#include <Arduino.h>  
#include <ArduinoJson.h>
#include <WiFi.h>
#include <ESP32Servo.h>
#include <PubSubClient.h>
#include <LiquidCrystal_I2C.h>

// Update these with values suitable for your network.

const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Config MQTT Server

const char* mqttServer = "mqtt-dashboard.com";
int port = 1883;
String stMac;
char mac[50];
char clientId[50];

const int ServoT = 18;
const int ServoB = 16;
const int LED_PIN = 23;


Servo servo1;
Servo servo2;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  pinMode(LED_PIN, OUTPUT);
  servo1.attach(ServoT);
  servo2.attach(ServoB);
  servo1.write(0);
  servo2.write(0);
  lcd.init(); // initialize the lcd
  lcd.backlight();
  Serial.begin(115200);
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  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());

  client.setServer(mqttServer, port);
  client.setCallback(callback);

}

void mqttReconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    long r = random(1000);
    sprintf(clientId, "clientId-%ld", r);
    if (client.connect(clientId)) {
      Serial.print(clientId);
      Serial.println(" connected");
      client.subscribe("toesp");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void loop() {
  delay(10);
  if (!client.connected()) {
    mqttReconnect();
  }
  client.loop();

}

void callback(char* topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.print(topic);
  Serial.print(". Message: ");
  String stMessage;
  
  for (int i = 0; i < length; i++) {
    Serial.print((char)message[i]);
    stMessage += (char)message[i];
  }
  Serial.println();

  if (String(topic) == "toesp") {
    Serial.print("Changing output to ");
    if(stMessage == "pass"){
      lcd.setCursor(5, 0);
      lcd.print("PASS");
      lcd.setCursor(2, 1);
      lcd.print("Please enjoy");
      digitalWrite(LED_PIN, HIGH);
      servo1.write(90);
      servo2.write(90);
      delay(3000);
      servo1.write(0);
      servo2.write(0);
      lcd.clear();   
      digitalWrite(LED_PIN, LOW);
      delay(1000);
    }
    else if(stMessage == "fail"){
      lcd.setCursor(5, 0);
      lcd.print("FAIL");
      lcd.setCursor(0, 1);
      lcd.print("Unable to enter");
      for(int i = 0; i < 3; i++) {
        digitalWrite(LED_PIN, HIGH);
        delay(1000);
        digitalWrite(LED_PIN, LOW);
        delay(1000);
      }
      lcd.clear(); 
    }
  }
}