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

#define DHTPIN 4  // GPIO for DHT22
#define DHTTYPE DHT22
#define LDR_PIN 34 // Analog pin for LDR

DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* serverURL ="https://ec78-2409-40f4-201d-957b-c471-b708-b377-ccce.ngrok-free.app/data";

void setup() {
   Serial.begin(115200);
    WiFi.begin(ssid, password);

    int attempts = 0;
    while (WiFi.status() != WL_CONNECTED && attempts < 20) { 
        delay(1000);
        Serial.print(".");
        attempts++;
    }

    if (WiFi.status() == WL_CONNECTED) {
        Serial.println("\nConnected!");
    } else {
        Serial.println("\nFailed to connect. Restarting...");
        ESP.restart();
    }

  dht.begin();
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    int lightIntensity = analogRead(LDR_PIN);

    if (isnan(temperature) || isnan(humidity)) {
      Serial.println("Failed to read from DHT sensor!");
      return;
    }

    // Construct JSON payload
    String payload = "{\"temperature\":" + String(temperature) +
                     ", \"humidity\":" + String(humidity) +
                     ", \"light\":" + String(lightIntensity) + "}";

    http.begin(serverURL); // Initialize HTTP connection
    http.addHeader("Content-Type", "application/json"); // Ensure correct format

    int httpResponseCode = http.POST(payload); // Send data
    Serial.println("Data Sent: " + payload);
    Serial.println("Response: " + String(httpResponseCode));

    http.end(); // Close connection
  }

  delay(5000); // Wait before the next request to prevent overload
}