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

// --------------------------
// DHT22 setup
// --------------------------
#define DHTPIN 9      // Connect DATA pin of DHT22 to GPIO15
#define DHTTYPE DHT22   // Sensor type

DHT dht(DHTPIN, DHTTYPE);

// --------------------------
// Wi-Fi setup (Wokwi simulator)
// --------------------------
const char* ssid = "Wokwi-GUEST";  // Wokwi default Wi-Fi
const char* password = "";          // No password

// --------------------------
// Server URL (replace with your ngrok HTTPS URL + /upload)
// --------------------------
const char* serverUrl = "https://4f463da9d9a7.ngrok-free.app/upload";

void setup() {
  Serial.begin(115200);

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\n✅ WiFi connected!");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  // Start DHT22
  dht.begin();
  delay(2000); // wait 2s before first read
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    float temp = dht.readTemperature();
    float hum = dht.readHumidity();

    if (!isnan(temp) && !isnan(hum)) {
      HTTPClient http;

      // HTTPS bypass for ngrok (no SSL verification)
      http.begin(serverUrl, "");

      http.addHeader("Content-Type", "application/json");

      String payload = "{\"temperature\": " + String(temp, 1) +
                       ", \"humidity\": " + String(hum, 1) + "}";

      int httpResponseCode = http.POST(payload);

      if (httpResponseCode > 0) {
        Serial.print("✅ Data sent! Server response: ");
        Serial.println(http.getString());
      } else {
        Serial.print("❌ Error sending POST. Code: ");
        Serial.println(httpResponseCode);
      }
      http.end();
    } else {
      Serial.println("⚠️ Failed to read from DHT sensor!");
    }
  } else {
    Serial.println("⚠️ WiFi not connected!");
  }

  delay(10000); // send every 10s
}