#include <WiFi.h>
#include <PubSubClient.h>
#include <LiquidCrystal_I2C.h>


#define PIRSENSOR_PIN 4 // PIR PIN
#define SERVO_PIN 2 // Servo motor pin
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows
//Servo servo;
// Servo motor
int check;

// MQTT Credentials
const char* ssid = "Wokwi-GUEST"; // Setting your AP SSID
const char* password = ""; // Setting your AP PSK
const char* mqttServer = "test.mosquitto.org";
// const char* mqttUserName = "bqzbdodo";
// const char* mqttPwd = "5oU2W_QN2WD8";
const char* clientID = "ujaisldaalkjlasdfgh;laslksdja1"; // Client ID username+0001
const char* topic = "Tempdata"; // Publish topic

// Parameters for using non-blocking delay
unsigned long previousMillis = 0;
const long interval = 1000;
String msgStr = "";      // MQTT message buffer
int value;

// Setting up WiFi and MQTT client
WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect(clientID)) {
      Serial.println("MQTT connected");
      client.subscribe("i2clcd");
      Serial.println("Topic Subscribed");
    }
    else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);  // wait 5sec and retry
    }
  }
}

// Subscribe callback
void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived in topic: ");
  Serial.println(topic);
  Serial.print("Message: ");
  String data = "";
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
    data += (char)payload[i];
  }
  Serial.println();
  Serial.print("Message size: ");
  Serial.println(length);
  Serial.println();
  Serial.println("-----------------------");
  Serial.println(data);

  if (String(topic) == "servo") {
    int degree = data.toInt(); // Convert the received data to an integer
    Serial.print("Moving servo to degree: ");
    Serial.println(degree);
    //servo.write(degree); // Move the servo to the specified degree
  }
  if (String(topic) == "i2clcd") {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print(data);

  }
}

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

  // Setup servo
  //servo.attach(SERVO_PIN);
  //servo.write(0);

  lcd.init(); // initialize the lcd
  lcd.backlight();
  // Setup WS2812 LED strip
  setup_wifi();
  client.setServer(mqttServer, 1883); // Setting MQTT server
  client.setCallback(callback); // Define function which will be called when a message is received.
}

void loop() {
  if (!client.connected()) { // If client is not connected
    reconnect(); // Try to reconnect
  }
  client.loop();
  unsigned long currentMillis = millis(); // Read current time
  if (currentMillis - previousMillis >= interval) { // If current time - last time > 5 sec
    previousMillis = currentMillis;
    // Read temperature and humiditY
    value = digitalRead(PIRSENSOR_PIN);
    String pirsens;
    if(value == HIGH)
    {
      Serial.println("MOTION DETECTED");
      pirsens = "MOTION DETECTED AT DOOR";
      client.publish("MOTION DETECTION", pirsens.c_str());
      delay(7000);
    }
    else
    {

    }
  }
}