/*
 * 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/>.
 */

#ifndef CORNERPINDISTORTNODE_H
#define CORNERPINDISTORTNODE_H

#include <QVector2D>

#include "node/gizmo/point.h"
#include "node/gizmo/polygon.h"
#include "node/inputdragger.h"
#include "node/node.h"

namespace olive
{
class CornerPinDistortNode : public Node {
	Q_OBJECT
public:
	CornerPinDistortNode();

	NODE_DEFAULT_FUNCTIONS(CornerPinDistortNode)

	virtual QString Name() const override
	{
		return tr("Corner Pin");
	}

	virtual QString id() const override
	{
		return QStringLiteral("org.olivevideoeditor.Olive.cornerpin");
	}

	virtual QVector<CategoryID> Category() const override
	{
		return { kCategoryDistort };
	}

	virtual QString Description() const override
	{
		return tr("Distort the image by dragging the corners.");
	}

	virtual void Retranslate() override;

	virtual void Value(const NodeValueRow &value, const NodeGlobals &globals,
					   NodeValueTable *table) const override;

	virtual ShaderCode
	GetShaderCode(const ShaderRequest &request) const override;

	virtual void UpdateGizmoPositions(const NodeValueRow &row,
									  const NodeGlobals &globals) override;

	/**
   * @brief Convenience function - converts the 2D slider values from being
   * an offset to the actual pixel value.
   */
	QPointF ValueToPixel(int value, const NodeValueRow &row,
						 const QVector2D &resolution) const;

	static const QString kTextureInput;
	static const QString kPerspectiveInput;
	static const QString kTopLeftInput;
	static const QString kTopRightInput;
	static const QString kBottomRightInput;
	static const QString kBottomLeftInput;

protected slots:
	virtual void GizmoDragMove(double x, double y,
							   const Qt::KeyboardModifiers &modifiers) override;

private:
	// Gizmo variables
	static const int kGizmoCornerCount = 4;
	PointGizmo *gizmo_resize_handle_[kGizmoCornerCount];
	PolygonGizmo *gizmo_whole_rect_;
};

}

#endif // CORNERPINDISTORTNODE_H
