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

const char* ssid = "Wokwi-GUEST";
const char* password = "";

String token = "Bearer EAAKdAeQoIPwBO1UqRW8Bpt1thcyvyist1H3QaYO6gZCHx04HYctW8jjV7ZCOQthiI8YIWUDwBhOz6ty4P5VZCsLFLOvQgJYZAZBFggX9d4mPmnmLTOjV4g8ZBgDkAgwn8KOgDM6jOi0KsVYn7yTO1n69bKgXX59qu7ccTRNAwdiFvL8B2vZBjkMDZB6iJ24fCv1sFJAy1AYI4SYvpFVvqrIzb8N6bHcZD";
String servidor = "https://graph.facebook.com/v18.0/236814969524617/messages";
String payload = "{ \"messaging_product\": \"whatsapp\", \"to\": \"51966380038\", \"type\": \"template\", \"template\": { \"name\": \"hello_world\", \"language\": { \"code\": \"en_US\" } } }";

const int trigPin = 12;
const int echoPin = 13;
const int buzzerPin = 2;
const int ledPin = 16;

void setup() {
  Serial.begin(9600);

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);

  WiFi.begin(ssid, password);
  Serial.println("Conectando al WiFi...");

  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("Se ha conectado al WiFi con la IP: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long duration = pulseIn(echoPin, HIGH);
  int distance = duration * 0.034 / 2;

  if (distance < 100) { 
    Serial.println("Hay Movimiento");
    tone(buzzerPin,1000);
    digitalWrite(ledPin, HIGH);

    if(WiFi.status() == WL_CONNECTED){
      HTTPClient http;
      http.begin(servidor.c_str());
      http.addHeader("Content-Type", "application/json");
      http.addHeader("Authorization", token);
      int httpPostCode = http.POST(payload);

      if (httpPostCode > 0) {
        String response = http.getString();
        Serial.println("HTTP Response:");
        Serial.println(response);
      }
      else {
        Serial.print("Error code: ");
        Serial.println(httpPostCode);
      }

      http.end();
    }
    else {
      Serial.println("WiFi Desconectado");
    }

  } else {
    noTone(buzzerPin);
    digitalWrite(ledPin, LOW);
    Serial.println("No hay Movimiento");
  }

  delay(1000);
}