#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Set the LCD address to 0x27 (or 0x3F depending on your module) for a 20 chars and 4 line display
LiquidCrystal_I2C lcd(0x27, 20, 4);
RTC_DS1307 rtc;

const int relayPin1 = 2;
const int relayPin2 = 3;
const int relayPin3 = 4;
const int relayPin4 = 5;
const int photoResistorPin = A0;
const int oneWireBus = 6; // Data wire is plugged into pin 6 on the Arduino

OneWire oneWire(oneWireBus);
DallasTemperature sensors(&oneWire);

void setup() {
  // Initialize the LCD with 20 columns and 4 rows
  lcd.begin(20, 4);
  // Turn on the backlight
  lcd.backlight();
  
  // Initialize the RTC
  if (!rtc.begin()) {
    lcd.setCursor(0, 0);
    lcd.print("Couldn't find RTC");
    while (1);
  }

  if (!rtc.isrunning()) {
    lcd.setCursor(0, 1);
    lcd.print("RTC is NOT running");
    // Uncomment the next line to set the RTC to the date & time this sketch was compiled
    // rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  // Initialize relay pins as outputs
  pinMode(relayPin1, OUTPUT);
  pinMode(relayPin2, OUTPUT);
  pinMode(relayPin3, OUTPUT);
  pinMode(relayPin4, OUTPUT);

  // Set all relays to off (HIGH is off for active low relay)
  digitalWrite(relayPin1, HIGH);
  digitalWrite(relayPin2, HIGH);
  digitalWrite(relayPin3, HIGH);
  digitalWrite(relayPin4, HIGH);

  // Start the DS18B20 sensor
  sensors.begin();
}

void loop() {
  DateTime now = rtc.now();

  lcd.setCursor(0, 0);
  lcd.print("Date: ");
  lcd.print(now.day(), DEC);
  lcd.print('/');
  lcd.print(now.month(), DEC);
  lcd.print('/');
  lcd.print(now.year(), DEC);

  lcd.setCursor(0, 1);
  lcd.print("Time: ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);

  // Read the photoresistor value
  int lightLevel = analogRead(photoResistorPin);

  lcd.setCursor(0, 2);
  lcd.print("Light: ");
  lcd.print(lightLevel);

  // Read temperature from DS18B20 sensor
  sensors.requestTemperatures();
  float temperatureC = sensors.getTempCByIndex(0);

  lcd.setCursor(0, 3);
  lcd.print("Temp: ");
  lcd.print(temperatureC);
  lcd.print(" C");

  // Example logic to control relays based on light level
  // Turn on relays if light level is below a threshold
  int threshold = 500; // Adjust this value as needed

  if (lightLevel < threshold) {
    digitalWrite(relayPin1, LOW); // Turn on relay 1
  } else {
    digitalWrite(relayPin1, HIGH); // Turn off relay 1
  }

  if (lightLevel < threshold) {
    digitalWrite(relayPin2, LOW); // Turn on relay 2
  } else {
    digitalWrite(relayPin2, HIGH); // Turn off relay 2
  }

  if (lightLevel < threshold) {
    digitalWrite(relayPin3, LOW); // Turn on relay 3
  } else {
    digitalWrite(relayPin3, HIGH); // Turn off relay 3
  }

  if (lightLevel < threshold) {
    digitalWrite(relayPin4, LOW); // Turn on relay 4
  } else {
    digitalWrite(relayPin4, HIGH); // Turn off relay 4
  }

  delay(1000);
}