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

// Initialize LCD with address 0x27 (change to 0x3F if needed)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Pin Definitions
const int alcoholPin = A0;
const int ignitionInput = 2;    
const int helmetInput = 3;      
const int engineRelay = 4;      
const int fuelRelay = 5;        

const int alcoholThreshold = 200;

void setup() {
  lcd.begin(16, 2);
  lcd.backlight();

  pinMode(ignitionInput, INPUT_PULLUP);
  pinMode(helmetInput, INPUT_PULLUP);
  pinMode(engineRelay, OUTPUT);
  pinMode(fuelRelay, OUTPUT);

  digitalWrite(engineRelay, LOW);
  digitalWrite(fuelRelay, LOW);

  lcd.setCursor(0, 0);
  lcd.print("Bike Safety Init");
  delay(2000);
  lcd.clear();
}

void loop() {
  int alcoholLevel = analogRead(alcoholPin);
  bool ignitionOn = digitalRead(ignitionInput) == LOW;
  bool helmetOn = digitalRead(helmetInput) == LOW;

  if (ignitionOn) {
    if (alcoholLevel > alcoholThreshold) {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("WARNING:");
      lcd.setCursor(0, 1);
      lcd.print("Alcohol Detected");
      delay(5000);
      engineOff();
    }
    else if (!helmetOn) {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("WARNING:");
      lcd.setCursor(0, 1);
      lcd.print("Wear Helmet");
      delay(5000);
      engineOff();
    }
    else {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Engine ON");
      lcd.setCursor(0, 1);
      lcd.print("Fuel Lock ON");
      digitalWrite(engineRelay, HIGH);
      digitalWrite(fuelRelay, HIGH);
    }
  } else {
    engineOff();
  }

  delay(500);
}

void engineOff() {
  digitalWrite(engineRelay, LOW);
  digitalWrite(fuelRelay, LOW);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Engine OFF");
  lcd.setCursor(0, 1);
  lcd.print("Fuel Locked");

  delay(2000);

}