// SPDX-License-Identifier: GPL-3.0-only AND Apache-2.0
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
 *  ProjT Launcher - Minecraft Launcher
 *  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, version 3.
 *
 *  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, write to the Free Software Foundation,
 *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * === Upstream License Block (Do Not Modify) ==============================
 *
 * Copyright 2015-2021 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 <QAbstractListModel>
#include <QDir>
#include <QList>
#include <QMimeData>
#include <QString>
#include "BaseInstance.h"
#include "minecraft/World.h"

class QFileSystemWatcher;

class WorldList : public QAbstractListModel
{
	Q_OBJECT
  public:
	enum Columns
	{
		NameColumn,
		GameModeColumn,
		LastPlayedColumn,
		SizeColumn,
		InfoColumn
	};

	enum Roles
	{
		ObjectRole = Qt::UserRole + 1,
		FolderRole,
		SeedRole,
		NameRole,
		GameModeRole,
		LastPlayedRole,
		SizeRole,
		IconFileRole
	};

	WorldList(const QString& dir, BaseInstance* instance);

	virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;

	virtual int rowCount(const QModelIndex& parent = QModelIndex()) const
	{
		return parent.isValid() ? 0 : static_cast<int>(size());
	};
	virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
	virtual int columnCount(const QModelIndex& parent) const;

	size_t size() const
	{
		return m_worlds.size();
	};
	bool empty() const
	{
		return size() == 0;
	}
	World& operator[](size_t index)
	{
		return m_worlds[index];
	}

	/// Reloads the mod list and returns true if the list changed.
	virtual bool update();

	/// Install a world from location
	void installWorld(QFileInfo filename);

	/// Deletes the mod at the given index.
	virtual bool deleteWorld(int index);

	/// Removes the world icon, if any
	virtual bool resetIcon(int index);

	/// Deletes all the selected mods
	virtual bool deleteWorlds(int first, int last);

	/// flags, mostly to support drag&drop
	virtual Qt::ItemFlags flags(const QModelIndex& index) const;
	/// get data for drag action
	virtual QMimeData* mimeData(const QModelIndexList& indexes) const;
	/// get the supported mime types
	virtual QStringList mimeTypes() const;
	/// process data from drop action
	virtual bool dropMimeData(const QMimeData* data,
							  Qt::DropAction action,
							  int row,
							  int column,
							  const QModelIndex& parent);
	/// what drag actions do we support?
	virtual Qt::DropActions supportedDragActions() const;

	/// what drop actions do we support?
	virtual Qt::DropActions supportedDropActions() const;

	void startWatching();
	void stopWatching();

	virtual bool isValid();

	QDir dir() const
	{
		return m_dir;
	}

	QString instDirPath() const;

	const QList<World>& allWorlds() const
	{
		return m_worlds;
	}

  private slots:
	void directoryChanged(QString path);
	void loadWorldsAsync();

  signals:
	void changed();

  protected:
	BaseInstance* m_instance;
	QFileSystemWatcher* m_watcher;
	bool m_isWatching;
	QDir m_dir;
	QList<World> m_worlds;
};