#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <Wire.h>
#include <DHT.h>

#define pinDHT 5
#define typDHT22 DHT22
DHT DHT(pinDHT, typDHT22);
int minuty;
int hodiny;
bool change = 0;
byte krajta = 0;
DateTime blbec;

LiquidCrystal_I2C lcd(0x27,16,2);
RTC_DS1307 RTC;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  RTC.begin();
  DHT.begin();

  pinMode(9, INPUT_PULLUP);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  RTC.adjust(DateTime(__DATE__, __TIME__));
}

void loop() {
  // put your main code here, to run repeatedly:
    
    blbec = RTC.now();
    float tep = DHT.readTemperature();
    if(!digitalRead(11))
    {
    change = true;
    krajta = 1;
    delay(250);
    }

   

    if (!change){
    Time();
    }

    if (change){
      switch(krajta){
        case 1: eminutes();
        break;
        case 2: ehours();
        break;
        case 3: ok();
        break;
      }

    }
 
  }



void Time()
{
    minuty = blbec.minute();
    hodiny = blbec.hour();

    float tep = DHT.readTemperature();
    lcd.setCursor(0,0); 
    lcd.print("Time ");
    lcd.print(hodiny < 10 ? "0" + String(hodiny) : hodiny);
    lcd.print(":");
    lcd.print(minuty < 10 ? "0" + String(minuty) : minuty);
    lcd.setCursor(0,1);
    lcd.print("Temp ");
    lcd.print(tep);
    lcd.print("C");
    
}

void eminutes(){
    lcd.setCursor(0,0);
    lcd.print(" ");
    lcd.print("EDITING MINUTES");
    lcd.setCursor(0,1);
    lcd.print(hodiny < 10 ? "0" + String(hodiny) : hodiny);
    lcd.print(":");
    lcd.print(minuty < 10 ? "0" + String(minuty) : minuty);
    lcd.print("            ");

    if (!digitalRead(10)){
      minuty--;
      minuty < 0 ? minuty = 59 : minuty;
      delay (200);
    }

    if (!digitalRead(9)){
      minuty++;
      minuty > 59 ? minuty = 0 : minuty;
      delay (200);
    }

    if (!digitalRead(11)){
      delay(200);
      krajta = 2;
      
    }
}

void ehours(){
      lcd.setCursor(0,0);
    lcd.print("  ");
    lcd.print("EDITING HOURS ");
    lcd.setCursor(0,1);
    lcd.print(hodiny < 10 ? "0" + String(hodiny) : hodiny);
    lcd.print(":");
    lcd.print(minuty < 10 ? "0" + String(minuty) : minuty);
  

  if (!digitalRead(10)) {
    hodiny--;
    hodiny < 0 ? hodiny = 23 : hodiny;
    hodiny > 23 ? hodiny = 0 : hodiny;
    delay (200);

  }

  if (!digitalRead(9)){
      hodiny++;
      hodiny > 59 ? hodiny = 0 : hodiny;
      delay (200);
  }

      if (!digitalRead(11)){
      delay(200);
      krajta = 3;
      

}
}

void ok(){
     lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("       OK");
    lcd.setCursor(0, 1);
    lcd.print("Got it");
  krajta=0;
  RTC.adjust(DateTime(blbec.year(), blbec.month(), blbec.day(), hodiny, minuty, blbec.second()));
  delay(1000);
  change = false;
  lcd.clear();
  loop();
}