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

const char *ssid = "";        // Your WiFi SSID
const char *password = ""; // Your WiFi password
const char *apiKey = "YOUR_THINGSPEAK_API_KEY"; // Thingspeak API Key
const char *server = "api.thingspeak.com";
const int pirPin = 14; // GPIO 14 (D14) for PIR sensor on ESP32

bool alertEnabled = true; // Default alert status

void setup() {
  pinMode(pirPin, INPUT);
  Serial.begin(115200);

  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Set up Thingspeak
  // Note: The Thingspeak library is not needed for the ESP32
  // You can use HTTPClient to send data directly

  // Connect to Thingspeak TalkBack
  talkbackSetup();
}

void loop() {
  if (digitalRead(pirPin) == HIGH && alertEnabled) {
    Serial.println("Intrusion detected!");
    sendDataToThingspeak();
  }
  delay(5000); // Wait for 5 seconds before checking again
  checkTalkBackCommand(); // Check for commands from Thingspeak TalkBack
}

void sendDataToThingspeak() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    String data = apiKey;
    data += "&field1=" + String(1); // Send value 1 to indicate intrusion

    http.begin("http://" + String(server) + "/update");
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    int httpResponseCode = http.POST(data);

    if (httpResponseCode == 200) {
      Serial.println("Data sent to Thingspeak.");
    } else {
      Serial.println("Error sending data.");
    }

    http.end();
  }
}

void talkbackSetup() {
  // Register the device with Thingspeak TalkBack
  HTTPClient http;
  http.begin("http://" + String(server) + "/talkbacks/YOUR_TALKBACK_ID.json");
  int httpResponseCode = http.GET();
  if (httpResponseCode == 200) {
    String response = http.getString();
    Serial.println(response);
  }
  http.end();
}

void checkTalkBackCommand() {
  // Check for commands from Thingspeak TalkBack
  HTTPClient http;
  http.begin("http://" + String(server) + "/talkbacks/YOUR_TALKBACK_ID/commands/last.json");
  int httpResponseCode = http.GET();
  if (httpResponseCode == 200) {
    String response = http.getString();
    Serial.println(response);
    if (response.indexOf("alert_on") != -1) {
      alertEnabled = true;
      Serial.println("Alert enabled.");
    } else if (response.indexOf("alert_off") != -1) {
      alertEnabled = false;
      Serial.println("Alert disabled.");
    }
  }
  http.end();
}