/***********************************************************************************

    Copyright (C) 2007-2026 Ahmet Öztürk (aoz_2@yahoo.com)

    This file is part of Lifeograph.

    Lifeograph 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, either version 3 of the License, or
    (at your option) any later version.

    Lifeograph 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 Lifeograph.  If not, see <http://www.gnu.org/licenses/>.

***********************************************************************************/


#ifndef LIFEOGRAPH_WIDGET_ENTRYLIST_HEADER
#define LIFEOGRAPH_WIDGET_ENTRYLIST_HEADER


#include <gtkmm.h>

#include "../diaryelements/diarydata.hpp"
#include "../diaryelements/entry.hpp"
#include "gtkmm/label.h"
#include "gtkmm/listview.h"
#include "gtkmm/treeexpander.h"


namespace LoG
{

class GObjectEntry : public Glib::Object
{
    public:
        static Glib::RefPtr< GObjectEntry > create( Entry* p2entry )
        { return Glib::make_refptr_for_instance< GObjectEntry >( new GObjectEntry( p2entry ) ); }

        Entry * const         m_p2entry;
        Gtk::Box*             m_Bx          { nullptr };
        Gtk::Image*           m_I           { nullptr };
        Gtk::Label*           m_L           { nullptr };
        Gtk::Image*           m_I_lock      { nullptr };
        Gtk::Image*           m_I_fav       { nullptr };
        sigc::connection      m_connection_expand;  // why do we have to do this manually? :(
        // Glib::RefPtr< Gio::ListStore< GObjectEntry > >
        //                       children      { Gio::ListStore< GObjectEntry >::create() };

    private:
        GObjectEntry( Entry* p2entry )
        : m_p2entry ( p2entry )
        {}
};

class WidgetEntryList : public Gtk::ListView
{
    public:
        WidgetEntryList( BaseObjectType*, const Glib::RefPtr< Gtk::Builder >& );

        void                        set_editable();

        void                        clear_and_disable();
        void                        populate();

        int                         get_entry_order( const Entry* p2entry ) const
        {
            auto kv_row = m_map_rows.find( p2entry->get_id() );
            return( kv_row != m_map_rows.end() ? kv_row->second->get_position() : -1 );
        }
        Glib::RefPtr< Gtk::TreeListRow >
        get_entry_row( const Entry* p2entry ) const
        {
            auto kv_row = m_map_rows.find( p2entry->get_id() );
            return( kv_row != m_map_rows.end() ? kv_row->second : nullptr );
        }

        void                        select( Entry*, const Entry* = nullptr );
        int                         get_selected_count() const
        { return m_selection_model->get_selection()->get_size(); }
        void                        scroll_to_entry( const Entry* );
        void                        present_entry_hard( const Entry* );
        void                        present_entry( const Entry* );
        void                        refresh_row( const Entry* );
        void                        refresh_row_label( const Entry* );

        // Gdk::Rectangle              get_item_rect( const Entry* ) const;

        void                        toggle_selected_collapsed();

        // bool                        add_entry( Entry* );
        void                        remove_entry( Entry* );

        void                        do_for_each_selected_entry(
                                            const std::function< void( Entry* ) >& );

    protected:
        // void                        on_button_press_event( int, double, double );
        void                        handle_menu_click( int, double, double,
                                                       const Glib::RefPtr< Gtk::ListItem >& );
        void                        handle_double_click( int, double, double,
                                                         const Glib::RefPtr< Gtk::ListItem >& );
        bool                        handle_key_press( guint, guint, Gdk::ModifierType );

        void                        mark_selected_entries_cut();
        void                        clear_cut_entries( bool );

        // void                        handle_drag_begin( const Glib::RefPtr< Gdk::Drag >&,
        //                                                const Glib::RefPtr< Gtk::DragSource >&,
        //                                                const Glib::RefPtr< GObjectEntry >& );
        Glib::RefPtr< Gdk::ContentProvider >
                                    handle_drag_prepare( double, double,
                                                         const Glib::RefPtr< Gtk::DragSource >&,
                                                         const Glib::RefPtr< Gtk::ListItem >& );
        // void                        handle_drag_end( const Glib::RefPtr< Gdk::Drag >&, bool );
        Gdk::DragAction             handle_drop_motion( double, double,
                                                        Glib::RefPtr< Gtk::DropTarget >&,
                                                        Gtk::TreeExpander*,
                                                        const Glib::RefPtr< Gtk::ListItem >& );
        bool                        handle_drop( const Glib::ValueBase&, double, double,
                                                 const Glib::RefPtr< Gtk::ListItem >& );

        void                        handle_selection_changed( guint, guint );

        void                        handle_expand_changed( const Glib::RefPtr< Gtk::TreeListRow >& );
// tried to use it for filtering by tagged but did not work well:
        void                        handle_row_activated( guint );

        void                        snapshot_vfunc( const Glib::RefPtr< Gtk::Snapshot >& ) override;

        using MapRowEntries = std::unordered_map< D::DEID, Glib::RefPtr< Gtk::TreeListRow >,
                                                  LoGIDHasher >;

        MapRowEntries               m_map_rows;
        EntrySelection              m_selected_entries; // multiple entry selection
        LoGID                       m_id_dragged_entry { DEID::UNSET }; // single entry case
        EntrySelection              m_cut_entries;

        void                        handle_setup_row( const Glib::RefPtr< Gtk::ListItem >& );
        void                        handle_bind_row( const Glib::RefPtr< Gtk::ListItem >& );
        void                        handle_unbind_row( const Glib::RefPtr< Gtk::ListItem >& );

        Glib::RefPtr< Gio::ListStore< GObjectEntry > >
                                    create_model( const Glib::RefPtr< Glib::ObjectBase >& = {} );

        Glib::RefPtr< Gio::ListStore< GObjectEntry > >
                                    m_store_root;
        Glib::RefPtr< Gtk::TreeListModel >
                                    m_TLM;
        Glib::RefPtr< Gtk::SelectionModel >
                                    m_selection_model;

        // last collapsed parent expander of the selected item (for coloring without selecting)
        Gtk::TreeExpander*          m_p2expander_last { nullptr };

        Glib::RefPtr< Gtk::EventControllerKey >
                                    m_controller_key;

        DropPosition                m_drop_position           { DropPosition::NONE };
        double                      m_drop_coord_x            { -1.0 };
        double                      m_drop_coord_y            { 0.0 };
        int                         m_drop_rect_h             { 0 };
        int                         m_line_height             { -1 };

        bool                        m_F_editable              { false };
        bool                        m_F_inhibit_show_entry    { false };

        static constexpr double     OFFSET_DROP_INTO          { 120.0 };

    friend class UIDiary;
};


} // end of namespace LoG

#endif
