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

// WiFi and MQTT credentials
const char *ssid = "Wokwi-GUEST";
const char *password = "";
const char *mqttBroker = "iot.egrotek.id";
const char *mqttPubTopic = "egrotek/pub/APPmI3YgR3vfymCfa04ET/DEV86DQZ8YycseogmJBI1";
const char *mqttSubTopic = "egrotek/sub/APPmI3YgR3vfymCfa04ET/DEV86DQZ8YycseogmJBI1";
const char *mqttID = "DEV86DQZ8YycseogmJBI1";
const char *mqttUser = "ph0CMhmhF1NsPjSDKN";
const char *mqttPass = "RZtPsrEIfXDCFTJRm3";
uint16_t mqttPort = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

// Push button pin
const int push_button = 15;

void setup() {
  Serial.begin(9600);

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

  // Set up MQTT
  client.setServer(mqttBroker, mqttPort);
  client.setCallback(callback);
  
  // Connect to MQTT broker
  reconnect();
  
  // Subscribe to MQTT topic
  client.subscribe(mqttSubTopic);

  pinMode(push_button, INPUT);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  // Read push button status
  int statusTombol = digitalRead(push_button);
  Serial.print("Status Tombol: ");
  Serial.println(statusTombol);

  // Publish push button status to MQTT
  String pesan = "{\"nilai\":\"" + String(statusTombol) + "\"}";
  client.publish(mqttPubTopic, pesan.c_str());

  delay(1000); // Delay between readings
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect(mqttID, mqttUser, mqttPass)) {
      Serial.println("connected");
      client.subscribe(mqttSubTopic);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

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