#include <TinyGPSPlus.h>
#include <SoftwareSerial.h>


#define rainSensorPin  2
#define buzzer 3
#define led 4
static const int RXPin = 6, TXPin = 5;
String s = "www.google.com/maps/dir/";
unsigned long interval = 10000;
static const uint32_t GPSBaud = 9600;
unsigned long previousMillis = 0;
String Lat = "";
String Lng = "";
int SendSMS_Now = 0;

const size_t BUFSIZE = 300;
char f_buffer[BUFSIZE];
float *f_buf = (float*)f_buffer;

TinyGPSPlus gps;// The TinyGPSPlus object
SoftwareSerial ss(RXPin, TXPin);// The serial connection to the GPS device


void setup()
{
  Serial.begin(9600);
  pinMode(rainSensorPin, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);
  pinMode(led, OUTPUT);
  setupA9G();
  Serial.println("Setup Executed");
  attachInterrupt(digitalPinToInterrupt(rainSensorPin), send_SMS_NOW, CHANGE);

}

void send_SMS_NOW() {
  SendSMS_Now = 1;
}

void loop() {
  readGPS_Data();
  if (SendSMS_Now == 1) {
    get_gps_data();
    digitalWrite(buzzer, HIGH);
    digitalWrite(led, HIGH);
    sendSMSwithLocation1();
    delay(2000);
    sendSMSwithLocation2();
    delay(2000);
    sendSMSwithLocation3();
    delay(2000);
    s = "www.google.com/maps/dir/";
    SendSMS_Now = 0;
  }
  digitalWrite(buzzer, LOW);
  digitalWrite(led, LOW);
  //send_gps_data();

}

static void smartDelay(unsigned long ms)
{
  unsigned long start = millis();
  do
  {
    while (ss.available())
      gps.encode(ss.read());
  } while (millis() - start < ms);
}

void get_gps_data(){
  /*if (gps.location.lat() == 0 || gps.location.lng() == 0)
    {
    Serial.println("Return Executed");
    return;
    }*/
  Serial.print("Latitude (deg): ");
  Lat = String(gps.location.lat(), 6);
  Serial.println(Lat);
  Serial.print("Longitude (deg): ");
  Lng = String(gps.location.lng(), 6);
  Serial.println(Lng);
  Serial.println();
  s += String(gps.location.lat(), 6);
  s += ",";
  s += String(gps.location.lng(), 6);
  s += "/";
  Serial.println(s);
}


void setupA9G() {
  ss.begin(GPSBaud);
  Serial.println("Starting...");
  ss.println("\r");
  ss.println("AT\r");
  delay(10);
  ss.println("\r");
  ss.println("AT+GPS=1\r");
  delay(100);
  ss.println("AT+CREG=2\r");
  delay(6000);
  //ss.print("AT+CREG?\r");
  ss.println("AT+CGATT=1\r");
  delay(6000);
  ss.println("AT+CGDCONT=1,\"IP\",\"WWW\"\r");
  delay(6000);
  // ss.println("AT+LOCATION=1\r");
  ss.println("AT+CGACT=1,1\r");
  delay(6000);
  //Initialize ends
  //Initialize GPS
  ss.println("\r");
  ss.println("AT+GPS=1\r");
  delay(1000);
  //ss.println("AT+GPSMD=1\r");   // Change to only GPS mode from GPS+BDS, set to 2 to revert to default.
  ss.println("AT+GPSRD=10\r");
  delay(100);
  // set SMS mode to text mode
  ss.println("AT+CMGF=1\r");
  delay(1000);
  //ss.println("AT+LOCATION=2\r");

}

/////////////////////////////////////////////////////////
void sendSMSwithLocation1() {
  Serial.println("Sending Message");
  ss.println("AT+CMGF=1\r");
  delay(1000);
  ss.println("AT+CNMI=2,2,0,0,0\r");
  delay(1000);
  ss.print("AT+CMGS=\"+966541755469\"\r");//Replace this with your mobile number
  delay(1000);
  ss.print("Warning - Water Leak Detected \n");
  ss.print(s);
  ss.write(0x1A);
  delay(1000);
}
void sendSMSwithLocation2() {
  Serial.println("Sending Message");
  ss.println("AT+CMGF=1\r");
  delay(1000);
  ss.println("AT+CNMI=2,2,0,0,0\r");
  delay(1000);
  ss.print("AT+CMGS=\"+966556754045\"\r");//Replace this with your mobile number
  delay(1000);
  ss.print("Warning - Water Leak Detected \n");
  ss.print(s);
  ss.write(0x1A);
  delay(1000);
}
void sendSMSwithLocation3() {
  Serial.println("Sending Message");
  ss.println("AT+CMGF=1\r");
  delay(1000);
  ss.println("AT+CNMI=2,2,0,0,0\r");
  delay(1000);
  ss.print("AT+CMGS=\"+966501914144\"\r");//Replace this with your mobile number
  delay(1000);
  ss.print("Warning - Water Leak Detected \n");
  ss.print(s);
  ss.write(0x1A);
  delay(1000);
}
/////////////////////////////////////////////////////////

void readGPS_Data() {
  smartDelay(2000);
  if (millis() > 5000 && gps.charsProcessed() < 10)
    Serial.println(F("No GPS data received: check wiring"));

}