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

LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD address: 0x27, 16 columns, 2 rows

const int upButtonPin = A3;      // tombol up/down
const int startButtonPin = A1;   // tombol start
const int stopButtonPin = A2;    // tombol stop
const int transduser = 10;       // output transduser
const int motordc = 11;          // output motor pump
const int buzzer = 12;           // buzzer

int timer = 0;                    // timer setting
int timerout[] = {5, 10, 15, 20}; // pilihan timer
int flag, menit, detik, counter;  // untuk timer
bool stopButtonPressed = false;   // Variabel global untuk tombol stop

void setup() {
  pinMode(upButtonPin, INPUT_PULLUP);
  pinMode(startButtonPin, INPUT_PULLUP);
  pinMode(stopButtonPin, INPUT_PULLUP);
  pinMode(transduser, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(motordc, OUTPUT);

  Timer1.initialize(1000000);
  Timer1.attachInterrupt(isr);
  timer = EEPROM.read(1); // Read timer value from EEPROM

  lcd.begin(16, 2);  // inisialisasi lcd 16x2
  lcd.backlight();     // Turn on the backlight
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(" ATEM ANDAKARA ");
  lcd.setCursor(0, 1);
  lcd.print("  >> PKK 6 <<  ");
  delay(4000);
  lcd.clear();


  // Judul
  lcd.setCursor(0, 0);
  lcd.print("Ultrasonic Cleaner");
  lcd.setCursor(0, 1);
  lcd.print("Berbasis Arduino");
  delay(1500);
  lcd.clear();

  // Nama dan NIM
  lcd.setCursor(0, 0);
  lcd.print("  Dodi Muhadi  ");
  lcd.setCursor(0, 1);
  lcd.print("  NIM 21272022 ");
  delay(1500);
  lcd.clear();

  // Pembimbing
  lcd.setCursor(0, 0);
  lcd.print("Dosen Pembimbing");
  lcd.setCursor(0, 1);
  lcd.print("Samsul Mujakar,ST.,MT");
  delay(1500);
  lcd.clear();

}

void loop() {
  setting();

  // Cek status tombol stop secara terus-menerus
  if (digitalRead(stopButtonPin) == LOW) {
    stopButtonPressed = true;
    // Tunggu hingga tombol dilepaskan sebelum melanjutkan
    while (digitalRead(stopButtonPin) == LOW) {
      delay(10); // Delay untuk debounce
    }
  }

  if (stopButtonPressed) {
    lcd.clear();
    lcd.setCursor(4, 0);
    lcd.print("    STOP    ");
    stopProgram();
    stopButtonPressed = false; // reset stop button state
  } else {
    mainprogram();
  }
}

void isr() {
  if (flag == 1) {
    if (menit > -1) {
      detik--;
      if (detik < 0) {
        if (menit > 0) menit--;
        detik = 59;
      }
    }
  }
}

// Kode untuk pengaturan timer
void setting() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("  Select Timer: ");
  lcd.setCursor(0, 1);
  lcd.print(">>>>>>>><<<<<<<<");
  
  int selectedTimer = 0;

  while (selectedTimer == 0) {
    if (digitalRead(upButtonPin) == LOW) {
      timer++;
      if (timer > 4) timer = 0;
      displaySelectedTimer(timer);
      delay(200);
    }

    if (digitalRead(startButtonPin) == LOW) {
      switch (timer) {
        case 0:
          menit = 2;
          break;
        case 1:
          menit = 5;
          break;
        case 2:
          menit = 10;
          break;
        case 3:
          menit = 15;
          break;
        case 4:
          menit = 20;
          break;
      }
      selectedTimer = 1;
    }
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Timer Selected:");
  lcd.setCursor(0, 1);
  lcd.print(menit);
  lcd.print(" >>>>Menit<<<< ");
  delay(2000);
}

// Kode untuk menampilkan timer yang dipilih
void displaySelectedTimer(int timer) {
  lcd.setCursor(0, 1);
  lcd.print("               ");
  lcd.setCursor(0, 1);
  switch (timer) {
    case 0:
      lcd.print("   1: 2 Menit" );
      break;
    case 1:
      lcd.print("   2: 5 Menit");
      break;
    case 2:
      lcd.print("   3: 10 Menit");
      break;
    case 3:
      lcd.print("   4: 15 Menit");
      break;
    case 4:
      lcd.print("   5: 20 Menit");
      break;
  }
}

// Kode untuk menjalankan program utama
void mainprogram() {
  lcd.clear();
  detik = 0;
  flag = 1;
  digitalWrite(transduser, HIGH);

  while (1) {
    if (digitalRead(stopButtonPin) == LOW) break;
    if (menit == 0 && detik == 0) break;

    // Tampilkan informasi program yang sedang berjalan
    lcd.clear();
    lcd.setCursor(4, 0);
    lcd.print("RUNNING");
    lcd.setCursor(2, 1);
    lcd.print("TIME = ");
    lcd.print(menit);
    lcd.print(" :");
    lcd.print(detik);

    delay(1000);

    if (flag == 60 && menit > 0) {
      detik--;
      if (detik < 0) {
        menit--;
        detik = 00;
      }
    }
  }

  lcd.clear();
  lcd.setCursor(6, 0);
  lcd.print("DONE");
  digitalWrite(transduser, LOW);
  digitalWrite(buzzer, HIGH);
  delay(4000);
  digitalWrite(buzzer, LOW);

  // Setelah program selesai
  lcd.clear();
  lcd.setCursor(6, 0);
  lcd.print("DONE");
  digitalWrite(transduser, LOW);
  digitalWrite(buzzer, HIGH);
  delay(4000);
  digitalWrite(buzzer, LOW);

  lcd.clear();
  lcd.setCursor(5, 0);
  lcd.print("Proses");
  lcd.setCursor(0, 1);
  lcd.print(" Pembuangan Air");

  digitalWrite(motordc, HIGH);
  delay(90000); // delay waktu pembuangan air
  digitalWrite(motordc, LOW);
  digitalWrite(buzzer, HIGH);
  delay(3000);
  digitalWrite(buzzer, LOW);
}

// Kode untuk menghentikan program
void stopProgram() {
  digitalWrite(transduser, LOW); // Matikan transduser
  digitalWrite(motordc, LOW);    // Matikan motor
  digitalWrite(buzzer, HIGH);    // Aktifkan buzzer
  delay(3000);                    // Tahan buzzer selama 3 detik
  digitalWrite(buzzer, LOW);     // Matikan buzzer
}