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/* Copyright 2013-2018 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 <QString>
#include <QList>
#include <memory>

#include "Library.h"
#include "LaunchProfile.h"
#include "Component.h"
#include "ProfileUtils.h"
#include "BaseVersion.h"
#include "MojangDownloadInfo.h"
#include "multimc_logic_export.h"
#include "net/Mode.h"

class MinecraftInstance;
struct ComponentListData;
class ComponentUpdateTask;

class MULTIMC_LOGIC_EXPORT ComponentList : public QAbstractListModel
{
	Q_OBJECT
	friend ComponentUpdateTask;
public:
	enum Columns
	{
		NameColumn = 0,
		VersionColumn,
		NUM_COLUMNS
	};

	explicit ComponentList(MinecraftInstance * instance);
	virtual ~ComponentList();

	virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
	virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
	virtual QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
	virtual int rowCount(const QModelIndex &parent = QModelIndex()) const override;
	virtual int columnCount(const QModelIndex &parent) const override;
	virtual Qt::ItemFlags flags(const QModelIndex &index) const override;

	/// call this to explicitly mark the component list as loaded - this is used to build a new component list from scratch.
	void buildingFromScratch();

	/// install more jar mods
	void installJarMods(QStringList selectedFiles);

	/// install a jar/zip as a replacement for the main jar
	void installCustomJar(QString selectedFile);

	enum MoveDirection { MoveUp, MoveDown };
	/// move component file # up or down the list
	void move(const int index, const MoveDirection direction);

	/// remove component file # - including files/records
	bool remove(const int index);

	/// remove component file by id - including files/records
	bool remove(const QString id);

	bool customize(int index);

	bool revertToBase(int index);

	/// reload the list, reload all components, resolve dependencies
	void reload(Net::Mode netmode);

	// reload all components, resolve dependencies
	void resolve(Net::Mode netmode);

	/// get current running task...
	shared_qobject_ptr<Task> getCurrentTask();

	std::shared_ptr<LaunchProfile> getProfile() const;

	// NOTE: used ONLY by MinecraftInstance to provide legacy version mappings from instance config
	void setOldConfigVersion(const QString &uid, const QString &version);

	QString getComponentVersion(const QString &uid) const;

	bool setComponentVersion(const QString &uid, const QString &version, bool important = false);

	bool installEmpty(const QString &uid, const QString &name);

	QString patchFilePathForUid(const QString &uid) const;

	/// if there is a save scheduled, do it now.
	void saveNow();

public:
	/// get the profile component by id
	Component * getComponent(const QString &id);

	/// get the profile component by index
	Component * getComponent(int index);

private:
	void scheduleSave();
	bool saveIsScheduled() const;

	/// apply the component patches. Catches all the errors and returns true/false for success/failure
	void invalidateLaunchProfile();

	/// Add the component to the internal list of patches
	void appendComponent(ComponentPtr component);
	/// insert component so that its index is ideally the specified one (returns real index)
	void insertComponent(size_t index, ComponentPtr component);

	QString componentsFilePath() const;
	QString patchesPattern() const;

private slots:
	void save_internal();
	void updateSucceeded();
	void updateFailed(const QString & error);
	void componentDataChanged();

private:
	bool load();
	bool installJarMods_internal(QStringList filepaths);
    bool installCustomJar_internal(QString filepath);
	bool removeComponent_internal(ComponentPtr patch);

	bool migratePreComponentConfig();

private: /* data */

	std::unique_ptr<ComponentListData> d;
};