/***

  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 "planarfiledevice.h"

namespace olive
{

PlanarFileDevice::PlanarFileDevice(QObject *parent)
	: QObject(parent)
{
}

PlanarFileDevice::~PlanarFileDevice()
{
	close();
}

bool PlanarFileDevice::open(const QVector<QString> &filenames,
							QIODevice::OpenMode mode)
{
	if (isOpen()) {
		// Already open
		return false;
	}

	files_.resize(filenames.size());
	files_.fill(nullptr);

	for (int i = 0; i < files_.size(); i++) {
		files_[i] = new QFile(filenames.at(i));
		if (!files_[i]->open(mode)) {
			close();
			return false;
		}
	}

	return true;
}

qint64 PlanarFileDevice::read(char **data, qint64 bytes_per_channel,
							  qint64 offset)
{
	qint64 ret = -1;

	if (isOpen()) {
		for (int i = 0; i < files_.size(); i++) {
			// Kind of clunky but should be largely fine
			ret = files_[i]->read(data[i] + offset, bytes_per_channel);
		}
	}

	return ret;
}

qint64 PlanarFileDevice::write(const char **data, qint64 bytes_per_channel,
							   qint64 offset)
{
	qint64 ret = -1;

	if (isOpen()) {
		for (int i = 0; i < files_.size(); i++) {
			// Kind of clunky but should be largely fine
			ret = files_[i]->write(data[i] + offset, bytes_per_channel);
		}
	}

	return ret;
}

qint64 PlanarFileDevice::size() const
{
	if (isOpen()) {
		return files_.first()->size();
	} else {
		return 0;
	}
}

bool PlanarFileDevice::seek(qint64 pos)
{
	bool ret = true;

	for (int i = 0; i < files_.size(); i++) {
		ret = files_[i]->seek(pos) & ret;
	}

	return ret;
}

void PlanarFileDevice::close()
{
	for (int i = 0; i < files_.size(); i++) {
		QFile *f = files_.at(i);
		if (f) {
			if (f->isOpen()) {
				f->close();
			}
			delete f;
		}
	}
	files_.clear();
}

}