#include "diskinfo.hpp"

namespace ZShell::services {

namespace {

constexpr qreal kKib = 1024.0;

} // namespace

DiskInfo::DiskInfo(QString mount, quint64 usedBytes, quint64 totalBytes, bool hasRoot, QObject* parent)
	: QObject(parent)
	, m_mount(std::move(mount))
	, m_usedBytes(usedBytes)
	, m_totalBytes(totalBytes)
	, m_hasRoot(hasRoot) {
}

QString DiskInfo::mount() const {
	return m_mount;
}

qreal DiskInfo::used() const {
	return static_cast<qreal>(m_usedBytes) / kKib;
}

qreal DiskInfo::total() const {
	return static_cast<qreal>(m_totalBytes) / kKib;
}

qreal DiskInfo::free() const {
	const quint64 freeBytes = m_totalBytes > m_usedBytes ? m_totalBytes - m_usedBytes : 0;
	return static_cast<qreal>(freeBytes) / kKib;
}

qreal DiskInfo::perc() const {
	return m_totalBytes > 0 ? static_cast<qreal>(m_usedBytes) / static_cast<qreal>(m_totalBytes) : 0.0;
}

bool DiskInfo::hasRoot() const {
	return m_hasRoot;
}

void DiskInfo::update(quint64 usedBytes, quint64 totalBytes, bool hasRoot) {
	const bool usedDiff = usedBytes != m_usedBytes;
	const bool totalDiff = totalBytes != m_totalBytes;
	const bool rootDiff = hasRoot != m_hasRoot;

	m_usedBytes = usedBytes;
	m_totalBytes = totalBytes;
	m_hasRoot = hasRoot;

	if (usedDiff) {
		Q_EMIT usedChanged();
	}
	if (totalDiff) {
		Q_EMIT totalChanged();
	}
	if (usedDiff || totalDiff) {
		Q_EMIT freeChanged();
		Q_EMIT percChanged();
	}
	if (rootDiff) {
		Q_EMIT hasRootChanged();
	}
}

} // namespace ZShell::services