#include <LiquidCrystal_I2C.h>
#include "RTClib.h"
LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS1307 rtc;
void setup() {
  rtc.begin();
  pinMode(13, OUTPUT);
  pinMode(8, INPUT_PULLUP);
  pinMode(9, INPUT_PULLUP);
  pinMode(10, INPUT_PULLUP);
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
}
////////////Current Time
int h = 00; //กำหนด
int m = 00;
int s = 00;
int st = 0;
int h1 = 00; //กำหนด Start
int m1 = 00;
int s1 = 00;
int h2 = 00; //กำหนด Stop
int m2 = 00;
int s2 = 00;

void loop() {

  int sw1 = digitalRead(8);
  delay(500);
  if (sw1 == 0) {
    st++;
    Serial.println(st);
    if (st >= 7) {
      st = 0;
      lcd.clear();
    }
  }
  if (st == 0) {
    time();
    check();
  }
  else {
    start();
    stop();

  }

}


// end loop

void start() {   ////////////////////////////////////////////Start

  if (st == 1) { //ตั้ง ชม.
    int sw2 = digitalRead(9); // Up
    delay(100);

    if (sw2 == 0) {
      h1++;
      if (h1 >= 24) {
        h1 = 0;
      }
    }

    int sw3 = digitalRead(10); /////////////////////////// Down
    delay(50);

    if (sw3 == 0) {
      h1--;
      if (h1 <= -1) {
        h1 = 23;
      }

    }
    lcd.setCursor(6, 0); //แสดงกระพริบตำแหน่่ง ชม.
    lcd.print("  ");
    delay(500);
  }
  if (st == 2) { //ตั้ง นาที
    int sw2 = digitalRead(9); // Up
    delay(50);

    if (sw2 == 0) {
      m1++;
      if (m1 >= 60) {
        m1 = 0;
      }

    }
    int sw3 = digitalRead(10); /////////////////////////// Down
    delay(50);

    if (sw3 == 0) {
      m1--;
      if (m1 <= 0) {
        m1 = 59;
      }

    }

    lcd.setCursor(9, 0); //แสดงกระพริบตำแหน่่ง ชม.
    lcd.print("  ");
    delay(500);
  }
  if (st == 3) { //ตั้ง วินาที
    int sw2 = digitalRead(9); // Up
    delay(100);

    if (sw2 == 0) {
      s1++;
      if (s1 >= 60) {
        s1 = 0;
      }

    }
    int sw3 = digitalRead(10); /////////////////////////// Down
    delay(50);

    if (sw3 == 0) {
      s1--;
      if (s1 <= 0) {
        s1 = 59;
      }

    }

    lcd.setCursor(12, 0); //แสดงกระพริบตำแหน่่ง ชม.
    lcd.print("  ");
    delay(500);
  }


  lcd.setCursor(0, 0);
  lcd.print("Start");
  ///////////////////////////Hour
  lcd.setCursor(6, 0);
  if (h1 <= 9) {
    lcd.print("0");
  }
  lcd.print(h1);
  lcd.setCursor(8, 0);
  lcd.print(":");
  ///////////////////////////Minute
  lcd.setCursor(9, 0);
  if (m1 <= 9) {
    lcd.print("0");
  }


  lcd.print(m1);
  ///////////////////////////Minute
  lcd.setCursor(11, 0);
  lcd.print(":");
  lcd.setCursor(12, 0);
  if (s1 <= 9) {
    lcd.print("0");
  }

  lcd.print(s1);
}

void stop() { /////////////////////////////////////////Stop
  if (st == 4) { //ตั้ง ชม.
    int sw2 = digitalRead(9); // Up
    delay(100);

    if (sw2 == 0) {
      h2++;
      if (h2 >= 24) {
        h2 = 0;
      }

    }

    int sw3 = digitalRead(10); /////////////////////////// Down
    delay(50);

    if (sw3 == 0) {
      h2--;
      if (h2 <= -1) {
        h2 = 23;
      }

    }

    lcd.setCursor(6, 1); //แสดงกระพริบตำแหน่่ง ชม.
    lcd.print("  ");
    delay(500);
  }
  if (st == 5) { //ตั้ง นาที
    int sw2 = digitalRead(9); // Up
    delay(50);

    if (sw2 == 0) {
      m2++;
      if (m2 >= 60) {
        m2 = 0;
      }

    }
    int sw3 = digitalRead(10); /////////////////////////// Down
    delay(50);

    if (sw3 == 0) {
      m2--;
      if (m2 <= 0) {
        m2 = 59;
      }

    }

    lcd.setCursor(9, 1); //แสดงกระพริบตำแหน่่ง ชม.
    lcd.print("  ");
    delay(500);
  }
  if (st == 6) { //ตั้ง วินาที
    int sw2 = digitalRead(9); // Up
    delay(50);

    if (sw2 == 0) {
      s2++;
      if (s2 >= 60) {
        s2 = 0;
      }

    }

    int sw3 = digitalRead(10); /////////////////////////// Down
    delay(50);

    if (sw3 == 0) {
      s2--;
      if (s1 <= 0) {
        s2 = 59;
      }

    }

    lcd.setCursor(12, 1); //แสดงกระพริบตำแหน่่ง ชม.
    lcd.print("  ");
    delay(500);
  }
  lcd.setCursor(0, 1);
  lcd.print("Stop");
  ///////////////////////////Hour
  lcd.setCursor(6, 1);
  if (h2 <= 9) {
    lcd.print("0");
  }
  lcd.print(h2);
  lcd.setCursor(8, 1);
  lcd.print(":");
  ///////////////////////////Minute
  lcd.setCursor(9, 1);
  if (m2 <= 9) {
    lcd.print("0");
  }
  lcd.print(m2);
  ///////////////////////////Second
  lcd.setCursor(11, 1);
  lcd.print(":");
  lcd.setCursor(12, 1);
  if (s2 <= 9) {
    lcd.print("0");
  }
  lcd.print(s2);
}
////////////////////////////////////Function Time
void time() {

  DateTime now = rtc.now();

  ////////////////////////////อ่านเวลามาจาก rtc
  h = now.hour();
  m = now.minute();
  s = now.second();
  //////////แสดง lcd ที่แถว 0
  lcd.setCursor(0, 0);
  lcd.print("Time");
  ///////////////////////////Hour
  lcd.setCursor(6, 0);
  if (h <= 9) {
    lcd.print("0");
  }
  lcd.print(h);
  lcd.setCursor(8, 0);
  lcd.print(":");
  ///////////////////////////Minute
  lcd.setCursor(9, 0);
  if (m <= 9) {
    lcd.print("0");
  }


  lcd.print(m);
  ///////////////////////////Minute
  lcd.setCursor(11, 0);
  lcd.print(":");
  lcd.setCursor(12, 0);
  if (s <= 9) {
    lcd.print("0");
  }

  lcd.print(s);


}

void check() {
  if (h == h1 && m == m1) {
    digitalWrite(13, HIGH);
  }
  if (h == h2 && m == m2) {
    digitalWrite(13, 0);
  }

}