#include <LiquidCrystal_I2C.h>
#include <TM1637Display.h>
#include <Wire.h>
#include "RTClib.h"

#define LCD_ADDRESS 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2
#define LED_PIN 13
#define PIN_TRIG 2
#define PIN_ECHO 3
#define TRIGGER_DISTANCE 100 // dalam cm

LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);
RTC_DS1307 rtc;
TM1637Display display(4, 5); // CLK, DIO

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);

  lcd.init();
  lcd.backlight();
  display.setBrightness(0x0f);

  Serial.begin(9600);
  Wire.begin();

  // Set RTC time jika tidak berjalan
  if (!rtc.begin()) {
    Serial.println("RTC tidak ditemukan!");
    while (1);
  }

  if (!rtc.isrunning()) {
    Serial.println("RTC tidak berjalan, setting waktu...");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  // Tampilkan nama dan NIM selama 3 detik
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Selamat!");
  lcd.setCursor(0, 1);
  lcd.print("Nama: [Nama]");
  delay(3000);
}

void loop() {
  // Baca jarak dari sensor ultrasonik
  digitalWrite(PIN_TRIG, LOW);
  delayMicroseconds(2);
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);
  long duration = pulseIn(PIN_ECHO, HIGH);
  int distance = duration * 0.034 / 2;

  // Tampilkan jarak pada 7 segmen
  display.showNumberDecEx(distance, 0b01000000, true); // Tampilkan hanya angka
  delay(1000);

  // Baca waktu dari RTC
  DateTime now = rtc.now();

  // Tampilkan waktu pada LCD baris 0
  lcd.setCursor(0, 0);
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  lcd.print(now.minute(), DEC);
  lcd.print(":");
  lcd.print(now.second(), DEC);

  // Tampilkan kondisi LED pada LCD baris 1
  if (distance > TRIGGER_DISTANCE || now.second() < 15) {
    lcd.setCursor(0, 1);
    lcd.print("LED: NYALA");
    digitalWrite(LED_PIN, HIGH);
  } else {
    lcd.setCursor(0, 1);
    lcd.print("LED: MATI ");
    digitalWrite(LED_PIN, LOW);
  }

  delay(1000);
}