrystal_I2C lcd(lcdAddress, 16, 2);

unsigned long timer = 0;

#define PADDLE_LEFT 4
#define PADDLE_RIGHT 5
#define BUZZER 6
#define SCORE_INPUT 8
#define LIFE_COUNT 9
#define RESET 10


float angleX , angleY , angleZ;
int currentScore = 0;
int highestScore = 0;
int lifeCount = 3;

int pin_8_prevValue = 0 ;
int pin_9_prevValue = 0 ;
int change = 0;

void setup(){

  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  Wire.begin();
  mpu.begin();
  mpu.calcGyroOffsets();        //for calibration

  //PIN CONFIGURATIONS
  pinMode(PADDLE_LEFT, OUTPUT);
  pinMode(PADDLE_RIGHT, OUTPUT);
  pinMode(BUZZER, OUTPUT);
  pinMode(SCORE_INPUT, INPUT);
  pinMode(LIFE_COUNT, INPUT);
  pinMode(RESET, INPUT);
  inGameDisplay();
}

void inGameDisplay(){
    lcd.clear();                     
    lcd.print("Score:");
    lcd.print(currentScore);
    lcd.setCursor(0,1); 
    lcd.print("Life Left: ");
    lcd.print(lifeCount);
}


void gameEndDisplay(){
    lcd.clear();                     
    lcd.setCursor(0,0);  
    lcd.print("Game Over!");
    lcd.setCursor(0,1); 
    lcd.print("Score:");
    lcd.print(currentScore);

    lcd.print(" Best:");
    lcd.print(highestScore);
}



void loop(){
    
    int pinValue1 = digitalRead(LIFE_COUNT);
    int pinValue = digitalRead(SCORE_INPUT);       
    mpu.update();      
    
    //score update
    if(pinValue>0 && pin_8_prevValue==0){
      if(lifeCount>-1) {
        change = 1;
        currentScore++;
        digitalWrite(BUZZER,HIGH);
        delay(60);
        digitalWrite(BUZZER,LOW);
      }
      if(currentScore>highestScore) highestScore = currentScore ;
    }
    pin_8_prevValue = pinValue;

    
    if(pinValue1>0 && pin_9_prevValue==0){
      change = 1;
      if(lifeCount>-1) lifeCount--, delay(60);
      if(lifeCount==-1) {
          tone(BUZZER, 1000);
          delay(1000);
          tone(BUZZER, 20000);
          delay(1000);
          tone(BUZZER,1000);
          delay(1000);
          noTone(BUZZER);
          lifeCount--;
      }
    }
    pin_9_prevValue = pinValue1;

  
  digitalWrite(PADDLE_RIGHT, LOW);
  digitalWrite(PADDLE_RIGHT, LOW);

  if(1)                         // print data every 3ms
  {            
    
    angleX = mpu.getAngleX();
    // angleY = mpu.getAngleY();
    // angleZ = mpu.getAngleZ();

    if (angleX > 10) {
        digitalWrite(PADDLE_LEFT, HIGH); // Set the pin to HIGH
        delay(2);
        digitalWrite(PADDLE_LEFT , LOW);
    }
    

    if (angleX < -10) {
        digitalWrite(PADDLE_RIGHT, HIGH); // Set the pin to HIGH
        delay(2);
        digitalWrite(PADDLE_RIGHT,LOW);
    }
    

    int resetPinValue = digitalRead(RESET);
    if(resetPinValue>0){
        change = 1;
        lifeCount = 3;
        currentScore = 0;
    }


    if(change == 1 && lifeCount>-1){
      inGameDisplay();
    } else if (change == 1){
      gameEndDisplay();
    }
    change = 0;

    // timer = millis();  
  }
}