/* SPDX-FileCopyrightText: 2026 Project Tick
 * SPDX-FileContributor: Project Tick
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 *   MeshMC - A Custom Launcher for Minecraft
 *   Copyright (C) 2026 Project Tick
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "ganalytics.h"
#include "ganalytics_worker.h"
#include "sys.h"

#include <QDataStream>
#include <QDebug>
#include <QLocale>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QQueue>
#include <QSettings>
#include <QTimer>
#include <QUrlQuery>
#include <QUuid>

GAnalytics::GAnalytics(const QString& trackingID, const QString& clientID,
					   const int version, QObject* parent)
	: QObject(parent)
{
	d = new GAnalyticsWorker(this);
	d->m_trackingID = trackingID;
	d->m_clientID = clientID;
	d->m_version = version;
}

/**
 * Destructor of class GAnalytics.
 */
GAnalytics::~GAnalytics()
{
	delete d;
}

void GAnalytics::setLogLevel(GAnalytics::LogLevel logLevel)
{
	d->m_logLevel = logLevel;
}

GAnalytics::LogLevel GAnalytics::logLevel() const
{
	return d->m_logLevel;
}

// SETTER and GETTER
void GAnalytics::setViewportSize(const QString& viewportSize)
{
	d->m_viewportSize = viewportSize;
}

QString GAnalytics::viewportSize() const
{
	return d->m_viewportSize;
}

void GAnalytics::setLanguage(const QString& language)
{
	d->m_language = language;
}

QString GAnalytics::language() const
{
	return d->m_language;
}

void GAnalytics::setAnonymizeIPs(bool anonymize)
{
	d->m_anonymizeIPs = anonymize;
}

bool GAnalytics::anonymizeIPs()
{
	return d->m_anonymizeIPs;
}

void GAnalytics::setSendInterval(int milliseconds)
{
	d->m_timer.setInterval(milliseconds);
}

int GAnalytics::sendInterval() const
{
	return (d->m_timer.interval());
}

bool GAnalytics::isEnabled()
{
	return d->m_isEnabled;
}

void GAnalytics::enable(bool state)
{
	d->enable(state);
}

int GAnalytics::version()
{
	return d->m_version;
}

void GAnalytics::setNetworkAccessManager(
	QNetworkAccessManager* networkAccessManager)
{
	if (d->networkManager != networkAccessManager) {
		// Delete the old network manager if it was our child
		if (d->networkManager && d->networkManager->parent() == this) {
			d->networkManager->deleteLater();
		}

		d->networkManager = networkAccessManager;
	}
}

QNetworkAccessManager* GAnalytics::networkAccessManager() const
{
	return d->networkManager;
}

static void appendCustomValues(QUrlQuery& query,
							   const QVariantMap& customValues)
{
	for (QVariantMap::const_iterator iter = customValues.begin();
		 iter != customValues.end(); ++iter) {
		query.addQueryItem(iter.key(), iter.value().toString());
	}
}

/**
 * Sent screen view is called when the user changed the applications view.
 * These action of the user should be noticed and reported. Therefore
 * a QUrlQuery is build in this method. It holts all the parameter for
 * a http POST. The UrlQuery will be stored in a message Queue.
 */
void GAnalytics::sendScreenView(const QString& screenName,
								const QVariantMap& customValues)
{
	d->logMessage(Info, QString("ScreenView: %1").arg(screenName));

	QUrlQuery query = d->buildStandardPostQuery("screenview");
	query.addQueryItem("cd", screenName);
	query.addQueryItem("an", d->m_appName);
	query.addQueryItem("av", d->m_appVersion);
	appendCustomValues(query, customValues);

	d->enqueQueryWithCurrentTime(query);
}

/**
 * This method is called whenever a button was pressed in the application.
 * A query for a POST message will be created to report this event. The
 * created query will be stored in a message queue.
 */
void GAnalytics::sendEvent(const QString& category, const QString& action,
						   const QString& label, const QVariant& value,
						   const QVariantMap& customValues)
{
	QUrlQuery query = d->buildStandardPostQuery("event");
	query.addQueryItem("an", d->m_appName);
	query.addQueryItem("av", d->m_appVersion);
	query.addQueryItem("ec", category);
	query.addQueryItem("ea", action);
	if (!label.isEmpty())
		query.addQueryItem("el", label);
	if (value.isValid())
		query.addQueryItem("ev", value.toString());

	appendCustomValues(query, customValues);

	d->enqueQueryWithCurrentTime(query);
}

/**
 * Method is called after an exception was raised. It builds a
 * query for a POST message. These query will be stored in a
 * message queue.
 */
void GAnalytics::sendException(const QString& exceptionDescription,
							   bool exceptionFatal,
							   const QVariantMap& customValues)
{
	QUrlQuery query = d->buildStandardPostQuery("exception");
	query.addQueryItem("an", d->m_appName);
	query.addQueryItem("av", d->m_appVersion);

	query.addQueryItem("exd", exceptionDescription);

	if (exceptionFatal) {
		query.addQueryItem("exf", "1");
	} else {
		query.addQueryItem("exf", "0");
	}
	appendCustomValues(query, customValues);

	d->enqueQueryWithCurrentTime(query);
}

/**
 * Session starts. This event will be sent by a POST message.
 * Query is setup in this method and stored in the message
 * queue.
 */
void GAnalytics::startSession()
{
	QVariantMap customValues;
	customValues.insert("sc", "start");
	sendEvent("Session", "Start", QString(), QVariant(), customValues);
}

/**
 * Session ends. This event will be sent by a POST message.
 * Query is setup in this method and stored in the message
 * queue.
 */
void GAnalytics::endSession()
{
	QVariantMap customValues;
	customValues.insert("sc", "end");
	sendEvent("Session", "End", QString(), QVariant(), customValues);
}

/**
 * Qut stream to persist class GAnalytics.
 */
QDataStream& operator<<(QDataStream& outStream, const GAnalytics& analytics)
{
	outStream << analytics.d->persistMessageQueue();

	return outStream;
}

/**
 * In stream to read GAnalytics from file.
 */
QDataStream& operator>>(QDataStream& inStream, GAnalytics& analytics)
{
	QList<QString> dataList;
	inStream >> dataList;
	analytics.d->readMessagesFromFile(dataList);

	return inStream;
}