/*
	(c) Copyright  2012 - 2020 Anton Sviridenko
	https://picapica.im

	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 3.

	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 <https://www.gnu.org/licenses/>.
*/

#include "callwindow.h"
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QCloseEvent>
#include <QDebug>

CallWindow::CallWindow(QByteArray peer_id, bool incoming)
	: m_peer_id(peer_id), is_incoming(incoming)
{
	setAttribute(Qt::WA_DeleteOnClose);

	QVBoxLayout *lv = new QVBoxLayout(this);
	QHBoxLayout *lh = new QHBoxLayout();

	pbAccept = new QPushButton(tr("Accept"), this);
	pbCall = new QPushButton(tr("Call"), this);
	pbHang = new QPushButton(tr("Hang Up"), this);
	lbTimer = new QLabel(this);
	lbTimer->setAlignment(Qt::AlignCenter);
	lbTimer->hide();
	lbTransport = new QLabel(this);
	lbTransport->setAlignment(Qt::AlignCenter);
	lbTransport->hide();
	lbVideo = new QLabel(this);
	lbVideo->setAlignment(Qt::AlignCenter);
	lbVideo->setMinimumSize(320, 240);
	lbVideo->hide();
#ifdef HAVE_VAAPI
	videoGpu = VaapiRenderWidget::create(this);
	videoGpu->widget()->setMinimumSize(320, 240);
	videoGpu->widget()->hide();
	connect(videoGpu->widget(), SIGNAL(renderingFailed(QString)), this, SLOT(gpu_rendering_failed(QString)));
#endif
	callTimer = new QTimer(this);
	callElapsedSeconds = 0;

	lv->addWidget(lbTimer);
	lv->addWidget(lbTransport);
	lv->addWidget(lbVideo);
#ifdef HAVE_VAAPI
	lv->addWidget(videoGpu->widget());
#endif

	lh->addWidget(pbAccept, Qt::AlignLeft);
	lh->addWidget(pbCall, Qt::AlignLeft);
	lh->addWidget(pbHang, Qt::AlignRight);
	lv->addLayout(lh);
	setLayout(lv);

	connect(pbCall, SIGNAL(clicked()), this, SLOT(call()));
	connect(pbHang, SIGNAL(clicked()), this, SLOT(hang()));
	connect(pbAccept, SIGNAL(clicked()), this, SLOT(accept()));
	connect(callTimer, SIGNAL(timeout()), this, SLOT(update_call_timer()));

	if (is_incoming)
	{
		pbCall->hide();
	}
	else
	{
		pbAccept->hide();
	}
}

void CallWindow::call_started()
{
	pbCall->hide();
	pbAccept->hide();

	callElapsedSeconds = 0;
	lbTimer->setText("00:00");
	lbTimer->show();
	callTimer->start(1000);
}

void CallWindow::call_ended()
{
	callTimer->stop();
	pbHang->setDisabled(true);
	lbTransport->hide();
}

void CallWindow::setMediaTransport(bool direct_udp, QString ciphersuitename)
{
	if (direct_udp)
		lbTransport->setText(tr("🔐 media: direct UDP, %1").arg(ciphersuitename));
	else
		lbTransport->setText(tr("media: through the chat connection"));

	lbTransport->show();
}

void CallWindow::showRemoteFrame(QImage frame)
{
	if (frame.isNull())
		return;

	if (lbVideo->isHidden())
		lbVideo->show();

	lbVideo->setPixmap(QPixmap::fromImage(frame).scaled(lbVideo->size(),
	                                                    Qt::KeepAspectRatio,
	                                                    Qt::SmoothTransformation));
}

#ifdef HAVE_VAAPI
void CallWindow::showRemoteHwFrame(AVFramePtr frame)
{
	if (!frame)
		return;

	// The widget has given up on drawing - ask again for frames the label can
	// show, and keep the video area with it.
	if (!videoGpu->isWorking())
	{
		emit video_rendering_failed();
		return;
	}

	// These frames hold a GPU surface rather than pixels, so the label cannot
	// show them - the GL widget takes over the video area instead.
	if (videoGpu->widget()->isHidden())
	{
		lbVideo->hide();
		videoGpu->widget()->show();
	}

	videoGpu->setFrame(frame);
}

void CallWindow::gpu_rendering_failed(QString message)
{
	// Nothing will ever appear in the GL widget now, so hand the video area
	// back to the label and ask for frames it can actually show. Without this
	// the rest of the call would be spent looking at an empty black rectangle.
	qWarning() << message;

	videoGpu->widget()->hide();
	lbVideo->show();

	emit video_rendering_failed();
}
#endif

void CallWindow::update_call_timer()
{
	int hours, minutes, seconds;
	QString text;

	callElapsedSeconds++;

	hours = callElapsedSeconds / 3600;
	minutes = (callElapsedSeconds % 3600) / 60;
	seconds = callElapsedSeconds % 60;

	if (hours > 0)
		text = QString("%1:%2:%3").
		    arg(hours, 2, 10, QChar('0')).
		    arg(minutes, 2, 10, QChar('0')).
		    arg(seconds, 2, 10, QChar('0'));
	else
		text = QString("%1:%2").
		    arg(minutes, 2, 10, QChar('0')).
		    arg(seconds, 2, 10, QChar('0'));

	lbTimer->setText(text);
}

void CallWindow::call()
{
	emit start_call_pressed();
}

void CallWindow::hang()
{
	emit hang_call_pressed();
}

void CallWindow::accept()
{
	emit accept_call_pressed();
}

void CallWindow::closeEvent(QCloseEvent *e)
{
	emit callwindow_closed(this);

	e->accept();
}