#include <DHT.h>
#include <RTClib.h>



RTC_DS3231 rtc;

//structure qui contiendra la date complete a analyser
struct dateTest{

  String date;
  int time;

};

//structure pour connaitre l'etat de la pompe
struct relayPompe{

  bool etat;
  String datetst;
  int timetst;
 
};


//constante contenant les parametres de référence pour l'activation de la pompe
const int TEMP_FONCTIONNEMENT_POMPE = 300;
const int TEMP_MINIMUM_ENTRE_DEUX_ACTIVATION = 3600;
const float TEMP_REFERENCE = 12;



String lastStart = "0";

DateTime now;


float temperatureEnCelsius;


//declaration des structures
struct relayPompe rp = {false,"",0};
struct dateTest dt_test = {"",0};

//déclaration des constantes
#define brocheDeBranchementDHT 2
#define typeDeDHT DHT22 

//instanciation des librairies
DHT dht(brocheDeBranchementDHT, typeDeDHT);


//permet d'afficher les nombres sur deux chiffresstruct
String Vers2Chiffres(byte nombre) {
  String resultat = "";
  if(nombre < 10)
    resultat = "0";
  return resultat += String(nombre,DEC);  
}




struct dateTest formateDate(DateTime date){

  struct dateTest recuperation_date_formatee = {String(date.year(),DEC) + Vers2Chiffres(date.month()) + Vers2Chiffres(date.day()),(date.hour()*3600)+(date.minute()*60)+date.second()};

  return recuperation_date_formatee;
}

void testTemp(){

  temperatureEnCelsius = dht.readTemperature();
  now = rtc.now(); 
  int change = 0 ;

  if(temperatureEnCelsius <= TEMP_REFERENCE){

    dt_test = formateDate(now);

      if(dt_test.date.toInt() == rp.datetst.toInt()){

        if( rp.timetst - dt_test.time > TEMP_MINIMUM_ENTRE_DEUX_ACTIVATION ){

            change = 1;

        }
        
      }
      else change = 1;
    }


  if(change){

    rp.etat = true;
    rp.datetst = dt_test.date;
    rp.timetst = dt_test.time;

  }


}





void setup() {
  


  dht.begin();
  rtc.begin();

  DateTime dt = DateTime(__DATE__, __TIME__);
  rtc.adjust(dt);
}

void loop() {
  
  if(rp.etat == false){
    testTemp();
  }
  else {

    if(dt_test.time - rp.timetst >= TEMP_FONCTIONNEMENT_POMPE){

      rp.etat = false;

    }

}