#include <WiFi.h>
#include <HTTPClient.h>
#include <UrlEncode.h>
#include "DHTesp.h"

const int DHT_PIN = 15;
const char* ssid = "Wokwi-GUEST";
const char* password = "";

DHTesp dhtSensor;

//international country code + phone number

String phoneNumber = "+919920016230";
String apiKey = "9726995";

void sendMessage(String message) {

  // Data to send with HTTP POST
  String url = "https://api.callmebot.com/whatsapp.php?phone=" + phoneNumber + "&apikey=" + apiKey + "&text=" + urlEncode(message);
  HTTPClient http;
  http.begin(url);

  // Specify content-type header
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  // Send HTTP POST request
  int httpResponseCode = http.POST(url);
  if (httpResponseCode == 200) {
    Serial.print("Message sent successfully");
  }
  else {
    Serial.println("Error sending the message");
    Serial.print("HTTP response code: ");
    Serial.println(httpResponseCode);
  }

  // Free resources
  http.end();
}

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

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  // Send Message to WhatsAPP "Add your name + NV number + Class"
  // Example: "Hello From Ebrahim - NV21058 - 12.CCP !"
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");
  if (data.temperature > 40) {
    sendMessage("Hello from Anas Khalid Hamdan - NV21061 - 12.CCP WARNING! Temperature is too high! Temperature: " + String(data.temperature, 2) + "°C");
  }
  delay(3600000); // Wait for a new reading from the sensor (DHT22 has ~0.5Hz sample rate)
}