#include <Wire.h>  
#include <LiquidCrystal_I2C.h> // muss installiert werden
#include <EEPROM.h>

// I2C Adresse meist 0x27 oder 0x3F
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Verbindung:
// GND -> GND
// VCC -> 5V
// SDA -> A4
// SCL -> A5
// Buttons	Pin 7 and Pin 8
// Buttons	GND
const int buttonPin1 = 7;   // Button input pin P1
const int buttonPin2 = 8;   // Button input pin P2

// ===== HIGH SCORE SYSTEM =====
const int MAX_SCORES = 3;
long highScores[MAX_SCORES] = {0,0,0};
int storedCount = 0;

unsigned long bothPressedStart = 0;
bool bothPressed = false;

void loadScoresFromEEPROM() {
  EEPROM.get(0, highScores);
  storedCount = 0;
  for (int i = 0; i < MAX_SCORES; i++) {
    if (highScores[i] != 0) storedCount++;
  }
}

void saveScoresToEEPROM() {
  EEPROM.put(0, highScores);
}

void tryStoreScore(long newScore) {
  // First score always accepted
  if (storedCount == 0) {
    highScores[0] = newScore;
    storedCount = 1;
    lcd.clear();
    lcd.print("1st Stored!");
    delay(1000);
    return;
  }

  // Find current best (minimum value)
  long minVal = highScores[0];
  for (int i = 1; i < storedCount; i++) {
    if (highScores[i] < minVal) {
      minVal = highScores[i];
    }
  }

  // Only accept if better (smaller)
  if (newScore < minVal) {
    if (storedCount < MAX_SCORES) {
      highScores[storedCount] = newScore;
      storedCount++;
      lcd.clear();
      lcd.print("Better Score!");
      delay(1000);
    } else {
      lcd.clear();
      lcd.print("Top 3 full");
      lcd.setCursor(0,1);
      lcd.print("No change");
      delay(1500);
    }
  } else {
    lcd.clear();
    lcd.print("Not better");
    delay(1000);
  }
}

void checkBothButtons() {
  bool b1 = digitalRead(buttonPin1) == LOW;
  bool b2 = digitalRead(buttonPin2) == LOW;

  if (b1 && b2) {
    if (!bothPressed) {
      bothPressed = true;
      bothPressedStart = millis();
    }

    if (millis() - bothPressedStart >= 5000) {
      saveScoresToEEPROM();
      lcd.clear();
      lcd.print("Saved EEPROM");
      delay(1500);
      bothPressed = false;
    }
  } else {
    bothPressed = false;
  }
}
// ===== END HIGH SCORE SYSTEM =====

void setup() {
  pinMode(buttonPin1, INPUT_PULLUP); // internal pull-up resistor
  pinMode(buttonPin2, INPUT_PULLUP); // internal pull-up resistor
  lcd.init();        // initialize I2C display
  lcd.backlight();   // turn on backlight

  loadScoresFromEEPROM(); // <-- added

  lcd.setCursor(0,0);
  lcd.print("Reaction Timer!");
  delay(2000);
  lcd.clear();
}

void loop() {

  checkBothButtons(); // <-- added
  
  while (digitalRead(buttonPin1) == LOW || digitalRead(buttonPin2) == LOW) { }
  lcd.setCursor(0,0);
  lcd.print("Get Ready...");
  delay(random(3000,6000));   // random wait 3-6 s
  lcd.clear();
  lcd.setCursor(0,0);

  while (digitalRead(buttonPin1) == LOW || digitalRead(buttonPin2) == LOW) {
        // wait for button release
   }
  lcd.print("NOW!");
  long startTime = millis();
  long reactionTime= 100000;
  int winner = 0;
  while ((digitalRead(buttonPin1) == HIGH)&&(digitalRead(buttonPin2) == HIGH)) {
  // Wait for first valid press
   while (true) {
    if (digitalRead(buttonPin1) == LOW) {
      winner = 1;
      break;
    }
    if (digitalRead(buttonPin2) == LOW) {
      winner = 2;
      break;
    }
   }
   reactionTime = millis() - startTime;
  }

  lcd.clear();
  lcd.print("P");
  lcd.print(winner);
  lcd.print(" wins!");
  lcd.setCursor(0, 1);
  lcd.print("Time:");
  lcd.print(reactionTime);
  lcd.print(" ms");

  delay(2000);

  // ===== STORE SCORE HERE =====
  tryStoreScore(reactionTime);
  // ===== END STORE =====

  lcd.clear();
}