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

#define btnA 14         //pin del boton A
#define btnB 27         //pin del boton B
#define btnC 33         //pin del boton C

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
// Defining the WiFi channel speeds up the connection:
#define WIFI_CHANNEL 6

volatile bool btnA_pressed = false;
volatile bool btnB_pressed = false;
volatile bool btnC_pressed = false;

//interrupcion del boton A
void IRAM_ATTR interrupt_BA(){
    btnA_pressed = true;
}

//interrupcion del boton B
void IRAM_ATTR interrupt_BB(){
    btnB_pressed = true;
}

//interrupcion del boton C
void IRAM_ATTR interrupt_BC(){
    btnC_pressed = true;
}

// constantes del MQTT
// direccion broker, puerto, y nombre cliente
const char *MQTT_BROKER_ADRESS = "mqtt.eclipseprojects.io";
const uint16_t MQTT_PORT = 1883;
const char *MQTT_CLIENT_NAME = "PabloRomero_pub_test";

// instanciar objetos
WiFiClient espClient;
PubSubClient mqttClient(espClient);

String payload;
String content = "";

void ConnectWiFi()
{
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD, WIFI_CHANNEL);
  Serial.print("Connecting to WiFi ");
  Serial.print(WIFI_SSID);
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");

  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void InitMqtt()
{
  mqttClient.setServer(MQTT_BROKER_ADRESS, MQTT_PORT);
}

void ConnectMqtt()
{
  while (!mqttClient.connected())
  {
    Serial.print("Starting MQTT connection...");
    if (mqttClient.connect(MQTT_CLIENT_NAME))
    {
      Serial.print("Client connected");
    }
    else
    {
      Serial.print("Failed MQTT connection, rc=");
      Serial.print(mqttClient.state());
      Serial.println(" try again in 5 seconds");

      delay(5000);
    }
  }
}

void HandleMqtt()
{
  if (!mqttClient.connected())
  {
    ConnectMqtt();
  }
  mqttClient.loop();
}

void PublishMqtt_BA(bool data)
{
  payload = "";
  payload = String(data);
  mqttClient.publish("PabloRomero/Boton A", (char *)payload.c_str()); //PabloRomero/buttons es el topic
  btnA_pressed = false;
}

void PublishMqtt_BB(bool data)
{
  payload = "";
  payload = String(data);
  mqttClient.publish("PabloRomero/Boton B", (char *)payload.c_str()); //PabloRomero/buttons es el topic
  btnB_pressed = false;
}
void PublishMqtt_BC(bool data)
{
  payload = "";
  payload = String(data);
  mqttClient.publish("PabloRomero/Boton C", (char *)payload.c_str()); //PabloRomero/buttons es el topic
  btnC_pressed = false;
}

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

  pinMode(btnA, INPUT_PULLUP);
  pinMode(btnB, INPUT_PULLUP);
  pinMode(btnC, INPUT_PULLUP);

  ConnectWiFi();

  InitMqtt();

  //INTERRUPCIONES DE LOS BOTONES
  attachInterrupt(digitalPinToInterrupt(btnA),interrupt_BA, RISING);
  attachInterrupt(digitalPinToInterrupt(btnB),interrupt_BB, RISING);
  attachInterrupt(digitalPinToInterrupt(btnC),interrupt_BC, RISING);
}

void loop()
{
  HandleMqtt();

  PublishMqtt_BA(btnA_pressed);
  PublishMqtt_BB(btnB_pressed);
  PublishMqtt_BC(btnC_pressed);

  delay(1000);
}