#include <Wire.h>
#include <LiquidCrystal_I2C.h>

int inputPin = 2; // Input pin with pull-up resistor
int m_forward = 3; // Relay 1 (forward) control pin
int m_reverse = 4; // Relay 2 (reverse) control pin
long value = 40;
long menit = 60000;
unsigned long startMillis = 0;
bool timerActive = false;
unsigned long remainingTime = 0; // New variable for remaining time
const unsigned long forwardDuration = 5000; // Forward duration (in milliseconds)
const unsigned long reverseDuration = 5000; // Reverse duration (in milliseconds)
const unsigned long stopDuration = 1000; // Stop duration (in milliseconds)
bool isForward = true; // Forward/reverse status

LiquidCrystal_I2C lcd(0x27, 16, 2); // Initialize the LCD with its I2C address (0x27) and dimensions (16x2)

void setup() {
  Serial.begin(9600);
  pinMode(inputPin, INPUT_PULLUP);
  pinMode(m_forward, OUTPUT);
  pinMode(m_reverse, OUTPUT);

  lcd.init(); // Initialize the LCD
  lcd.backlight(); // Turn on the 
  lcd.setCursor(0, 0); // Set the cursor to the first row
  lcd.print("TIMER MESIN CUCI"); // Display initial message
  lcd.setCursor(0, 1); // Set the cursor to the first row
  lcd.print("    BY ANDRI"); // Display initial message  
}

void loop() {
  if (digitalRead(inputPin) == LOW) {
    // Input pull-up active, start the timer
    startMillis = millis();
    timerActive = true;
    lcd.clear();
    Serial.println("CUCI DIMULAI!");
    lcd.setCursor(1, 0); // Set the cursor to the first row
    lcd.print("CUCI DIMULAI!!"); // Display initial message
  }

  if (timerActive) {
    unsigned long currentMillis = millis();
    remainingTime = menit * value - (currentMillis - startMillis); // Calculate remaining time
    lcd.setCursor(0, 1); // Set cursor to the second row
    lcd.print("Waktu: " + String(remainingTime / 60000) + "Mnt " + String((remainingTime % 60000) / 1000)+ "dtk ");
  Serial.print("Waktu: " + String(remainingTime / 60000) + ":" + String((remainingTime % 60000) / 1000));
    if (currentMillis - startMillis >= (menit)*(value)) {
      // Timer ends
      timerActive = false;
      digitalWrite(m_forward, LOW); // Turn off relay 1
      digitalWrite(m_reverse, LOW); // Turn off relay 2
      Serial.println("NYUCINYA UDAH SELESAI BANG!!");
      lcd.clear();
      lcd.setCursor(0, 0); // Set the cursor to the first row
      lcd.print(" CUCI SELESAI!!"); // Display initial message
    } else {
      // During the timer, alternate between relays
      if (isForward && currentMillis - startMillis < forwardDuration) {
    digitalWrite(m_forward, HIGH);
    digitalWrite(m_reverse, LOW);
  }
  // Reverse for 5 seconds after moving forward
  else if (!isForward && currentMillis - startMillis < reverseDuration) {
    digitalWrite(m_forward, LOW);
    digitalWrite(m_reverse, HIGH);
  }
  // Stop for 1 second before changing direction
  else if (currentMillis - startMillis < forwardDuration + stopDuration) {
    digitalWrite(m_forward, LOW);
    digitalWrite(m_reverse, LOW);
  }
  // Switch direction after completing the duration
  else {
    isForward = !isForward;
    startMillis = currentMillis; // Reset start time
    digitalWrite(m_forward, LOW);
    digitalWrite(m_reverse, LOW);
  }
    }
  }

  // Print remaining time on the LCD
 
}