// SPDX-License-Identifier: LGPL-2.1-or-later

/***************************************************************************
 *   Copyright (c) 2023 David Carter <dcarter@david.carter.ca>             *
 *                                                                         *
 *   This file is part of FreeCAD.                                         *
 *                                                                         *
 *   FreeCAD is free software: you can redistribute it and/or modify it    *
 *   under the terms of the GNU Lesser General Public License as           *
 *   published by the Free Software Foundation, either version 2.1 of the  *
 *   License, or (at your option) any later version.                       *
 *                                                                         *
 *   FreeCAD 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      *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with FreeCAD. If not, see                               *
 *   <https://www.gnu.org/licenses/>.                                      *
 *                                                                         *
 **************************************************************************/

#ifndef MATGUI_MATERIALTREEWIDGET_H
#define MATGUI_MATERIALTREEWIDGET_H

#include <memory>

#include <QCheckBox>
#include <QComboBox>
#include <QFontComboBox>
#include <QLineEdit>
#include <QPushButton>
#include <QRadioButton>
#include <QStandardItem>
#include <QStandardItemModel>
#include <QTreeView>

#include <FCGlobal.h>

#include <Base/Parameter.h>
#include <Gui/PrefWidgets.h>
#include <Gui/WidgetFactory.h>


#include <Mod/Material/App/MaterialFilter.h>
#include <Mod/Material/App/MaterialFilterPy.h>
#include <Mod/Material/App/MaterialManager.h>
#include <Mod/Material/App/Materials.h>

namespace MatGui
{
class WidgetFactoryInst;
class MaterialTreeWidgetPy;

/** The Material Tree widget class
 * This widget is intended for use wherever materials are used. It is a light weight
 * alternative to the full Materials editor.
 *
 * The widget itself is the combination of a number of smaller widgets. A simple text
 * field shows any currently selected material. An arrow will expand a tree to show
 * the widget library, allowing the user to select the material they require.
 *
 * When expanded, the user will be presented the option to launch the full material
 * editor. This will allow them to create/copy/modify as required.
 *
 * Additionally, they will be given the option to create a material card based on the
 * current settings.
 *
 * \author David Carter
 */
class MatGuiExport MaterialTreeWidget: public QWidget, public Base::BaseClass
{
    Q_OBJECT
    Q_PROPERTY(QSize treeSizeHint READ treeSizeHint WRITE
                   setTreeSizeHint)  // clazy:exclude=qproperty-without-notify

    TYPESYSTEM_HEADER_WITH_OVERRIDE();

public:
    explicit MaterialTreeWidget(const Materials::MaterialFilter& filter,
                                QWidget* parent = nullptr);
    explicit MaterialTreeWidget(
        const std::shared_ptr<std::list<std::shared_ptr<Materials::MaterialFilter>>>& filterList,
        QWidget* parent = nullptr);
    explicit MaterialTreeWidget(QWidget* parent = nullptr);
    ~MaterialTreeWidget() override;

    /** Set the material by specifying its UUID
     */
    void setMaterial(const QString& uuid);
    /** get the material UUID
     */
    QString getMaterialUUID() const;
    /** Set the material filter
     */
    void setFilter(const Materials::MaterialFilter& filter);
    void setFilter(
        const std::shared_ptr<std::list<std::shared_ptr<Materials::MaterialFilter>>>& filterList);
    void setActiveFilter(const QString& name);

    void setExpanded(bool open);
    bool getExpanded()
    {
        return m_expanded;
    }

    /* Indicates if we should show favourite materials
     */
    bool includeFavorites() const
    {
        return _filterOptions.includeFavorites();
    }
    void setIncludeFavorites(bool value)
    {
        _filterOptions.setIncludeFavorites(value);
    }

    /* Indicates if we should show recent materials
     */
    bool includeRecent() const
    {
        return _filterOptions.includeRecent();
    }
    void setIncludeRecent(bool value)
    {
        _filterOptions.setIncludeRecent(value);
    }

    /* Indicates if we should include empty folders
     */
    bool includeEmptyFolders() const
    {
        return _filterOptions.includeEmptyFolders();
    }
    void setIncludeEmptyFolders(bool value)
    {
        _filterOptions.setIncludeEmptyFolders(value);
    }

    /* Indicates if we should include empty libraries
     */
    bool includeEmptyLibraries() const
    {
        return _filterOptions.includeEmptyLibraries();
    }
    void setIncludeEmptyLibraries(bool value)
    {
        Base::Console().log("setIncludeEmptyLibraries(%s)\n", (value ? "true" : "false"));
        _filterOptions.setIncludeEmptyLibraries(value);
    }

    /* Indicates if we should include materials in the older format
     */
    bool includeLegacy() const
    {
        return _filterOptions.includeLegacy();
    }
    void setIncludeLegacy(bool legacy)
    {
        _filterOptions.setIncludeLegacy(legacy);
    }

    QSize sizeHint() const override;
    QSize treeSizeHint() const;
    void setTreeSizeHint(const QSize& hint);

Q_SIGNALS:
    /** Emits this signal when a material has been selected */
    void materialSelected(const std::shared_ptr<Materials::Material>& material);
    void onMaterial(const QString& uuid);
    void onExpanded(bool expanded);

private Q_SLOTS:
    void expandClicked(bool checked);
    void editorClicked(bool checked);
    void onSelectMaterial(const QItemSelection& selected, const QItemSelection& deselected);
    void onDoubleClick(const QModelIndex& index);
    void onFilter(const QString& text);

private:
    // UI minimum sizes
    static const int minimumWidth = 250;
    static const int minimumTreeWidth = 250;
    static const int minimumTreeHeight = 500;

    static const int defaultFavorites = 0;
    static const int defaultRecents = 5;

    void setup();

    QLineEdit* m_material;
    QPushButton* m_expand;
    QTreeView* m_materialTree;
    QPushButton* m_editor;
    QComboBox* m_filterCombo;
    bool m_expanded;
    QSize m_treeSizeHint;

    QString m_materialDisplay;
    QString m_uuid;

    std::list<QString> _favorites;
    std::list<QString> _recents;
    Materials::MaterialFilter _filter;
    Materials::MaterialFilterTreeWidgetOptions _filterOptions;
    std::shared_ptr<std::list<std::shared_ptr<Materials::MaterialFilter>>> _filterList;
    int _recentMax;
    MaterialTreeWidgetPy* pyTreeWidget {nullptr};

    // friends
    friend class Gui::WidgetFactoryInst;

protected:
    Materials::MaterialManager& getMaterialManager()
    {
        return Materials::MaterialManager::getManager();
    }

    void getFavorites();

    void getRecents();
    void saveRecents();
    void addRecent(const QString& uuid);
    bool isRecent(const QString& uuid) const;
    void saveWidgetSettings();
    void saveMaterialTreeChildren(const Base::Reference<ParameterGrp>& param,
                                  QTreeView* tree,
                                  QStandardItemModel* model,
                                  QStandardItem* item);
    void saveMaterialTree();

    /** Create the widgets UI objects
     */
    void createLayout();

    bool findInTree(const QStandardItem& node, QModelIndex* index, const QString& uuid);
    QModelIndex findInTree(const QString& uuid);
    void updateMaterial(const QString& uuid);
    void createMaterialTree();
    void fillMaterialTree();
    void updateMaterialTree();
    void addExpanded(QStandardItem* parent, QStandardItem* child);
    void addExpanded(QStandardItem* parent,
                     QStandardItem* child,
                     const Base::Reference<ParameterGrp>& param);
    void addExpanded(QStandardItemModel* model, QStandardItem* child);
    void addExpanded(QStandardItemModel* model,
                     QStandardItem* child,
                     const Base::Reference<ParameterGrp>& param);
    void addRecents(QStandardItem* parent);
    void addFavorites(QStandardItem* parent);
    void addMaterials(
        QStandardItem& parent,
        const std::shared_ptr<std::map<QString, std::shared_ptr<Materials::MaterialTreeNode>>>&
            modelTree,
        const QIcon& folderIcon,
        const QIcon& icon,
        const Base::Reference<ParameterGrp>& param);
    void setFilterVisible(bool open);
    void fillFilterCombo();
    bool hasMultipleFilters() const
    {
        return (_filterList && _filterList->size() > 1);
    }
};

/**
 * The PrefColorButton class.
 */
class MatGuiExport PrefMaterialTreeWidget: public MaterialTreeWidget, public Gui::PrefWidget
{
    Q_OBJECT

    Q_PROPERTY(QByteArray prefEntry READ entryName WRITE
                   setEntryName)  // clazy:exclude=qproperty-without-notify
    Q_PROPERTY(QByteArray prefPath READ paramGrpPath WRITE
                   setParamGrpPath)  // clazy:exclude=qproperty-without-notify

public:
    explicit PrefMaterialTreeWidget(QWidget* parent = nullptr);
    ~PrefMaterialTreeWidget() override;

protected:
    // restore from/save to parameters
    void restorePreferences() override;
    void savePreferences() override;
};

}  // namespace MatGui

#endif  // MATGUI_MATERIALTREEWIDGET_H