#include <WiFi.h>
#include "PubSubClient.h"
#include <WireGuard-ESP32.h>
#include <ESPping.h>

char private_key[] = "gCo1bc5uqrPKEeEpD2onVt4NTXQ5FCkNKqVuQnxEZH4=";
IPAddress local_ip(192, 168, 177, 2);
char public_key[] = "/hv+5FF+Cka4WQQjaEyT4EVDFBo2vXfXJPJg3PKy0Tg=";
char endpoint_address[] = "178.208.79.72"; // IP of Wireguard endpoint to connect to.
int endpoint_port = 13231;


static WireGuard wg;


const char* ssid = "Wokwi-GUEST";
const char* password = "";
//const char* mqttServer = "broker.emqx.io";
//const char* mqttServer = "test.mosquitto.org";
const char* mqttServer = "192.168.12.1"; 
//const char* mqttServer = "broker.mqttdashboard.com";

int port = 1883;
String stMac;
char mac[50];
char clientId[50];

WiFiClient espClient;
PubSubClient client(espClient);

const int ledPin = 2;

void setup() {
  Serial.begin(115200);
  randomSeed(analogRead(0));
  

  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  wifiConnect();

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  Serial.println(WiFi.macAddress());
  stMac = WiFi.macAddress();
  stMac.replace(":", "_");
  Serial.println(stMac);
  Serial.println("Adjusting system time...");
  configTime(9 * 60 * 60, 0, "216.239.35.8");
  
  
  client.setServer(mqttServer, port);
  client.setCallback(callback);
  pinMode(ledPin, OUTPUT);
  wg.begin(
    local_ip,           // IP address of the local interface
    private_key,        // Private key of the local interface
    endpoint_address,   // Address of the endpoint peer.
    public_key,         // Public key of the endpoint peer.
    endpoint_port);    
}

void wifiConnect() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password, 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
}

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("MiftahLed/1");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

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) == "lIVECODING/led") {
    Serial.print("Changing output to ");
    if(stMessage == "on"){
      Serial.println("on");
      digitalWrite(ledPin, HIGH);
    }
    else if(stMessage == "off"){
      Serial.println("off");
      digitalWrite(ledPin, LOW);
    }
  }
}

void loop() {
  delay(10);
  bool success = Ping.ping("192.168.12.1", 3);
 
if(!success){
    Serial.println("Ping failed");
    return;
}
 
Serial.println("Ping succesful.");
delay(100);
  if (!client.connected()) {
    mqttReconnect();
  }
  client.loop();
}