#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Wi-Fi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Blynk authentication token
char auth[] = "ekdMe5rZOOP_JzO1j_wJc6ljVcqZ65E2";

// Pin for the button
const int buttonPin = 2;
// Pin for the buzzer
const int buzzerPin = 5;
// Pin for the LED
const int ledPin = 13;

// Blynk virtual pin for the alarm status
#define VIRTUAL_ALARM V0

// Variable to store the previous state of the button
int previousState = HIGH;

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

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

  // Initialize Blynk
  Blynk.begin(auth, ssid, pass);

  // Set the button pin as input with internal pull-up resistor
  pinMode(buttonPin, INPUT_PULLUP);
  // Set the buzzer pin as output
  pinMode(buzzerPin, OUTPUT);
  // Set the LED pin as output
  pinMode(ledPin, OUTPUT);

  // Initially turn off the buzzer and LED
  digitalWrite(buzzerPin, LOW);
  digitalWrite(ledPin, LOW);
}

void loop() {
  Blynk.run();

  // Read the current state of the button
  int currentState = digitalRead(buttonPin);

  // Check if the button state has changed
  if (currentState != previousState) {
    if (currentState == HIGH) {
      // Button was clicked
      if (digitalRead(buzzerPin) == LOW) {
        Serial.println("Perimeter breach detected!");
        Blynk.virtualWrite(VIRTUAL_ALARM, HIGH); // Turn on the virtual alarm
        digitalWrite(buzzerPin, HIGH); // Turn on the buzzer
        digitalWrite(ledPin, HIGH); // Turn on the LED
      } else {
        Serial.println("Perimeter breach resolved.");
        Blynk.virtualWrite(VIRTUAL_ALARM, LOW); // Turn off the virtual alarm
        digitalWrite(buzzerPin, LOW); // Turn off the buzzer
        digitalWrite(ledPin, LOW); // Turn off the LED
      }
    }
    previousState = currentState;
  }

  delay(100); // Delay for stability
}