#include <LiquidCrystal_I2C.h>
#include <elapsedMillis.h>

elapsedMillis lcdUpdate(50);
elapsedMillis Time;

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int Player1 = 2;

int zone = 0;
int stopwatch = 0;

int Player1PushCounter = 0;
int Player1State = 0;
int Player1lastState = 0;

void setup() {
  Serial.begin(9600);

  lcd.init();
  lcd.backlight();

  pinMode(Player1, INPUT_PULLUP);
  Player1State = digitalRead(Player1);
  Player1State = LOW;
}

void loop() {
  // start screen
  if (zone == 1) {
    lcd.setCursor(0, 0);
    lcd.print("Press To Start");

    if (Player1State == HIGH) {
      zone = 2;
      stopwatch = 0;
    }
  }

  // game starts
  else if (zone == 2) {
    Player1State = LOW;

    if (Player1State == Player1lastState) {
      if (Player1State == HIGH) {
        Player1PushCounter++;
        lcd.setCursor(0, 0); 
        lcd.print("Player 1:  ");
        lcd.setCursor(9, 0);
        lcd.println(Player1PushCounter);
        lcdUpdate;
      }
    }

    if (Player1PushCounter >= 10) {
      zone = 3;
      stopwatch = stopwatch;
    }
  }

  // winning screen
  else if (zone == 3) {
    Player1State == Player1lastState;

    if (Player1PushCounter >= 10) {
      lcd.setCursor(0, 1);
      lcd.println(" ");
      lcd.setCursor(0, 0);
      lcd.println("P1 Wins!");

      //stopwatch shows
      lcd.setCursor(0, 1);
      lcd.print("Time: ");
      lcd.print(stopwatch);
      lcd.print("ms");

      Player1PushCounter = 0;
      stopwatch = 0;
    }

    lcdUpdate;
    zone = 1;
  }

  Player1lastState = Player1State;
  Player1State = digitalRead(Player1);
  lcdUpdate;
}