/*
 * Cantata
 *
 * Copyright (c) 2011-2022 Craig Drummond <craig.p.drummond@gmail.com>
 *
 * ----
 *
 * This program 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 2 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef GROUPEDVIEW_H
#define GROUPEDVIEW_H

#include "actionitemdelegate.h"
#include "treeview.h"
#include <QSet>

struct Song;
class RatingPainter;
class GroupedView;

class GroupedViewDelegate : public ActionItemDelegate {
	Q_OBJECT
public:
	GroupedViewDelegate(GroupedView* p);
	~GroupedViewDelegate() override;

	QSize sizeHint(int type, bool isCollection) const;
	QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const override;
	void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const override;
	int drawRatings(QPainter* painter, const Song& song, const QRect& r, const QFontMetrics& fm, const QColor& col) const;

private:
	GroupedView* view;
	mutable RatingPainter* ratingPainter;
};

class GroupedView : public TreeView {
	Q_OBJECT

public:
	enum Status {
		State_Default,
		State_Playing,
		State_StopAfter,
		State_StopAfterTrack,
		State_Paused,
		State_Stopped
	};

	static void setup();
	static int coverSize();
	static int borderSize();
	static int iconSize();
	static void drawPlayState(QPainter* painter, const QStyleOptionViewItem& option, const QRect& r, int state);

	GroupedView(QWidget* parent = nullptr, bool isPlayQueue = false);
	~GroupedView() override;

	void setModel(QAbstractItemModel* model) override;
	void setFilterActive(bool f);
	bool isFilterActive() const { return filterActive; }
	void setAutoExpand(bool ae) { autoExpand = ae; }
	bool isAutoExpand() const { return autoExpand; }
	void setStartClosed(bool sc);
	bool isStartClosed() const { return startClosed; }
	void setMultiLevel(bool ml) { isMultiLevel = ml; }
	void updateRows(qint32 row, quint16 curAlbum, bool scroll, const QModelIndex& parent = QModelIndex(), bool forceScroll = false);
	void updateCollectionRows();
	bool isCurrentAlbum(quint16 key) const { return key == currentAlbum; }
	bool isExpanded(quint16 key, quint32 collection) const { return filterActive || (autoExpand && currentAlbum == key) || (startClosed && controlledAlbums[collection].contains(key)) || (!startClosed && !controlledAlbums[collection].contains(key)); }
	void toggle(const QModelIndex& idx);
	QModelIndexList selectedIndexes() const override { return selectedIndexes(true); }
	QModelIndexList selectedIndexes(bool sorted) const;
	void dropEvent(QDropEvent* event) override;
	void collectionRemoved(quint32 key);
	void expand(const QModelIndex& idx, bool singleOnly = false) override;
	void collapse(const QModelIndex& idx, bool singleOnly = false) override;

private:
	void drawBranches(QPainter* painter, const QRect&, const QModelIndex&) const override;

public Q_SLOTS:
	void updateRows(const QModelIndex& parent);
	void coverLoaded(const Song& song, int size);

private Q_SLOTS:
	void itemClicked(const QModelIndex& index);

private:
	bool allowClose;
	bool startClosed;
	bool autoExpand;
	bool filterActive;
	bool isMultiLevel;
	quint16 currentAlbum;
	QMap<quint32, QSet<quint16>> controlledAlbums;
};

#endif
