/* 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 <QTemporaryDir>
#include <QStandardPaths>
#include "TestUtil.h"

#include "FileSystem.h"

class FileSystemTest : public QObject
{
	Q_OBJECT

	const QString bothSlash = "/foo/";
	const QString trailingSlash = "foo/";
	const QString leadingSlash = "/foo";

  private slots:
	void test_pathCombine()
	{
		QCOMPARE(QString("/foo/foo"), FS::PathCombine(bothSlash, bothSlash));
		QCOMPARE(QString("foo/foo"),
				 FS::PathCombine(trailingSlash, trailingSlash));
		QCOMPARE(QString("/foo/foo"),
				 FS::PathCombine(leadingSlash, leadingSlash));

		QCOMPARE(QString("/foo/foo/foo"),
				 FS::PathCombine(bothSlash, bothSlash, bothSlash));
		QCOMPARE(QString("foo/foo/foo"),
				 FS::PathCombine(trailingSlash, trailingSlash, trailingSlash));
		QCOMPARE(QString("/foo/foo/foo"),
				 FS::PathCombine(leadingSlash, leadingSlash, leadingSlash));
	}

	void test_PathCombine1_data()
	{
		QTest::addColumn<QString>("result");
		QTest::addColumn<QString>("path1");
		QTest::addColumn<QString>("path2");

		QTest::newRow("qt 1") << "/abc/def/ghi/jkl" << "/abc/def" << "ghi/jkl";
		QTest::newRow("qt 2") << "/abc/def/ghi/jkl" << "/abc/def/" << "ghi/jkl";
#if defined(Q_OS_WIN)
		QTest::newRow("win native, from C:") << "C:/abc" << "C:" << "abc";
		QTest::newRow("win native 1")
			<< "C:/abc/def/ghi/jkl" << "C:\\abc\\def" << "ghi\\jkl";
		QTest::newRow("win native 2")
			<< "C:/abc/def/ghi/jkl" << "C:\\abc\\def\\" << "ghi\\jkl";
#endif
	}

	void test_PathCombine1()
	{
		QFETCH(QString, result);
		QFETCH(QString, path1);
		QFETCH(QString, path2);

		QCOMPARE(FS::PathCombine(path1, path2), result);
	}

	void test_PathCombine2_data()
	{
		QTest::addColumn<QString>("result");
		QTest::addColumn<QString>("path1");
		QTest::addColumn<QString>("path2");
		QTest::addColumn<QString>("path3");

		QTest::newRow("qt 1")
			<< "/abc/def/ghi/jkl" << "/abc" << "def" << "ghi/jkl";
		QTest::newRow("qt 2")
			<< "/abc/def/ghi/jkl" << "/abc/" << "def" << "ghi/jkl";
		QTest::newRow("qt 3")
			<< "/abc/def/ghi/jkl" << "/abc" << "def/" << "ghi/jkl";
		QTest::newRow("qt 4")
			<< "/abc/def/ghi/jkl" << "/abc/" << "def/" << "ghi/jkl";
#if defined(Q_OS_WIN)
		QTest::newRow("win 1")
			<< "C:/abc/def/ghi/jkl" << "C:\\abc" << "def" << "ghi\\jkl";
		QTest::newRow("win 2")
			<< "C:/abc/def/ghi/jkl" << "C:\\abc\\" << "def" << "ghi\\jkl";
		QTest::newRow("win 3")
			<< "C:/abc/def/ghi/jkl" << "C:\\abc" << "def\\" << "ghi\\jkl";
		QTest::newRow("win 4")
			<< "C:/abc/def/ghi/jkl" << "C:\\abc\\" << "def" << "ghi\\jkl";
#endif
	}

	void test_PathCombine2()
	{
		QFETCH(QString, result);
		QFETCH(QString, path1);
		QFETCH(QString, path2);
		QFETCH(QString, path3);

		QCOMPARE(FS::PathCombine(path1, path2, path3), result);
	}

	void test_copy()
	{
		QString folder = QFINDTESTDATA("data/test_folder");
		auto f = [&folder]() {
			QTemporaryDir tempDir;
			tempDir.setAutoRemove(true);
			qDebug() << "From:" << folder << "To:" << tempDir.path();

			QDir target_dir(FS::PathCombine(tempDir.path(), "test_folder"));
			qDebug() << tempDir.path();
			qDebug() << target_dir.path();
			FS::copy c(folder, target_dir.path());
			c();

			for (auto entry : target_dir.entryList()) {
				qDebug() << entry;
			}
			QVERIFY(target_dir.entryList().contains("pack.mcmeta"));
			QVERIFY(target_dir.entryList().contains("assets"));
		};

		// first try variant without trailing /
		QVERIFY(!folder.endsWith('/'));
		f();

		// then variant with trailing /
		folder.append('/');
		QVERIFY(folder.endsWith('/'));
		f();
	}

	void test_getDesktop()
	{
		QCOMPARE(FS::getDesktopDir(), QStandardPaths::writableLocation(
										  QStandardPaths::DesktopLocation));
	}

// this is only valid on linux
// FIXME: implement on windows, OSX, then test.
#if defined(Q_OS_LINUX)
	void test_createShortcut_data()
	{
		QTest::addColumn<QString>("location");
		QTest::addColumn<QString>("dest");
		QTest::addColumn<QStringList>("args");
		QTest::addColumn<QString>("name");
		QTest::addColumn<QString>("iconLocation");
		QTest::addColumn<QByteArray>("result");

		QTest::newRow("unix")
			<< QDir::currentPath() << "asdfDest"
			<< (QStringList() << "arg1" << "arg2") << "asdf" << QString()
#if defined(Q_OS_LINUX)
			<< GET_TEST_FILE("data/FileSystem-test_createShortcut-unix")
#elif defined(Q_OS_WIN)
			<< QByteArray()
#endif
			;
	}

	void test_createShortcut()
	{
		QFETCH(QString, location);
		QFETCH(QString, dest);
		QFETCH(QStringList, args);
		QFETCH(QString, name);
		QFETCH(QString, iconLocation);
		QFETCH(QByteArray, result);

		QVERIFY(FS::createShortCut(location, dest, args, name, iconLocation));
		QCOMPARE(QString::fromLocal8Bit(TestsInternal::readFile(
					 location + QDir::separator() + name + ".desktop")),
				 QString::fromLocal8Bit(result));

		// QDir().remove(location);
	}
#endif
};

QTEST_GUILESS_MAIN(FileSystemTest)

#include "FileSystem_test.moc"