/* Copyright 2015 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 <QList>
#include <QString>
#include <QDir>
#include <QAbstractListModel>
#include "minecraft/World.h"

#include "multimc_logic_export.h"

class QFileSystemWatcher;

class MULTIMC_LOGIC_EXPORT WorldList : public QAbstractListModel
{
	Q_OBJECT
public:
	enum Columns
	{
		NameColumn,
		LastPlayedColumn
	};

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

	WorldList(const QString &dir);

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

	virtual int rowCount(const QModelIndex &parent = QModelIndex()) const
	{
		return 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 worlds.size();
	};
	bool empty() const
	{
		return size() == 0;
	}
	World &operator[](size_t index)
	{
		return worlds[index];
	}

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

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

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

	/// get data for drag action
	virtual QMimeData *mimeData(const QModelIndexList &indexes) const;
	/// get the supported mime types
	virtual QStringList mimeTypes() const;

	void startWatching();
	void stopWatching();

	virtual bool isValid();

	QDir dir() const
	{
		return m_dir;
	}

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

private:
	void internalSort(QList<World> &what);
private slots:
	void directoryChanged(QString path);

signals:
	void changed();

protected:
	QFileSystemWatcher *m_watcher;
	bool is_watching;
	QDir m_dir;
	QList<World> worlds;
};