#include <WiFi.h>
#include "time.h"

#define DO_PIN 35    // LDR DO output
#define LED_PIN 33   // LED pin

const char* ssid     = "Wokwi-GUEST";  // WiFi SSID
const char* password = "";             // WiFi password

// NTP server and timezone
const char* ntpServer = "pool.ntp.org";
const long  gmtOffset_sec = 19800;     // GMT+5:30 for India
const int   daylightOffset_sec = 0;

void setup() {
  Serial.begin(115200);
  pinMode(DO_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);

  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected");

  // Initialize NTP
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
}

void loop() {
  // Get current time
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    Serial.println("Failed to obtain time");
    return;
  }

  int hourNow = timeinfo.tm_hour;
  int minuteNow = timeinfo.tm_min;

  // Read LDR
  int lightState = digitalRead(DO_PIN);

  // Only between 6 PM and 6 AM
  bool isNightTime = (hourNow >= 18 || hourNow < 6);

  if (isNightTime && lightState == 0) { // dark + nighttime
    digitalWrite(LED_PIN, HIGH);
    Serial.printf("Time %02d:%02d → Dark + Night → LED ON\n", hourNow, minuteNow);
  } else {
    digitalWrite(LED_PIN, LOW);
    Serial.printf("Time %02d:%02d → Day/Bright → LED OFF\n", hourNow, minuteNow);
  }

  delay(2000);
}