#define BLYNK_TEMPLATE_ID "TMPL4flJrop1W"
#define BLYNK_TEMPLATE_NAME "Alarm System"
#define BLYNK_AUTH_TOKEN "Enjfg3sNC_3EzPoiClbarfROVuDp-poK"

#include <WiFi.h>
#include <PubSubClient.h>
#include <BlynkSimpleEsp32.h>
#include <HTTPClient.h>
#include <UrlEncode.h>

const char *ssid = "Wokwi-GUEST"; // Change to your Wi-Fi network name
const char *password = "";         // Change to your Wi-Fi password
const char *auth = "9Ucm9712xaqwHEooSjZMD9W_niCQGi-d";

String stMac;
char mac[50];
char clientId[50];

WiFiClient espClient;
PubSubClient client(espClient);

const char *mqttServer = "mqtt.flespi.io";
const char *mqtt_user = "k15SZYBAzQFtsouVCFzwUmNSrOeGJu9Ul2A9R2zeG2xYhPHHi412gFLxhP3P70zi";
const char *mqtt_password = "";
int port = 1883;
const char *topicFromNodered = "Cadavos/Morales/Petalcorin/Pulvera/fromNodered";

const int PIRPin = 19; 
const int LED = 5;
const int buzzPin = 18;

bool alarmOn = false;
unsigned long lastNotificationTime = 0;

String phoneNumber = "+359893439660"; // Your phone number
String apiKey = "8817832";            // Your API key

void setup() {
    Serial.begin(115200);
    pinMode(PIRPin, INPUT);
    pinMode(LED, OUTPUT);
    pinMode(buzzPin, OUTPUT);
    setupWifi();
    setupBlynk();
}

void setupWifi() {
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("WiFi connected");
    Serial.print("IP address: ");
    Serial.println(WiFi.localIP());
}

void setupBlynk() {
    Blynk.begin(BLYNK_AUTH_TOKEN, ssid, password);
    while (Blynk.connect() == false) {}
    Serial.println("Blynk connected");
}

void loop() {
    Blynk.run();
    handleMotionDetection();
}

void handleMotionDetection() {
    bool motionDetected = digitalRead(PIRPin);
    if (motionDetected) {
        Serial.println("Motion detected!");
        digitalWrite(LED, HIGH);
        tone(buzzPin, 1000);
        delay(500);
        digitalWrite(LED, LOW);
        noTone(buzzPin);
        if (!alarmOn) {
            alarmOn = true;
            activateAlarm();
        }
    } else {
        if (alarmOn) {
            alarmOn = false;
        }
    }
}

void sendWhatsAppNotification() {
    unsigned long currentTime = millis();
    if (currentTime - lastNotificationTime >= 5000) { // Send notification every 5 seconds
        lastNotificationTime = currentTime;
        String message = "Alarm activated! Motion detected."; // Your message here
        // 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.println("Message sent successfully");
        } else {
            Serial.println("Error sending the message");
            Serial.print("HTTP response code: ");
            Serial.println(httpResponseCode);
        }

        // Free resources
        http.end();
    }
}

void activateAlarm() {
    tone(buzzPin, 1000);      // Activate the buzzer
    // Optionally, send a notification that the alarm has been manually activated
    sendWhatsAppNotification();
    // Set up a timer to trigger notifications every 5 seconds
    lastNotificationTime = millis(); // Reset timer
}

BLYNK_WRITE(V1) {
    int buttonState = param.asInt();
    if (buttonState == HIGH) {
        activateAlarm(); // Call a function to activate the alarm
        digitalWrite(LED, HIGH); // Turn on the LED lamp
    } else {
        digitalWrite(LED, LOW); // Turn off the LED lamp
        noTone(buzzPin); // Turn off the buzzer
    }
}