/* 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/>.
 *
 *  This file incorporates work covered by the following copyright and
 *  permission notice:
 *
 * Copyright 2013-2021 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "BaseInstance.h"
#include "launch/LaunchTask.h"

class ModFolderModel;
class LegacyModList;
class WorldList;
class Task;
/*
 * WHY: Legacy instances - from MultiMC 3 and 4 - are here only to provide a way
 * to upgrade them to the current format.
 */
class LegacyInstance : public BaseInstance
{
	Q_OBJECT
  public:
	explicit LegacyInstance(SettingsObjectPtr globalSettings,
							SettingsObjectPtr settings, const QString& rootDir);

	virtual void saveNow() override {}

	/// Path to the instance's minecraft.jar
	QString runnableJar() const;

	//! Path to the instance's modlist file.
	QString modListFile() const;

	////// Directories //////
	QString libDir() const;
	QString savesDir() const;
	QString texturePacksDir() const;
	QString jarModsDir() const;
	QString coreModsDir() const;
	QString resourceDir() const;

	QString instanceConfigFolder() const override;

	QString
	gameRoot() const override; // Path to the instance's minecraft directory.
	QString
	modsRoot() const override; // Path to the instance's minecraft directory.
	QString binRoot() const; // Path to the instance's minecraft bin directory.

	/// Get the curent base jar of this instance. By default, it's the
	/// versions/$version/$version.jar
	QString baseJar() const;

	/// the default base jar of this instance
	QString defaultBaseJar() const;
	/// the default custom base jar of this instance
	QString defaultCustomBaseJar() const;

	// the main jar that we actually want to keep when migrating the instance
	QString mainJarToPreserve() const;

	/*!
	 * Whether or not custom base jar is used
	 */
	bool shouldUseCustomBaseJar() const;

	/*!
	 * The value of the custom base jar
	 */
	QString customBaseJar() const;

	std::shared_ptr<LegacyModList> jarModList() const;
	std::shared_ptr<WorldList> worldList() const;

	/*!
	 * Whether or not the instance's minecraft.jar needs to be rebuilt.
	 * If this is true, when the instance launches, its jar mods will be
	 * re-added to a fresh minecraft.jar file.
	 */
	bool shouldRebuild() const;

	QString currentVersionId() const;
	QString intendedVersionId() const;

	QSet<QString> traits() const override
	{
		return {"legacy-instance", "texturepacks"};
	};

	virtual bool shouldUpdate() const;
	virtual Task::Ptr createUpdateTask(Net::Mode mode) override;

	virtual QString typeName() const override;

	bool canLaunch() const override
	{
		return false;
	}
	bool canEdit() const override
	{
		return true;
	}
	bool canExport() const override
	{
		return false;
	}
	shared_qobject_ptr<LaunchTask>
	createLaunchTask(AuthSessionPtr account,
					 MinecraftServerTargetPtr serverToJoin) override
	{
		return nullptr;
	}
	IPathMatcher::Ptr getLogFileMatcher() override
	{
		return nullptr;
	}
	QString getLogFileRoot() override
	{
		return gameRoot();
	}

	QString getStatusbarDescription() override;
	QStringList
	verboseDescription(AuthSessionPtr session,
					   MinecraftServerTargetPtr serverToJoin) override;

	QProcessEnvironment createEnvironment() override
	{
		return QProcessEnvironment();
	}
	QMap<QString, QString> getVariables() const override
	{
		return {};
	}

  protected:
	mutable std::shared_ptr<LegacyModList> jar_mod_list;
	mutable std::shared_ptr<WorldList> m_world_list;
};