//
// This file is part of Kepka,
// an unofficial desktop version of Telegram messaging app,
// see https://github.com/procxx/kepka
//
// Kepka 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.
//
// It 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.
//
// In addition, as a special exception, the copyright holders give permission
// to link the code of portions of this program with the OpenSSL library.
//
// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
//
#pragma once

#include "history/history_item.h"
#include "ui/twidget.h"
namespace Ui {
class ScrollArea;
class Shadow;
} // namespace Ui

namespace Media {
namespace Player {

class CoverWidget;
class ListWidget;

class Panel : public TWidget {
	Q_OBJECT

public:
	enum class Layout {
		Full,
		OnlyPlaylist,
	};
	Panel(QWidget *parent, Layout layout);

	bool overlaps(const QRect &globalRect);

	void hideIgnoringEnterEvents();

	void showFromOther();
	void hideFromOther();

	using ButtonCallback = Fn<void()>;
	void setPinCallback(ButtonCallback &&callback);
	void setCloseCallback(ButtonCallback &&callback);

	void ui_repaintHistoryItem(not_null<const HistoryItem *> item);

	int bestPositionFor(int left) const;

protected:
	void resizeEvent(QResizeEvent *e) override;
	void paintEvent(QPaintEvent *e) override;
	void enterEventHook(QEvent *e) override;
	void leaveEventHook(QEvent *e) override;

private slots:
	void onShowStart();
	void onHideStart();

	void onScroll();
	void onListHeightUpdated();
	void onWindowActiveChanged();

private:
	void ensureCreated();
	void performDestroy();

	void updateControlsGeometry();

	void updateSize();
	void appearanceCallback();
	void hideFinished();
	int contentLeft() const;
	int contentTop() const;
	int contentRight() const;
	int contentBottom() const;
	int scrollMarginBottom() const;
	int contentWidth() const {
		return width() - contentLeft() - contentRight();
	}
	int contentHeight() const {
		return height() - contentTop() - contentBottom();
		;
	}

	void startAnimation();
	void scrollPlaylistToCurrentTrack();

	Layout _layout;
	bool _hiding = false;

	QPixmap _cache;
	Animation _a_appearance;

	bool _ignoringEnterEvents = false;

	QTimer _hideTimer, _showTimer;

	ButtonCallback _pinCallback, _closeCallback;
	object_ptr<CoverWidget> _cover = {nullptr};
	object_ptr<Ui::ScrollArea> _scroll;
	object_ptr<Ui::Shadow> _scrollShadow = {nullptr};
};

} // namespace Player
} // namespace Media