//
// 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 "base/observer.h"
#include "media/media_clip_reader.h"
#include "ui/twidget.h"

class HistoryItem;

namespace Media {
namespace Clip {
class Playback;
} // namespace Clip

namespace Player {

class Float : public TWidget, private base::Subscriber {
public:
	Float(QWidget *parent, HistoryItem *item, Fn<void(bool visible)> toggleCallback,
	      Fn<void(bool closed)> draggedCallback);

	HistoryItem *item() const {
		return _item;
	}
	void setOpacity(double opacity) {
		if (_opacity != opacity) {
			_opacity = opacity;
			update();
		}
	}
	double countOpacityByParent() const {
		return outRatio();
	}
	bool isReady() const {
		return (getReader() != nullptr);
	}
	void detach();
	bool detached() const {
		return !_item;
	}
	bool dragged() const {
		return _drag;
	}
	void resetMouseState() {
		_down = false;
		if (_drag) {
			finishDrag(false);
		}
	}
	void ui_repaintHistoryItem(not_null<const HistoryItem *> item) {
		if (item == _item) {
			repaintItem();
		}
	}

protected:
	void paintEvent(QPaintEvent *e) override;
	void mouseMoveEvent(QMouseEvent *e) override;
	void mousePressEvent(QMouseEvent *e) override;
	void mouseReleaseEvent(QMouseEvent *e) override;
	void mouseDoubleClickEvent(QMouseEvent *e) override;

private:
	double outRatio() const;
	Clip::Reader *getReader() const;
	void repaintItem();
	void prepareShadow();
	bool hasFrame() const;
	bool fillFrame();
	QRect getInnerRect() const;
	void updatePlayback();
	void finishDrag(bool closed);

	HistoryItem *_item = nullptr;
	Fn<void(bool visible)> _toggleCallback;

	double _opacity = 1.;

	QPixmap _shadow;
	QImage _frame;
	bool _down = false;
	QPoint _downPoint;

	bool _drag = false;
	QPoint _dragLocalPoint;
	Fn<void(bool closed)> _draggedCallback;

	std::unique_ptr<Clip::Playback> _roundPlayback;
};

} // namespace Player
} // namespace Media