#include "updatemanager.hpp"
#include <QStandardPaths>

void UpdateManager::set_packages(const QVariantList& value)
{
  const int oldCount = packageCount();
  m_packages = value;

  emit packagesChanged();
  if (packageCount() != oldCount) emit packageCountChanged();
}

void UpdateManager::set_is_checking(bool value)
{
  if (m_isChecking == value) return;
  m_isChecking = value;
  emit isCheckingChanged();
}

void UpdateManager::on_process_finished(int exit_code, QProcess::ExitStatus status)
{
  if (status == QProcess::CrashExit || (exit_code != 0 && exit_code != 2))
  {
    on_process_error(m_process.error());
    return;
  }

  const QString output = QString::fromUtf8(m_process.readAllStandardOutput());
  const QStringList lines = output.split(QLatin1Char('\n'), Qt::SkipEmptyParts);

  QVariantList package_list;
  package_list.reserve(lines.size());

  for (const QString &line : lines)
  {
    const QStringList parts = line.split(QLatin1Char(' '), Qt::SkipEmptyParts);
    if (parts.size() != 4 || parts.at(2) != QStringLiteral("->")) continue;

    QVariantMap package;
    package.insert(QStringLiteral("name"), parts.at(0));
    package.insert(QStringLiteral("version"), parts.at(1) + QStringLiteral(" → ") + parts.at(3));
    package.insert(QStringLiteral("updated"), false);
    package.insert(QStringLiteral("updating"), false);
    package_list.append(package);
  }

  set_packages(package_list);
  set_is_checking(false);
}

void UpdateManager::on_process_error(QProcess::ProcessError error)
{
  if (!m_isChecking) return;

  QString reason;
  if (error == QProcess::FailedToStart)
  {
    reason = QStringLiteral("failed to start: ") + m_process.errorString();
  }
  else
  {
    reason = QStringLiteral("failed, exit code %1").arg(m_process.exitCode());
    const QString errText = QString::fromUtf8(m_process.readAllStandardError()).trimmed();
    if (!errText.isEmpty()) reason += QStringLiteral(": ") + errText;
  }

  qWarning().noquote() << "checkupdates" << reason;
  set_is_checking(false);
}