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

#define Relay1 13
#define vr 35
#define DHTPIN 27
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);

unsigned long lastActivationTime = 0;
const unsigned long activationInterval = 10 * 1000; // 10 seconds
const unsigned long deactivationDelay = 3 * 1000;   // 3 seconds
const unsigned long lcdUpdateInterval = 1000;      // Update LCD every 1 second

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  pinMode(Relay1, OUTPUT);
  dht.begin();
  Wire.begin();
  rtc.begin();
  lcd.init();
  lcd.backlight();
}

void loop() {
  unsigned long currentMillis = millis();

  float humidity = dht.readHumidity();
  int val = analogRead(vr);
  float v = (5.0 / 1023.0) * val;
  DateTime now = rtc.now();

  // Check if it's time to activate the relay
  if (currentMillis - lastActivationTime >= activationInterval) {
    digitalWrite(Relay1, HIGH); // Activate Relay (assuming it's active-high)
    lastActivationTime = currentMillis;
  }

  // Check if it's time to deactivate the relay
  if (currentMillis - lastActivationTime >= deactivationDelay) {
    digitalWrite(Relay1, LOW); // Deactivate Relay after delay
  }

  // Update Serial and LCD status every second
  if (currentMillis % lcdUpdateInterval == 0) {
    Serial.print("Temperature: ");
    Serial.print(dht.readTemperature(), 1); // Print temperature with one decimal place
    Serial.print(" °C, Humidity: ");
    Serial.print(humidity); // Print humidity without decimal places
    Serial.print("%, Potentiometer: ");
    Serial.print(v); // Print potentiometer voltage
    Serial.print(" V, Time: ");
    Serial.print(now.hour(), DEC);
    Serial.print(":");
    Serial.print(now.minute(), DEC);
    Serial.print(":");
    Serial.print(now.second(), DEC);
    Serial.print(", Relay Status: ");
    Serial.println(digitalRead(Relay1) == HIGH ? "ON" : "OFF");

    // Map val to 0-100% but cap at 100%
    float valPercentage = map(val, 0, 1023, 0, 100);
    // Ensure valPercentage doesn't exceed 100%
    if (valPercentage > 100) {
      valPercentage = 100;
    }

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("H:");
    lcd.print((int)humidity); // Print humidity without decimal places
    lcd.print("% T:");
    lcd.print(now.hour(), DEC); // Print hour
    lcd.print(":");
    lcd.print(now.minute(), DEC); // Print minute
    lcd.print(":");
    lcd.print(now.second(), DEC); // Print second
    lcd.setCursor(0, 1);
    lcd.print("Pot:");
    lcd.print(valPercentage); // Print potentiometer percentage
    lcd.print("% R:");
    lcd.print(digitalRead(Relay1) == HIGH ? "ON" : "OFF");
  }
}