/*******************************************************************************
 * retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidget.h                  *
 *                                                                             *
 * Copyright 2013 by Robert Fernie     <retroshare.project@gmail.com>          *
 *                                                                             *
 * This program is free software: you can redistribute it and/or modify        *
 * it under the terms of the GNU Affero General Public License as              *
 * published by the Free Software Foundation, either version 3 of the          *
 * License, or (at your option) any later version.                             *
 *                                                                             *
 * This program 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 Affero General Public License for more details.                         *
 *                                                                             *
 * You should have received a copy of the GNU Affero General Public License    *
 * along with this program. If not, see <https://www.gnu.org/licenses/>.       *
 *                                                                             *
 *******************************************************************************/

#ifndef _GXS_CHANNELPOSTSWIDGET_H
#define _GXS_CHANNELPOSTSWIDGET_H

#include <map>

#include <QStyledItemDelegate>

#include "gui/gxs/GxsMessageFramePostWidget.h"
#include "gui/feeds/FeedHolder.h"

#include "GxsChannelPostThumbnail.h"

namespace Ui {
class GxsChannelPostsWidgetWithModel;
}

class GxsChannelPostItem;
class QTreeWidgetItem;
class QSortFilterProxyModel;
class FeedItem;
class RsGxsChannelPostsModel;
class RsGxsChannelPostFilesModel;
class RsGxsChannelPostFilesProxyModel;

class ChannelPostFilesDelegate: public QStyledItemDelegate
{
	Q_OBJECT

	public:
		ChannelPostFilesDelegate(QObject *parent=0) : QStyledItemDelegate(parent){}
        virtual ~ChannelPostFilesDelegate(){}

		void paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const override;
        QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const override;

		void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &) const override;
    	QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
};

class ChannelPostDelegate: public QAbstractItemDelegate
{
	Q_OBJECT

	public:
        ChannelPostDelegate(QObject *parent=0) : QAbstractItemDelegate(parent), mZoom(1.2), mUseGrid(true){}
        virtual ~ChannelPostDelegate(){}

		void paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const override;
        QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const override;

        int cellSize(int col, const QFont& font, uint32_t parent_width) const;
        void zoom(bool zoom_or_unzoom) ;
        void setWidgetGrid(bool use_grid) ;
        void setAspectRatio(ChannelPostThumbnailView::AspectRatio r) ;

    private:
 		static constexpr float IMAGE_MARGIN_FACTOR = 1.0;
 		static constexpr float IMAGE_SIZE_FACTOR_W = 4.0 ;
 		static constexpr float IMAGE_SIZE_FACTOR_H = 6.0 ;
 		static constexpr float IMAGE_ZOOM_FACTOR   = 1.0;

        float mZoom;	// zoom factor for the whole thumbnail
        bool mUseGrid;  // wether we use the grid widget or the list widget
        ChannelPostThumbnailView::AspectRatio mAspectRatio;
};

class GxsChannelPostsWidgetWithModel: public GxsMessageFrameWidget
{
	Q_OBJECT

public:
	/* Filters */
	enum Filter {
		FILTER_TITLE =     1,
		FILTER_MSG =       2,
		FILTER_FILE_NAME = 3
	};

public:
	/** Default Constructor */
	GxsChannelPostsWidgetWithModel(const RsGxsGroupId &channelId, QWidget *parent = 0);
	/** Default Destructor */
	~GxsChannelPostsWidgetWithModel();

	/* GxsMessageFrameWidget */
	virtual QIcon groupIcon();
    virtual void groupIdChanged() { updateDisplay(true); }
    virtual QString groupName(bool) override;
    virtual bool navigate(const RsGxsMessageId&) override;

	void updateDisplay(bool complete);

#ifdef TODO
	/* FeedHolder */
	virtual QScrollArea *getScrollArea();
	virtual void deleteFeedItem(FeedItem *feedItem, uint32_t type);
	virtual void openChat(const RsPeerId& peerId);
#endif
	virtual void openComments(uint32_t type, const RsGxsGroupId &groupId, const QVector<RsGxsMessageId> &msg_versions, const RsGxsMessageId &msgId, const QString &title);

protected:
	/* GxsMessageFramePostWidget */
	virtual void groupNameChanged(const QString &name);

#ifdef TODO
	virtual bool insertGroupData(const RsGxsGenericGroupData *data) override;
#endif
	virtual bool useThread() { return mUseThread; }
    virtual void blank() ;

#ifdef TODO
	virtual bool getGroupData(RsGxsGenericGroupData *& data) override;
    virtual void getMsgData(const std::set<RsGxsMessageId>& msgIds,std::vector<RsGxsGenericMsgData*>& posts) override;
    virtual void getAllMsgData(std::vector<RsGxsGenericMsgData*>& posts) override;
	virtual void insertPosts(const std::vector<RsGxsGenericMsgData*>& posts) override;
	virtual void insertAllPosts(const std::vector<RsGxsGenericMsgData*>& posts, GxsMessageFramePostThread *thread) override;
#endif

	/* GxsMessageFrameWidget */
	virtual void setAllMessagesReadDo(bool read, uint32_t &token);

private slots:
	void showPostDetails();
	void updateGroupData();
    void download();
    void createMsg();
	void toggleAutoDownload();
	void subscribeGroup(bool subscribe);
	void filterChanged(QString);
	void settingsChanged();
    void handlePostsTreeSizeChange(QSize s, bool force=false);
	void postChannelPostLoad();
	void editPost();
	void postContextMenu(const QPoint&);
	void copyMessageLink();
	void updateZoomFactor(bool zoom_or_unzoom);
    void switchView();
    void switchOnlyUnread(bool b);
    void markMessageUnread();

public slots:
 	void sortColumnFiles(int col,Qt::SortOrder so);
 	void sortColumnPostFiles(int col,Qt::SortOrder so);
    void updateCommentsCount(int n);

private:
	void processSettings(bool load);
    RsGxsMessageId getCurrentItemId() const;
    void selectItem(const RsGxsMessageId& msg_id);

	void setAutoDownload(bool autoDl);
	static bool filterItem(FeedItem *feedItem, const QString &text, int filter);

	void insertChannelDetails(const RsGxsChannelGroup &group);
	void handleEvent_main_thread(std::shared_ptr<const RsEvent> event);

private:
	QAction *mAutoDownloadAction;

    RsGxsChannelGroup mGroup;
	bool mUseThread;
    RsEventsHandlerId_t mEventHandlerId ;

    RsGxsChannelPostsModel     *mChannelPostsModel;
    RsGxsChannelPostFilesModel *mChannelPostFilesModel;
    RsGxsChannelPostFilesModel *mChannelFilesModel;
    ChannelPostDelegate        *mChannelPostsDelegate;
    ChannelPostFilesDelegate   *mFilesDelegate;

    RsGxsMessageId mSelectedPost;

	/* UI - from Designer */
	Ui::GxsChannelPostsWidgetWithModel *ui;
};

#endif