#include <WiFi.h>
#include <HTTPClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// 1. FILL IN YOUR NETWORK DETAILS
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// 2. FILL IN YOUR LAPTOP'S IP ADDRESS (e.g., http://192.168.1.15:5000/temp)
const char* serverUrl = "https://twenty-nights-roll.loca.lt/temp";

// Hardware Pins
const int SENSOR_PIN = 4; // DS18B20 Data pin
const int FAN_PIN = 5;    // Pin connected to the NPN transistor

OneWire oneWire(SENSOR_PIN);
DallasTemperature sensors(&oneWire);

void setup() {
  Serial.begin(115200);
  pinMode(FAN_PIN, OUTPUT);
  
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi Connected!");
  
  sensors.begin();
}

void loop() {
  sensors.requestTemperatures();
  float tempC = sensors.getTempCByIndex(0);

  if (tempC != DEVICE_DISCONNECTED_C) {
   if (WiFi.status() == WL_CONNECTED) {
      HTTPClient http;
      
      // Keep it as http (no 's')
      http.begin(serverUrl); 
      
      // These headers trick ngrok into thinking we are a normal browser
      http.addHeader("Content-Type", "text/plain");
      http.addHeader("User-Agent", "Mozilla/5.0"); 
      http.addHeader("ngrok-skip-browser-warning", "true"); 

      String payload = "TEMP:" + String(tempC);
      int httpResponseCode = http.POST(payload);

      Serial.print("HTTP Code: ");
      Serial.println(httpResponseCode); 

      if (httpResponseCode > 0) {
        String response = http.getString();
        Serial.println("Server Response: " + response);
        
        // Simple check for the command
        if (response.indexOf("FAN:ON") != -1) {
          digitalWrite(FAN_PIN, HIGH);
        } else {
          digitalWrite(FAN_PIN, LOW);
        }
      } else {
        Serial.println("Error: " + String(httpResponseCode));
      }
      http.end();
    }
   }
  
  delay(3000); // Wait 3 seconds before next reading
}