/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team
  Modifications Copyright (C) 2025 mikesolar

  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 "matrix.h"

#include <QMatrix4x4>
#include <QVector2D>

#include "widget/slider/floatslider.h"

namespace olive
{

const QString MatrixGenerator::kPositionInput = QStringLiteral("pos_in");
const QString MatrixGenerator::kRotationInput = QStringLiteral("rot_in");
const QString MatrixGenerator::kScaleInput = QStringLiteral("scale_in");
const QString MatrixGenerator::kUniformScaleInput =
	QStringLiteral("uniform_scale_in");
const QString MatrixGenerator::kAnchorInput = QStringLiteral("anchor_in");

#define super Node

MatrixGenerator::MatrixGenerator()
{
	AddInput(kPositionInput, NodeValue::kVec2, QVector2D(0.0, 0.0));

	AddInput(kRotationInput, NodeValue::kFloat, 0.0);

	AddInput(kScaleInput, NodeValue::kVec2, QVector2D(1.0f, 1.0f));
	SetInputProperty(kScaleInput, QStringLiteral("min"), QVector2D(0, 0));
	SetInputProperty(kScaleInput, QStringLiteral("view"),
					 FloatSlider::kPercentage);
	SetInputProperty(kScaleInput, QStringLiteral("disable1"), true);

	AddInput(kUniformScaleInput, NodeValue::kBoolean, true,
			 InputFlags(kInputFlagNotConnectable | kInputFlagNotKeyframable));

	AddInput(kAnchorInput, NodeValue::kVec2, QVector2D(0.0, 0.0));
}

QString MatrixGenerator::Name() const
{
	return tr("Orthographic Matrix");
}

QString MatrixGenerator::ShortName() const
{
	return tr("Ortho");
}

QString MatrixGenerator::id() const
{
	return QStringLiteral("org.olivevideoeditor.Olive.ortho");
}

QVector<Node::CategoryID> MatrixGenerator::Category() const
{
	return { kCategoryGenerator, kCategoryMath };
}

QString MatrixGenerator::Description() const
{
	return tr(
		"Generate an orthographic matrix using position, rotation, and scale.");
}

void MatrixGenerator::Retranslate()
{
	super::Retranslate();

	SetInputName(kPositionInput, tr("Position"));
	SetInputName(kRotationInput, tr("Rotation"));
	SetInputName(kScaleInput, tr("Scale"));
	SetInputName(kUniformScaleInput, tr("Uniform Scale"));
	SetInputName(kAnchorInput, tr("Anchor Point"));
}

void MatrixGenerator::Value(const NodeValueRow &value,
							const NodeGlobals &globals,
							NodeValueTable *table) const
{
	// Push matrix output
	QMatrix4x4 mat = GenerateMatrix(value, false, false, false, QMatrix4x4());
	table->Push(NodeValue::kMatrix, mat, this);
}

QMatrix4x4 MatrixGenerator::GenerateMatrix(const NodeValueRow &value,
										   bool ignore_anchor,
										   bool ignore_position,
										   bool ignore_scale,
										   const QMatrix4x4 &mat) const
{
	QVector2D anchor;
	QVector2D position;
	QVector2D scale;

	if (!ignore_anchor) {
		anchor = value[kAnchorInput].toVec2();
	}

	if (!ignore_scale) {
		scale = value[kScaleInput].toVec2();
	}

	if (!ignore_position) {
		position = value[kPositionInput].toVec2();
	}

	return GenerateMatrix(position, value[kRotationInput].toDouble(), scale,
						  value[kUniformScaleInput].toBool(), anchor, mat);
}

QMatrix4x4
MatrixGenerator::GenerateMatrix(const QVector2D &pos, const float &rot,
								const QVector2D &scale, bool uniform_scale,
								const QVector2D &anchor, QMatrix4x4 mat)
{
	// Position
	mat.translate(pos.x(), pos.y());

	// Rotation
	mat.rotate(rot, 0, 0, 1);

	// Scale (convert to a QVector3D so that the identity matrix is preserved if all values are 1.0f)
	QVector3D full_scale;
	if (uniform_scale) {
		full_scale = QVector3D(scale.x(), scale.x(), 1.0f);
	} else {
		full_scale = QVector3D(scale, 1.0f);
	}
	mat.scale(full_scale);

	// Anchor Point
	mat.translate(-anchor.x(), -anchor.y());

	return mat;
}

void MatrixGenerator::InputValueChangedEvent(const QString &input, int element)
{
	Q_UNUSED(element)

	if (input == kUniformScaleInput) {
		SetInputProperty(kScaleInput, QStringLiteral("disable1"),
						 GetStandardValue(kUniformScaleInput).toBool());
	}
}

}
