/* Copyright 2013-2019 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();

signals:
    void minecraftChanged();

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();
    void disableInteraction(bool disable);

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;
};