#include <LiquidCrystal.h> // For LCD
#include <TinyGPSPlus.h> // For GPS
#include <SoftwareSerial.h> // For GPS

// Make sure wiring is correct!!
SoftwareSerial gpsSerial(5, 6); // (Rx, Tx)
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
TinyGPSPlus gps;

volatile float degMinutes, degSeconds;
volatile int degDegrees, degMins, degSecs;

const double maxLatitude = 90.0;
const double maxLongitude = 180.0;

double userLatitude = 0.0;
double userLongitude = 0.0;

void setup() {
  Serial.begin(9600);
  gpsSerial.begin(9600);
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Enter Lat & Lon");
}

void loop() {
  if (Serial.available() > 0) {
    getUserInput();
    lcd.clear();
    if (userLatitude > maxLatitude || userLongitude > maxLongitude || userLatitude < -maxLatitude || userLongitude < -maxLongitude) {
      lcd.setCursor(0, 0);
      lcd.print("Out of area");
    } else {
      lcd.setCursor(0, 0);
      lcd.print("In area");
      lcd.setCursor(0, 1);
      lcd.print("Lat: ");
      lcd.print(userLatitude, 6);
      lcd.print(" Lon: ");
      lcd.print(userLongitude, 6);
    }
  }
}

void getUserInput() {
  Serial.print("Enter Latitude: ");
  while (Serial.available() == 0) {}
  userLatitude = Serial.parseFloat();
  Serial.println(userLatitude);
  
  Serial.print("Enter Longitude: ");
  while (Serial.available() == 0) {}
  userLongitude = Serial.parseFloat();
  Serial.println(userLongitude);
}

void convertToDegMinSec(double totalDegrees) {
  degDegrees = (int)totalDegrees;
  degMinutes = totalDegrees - degDegrees;
  degSeconds = 60 * degMinutes;
  degMinutes = (int)degSeconds;
  degMins = (int)degMinutes;
  degSeconds = degSeconds - degMinutes;
  degSeconds = 60 * degSeconds;
  degSecs = (int)degSeconds;
}