#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <HTTPClient.h>

#define PIR_SENSOR_PIN 25 
#define SERVO_PIN 14 

bool motionDetected = false;
bool doorIsLocked = true;  

Servo doorLockServo;

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* webhookURL = "https://webhookwizard.com/api/webhook/in?key=sk_4738b49d-a08e-433e-bb52-c5673372dd60";

void setup() {
  Serial.begin(115200);
  Serial.println("Starting ESP32...");

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

  pinMode(PIR_SENSOR_PIN, INPUT); 

  doorLockServo.attach(SERVO_PIN);
  doorLockServo.write(0);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Smart Door Lock");
}

void loop() {
  motionDetected = digitalRead(PIR_SENSOR_PIN);
  if (motionDetected) {
    if(doorIsLocked){
      unlockDoor();
    } else {
      lockDoor();
    }  
    sendWebhook();
  }
  delay(200);
}

void unlockDoor() {
  doorIsLocked = false;
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Motion Detected");
  lcd.setCursor(0, 1);
  lcd.print("Door Unlocked");
  doorLockServo.write(90);

  delay(5000);             
  doorIsLocked = true;
  lockDoor();
}

void lockDoor() {
  doorLockServo.write(0);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Door Locked");
}

void sendWebhook() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(webhookURL);
    http.addHeader("Content-Type", "application/json");
    
    String payload = "{\"motionDetected\": " + String(motionDetected) + ", \"doorIsLocked\": " + String(doorIsLocked) + "}";
    int httpResponseCode = http.POST(payload);

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println("Webhook Response: " + response);
    } else {
      Serial.println("Error sending webhook: " + String(httpResponseCode));
    }

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