#define BLYNK_TEMPLATE_ID "TMPL6MtRMXr09"
#define BLYNK_TEMPLATE_NAME "lampu otomatis"
#define BLYNK_AUTH_TOKEN "7ermN_WTuQ-5NdR0-H9kvbtwAZnI4qLA"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <NTPClient.h>
#include <WiFiUdp.h>

// Pin setup
#define LDR_PIN 34
#define BUZZER_PIN 13
#define RELAY_PIN 23

// LCD Setup (I2C)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// NTP Client setup
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", 3600, 60000);

// Alarm Variables
bool alarmActive = false;
int alarmTime = 0;

// Lamp Control
bool lampStatus = false;

void setup() {
  Serial.begin(115200);
  
  pinMode(LDR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  
  lcd.begin(16, 2);
  lcd.setBacklight(1);
  lcd.print("Initializing...");

  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  timeClient.begin();
}

void loop() {
  Blynk.run();
  timeClient.update();

  int ldrValue = analogRead(LDR_PIN);
  int threshold = 500;

  // Lamp control (auto mode)
  if (!lampStatus) {
    if (ldrValue < threshold) {
      digitalWrite(RELAY_PIN, HIGH);
    } else {
      digitalWrite(RELAY_PIN, LOW);
    }
  }

  // Alarm control
  if (alarmActive && timeClient.getEpochTime() >= alarmTime) {
    digitalWrite(BUZZER_PIN, HIGH);
  } else {
    digitalWrite(BUZZER_PIN, LOW);
  }

  // LCD display
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Time:");
  lcd.print(timeClient.getFormattedTime());
  lcd.setCursor(0,1);
  lcd.print("LDR:");
  lcd.print(ldrValue);

  // Kirim data ke Blynk (opsional)
  Blynk.virtualWrite(V4, ldrValue);

  delay(1000);
}

// Blynk Control
BLYNK_WRITE(V1) {
  alarmTime = param.asInt();
}

BLYNK_WRITE(V2) {
  alarmActive = param.asInt();
}

BLYNK_WRITE(V3) {
  lampStatus = param.asInt();
  if (lampStatus) {
    digitalWrite(RELAY_PIN, HIGH);
  } else {
    digitalWrite(RELAY_PIN, LOW);
  }
}