// ============ Include Library ===================
#include <WiFi.h>
#include <PubSubClient.h>
#include <Arduino_JSON.h>
// ============ End Include Library ===================
// ============ Define Pin ===================
#define LED 13
#define ADC 34
// ============ End Define Pin ==============
// ============ Variabel ===================
const char* ssid = "Wokwi-GUEST";
const char* password = "";
// ============ MQTT ===============
const char* mqtt_server ="broker.mqtt-dashboard.com";
const char* topic_led = "led_topic_caio_joao_f2_Q8";
const char* topic_adc = "adc_topic_caio_joao_f2_Q9";
int port = 1883;
// ============ End MQTT ===============
unsigned long lastTime = 0;
unsigned long intervalTime = 1000;
uint32_t adc_value = 0;
char cstr[16];


// ============ End Variabel ===================
// ============ Class ===================
WiFiClient Client;
PubSubClient client(Client);
// ============ End Class ===================
// ============ Function ===================
void wifi_init();
void mqtt_init();
void led_init();
void analog_init();
void led_action(boolean action);
void process_data();
// ============ End Function ===================
void setup() {
  Serial.begin(115200);
  wifi_init();
  mqtt_init();
  led_init();
  analog_init();
}

void loop() {
  client.loop();
  if (!client.connected()) {
    mqtt_init();
  }
  if (millis() - lastTime > 500)
  {
    lastTime = millis();
    adc_value = analogRead(ADC);
    Serial.print("ADC Value: ");
    Serial.println(adc_value);
    itoa(adc_value, cstr, 10);
    client.publish(topic_adc, cstr);
  }
}

void wifi_init() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" Connected!");
}
void mqtt_init() {
  client.setServer(mqtt_server, port);
  client.setCallback(callback);
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "AulaIoT-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if(client.connect(clientId.c_str())) {
      Serial.println("connected to the Broker");
      client.subscribe("led_topic_caio_joao_f2_Q8"); //Tópico que o ESP subscreve. 
    } 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) {
  String sMsg;
  Serial.print("Message arrived in topic: ");
  Serial.println(topic);
  Serial.print("Message:");
  for (int i = 0; i < length; i++) {
    Serial.print((char) payload[i]);
    sMsg += (char) payload[i];
  }
  JSONVar objMsg = JSON.parse(sMsg);
  process_data(objMsg);
  Serial.println();
  Serial.println("-----------------------");

  if(sMsg == "1" || sMsg == "true" )
  {
    led_action(true);
  }
  else
  {
    led_action(false);
  }
}
void led_init() {
  pinMode(LED, OUTPUT);
}
void led_action(boolean action) {
  if(action)
  {
    digitalWrite(LED, LOW);
  }
  else
  {
    digitalWrite(LED, HIGH);
  }
}
void process_data(JSONVar jsonObject){
  if (JSON.typeof(jsonObject) == "undefine") {
    Serial.println("Gagal mendapatkan data karena type undefine");
    return;
  }
  Serial.println("jsonObject :");
  Serial.println(jsonObject);
  Serial.println("");
}
void analog_init() {
  pinMode(ADC, INPUT);
  adc_value = analogRead(ADC);
}