#include <SoftwareSerial.h>
#include <LiquidCrystal.h>

// Define the RX and TX pins for the GPS module
#define GPS_RX 10
#define GPS_TX 11

// Define the RX and TX pins for the GSM module
#define GSM_RX 8
#define GSM_TX 9

// Define the analog pin for the potentiometer
#define POTENTIOMETER_PIN A0

// Define the pin for the alert LED
#define ALERT_LED_PIN 13

// Define LCD parameters
#define LCD_RS 12
#define LCD_EN 3
#define LCD_D4 4
#define LCD_D5 5
#define LCD_D6 6
#define LCD_D7 2
#define LCD_COLS 16
#define LCD_ROWS 2

SoftwareSerial gpsSerial(GPS_RX, GPS_TX);
SoftwareSerial gsmSerial(GSM_RX, GSM_TX);
LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);

void setup() {
  Serial.begin(9600);
  gpsSerial.begin(9600);
  gsmSerial.begin(9600);
  
  lcd.begin(LCD_COLS, LCD_ROWS);
  lcd.clear();
  lcd.print("Alcohol Alert");
  delay(1500);
  lcd.setCursor(0, 1);
  lcd.print("Not Detected");
  delay(1500);

  pinMode(ALERT_LED_PIN, OUTPUT);
}

void loop() {
  // Read potentiometer value
  //int threshold = map(analogRead(POTENTIOMETER_PIN), 0, 1023, 0, 1023);
  int threshold = 512;
  // Check if potentiometer value exceeds the threshold
  if (analogRead(POTENTIOMETER_PIN) > threshold) {
    sendAlert();
    displayAlertOnLCD("Alcohol Detected!");
    delay(1500);
    digitalWrite(ALERT_LED_PIN, LOW);
    delay(1000);
  } else {
    displayAlertOnLCD("Not Detected");
    delay(1500);
    digitalWrite(ALERT_LED_PIN, HIGH);
    delay(1000);
  }

  // Handle GPS and GSM functionalities (simulated for Wokwi)
  handleGPS();
  handleGSM();
}

void sendAlert() {
  gsmSerial.println("AT+CMGF=1"); // Set SMS mode to text
  delay(1000);
  displayAlertOnLCD("Sending Message");
  delay(1000);
  displayAlertOnLCD("Mob: 9427961822");
  delay(1000);
  gsmSerial.print("AT+CMGS=\"9427961822\""); // Replace with your phone number
  delay(1000);
  gsmSerial.print("Alcohol Detected! Location: ");
  // You would add GPS location information here
  displayAlertOnLCD("Alcohol Detected! Location: ");
  delay(1000);
  gsmSerial.write(26); // CTRL+Z to send SMS
  delay(1000);
}

void handleGPS() {
  // Simulated GPS reading for Wokwi
  if (gpsSerial.available()) {
    Serial.write(gpsSerial.read());
  }
}

void handleGSM() {
  // Simulated GSM response for Wokwi
  if (gsmSerial.available()) {
    Serial.write(gsmSerial.read());
  }
}

void displayAlertOnLCD(String message) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(message);
  delay(2000);
}