#include <Wire.h>    // Library untuk modul RTC
#include <SPI.h>     // Library untuk modul microSD
#include <SD.h>      // Library untuk modul microSD
#include <TimeLib.h> // Library untuk modul RTC
#include <Adafruit_BusIO_Register.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_I2CRegister.h>
#include <Adafruit_SPIDevice.h>
#include <RTClib.h>
#include <LiquidCrystal.h> // Library untuk modul LCD
#include <avr/sleep.h> // untuk sleep mode

// Sensor Ultrasonic
const int trigPin = 9;
const int echoPin = 10;
float durasi, cm, wl; // Tipe data yang dapat menampung nilai desimal

// MicroSD dan RTC
RTC_DS1307 rtc;
const int csPin = 4;
File myFile;

// LCD
LiquidCrystal lcd(8, 7, 6, 5, 3, 2); // Hubungkan RS, E, D4, D5, D6, D7 ke pin yang Anda pilih

// Pompa
const int pumpPin = 1; // Ganti dengan pin yang sesuai untuk mengendalikan pompa
String pumpCondition;

// Alarm (Buzzer)
const int buzzerPin = 0;

// LED
const int ledPin = 18;

// Sleep mode
void enterSleepMode() {
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  sleep_enable();
  sleep_mode();
  sleep_disable();
}

void setup() {
  // Konfigurasi koneksi serial
  Wire.begin();
  Serial.begin(9600);
  while (!Serial);

  // Inisialisasi RTC
  if (!rtc.begin()) {
    Serial.println("RTC Tidak Terbaca");
    while (1);
  }
  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  Serial.println("Inisialisasi RTC Sukses");
  
  // Inisialisasi microSD
  pinMode(csPin, OUTPUT);
  if (!SD.begin(csPin)) {
    Serial.println("MicroSD Error atau Hilang");
    while (1);
  }
  Serial.println("Inisialisasi MicroSD Sukses");

  // Inisialisasi Ultrasonic Sensor
  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);

  // Inisialisasi Alarm
  pinMode(buzzerPin, OUTPUT);

  // LED
  pinMode(ledPin, OUTPUT);
  digitalWrite(18, LOW);

  // Inisialisasi LCD
  lcd.begin(20, 4); // 20 karakter x 4 baris
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Automatic Water Level Recording");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(1000);

   // Inisialisasi Pompa
  pinMode(pumpPin, OUTPUT);
  digitalWrite(pumpPin, LOW); // Pastikan pompa dimatikan pada awalnya
}

void loop() {
  
  loggingTanggal();
  loggingWaktu();
  loggingWaterlevel();
  loggingMicroSD();
  controlPump(); // Fungsi untuk mengendalikan pompa
  delay(4000);

  // Masukkan mikrokontroler ke sleep mode selama 60 detik
  enterSleepMode();
}

void activateAlarm() {
  digitalWrite(buzzerPin, HIGH);
}

void deactivateAlarm() {
  digitalWrite(buzzerPin, LOW);
}

void controlPump() {
  // Tentukan tingkat air minimum untuk mengaktifkan pompa (misalnya 10 cm)
  float minWaterLevel = 10.0;

  if (wl < minWaterLevel) {
    // Aktifkan pompa
    digitalWrite(pumpPin, HIGH);
    pumpCondition = "ON ";
    lcd.setCursor(0, 3);
    lcd.print("Pump: ");
    lcd.print(pumpCondition);
    lcd.print(" Alarm: ON ");
    activateAlarm();
    // Kedipkan LED saat pompa aktif
    blinkLED(ledPin, 0);  

  } else {
    // Matikan pompa
    digitalWrite(pumpPin, LOW);
    pumpCondition = "OFF";
    lcd.setCursor(0, 3);
    lcd.print("Pump: ");
    lcd.print(pumpCondition);
    lcd.print(" Alarm: OFF");
    deactivateAlarm();
    // Matikan LED
    digitalWrite(18, LOW);
  }

}

void blinkLED(int pin, unsigned long interval) {
  static unsigned long previousMillis = 0;
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    // Ubah status LED (nyala/matikan)
    if (digitalRead(pin) == LOW) {
      digitalWrite(pin, HIGH);
    } else {
      digitalWrite(pin, LOW);
    }
  }
}

//logging Tanggal
void loggingTanggal() {
  DateTime now = rtc.now();
  // Tampilkan tanggal
  lcd.setCursor(0, 1);
  lcd.print("Date: ");
  lcd.print(now.day(), DEC);
  lcd.print("/");
  lcd.print(now.month(), DEC);
  lcd.print("/");
  lcd.print(now.year(), DEC);
}

//logging waktu
void loggingWaktu() {
  DateTime now = rtc.now();
  // Tampilkan waktu
  lcd.setCursor(0, 2);
  lcd.print("Time: ");
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  lcd.print(now.second(), DEC);
}

void loggingWaterlevel() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  durasi = pulseIn(echoPin, HIGH);
  cm = (durasi * 0.0343) / 2;
  wl = 30 - cm;

  

  // Level air
  lcd.setCursor(0, 0);
  lcd.print("Water Level: ");
  lcd.print(wl);
  lcd.print("cm ");
 }

void loggingMicroSD() {
  DateTime now = rtc.now();
    // Open csv
  myFile = SD.open("AWLR.csv", FILE_WRITE);
  if (myFile) {
    myFile.print(now.day());
    myFile.print("/");
    myFile.print(now.month());
    myFile.print("/");
    myFile.print(now.year());
    myFile.print(" , ");
    myFile.print(now.hour());
    myFile.print(":");
    myFile.print(now.minute());
    myFile.print(":");
    myFile.print(now.second());
    myFile.print(" , ");
    myFile.print(wl);
    myFile.close();
    Serial.println(" | Saved to MicroSD");
  } else {
    Serial.println(" | Failed to Save to MicroSD");
  }
  delay(1000);
}