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

// Initialize RTC and LCD
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 columns and 2 rows

// Array for days of the week
char daysOfWeek[7][12] = {
  "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
};

// Pin definition
const int triggerPin = 2; // Pin D2

// Timer variables
unsigned long triggerStartTime = 0; // Store when the pin was activated
bool isTriggered = false; // Ensure it triggers only once
bool isPinActive = false; // Track if the pin is currently active

void setup() {
  Serial.begin(9600);

  // Initialize LCD
  lcd.init();
  lcd.backlight();

  // Set up trigger pin
  pinMode(triggerPin, OUTPUT);
  digitalWrite(triggerPin, LOW); // Ensure it starts LOW

  // Initialize RTC
  if (!rtc.begin()) {
    lcd.print("RTC NOT found!");
    Serial.println("RTC module is NOT found");
    while (1);
  }

  // Manually set the RTC with a specific date & time
  rtc.adjust(DateTime(2025, 1, 28, 6, 34, 55)); // Set to 06:34:55 for testing

  // LCD welcome message
  lcd.setCursor(0, 0);
  lcd.print("RTC Initialized!");
  delay(2000);
  lcd.clear();
}

void loop() {
  // Get current time and date from RTC
  DateTime now = rtc.now();

  // Clear and display date on the first row
  lcd.setCursor(0, 0);
  lcd.print("                "); // Clear the first row
  lcd.setCursor(0, 0);
  lcd.print(now.year());
  lcd.print('/');
  lcd.print(now.month());
  lcd.print('/');
  lcd.print(now.day());

  // Clear and display time and day on the second row
  lcd.setCursor(0, 1);
  lcd.print("                "); // Clear the second row
  lcd.setCursor(0, 1);
  lcd.print(daysOfWeek[now.dayOfTheWeek()]);
  lcd.print(" ");
  lcd.print(now.hour());
  lcd.print(':');
  lcd.print(now.minute());
  lcd.print(':');
  lcd.print(now.second());

  // Trigger pin D2 at 06:35:00 for 3 minutes
  if (now.hour() == 6 && now.minute() == 35 && now.second() == 0 && !isTriggered) {
    digitalWrite(triggerPin, HIGH);       // Activate the pin
    triggerStartTime = millis();          // Record the start time
    isTriggered = true;                   // Ensure it only triggers once
    isPinActive = true;                   // Mark the pin as active
    Serial.println("Trigger ON: 06:35:00");
  }

  // Keep D2 HIGH for 1 minutes (60,000 ms)
  if (isPinActive && millis() - triggerStartTime >= 60000) { // 60000 ms = 1 minutes
    digitalWrite(triggerPin, LOW);        // Deactivate the pin
    isPinActive = false;                  // Reset pin active status
    Serial.println("Trigger OFF: 1 minutes elapsed");
  }

  // Print to Serial Monitor (optional)
  Serial.print("ESP32 RTC Date Time: ");
  Serial.print(now.year());
  Serial.print('/');
  Serial.print(now.month());
  Serial.print('/');
  Serial.print(now.day());
  Serial.print(" (");
  Serial.print(daysOfWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
  Serial.print(now.hour());
  Serial.print(':');
  Serial.print(now.minute());
  Serial.print(':');
  Serial.println(now.second());

  delay(1000); // Update every 1 second
}