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

int pirPin = 14; // Sensor PIR terhubung ke pin 14
int pirState = LOW; // Inisialisasi status PIR sebagai LOW

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

String phoneNumber = "6289630873888"; //Nomor telepon WhatsApp
String apiKey = "8721437"; //API Key CallMeBot

// Fungsi untuk melakukan encoding URL
String urlEncode(String str) {
  String encodedString = "";
  for (unsigned int i = 0; i < str.length(); i++) {
    char c = str.charAt(i);
    if (c == ' ') {
      encodedString += '+';
    } else if (isalnum(c)) {
      encodedString += c;
    } else {
      encodedString += '%';
      encodedString += String(c >> 4, HEX);
      encodedString += String(c & 0x0F, HEX);
    }
  }
  return encodedString;
}

// Fungsi untuk mengirim pesan melalui CallMeBot API
void sendMessage(String message) {
  String encodedMessage = urlEncode(message);
  String url = "https://api.callmebot.com/whatsapp.php?phone=6289630873888&text=This+is+a+test&apikey=8721437" + phoneNumber + "&apikey=" + apiKey + "&text=" + encodedMessage;

  HTTPClient http;
  http.begin(url);
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");

  int httpResponseCode = http.POST("");

  if (httpResponseCode > 0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    String payload = http.getString();
    Serial.println("Response payload: ");
    Serial.println(payload);
    if (httpResponseCode == 200) {
      Serial.println("Message sent successfully");
    } else {
      Serial.println("Error sending the message");
    }
  } else {
    Serial.print("Error on sending POST: ");
    Serial.println(httpResponseCode);
  }

  http.end();
}

void setup() {
  Serial.begin(115200);
  pinMode(pirPin, INPUT); // Set PIR pin as input

  // Koneksi ke Wi-Fi
  WiFi.begin(ssid, password);
  Serial.println("Connecting to WiFi");

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

  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  // Print the API key to the Serial Monitor
  Serial.print("API Key: ");
  Serial.println(apiKey);

  // Kirim pesan awal jika ingin mengirim pesan ketika pertama kali terhubung
  sendMessage("Sensor Gerak Aktif! " + WiFi.localIP().toString());
}

void loop() {
  int motionDetected = digitalRead(pirPin);

  if (motionDetected == HIGH) {
    if (pirState == LOW) {
      // PIR state berubah menjadi HIGH, artinya gerakan terdeteksi
      Serial.println("Motion detected!");
      sendMessage("Gerak Terdeteksi!");

      pirState = HIGH;
    }
  } else {
    if (pirState == HIGH) {
      // PIR state berubah menjadi LOW, artinya gerakan berhenti
      Serial.println("Motion ended");
      pirState = LOW;
    }
  }

  delay(100); // Tambahkan delay kecil untuk mengurangi beban pemrosesan
}