// 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(const QHostAddress& host, const quint16 port,
			     QObject* parent) : QMQTT::Client(host, port, parent)
{
	connect(this, SIGNAL(connected(void)), this, SLOT(onConnected(void)));
	connect(this, SIGNAL(subscribed(const QString&)), this, SLOT(onSubscribed(const QString&)));
	connect(this, SIGNAL(received(const QMQTT::Message&)), this, SLOT(onReceived(const QMQTT::Message&)));
	connect(this, SIGNAL(published(const QMQTT::Message&, quint16)), this, SLOT(onPublished(const QMQTT::Message&, quint16)));
	connect(this, SIGNAL(error(const QMQTT::ClientError)), this, SLOT(onError(const QMQTT::ClientError)));

	/*
	 * 2 more signals:
	 * void unsubscribed(const QString& topic);
	 * void disconnected(void);
	 * void pingresp();
	 */
}

MQTTClient::~MQTTClient() {
}

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

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

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

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();

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

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

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

			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 << " topic: " << message.topic() << "payload" << QString::fromUtf8(message.payload());
}

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

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);
}

void MQTTClient::allHeatersOn(bool on) {
	Settings *s = Settings::getInstance();

	QString payload = on ? QString("1") : QString("0");

	for (int i = 0; i < s->nbZones(); i++) {
		const struct Room *r = &(s->m_rooms.at(i));
		for (int j = 0; j < r->heaters.count(); j++) {
			const struct Heater *h = &(r->heaters.at(j));

			/* TODO: check if connected */
			publish_msg(h->ctrl_topic, payload);
		}
	}
}

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