#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);
bool first, second, thert;
unsigned long previousMillis = 0;
const long interval = 1000, but = 10000;
unsigned long currentMillis;
const int firstButtonPin = 3,secondButtonPin = 6, thertButtonPin = 5;
bool buttonState,relNow,relStop;
bool firstLastButtonState = HIGH, secondLastButtonState = HIGH, thirtLastButtonState = HIGH;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;
int hourStop = 23,minuteStop = 59,secondStop = 0,
  hourStart = 0,minuteStart = 0,
  secondStart = 0,lastPress=0;
int releStop = 0,pressPreviousMillis = 0,pressCurentMillis = 0;
bool minuteTrue = false,press = false;

void setup() {
  lcd.begin(16, 1);
    if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  pinMode(firstButtonPin, INPUT_PULLUP);
  pinMode(secondButtonPin, INPUT_PULLUP);
  pinMode(thertButtonPin, INPUT_PULLUP);
  pinMode(A4, INPUT);
  pinMode(A5, INPUT);
  pinMode(2,INPUT);
  Serial.begin(115200);
}

bool btnState(bool button, bool lastButtonState){
  bool btn_satate = button;
      if (btn_satate != lastButtonState) {
    lastDebounceTime = millis();
  }
    if ((millis() - lastDebounceTime) > debounceDelay) {
      if (btn_satate != buttonState) {
      buttonState = btn_satate;
    }
  }
  if(button != lastButtonState){
    return true;
  }else{
    return false;
}
  lastButtonState = btn_satate;
}

void firstButton(){
      DateTime now = rtc.now();
    currentMillis = millis();
      printTime();
      previousMillis = currentMillis;
      q:currentMillis = millis();
      if (currentMillis - previousMillis >= but){
      }
      else{
        if(btnState(digitalRead(firstButtonPin),firstLastButtonState)){
              firstButton();
        }
        goto q;
      }

}

void printTime(){
  lcd.clear();
  lcd.setCursor(0,0);
    lcd.print("T.ON-");
    lcd.print(hourStart);
    lcd.print(':');
    lcd.print(minuteStart);
    lcd.print(':');
    lcd.print(secondStart);
    lcd.setCursor(0,1);
    lcd.print("T.OFF-");
    lcd.print(hourStop);
    lcd.print(':');
    lcd.print(minuteStop);
    lcd.print(':');
    lcd.print(secondStop);
}

void timer(){
    q:currentMillis = millis();
    DateTime now = rtc.now();
  if (currentMillis - previousMillis >= interval) {
    printTime();
      if(btnState(digitalRead(secondButtonPin),secondLastButtonState)){
    if(minuteTrue == true){
    if (minuteStart > 59){
        minuteStart = 0;
    }else{
        minuteStart += 1;
     }
    }else{
    if (hourStart > 23){
      hourStart = 0;
    }else{
      hourStart += 1;
     }
    goto q;
    }
  }
  else if(btnState(digitalRead(thertButtonPin),thirtLastButtonState)){
    if(minuteTrue == true){
      if (minuteStart < 1){
        minuteStart = 59;
      }else{
        minuteStart -= 1;
      }
    }else{
    if (hourStart < 1){
        hourStart = 23;
    }else{
        hourStart -= 1;
     }  
    }
  }
    previousMillis = currentMillis;
  }
  else if(btnState(digitalRead(firstButtonPin),firstLastButtonState)){
    pressPreviousMillis = pressCurentMillis;
    while (btnState(digitalRead(firstButtonPin),firstLastButtonState)){
      pressCurentMillis = millis();
      if(pressCurentMillis - pressPreviousMillis >= interval){
        press = true;
      }
      else{
        press = false;
      }
      btnState(digitalRead(firstButtonPin),firstLastButtonState);
    }
    if(press == true){
      if(minuteTrue != true){
        minuteTrue = true;
      }
      else{
        minuteTrue = false;
      }
    }
    else{
      goto exit;
    }
  }
    goto q;
    exit:;
}

void loop() {
  DateTime now = rtc.now();
  currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
      lcd.clear();
      lcd.print(now.hour(), DEC);
      lcd.print(':');
      lcd.print(now.minute(), DEC);
      lcd.print(':');
      lcd.print(now.second(), DEC);
      previousMillis = currentMillis;
      if(hourStart <= now.hour() & minuteStart <= now.minute() & 
      minuteStart >= now.minute() & hourStop >= now.hour()){
        digitalWrite(2, HIGH);
      }
      else{
        digitalWrite(2, LOW);
      }
    }
    pressPreviousMillis = pressCurentMillis;
    if(btnState(digitalRead(firstButtonPin),firstLastButtonState)){
      while (btnState(digitalRead(firstButtonPin),firstLastButtonState)){
        pressCurentMillis = millis();
        if(pressCurentMillis - pressPreviousMillis >= interval){
          press = true;
        }
        else{
          press = false;
        }
        btnState(digitalRead(firstButtonPin),firstLastButtonState);
      }
      if(press != true){
        firstButton();
      }
      else{
        timer();
      }
    }
}