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

// Set the LCD address to 0x27 for a 16x2 display
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Pin definitions
const int relayPin = 8;
const int redLEDPin = 10;
const int greenLEDPin = 11;

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.backlight();
  
  // Initialize the pins
  pinMode(relayPin, OUTPUT);
  pinMode(redLEDPin, OUTPUT);
  pinMode(greenLEDPin, OUTPUT);
  
  // Initialize the relay and LEDs off
  digitalWrite(relayPin, LOW);
  digitalWrite(redLEDPin, LOW);
  digitalWrite(greenLEDPin, LOW);
}

void loop() {
  // Relay off for 1 hour (3600 seconds)
  controlRelayAndDisplay(false, 3600);
  
  // Relay on for 10 seconds
  controlRelayAndDisplay(true, 10);
}

void controlRelayAndDisplay(bool relayState, int duration) {
  unsigned long startTime = millis();
  
  while (millis() - startTime < duration * 1000) {
    unsigned long currentTime = millis();
    int elapsedTime = (currentTime - startTime) / 1000;
    int remainingTime = duration - elapsedTime;
    
    if (relayState) {
      // Relay on, green LED slower blink
      digitalWrite(relayPin, HIGH);
      digitalWrite(greenLEDPin, millis() % 400 < 200 ? HIGH : LOW); // Blink every 200ms
      digitalWrite(redLEDPin, LOW);
      lcd.setCursor(0, 0);
      lcd.print("Valve Open    ");
    } else {
      // Relay off, red LED slow blink
      digitalWrite(relayPin, LOW);
      digitalWrite(greenLEDPin, LOW);
      digitalWrite(redLEDPin, millis() % 1000 < 500 ? HIGH : LOW); // Blink every 500ms
      lcd.setCursor(0, 0);
      lcd.print("Valve Closed  ");
    }
    
    // Display remaining time in hours and minutes
    int hours = remainingTime / 3600;
    int minutes = (remainingTime % 3600) / 60;
    int seconds = remainingTime % 60;

    lcd.setCursor(0, 1);
    lcd.print("Time: ");
    lcd.print(hours);
    lcd.print("h ");
    lcd.print(minutes);
    lcd.print("m ");
    lcd.print(seconds);
    lcd.print("s     ");
  }
}