//##########################################################################
//#                                                                        #
//#                              CLOUDCOMPARE                              #
//#                                                                        #
//#  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; version 2 or later of the License.      #
//#                                                                        #
//#  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.                          #
//#                                                                        #
//#          COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI)             #
//#                                                                        #
//##########################################################################

#include "matrixDisplayDlg.h"
#include "ui_matrixDisplayDlg.h"

#include "CCMath.h"

//local
#include "ccPersistentSettings.h"

//qCC_gl
#include <ccGuiParameters.h>

// qCC_db
#include "ccFileUtils.h"

//Qt
#include <QClipboard>
#include <QFileDialog>
#include <QSettings>

MatrixDisplayDlg::MatrixDisplayDlg(QWidget* parent/*=nullptr*/)
	: QWidget(parent)
	, m_ui( new Ui::MatrixDisplayDlg )
{
	m_ui->setupUi(this);

	connect(m_ui->exportToAsciiPushButton, &QAbstractButton::clicked, this, &MatrixDisplayDlg::exportToASCII);
	connect(m_ui->exportToClipboardPushButton, &QAbstractButton::clicked, this, &MatrixDisplayDlg::exportToClipboard);

	show();
}

MatrixDisplayDlg::~MatrixDisplayDlg()
{
	delete m_ui;
}

void MatrixDisplayDlg::fillDialogWith(const ccGLMatrix& mat)
{
	m_mat = ccGLMatrixd(mat.data());

	int precision = ccGui::Parameters().displayedNumPrecision;

	//display as 4x4 matrix
	m_ui->maxTextEdit->setText(mat.toString(precision));

	//display as rotation vector/angle
	{
		PointCoordinateType angle_rad;
		CCVector3 axis3D;
		CCVector3 t3D;
		mat.getParameters(angle_rad, axis3D, t3D);

		fillDialogWith(axis3D, angle_rad, t3D, precision);
	}
}

void MatrixDisplayDlg::fillDialogWith(const ccGLMatrixd& mat)
{
	m_mat = mat;

	int precision = ccGui::Parameters().displayedNumPrecision;

	//display as 4x4 matrix
	m_ui->maxTextEdit->setText(mat.toString(precision));

	//display as rotation vector/angle
	{
		double angle_rad;
		CCVector3d axis3D;
		CCVector3d t3D;
		mat.getParameters(angle_rad, axis3D, t3D);

		fillDialogWith(axis3D,angle_rad,t3D,precision);
	}
}

void MatrixDisplayDlg::fillDialogWith(const CCVector3d& axis, double angle_rad, const CCVector3d& T, int precision)
{
	//center position
	QString centerStr = QStringLiteral("%0 ; %1 ; %2").arg(T.x,0,'f',precision).arg(T.y,0,'f',precision).arg(T.z,0,'f',precision);
	//rotation axis
	QString axisStr = QStringLiteral("%0 ; %1 ; %2").arg(axis.x,0,'f',precision).arg(axis.y,0,'f',precision).arg(axis.z,0,'f',precision);
	//rotation angle
	QString angleStr = QStringLiteral("%1 deg.").arg( CCCoreLib::RadiansToDegrees( angle_rad ), 0, 'f', precision );

	m_ui->axisLabel->setText(axisStr);
	m_ui->angleLabel->setText(angleStr);
	m_ui->centerLabel->setText(centerStr);
}

void MatrixDisplayDlg::clear()
{
	m_ui->maxTextEdit->setText("Invalid transformation");
	m_ui->axisLabel->setText(QString());
	m_ui->angleLabel->setText(QString());
	m_ui->centerLabel->setText(QString());
	m_mat.toZero();
}

void MatrixDisplayDlg::exportToASCII()
{
	//persistent settings
	QSettings settings;
	settings.beginGroup(ccPS::LoadFile()); //use the same folder as the load one
	QString currentPath = settings.value(ccPS::CurrentPath(), ccFileUtils::defaultDocPath()).toString();

	QString outputFilename = QFileDialog::getSaveFileName(this, "Select output file", currentPath, "*.mat.txt");
	if (outputFilename.isEmpty())
		return;

	if (m_mat.toAsciiFile(outputFilename))
	{
		ccLog::Print(QString("[I/O] Matrix saved as '%1'").arg(outputFilename));
	}
	else
	{
		ccLog::Error(QString("Failed to save matrix as '%1'").arg(outputFilename));
	}

	//save last saving location
	settings.setValue(ccPS::CurrentPath(),QFileInfo(outputFilename).absolutePath());
	settings.endGroup();
}

void MatrixDisplayDlg::exportToClipboard()
{
	QClipboard* clipboard = QApplication::clipboard();
	if (clipboard)
	{
		clipboard->setText(m_mat.toString());
		ccLog::Print("Matrix saved to clipboard!");
	}
}