/*
 * Oak Video Editor - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE Team
 *
 * 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "point.h"

#include <QApplication>

namespace olive
{

PointGizmo::PointGizmo(const Shape &shape, bool smaller, QObject *parent)
	: DraggableGizmo{ parent }
	, shape_(shape)
	, smaller_(smaller)
{
}

PointGizmo::PointGizmo(const Shape &shape, QObject *parent)
	: PointGizmo(shape, false, parent)
{
}

PointGizmo::PointGizmo(QObject *parent)
	: PointGizmo(kSquare, parent)
{
}

void PointGizmo::Draw(QPainter *p) const
{
	QRectF rect = GetDrawingRect(p->transform(), GetStandardRadius());

	if (shape_ != kAnchorPoint) {
		p->setPen(QPen(Qt::black, 0));
		p->setBrush(Qt::white);
	}

	switch (shape_) {
	case kSquare:
		p->drawRect(rect);
		break;
	case kCircle:
		p->drawEllipse(rect);
		break;
	case kAnchorPoint:
		p->setPen(QPen(Qt::white, 0));
		p->setBrush(Qt::NoBrush);

		p->drawEllipse(rect);
		p->drawLines({ QPointF(rect.left(), rect.center().y()),
					   QPointF(rect.right(), rect.center().y()),
					   QPointF(rect.center().x(), rect.top()),
					   QPointF(rect.center().x(), rect.bottom()) });
		break;
	}
}

QRectF PointGizmo::GetClickingRect(const QTransform &t) const
{
	return GetDrawingRect(t, GetStandardRadius());
}

double PointGizmo::GetStandardRadius()
{
	return QFontMetrics(qApp->font()).height() * 0.25;
}

QRectF PointGizmo::GetDrawingRect(const QTransform &transform,
								  double radius) const
{
	QRectF r(0, 0, radius, radius);

	r = transform.inverted().mapRect(r);

	double width = r.width();
	double height = r.height();

	if (shape_ == kAnchorPoint) {
		width *= 2;
		height *= 2;
	}

	if (smaller_) {
		width *= 0.5;
		height *= 0.5;
	}

	return QRectF(point_.x() - width, point_.y() - height, 2 * width,
				  2 * height);
}

}
