#include <GSM.h>

#define PINNUMBER ""

GSM gsmAccess;
GSM_SMS sms;

int thresholds;
int lightThresholds;
int tempMIN;
int tempMAX;
int lightMIN;
int lightMAX;
char senderNumber[20];
char remoteNum[20] = "+48723999962";
String txtMenu = "1 - Currently temperature| 2 - set MIN, MAX temperature| 3 -   ";
String error = "Something is wrong Senior !";


void setup() {
  Serial.begin(9600);
  while (!Serial) {
  }

  Serial.println(" Welcome in heating mobile remote");
  Serial.println(" Checking connection of GSM signal...");

  // connection state
  boolean notConnected = true;

  // Start GSM connection
  while (notConnected) {
    if (gsmAccess.begin(PINNUMBER) == GSM_READY) {
      notConnected = false;
    } else {
      Serial.println("Not connected");
      delay(1000);
    }
  }
  Serial.println(" Authorization has been successful");
  sendMenu();
}

void loop() {
  char menu[4];
  String msg = "";
  int tempMIN, tempMAX;
  if (sms.available()) {
    Serial.println("Message received from:");

    sms.remoteNumber(senderNumber, 20);
    Serial.println(senderNumber);

    if (sms.peek() == '#') {
      Serial.println("Discarded SMS");
      sms.flush();
    }

    while (char tmp = sms.read()) {
      msg += tmp;
    }
    Serial.println(msg);

    msg.toCharArray(menu, 4);
    switch (menu[0]) {
      case '1':
        Serial.println("Send cur temp");
        break;
      case '2':
        int mintmp ;
        int maxtmp;
        mintmp = msg.substring(2, 4).toInt();
        maxtmp = msg.substring(5, 7).toInt();

        if (mintmp < maxtmp && mintmp > 0 && maxtmp > 0) {
          tempMIN = mintmp;
          tempMAX = maxtmp;
        } else {
          SmsError();
        }


        break;
      case '3':
        thresholds = msg.substring(2, 4).toInt();
      default:
        Serial.println("Wrong Command");
        break;
    }

    // Delete message from modem memory
    sms.flush();
    Serial.println("MESSAGE DELETED");
  }

  delay(1000);

}

int settemp(int x, int y) {


}

int SendTemp() {
  sms.beginSMS(remoteNum);
  sms.print(txtMenu);
  sms.endSMS();
  Serial.print("end ");
}


void sendMenu() {

  sms.beginSMS(remoteNum);
  sms.print(txtMenu);
  sms.endSMS();
  Serial.print("end ");


}

void SmsError() {

  sms.beginSMS(remoteNum);
  sms.print(error);
  sms.endSMS();
  Serial.print("end ");


}


int readSerial(char result[]) {
  int i = 0;
  while (1) {
    while (Serial.available() > 0) {
      char inChar = Serial.read();
      if (inChar == '\n') {
        result[i] = '\0';
        Serial.flush();
        return 0;
      }
      if (inChar != '\r') {
        result[i] = inChar;
        i++;
      }
    }
  }
}