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

#include "MqttManager.h"
#include "Config.h"


WiFiClient wifiClient;

PubSubClient mqttClient(wifiClient);



void MqttManager::begin()
{
    mqttClient.setServer(
        Config::MQTT_HOST,
        Config::MQTT_PORT
    );

    mqttClient.setCallback(
        [this](char* topic, byte* payload, unsigned int length)
        {
            callback(topic, payload, length);
        }
    );

    reconnect();
}



void MqttManager::loop()
{
    if (!mqttClient.connected())
    {
        reconnect();
    }

    mqttClient.loop();
}



void MqttManager::reconnect()
{
    Serial.println("MQTT verbinden...");

    while (!mqttClient.connected())
    {
        if (mqttClient.connect(Config::MQTT_CLIENT))
        {
            Serial.println("MQTT verbunden");

            mqttClient.publish(
                Config::MQTT_STATUS_TOPIC,
                "online"
            );

            mqttClient.subscribe(
                Config::MQTT_COMMAND_TOPIC
            );

            _connected = true;
        }
        else
        {
            Serial.print(".");

            delay(3000);
        }
    }
}



void MqttManager::callback(
    char* topic,
    byte* payload,
    unsigned int length
)
{
    Serial.print("MQTT Nachricht: ");
    Serial.println(topic);

    Serial.print("Payload: ");

    for (unsigned int i = 0; i < length; i++)
    {
        Serial.print(
            (char)payload[i]
        );
    }

    Serial.println();
}



bool MqttManager::connected()
{
    return mqttClient.connected();
}