/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive 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 "exportformatcombobox.h"

#include <QHBoxLayout>
#include <QLabel>

#include "ui/icons/icons.h"

namespace olive
{

ExportFormatComboBox::ExportFormatComboBox(Mode mode, QWidget *parent)
	: QComboBox(parent)
{
	custom_menu_ = new Menu(this);

	// Populate combobox formats
	switch (mode) {
	case kShowAllFormats:
		custom_menu_->addAction(CreateHeader(icon::Video, tr("Video")));
		PopulateType(Track::kVideo);
		custom_menu_->addSeparator();

		custom_menu_->addAction(CreateHeader(icon::Audio, tr("Audio")));
		PopulateType(Track::kAudio);
		custom_menu_->addSeparator();

		custom_menu_->addAction(CreateHeader(icon::Subtitles, tr("Subtitle")));
		PopulateType(Track::kSubtitle);
		break;
	case kShowAudioOnly:
		PopulateType(Track::kAudio);
		break;
	case kShowVideoOnly:
		PopulateType(Track::kVideo);
		break;
	case kShowSubtitlesOnly:
		PopulateType(Track::kSubtitle);
		break;
	}

	connect(custom_menu_, &Menu::triggered, this,
			&ExportFormatComboBox::HandleIndexChange);
}

void ExportFormatComboBox::showPopup()
{
	custom_menu_->setMinimumWidth(this->width());
	custom_menu_->exec(mapToGlobal(QPoint(0, 0)));
}

void ExportFormatComboBox::SetFormat(ExportFormat::Format fmt)
{
	current_ = fmt;
	clear();
	addItem(ExportFormat::GetName(current_));
}

void ExportFormatComboBox::HandleIndexChange(QAction *a)
{
	ExportFormat::Format f =
		static_cast<ExportFormat::Format>(a->data().toInt());
	SetFormat(f);
	emit FormatChanged(f);
}

void ExportFormatComboBox::PopulateType(Track::Type type)
{
	for (int i = 0; i < ExportFormat::kFormatCount; i++) {
		ExportFormat::Format f = static_cast<ExportFormat::Format>(i);

		if (type == Track::kVideo &&
			!ExportFormat::GetVideoCodecs(f).isEmpty()) {
			// Do nothing
		} else if (type == Track::kAudio &&
				   ExportFormat::GetVideoCodecs(f).isEmpty() &&
				   !ExportFormat::GetAudioCodecs(f).isEmpty()) {
			// Do nothing
		} else if (type == Track::kSubtitle &&
				   ExportFormat::GetVideoCodecs(f).isEmpty() &&
				   ExportFormat::GetAudioCodecs(f).isEmpty() &&
				   !ExportFormat::GetSubtitleCodecs(f).isEmpty()) {
			// Do nothing
		} else {
			continue;
		}

		QString format_name = ExportFormat::GetName(f);

		QAction *a = custom_menu_->addAction(format_name);
		a->setData(i);
		a->setIconVisibleInMenu(false);
	}
}

QWidgetAction *ExportFormatComboBox::CreateHeader(const QIcon &icon,
												  const QString &title)
{
	QWidgetAction *a = new QWidgetAction(this);

	QWidget *w = new QWidget();
	QHBoxLayout *layout = new QHBoxLayout(w);

	QLabel *icon_lbl = new QLabel();

	QLabel *text_lbl = new QLabel(title);
	text_lbl->setAlignment(Qt::AlignCenter);
	QFont f = text_lbl->font();
	f.setWeight(QFont::Bold);
	text_lbl->setFont(f);

	icon_lbl->setPixmap(icon.pixmap(text_lbl->sizeHint()));

	layout->addStretch();
	layout->addWidget(icon_lbl);
	layout->addWidget(text_lbl);
	layout->addStretch();

	a->setDefaultWidget(w);
	a->setEnabled(false);
	return a;
}

}