/* 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 <QTest>
#include "TestUtil.h"

#include "GZip.h"
#include <random>

void fib(int& prev, int& cur)
{
	auto ret = prev + cur;
	prev = cur;
	cur = ret;
}

class GZipTest : public QObject
{
	Q_OBJECT
  private slots:

	void test_Through()
	{
		// test up to 10 MB
		static const int size = 10 * 1024 * 1024;
		QByteArray random;
		QByteArray compressed;
		QByteArray decompressed;
		std::default_random_engine eng((std::random_device())());
		std::uniform_int_distribution<unsigned short> idis(
			0, std::numeric_limits<uint8_t>::max());

		// initialize random buffer
		for (int i = 0; i < size; i++) {
			random.append((char)idis(eng));
		}

		// initialize fibonacci
		int prev = 1;
		int cur = 1;

		// test if fibonacci long random buffers pass through GZip
		do {
			QByteArray copy = random;
			copy.resize(cur);
			compressed.clear();
			decompressed.clear();
			QVERIFY(GZip::zip(copy, compressed));
			QVERIFY(GZip::unzip(compressed, decompressed));
			QCOMPARE(decompressed, copy);
			fib(prev, cur);
		} while (cur < size);
	}
};

QTEST_GUILESS_MAIN(GZipTest)

#include "GZip_test.moc"