#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* FIREBASE_HOST = "https://esp32-35a4e-default-rtdb.firebaseio.com/";
const char* FIREBASE_AUTH = "	ceH0OcpT2HmGY8OmQtQH4E6u8bbiUsX6ALT13biR";

#define DHT_PIN  15
#define LAMP_PIN 27

DHT dht(DHT_PIN, DHT22);
bool lampStatus = false; // Initialize lamp status as false (OFF)

void setup() {
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  
  while(WiFi.status() != WL_CONNECTED) {
    Serial.println("Connecting to wifi.........");
    delay(500);
  }
  Serial.println("Connected to wifi");
  dht.begin();
  pinMode(LAMP_PIN, OUTPUT);
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  int den = lampStatus;
  Serial.printf("Humidity: %.2f%%, Temperature: %.2fC\n,Den: %.2fC\n", humidity, temperature, den);
  
  // Create JSON data for the sensor readings
  String sensorData = String("{\"nhiet do\":") + String(temperature) + String(",\"do am\":") + String(humidity) +  String("}");
  
  // Send sensor data to Firebase
  HTTPClient http;
  String url = String(FIREBASE_HOST) + ".json"; // Append .json to Firebase host URL
  http.begin(url);
  http.addHeader("Content-Type", "application/json");
  http.addHeader("Authorization", FIREBASE_AUTH);
  int httpResponseCode = http.PUT(sensorData);

  // Handle response from Firebase
  if (httpResponseCode == 200) {
    Serial.println("----------------------------------");
    Serial.print("Data sent successfully, response code: ");
    Serial.println(httpResponseCode);
    Serial.println("----------------------------------");
  } else {
    Serial.print("Error sending data, response code: ");
    Serial.println(httpResponseCode);
  }
  
  // Control lamp from Firebase
  int httpgetData = http.GET();
  if (httpgetData == 200) {
    String payload = http.getString();
  
    Serial.print("Firebase response: ");
    if (payload.indexOf("\"Den\":\"1\"") != -1) {
      // Lamp should be ON
      if (!lampStatus) {
        digitalWrite(LAMP_PIN, HIGH);
        Serial.println("Lamp is ON");
        lampStatus = true; // Update lamp status
      }
    } else {
      // Lamp should be OFF
      if (lampStatus) {
        digitalWrite(LAMP_PIN, LOW);
        Serial.println("Lamp is OFF");
        lampStatus = false; // Update lamp status
      }
    }
  } else {
    Serial.print("Error getting data from Firebase, HTTP error code: ");
    Serial.println(httpResponseCode);
  }

  http.end();
  delay(5000); // Delay between readings
}