// SPDX-License-Identifier: GPL-3.0-or-later
/*
 * Qt mutizone MQTT thermostat
 *
 * Copyright (C) 2019 Richard Genoud
 *
 */

#include <QLoggingCategory>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonValue>


#include "mqttclient.h"
#include "settings.h"
#include "qmqtt.h"

MQTTClient *MQTTClient::_singleton = NULL;

MQTTClient *MQTTClient::getInstance(void)
{
	if (!_singleton) {
		Settings *s = Settings::getInstance();

		_singleton =  new MQTTClient(QHostAddress(s->m_broker.address), s->m_broker.port);
	}

	return _singleton;
}

MQTTClient::MQTTClient(const QHostAddress& host, const quint16 port,
			     QObject* parent) : QMQTT::Client(host, port, parent)
{
	connect(this, &MQTTClient::connected, this, &MQTTClient::onConnected);
	connect(this, &MQTTClient::subscribed, this, &MQTTClient::onSubscribed);
	connect(this, &MQTTClient::received, this, &MQTTClient::onReceived);
	connect(this, &MQTTClient::published, this, &MQTTClient::onPublished);
	connect(this, &MQTTClient::error, this, &MQTTClient::onError);

	connectToHost();
}

MQTTClient::~MQTTClient() {
}

void MQTTClient::onError(const QMQTT::ClientError error)
{
	qDebug() << "error" << error << endl;
}

void MQTTClient::onConnected()
{
	qDebug() << "connected" << endl;
	this->subscribe("sensors/#", 1);
}

void MQTTClient::onSubscribed(const QString& topic)
{
	qDebug() << "subscribed " << topic << endl;
}

void MQTTClient::onReceived(const QMQTT::Message& message)
{
	Settings *s = Settings::getInstance();
	QJsonDocument sensorData;
	QJsonValue val;

	qDebug() << "publish received: \"" << QString::fromUtf8(message.payload())
		<< "\"" << " from: " << message.topic() << endl;

	for (int i = 0; i < s->nbZones(); ++i) {
		if (s->m_rooms.at(i).sensor_topic == message.topic()) {
			qDebug() << "this is for us !" << endl;
			sensorData = QJsonDocument::fromJson(message.payload());
			if (!sensorData.isObject()) {
				qWarning() << "malformed JSON data" << endl;
				goto out;
			}
			QJsonObject obj(sensorData.object());
			val = obj["temperature"];
			if (val.isDouble()) {
				emit new_temperature(i, val.toDouble());
				qDebug() << val.toDouble() << endl;
			}

			val = obj["humidity"];
			if (val.isDouble()) {
				emit new_hygro(i, val.toDouble());
				qDebug() << val.toDouble() << endl;
			}

			val = obj["battery"];
			if (val.isDouble()) {
				emit new_battery(i, val.toDouble());
				qDebug() << val.toDouble() << endl;
			}

			break;
		}

		if (s->m_rooms.at(i).availability_topic == message.topic()) {

			emit new_availability(i, message.payload() == QString("online").toUtf8());
		}
	}
out:
	return;
}

void MQTTClient::onPublished(const QMQTT::Message& message, quint16 msgid)
{
	qDebug() << "published" << msgid << " payload: " << message.topic() << endl;
}

void MQTTClient::onDisconnected(void)
{
	qDebug() << "disconnected" << endl;
}

void MQTTClient::publish_msg(const QString& topic, const QString& payload)
{
	// id is automatically incremented if ==0 and QoS>0
	// DUP: if a message is resent, it should have the DUP flag
	QMQTT::Message message(0, topic, payload.toUtf8(), 1, true, false);
	publish(message);
}

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